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Posts Tagged VTEC

Honda Civic SR4/SR3 EG9/EG6 B16A MUGEN Cat-back Exhaust System 1st Generation

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This is the rarest item that I get from my ‘runner’, Mugen cat-back exhaust eystem 1st generation for my car, 2.25″ piping, JASMA tag, s-flow type muffler for street perfomance in very good condition!

Let exhaust exit freely will increase the power, isn’t true? There is something that need to consider too, like, back pressure, upgrade or you will downgrade your exhaust system, but I believe at Mugen R&D department.

Exhaust piping diameter is a crucial part in the exhaust system. For those with 1600cc engines and below, stick with anything less than 2.0″ except if you had extensive jobs on the engine such as higher compression pistons or performance camshaft upgrades. For stock VTEC or MIVEC 1600cc and above, around 2.0″ to 2.25″ is acceptable. Some people even use 2.5″ on stock VTEC but the result is poor at lower rpm because the exhaust gas have less velocity to travel. Apart from the diameter, the piping route is also important. Straight pipes are not really advisable for street because they tend to get in the way when you’re running on a road bump. It is annoying and you will get scratches on the bottom of the pipe, or worse bent pipes. Piping that follows the original route is the best. While it gives you stock appearance, many people claim that it gives better low end to midrange power compare to straight piping. While weak at low end, straight piping somehow tend to give better acceleration power because exhaust gas gets out easily because of the shorter pipe compare to stock. Source :

Made from only the highest grade polished 304 stainless steel!

From Mugen catalog,

This is my old system, 2.0″ piping, time to say goodbye…

Catalyst converter deleted (de-cat)! Catalyst converters are the biggest restriction to the exhaust gas flow. Removing it will definitely release some more power, but it is bad for environment.

My new system, fits! what the beautiful bend!

Muffler is more to cosmetic rather than performance. There is minimal difference in power output if we compare straight-thru type muffler (also known as N1 type) with s-flow type muffler (which usually have big resonator box). The later is seemed to be more preferable for street usage because more silent, thus giving more pleasant driving experience especially while in cruising mode. Personally, I would recommend Tanabe s-flow like the G-Medallion series because they are very silent when idling and cruising. This avoids attention from the authority. If you are going for N1 type, make sure it is made of good quality. Avoid imitations, they are widely sold by Wei Yip (tidak tipu customer) at surprisingly cheap price. Good exhaust doesn’t come cheap but they are worth it. Try to spend some time to go to ‘kedai potong’ and try look for used branded exhaust. They are worth it. Other than that, exhaust with JASMA tag (not JASMA brand) should be good enough for street. From my experience and observations, JASMA approved exhaust tend to be quiet, unless the used mufflers are already running out of fiber. If your setup is still noisy, it is advisable to install a resonator (bullet silencer) in the middle. Source :

Even I didn’t do dyno test, but I could feel, the sound and the power, gentle sound at the low RPM (1-4K), sporty sound without being too loud or raspy at the high RPM (5-7K), silent but deadly! overall sound is just amazing though.

Spoon Sports ‘Speed Shop Type-One’ – The Art of Car Maintenance

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As Honda enthusiast, We’re can’t run talk about good performing and maintaining our beloved Honda’s, Spoon Sports is a BIG name for Honda fan out there, they produced great quality performing parts and has earned a reputation for offering the highest form of service In the world of Honda tuning, but, how about Type-One? What their relationship with spoon? You, are really Honda fan out there will say “Who doesn’t know them? You idiot!”,  But do you really know what they actually do in their workshop? They perform maintenance art! They are a true artist, I hope, one day, I will be that level. To know them better, read theirblog –> Type-One Official Blog, but sadly, only available in Japanese language.

You are newbie? Don’t worry, let’s read a little bit about history subject, for hardcore, you can skip.

Spoon Sport History

Spoon Sports is a Japanese company formed in 1988. It is an engine tuner and parts manufacturer specializing in cars made by Honda. Their concept is to create vehicles that provide “total technology” and “real comfort”. The company logo of Spoon Sports is a play of words on Ichishima’s name. Ichishima’s first name is Tatsuru, and the Japanese name for crane is Tsuru, hence the logo of a crane. “The company name Spoon comes from an impregnable fortress of a corner at Suzuka Circuit 20 years ago.”

The company tunes and races Honda vehicles in numerous endurance races, and, additionally sells aftermarket parts to automotive enthusiasts. Spoon Sports provides many aftermarket parts for Honda cars. These include powertrain, suspension, aero-parts, wheels, drivetrain, braking system, cooling system and so on.

Some of the races Spoon has competed in include:

The founder, Ichishima Tatsuru was originally a racer. So just like Honda themselves, racing has always been in Spoon Sport’s blood. The first car that Ichishima-san raced was a Honda Civic.

Spoon was founded to specialize in tuning Honda engines in Takaido, Suginami, Tokyo along the Kōshū Kaidō Avenue. In 1988, Spoon started house development of a racing computer for use on Honda vehicles. Spoon designs and builds both major and minor components for Honda engines for use on Spoon Sports racing vehicles as well as for sale to the general public.

In 1996, Spoon began selling Honda B engine assemblies which Spoon precision balances and blueprints to ensure optimum performance during endurance racing. Since then, Spoon Sports have moved on to tune other Honda engines like the venerable K20A from the Civic/Integra and the L15A from the Honda Fit/Jazz.

In 1997, Spoon moved to a brand new building in Ogikubo, Suginami. They also began providing “Engine Lectures” as a part of their customer service program.

Type-One History

In 2001, Spoon opened “Speed Shop Type-One” across the street from the Spoon headquarters. This shop specializes in modifications to Honda’s “Type-R” vehicles and other performance oriented Hondas which include the Civic Type-R, Integra Type-R, Accord Euro-R and NSX-R. However, Spoon has also modified non-R vehicles like the Civic SiR, Honda S2000, Honda Legend and the Honda Fit/Jazz. The racing versions of the 2001 S2000 and 2003 Honda Fit models (both in Spoon’s then-current blue-and-yellow livery) were featured in Gran Turismo 4.

Type-One is Ichishima’s vision of how a Spoon Sports dealer should be. And that vision is the offer of a “complete tuned car, not just individual parts thrown in without consideration of whether they will work in harmony or simply interfere with each other.” Also, Ichishima wants to make it known this shop was not created to sell parts, but to provide customers with Type-One’s installation skills and know-how of Spoon products.

-END of history subject-

I would recommend you to read this article –> INTERVIEW>> TATSURU ICHISHIMA, below is my highlight Q & A, all credit and copyright belong to ,

Speedhunters: How and why did Spoon Sports begin and what was the main philosophy and objectives that you set out for the company?

Ichishima:  Around 1980 I began to realize that enthusiasts were starting to get interested in bringing their cars to the track. Back in those days soukoukai (track day) events where people took their street-registered cars to the local circuit didn’t exist, but I knew it would be something that would pick up quickly so that’s when I began to get the initial idea. At that time I was doing durability and development testing for Honda under the “Tatsuru Ichishima Company,” then eventually in 1988 I set up Spoon Sports as a separate company that developed and sold tuning and racing parts. As for the concept it was and still is very simple, make cars fun, not fast. Obviously slow cars are not fun but what I mean is to create a well-balanced package that doesn’t break or fail and thrills in every way. A good balance between power, handling and light weight. For example a GT-R is exciting because of its power but then in a corner, a small well prepared Civic will easily overtake it. So balance through tuning is our philosophy.

Speedhunters: I’m sure a lot or readers will be wondering what the difference between Spoon Sports and Type One is. Can you give a brief explanation?

Ichishima: Spoon takes care of parts development, special works and testing while Type One is where the end user takes his car for maintenance and tuning, like a speed shop or workshop. Type One opened back in 2000.

Speedhunters: At Speedhunters we are lucky enough to have readers that follow us from around the world. You obviously travel a lot and have had a chance to observe how people modify and personalize their cars. What do you think of the various styles you have see in the US, Europe, Australia or other parts of the world? How do they compare to Japan?

Ichishima: It’s hard to say by individual country but generally it’s obvious that a lot of passion exists and enthusiasts enjoy power. I’m not saying that’s bad but for example shooting for 500 HP in a car that is not designed to take that level of performance will lead to failures. I think some Japanese people are different, they tend to focus more on the background and mechanical side of a car to fully understand its history and lineage. It’s just a different way of appreciating cars.

Speedhunters: What is your favorite Honda?

Ichishima: Uhm, (laughs) I can’t really choose one car but one of my most favorite is the Civic.

Speedhunters: Why?

Ichishima: Well first of all it’s affordable and is small and compact.

Speedhunters: Which particular model of the Civic?

Ichishima: Uhm the old EG, also the EK. Up until then it was a three-door hatch back, useful to carry people and stuff but was sporty at the same time, enjoyable to drive. It was the first car in Japan to offer all these factors. That’s why I like it.

Speedhunters: What is your favorite Honda engine?

Ichishima: The B16A and B16B and also the B18C, I really like the whole B-series of engines. They are real screamers! (lots of engine screaming sounds follow!) I’ll give you an example. Ferraris and Lamborghinis are like women that are great in bed, but not so great at cleaning the house or cooking.

The B-series is a more balanced engine; it’s great in bed but also great at doing the chores. Frugal and civilized. You get the idea? Also, the most important thing about an engine is the noise and sound (more engine noises follow!). It has to give you goose bumps. Anyway, I like non-gimmicky cars, I like simple cars and engines.

-END of interview-

Wow! Honda Civic Eg is one of Ichisma favorite car, make me proud of my beloved EG

Since Honda already builds its engines to very high standards, it’s hard to improve more without compromising longevity and usability, We’ve all heard stories of people bolting on pod filters and large bore exhausts to their Honda in the pursuit of power gains when, in actual fact, they were achieving the exact opposite. You certainly can’t disrupt the fine-tuning and precise balance between intake and exhaust on high-compression naturally aspirated engines. It’s precisely this way of thinking that has pushed Spoon to further fine-tune Honda powerplants, rather than “disturb” their natural balance.

You may think engine build is simple as just assemble each parts. But the most important thing when you build engine is how build it to. For example, if built a standard engine with more care like cleaning individual parts carefully and measure those parts correctly, the engine should perform better even if it’s standard specification. Even it will be possible to change character of the engine. This is what their specialty, fine-tuning and took restriction away from the engine, from what I read from their browser, their skilled engine builder  spends three days for cleaning and parts and build engine as same as racing engine standard.

Below is several pictures I take from Type-One Official Blog &, all credit and copyright belong to them. I hope you will find some idea and inspiration,


Honda Civic EK9 Type-R B16B – The Art of Automotive Engineering

Posted in My Automotive Life | 7 Comments »

Yes, I know…this is lame topic, but, as engineering student, Honda Civic Type-R production is always give me a great inspiration “The quality never know the bound”! so, you can say, this is my tribute entry. I collected the fact and data from the internet. I recommend you to read this article if you are newbie about Honda VTEC before you scroll down.

This topic I would like to dedicate to the first model of Honda Civic Type-R , EK-9, the legendary, the legacy, the power of dream!




The Honda Civic Type R is the highest performance version of the Honda Civic made by Honda Motor Company of Japan. It features a lightened and stiffened body, specially tuned engine and upgraded brakes and chassis. Red is also used in the interior to give it a special sporting distinction and to separate it from other Honda models. In Japan, a one-make series of Honda Type R cars where privateers can purchase an off-road Type R and compete in a series championship is a stepping stone for many aspiring racing drivers.  Source :

1st generation (EK9 chassis)

The first Civic to receive the ‘Type R’ name was based on the 6th-generation ‘EK’ Civic. The contributing base model was the JDM Civic 3-door hatchback called SiR, code named EK4. Like its big brother the Integra Type R DC2/JDM DB8, the Civic SiR’s transformation into a Type R was achieved by working on the base model and improving it to Honda’s idea of a car capable of high performance on the circuit.

The first Civic to receive the Type R badge was introduced in 1998 as the EK9. The EK9 shared many characteristics with the Integra Type R DC2/ JDM DB8 such as omission of sound deadening and other weight-reduction measures, a hand-ported B16B engine, front helical limited-slip differential and close ratio gearbox etc.. The B16B engine boasted one of the highest power output per litre of all time for an NA engine with 185 PS (136 kW; 182 hp) from a 1.6L. For the first time, a strategically seam welded monocoque chassis was used to improve chassis rigidity. The interior featured red Recaro seats,red Recaro door cards and red Recaro floor mat, a titanium shift knob and a Momo steering wheel. In 1999 the Type Rx was introduced featuring a CD player, body colored retractable electric door mirrors, power windows, auto air conditioning, key-less entry unlock system, aluminum sports pedals, and a carbon type center panel. The SiR badge from the previous 2 generations was ceded to the EK4 Civic as a mainstream sedan and hatchback which was sold in huge numbers across the globe due to its relatively low cost, practicality and everyday usable street performance/drivability.

– End of Introduction –

To make you clear, I’ll put the data that I collected from WWW, this the comparison between base model (EK-4) was also the great car and Type-R model (EK-9) improve from the great car and engine!


Model Variant VTi-R TYPE R
Car Series EK4 EK9
Year 1995-1998 1997 – 2001
Doors and Body Style 3DR Hatch 3DR Hatch
Engine Size 1595cc B16A2 1595cc B16B Spec R
Cylinders 4 4
Transmission 5M 5M with LSD
Standard Features 15″ Alloy Wheels, 4 Speaker Stereo, ABS (Antilock Brakes), Adjustable Steering Col. – Tilt & Reach, Air Conditioning, Airbags – Driver & Passenger (Dual), Central Locking, Engine Immobiliser, Paint – Metallic, Power Door Mirrors, Power Steering, Power Windows, Radio Cassette, Sunroof – Electric and Tilt, Suspension – Sports, Seats – Sport bucket, Centre Console with dual cup holder, Rear seat head restraints, Digital Clock 15″ Alloy Wheels, Rear Spoiler, Momo Steering Wheel, Recaros
Optional Features Central Locking, Power Windows, Power Mirrors, Power Steering, Radio Cassette with 4 Speakers, Dual Airbag Package, ABS
Cosmetics Leather wrapped MOMO Steering wheel with SRS airbag, Red Carpet, Red Arm rests, Red Floormats with Type R badging, Titanium gear shifter, Red stiched boot, Carbon centre dash console with Type R badge, Type R Instument cluster, Carbon dash bezel, Emergency Flare, No Coin holder, Red Recaro seats, Bodykit, Red exterior badging, Colour coded exterior panels, UV cut glass, Privacy glass,
Red engine head cover,
Aluminum radiator,
Helical LSD
Front Brakes Vented Discs (262mm), ABS Larger Vented Disc (282mm), ABS (optional)
Rear Brakes Disc (242mm) Disc (262mm)
Wheel Dimension 195-55-15 195-55-15 Enkei 5 stud PCD
Turning Circle 9.8m 9.8m
Tank Capacity 45 litres 50litres
Exterior Length 4180mm 4185mm
Exterior Width 1695mm 1695mm
Exterior Height 1375mm 1360mm
Front Track 1475mm 1480mm
Rear Track 1475mm 1480mm
Wheel Base 2620mm 2620mm
Front Suspension Ind; double wishbones with coil springs gas damper and stabiliser bars Ind; double wishbones with coil springs gas damper
Rear Suspension Ind; double wishbones with coil springs gas damper and stabiliser bars Ind; double wishbones with coil springs gas damper and trailing link
Kerb Weight 1105kg 1059kg (97 Spec) 1089kg (98 Spec)
Ground Clearance 106mm 105mm
1/4 Mile time 16.2 15.5

Power Section


Engine Type B16A (1992-1995)JDM B16B Spec R
Bore x Stroke 81×87.2mm 81×87.2mm
Maximum Output 170ps/7800rpm 185ps/8200rpm
Maximum Torque 16.0kg-m/7300rpm 16.3kg-m/7500rpm
Displacement 1595cc 1595cc
Compression 10.4 10.8
Maximum RPM 8000rpm 8400rpm
Valve Timing at 1mm lift            IN Open/Close

EX Open/Close

Valve Lift (Max Lift)
IN 10.7mm, EX 9.4mm IN 11.5mm, EX 10.5mm
Inlet Valve Diamter 33mm x 2mm 33mm x 2mm
Spark Plug Type Heat Rate #6 Heat Rate #7 platinum
Throttle Bore Diameter 60mm 60mm
Intake Manifold Single pipe sideflow Single pipe sideflow
Air Intake Diameter 65mm 65mm
Exhaust Manifold 4-to-2 4-to-2
Exhaust Pipe Diameter 48.6-50.8mm 57.2mm
Silencer Flow Capacity 98liter/sec 115liter/sec
Cam Profile

Max Lift (IN/EX)Open Timing (IN/EX)Close Timing (IN/EX)

10.7/9.4BTDC15/BBDC40ABDC 45/ATDC 7 11.5/10.5BTDC 18/BBDC45BTDC 45/ATDC 10
Connecting rod bearing width 19.5 mm Tetra-methyl lead coated crank
17.5 mm
Connecting rod Chrome carbon steel High chrome carbon steel
Piston Molybdenum coated low friction
Block Height 263mm 270mm


LSD None Helical LSD
Code Y2 S80 (S4C)
Gear Ratio
1st 3.230 3.230
2nd 2.105 2.105
3rd 1.458 1.458
4th 1.107 1.107
5th 0.848 0.848
Reverse 3.000 3.000
Final Gear Ratio 4.400 4.400


The Masterpiece of Art!

So, what actually they (Honda’s Engineer) do? To create such a masterpiece, not an easy task, to create masterpiece (B16B)  from already masterpiece (B16A) is very difficult task! And I’m here not only talked about power, because, with ‘aftermarket’ it’s very easy to archive as long as you have money, I’m more focus about balance, harmonic, durability, research and art!

On the below are the power curves for B16A 170ps versus B16B. Note the big gain in power after 6000rpm, the VTEC switch-over point between mild and wild cam profiles. The gain at extreme high rpms is readily apparent on the curves. Source :

Honda tune the R by hand

This is one of the factors why R are so limited, Honda using their experience and knowledge gained in the racing field  and making use of it in their production lines for street cars. The Civic’s VTEC B16B type engine retained its stock displacement, but Honda increased its horsepower from 170 (B16A) to 185 (B16B). It’s only *15* horses more, but those 15 horses were really tweaked out using Honda’s formula 1 knowledge — from an engine that was already getting 100 horsepower per liter!

Currently, production line engines and engine parts are made by computer-guided NCR machines, and are of very high quality. However, Mr. Fumiyasu Suga (Type R’s assistant chief engineer) believes that in order to make a true race engine, some parts must be built/assembled by hand. In specific, the assembling of the engine, balancing parts, and porting and polishing need to be done by hand. Amazingly, all Type R engines are built this way. Source :


One of the keys to tuning a NA engine is the piston. In order to increase the compression ratio, aluminum, pent-roof-type pistons were used. In order to keep a good precision of mass, the aluminum pistons were forged. The piston ring was given more space to move around in, and to prevent piston “head” shake caused by the extra space, a molybdenum coating (also used in the NSX) was applied to lessen friction. Source :

The piston skirt was made lighter in order to lessen the inertial mass. Since lightening the piston causes the piston “neck” to rock back and forth, a molybdenum coating was applied to lessen friction.

In order to increase compression ratio, the side molds of the pistons were increased, from 10.4 to 10.8, The picture below shows you the differences between JDM Civic Type R B16B and JDM B16A Sir2 (EK4) P30.

Injectors installed on the underside of the pistons allow for improved cooling, and prevent the pistons from getting “burned-in”.


For endurance, B16B used B18C spec R’s cylinder block, that mean it’s destroked from B18C and using same timing belt (Honda PN: 14400-P72-014, not compatible with B16A (14400-P2T-004)), also the engine bridge girdle and cylinder head bolts (90006-P72-003, 11×164) vs from B16A (90006-PG6-003, 11×155).

Connecting Rods

The con rods are specially made for the Type R. The precision weight of these con rods are 2 levels above that of on-line production models. The weight differential between all four rods is so small that it is negligible, and all contacting surface areas are finished off with a race-car, mirror finish, and is connected to a fully balanced crankshaft. Furthermore, the assembly of the con rods and the crankshaft play an important role in attaining the high rpm’s. In order to ensure perfect assembly, the engine is taken off-line and these parts are assembled by hand. A custom con rod micrometer gauge is used, and the stretching of the con rod bolt is taken into account for as the connections are tightened. This is something no machine can do, and this ensures that there aren’t any unwanted vibrations at high rpm.  Source :

Custom-made connecting rods for the Type R. It is made to withstand the higher rpm’s, and is still lighter than the stock parts. These Type R parts are made with such precision that the weight difference between all four rods is so small that it is negligible.

B16B(77.4mm crankshaft and 142.42mm connecting rod) vs B18C (87.2mm crankshaft and 137.9mm connecting rod)

Hand Job Porting

The video below show the porting job for B18C 96spec R, the procedure is similar for B16B, by Honda Motor Co.,Ltd. Suzuka Plant  mechanic,

Naturally, porting and polishing excessively won’t yield good results — it will only upset the balance between displacement and peak rpm’s. Some basic physics explained… In any cylindrical enclosure/piping, the closer air is to the metal wall, it will flow slower, and the closer it is to the center of the cylinder, it will flow faster. As rpm’s increase, slight variations in the enclosure will cause for serious air flow disturbances. Logically speaking, a straight, cylindrical port would prevent any problems of air-flow disturbance, but with street cars and their limited engine bay space, the port has to be bent.

The stock port is built to within such precision that it can already withstand rpm’s of up to 7,000 rpm without creating any unwanted air-flow disturbances, but once it reaches 8,200 rpm, the engine struggles to keep the air flowing smoothly. To augment this problem, two of the best mechanics at Honda were selected and assigned to manually port and polish the engine components. Though this limits production to 25 engines a day, this allows for the engine to reach 8,500 rpm, and respectively, 185 horsepower.

Valves and the Valve Springs

Next, the valves and the valve springs needed to be upgraded in order to be able to withstand the high rpm’s and the increased fuel injection. In order to increase air flow efficiency, the angle of the valve seat opening was tightened from 60 to 45 degrees. Also, bigger and lighter valves help to deliver more fuel. Instead of making the valve bigger, Honda engineers made the cone bigger and reduced the stem radius even further. In specific, the underside of the valve cone was shaved to its limit, and the valve shaft width was decreased from 5.5mm to 4.6mm — making the valve 12% lighter than stock. Amazingly, the valves are made so precisely that their static balance differential is basically 0.0. We jokingly asked Mr. Suga what he would do if Honda’s parts manufacturers sent over valves that had weight differences. His reply was quick and simple. “We would toss them out.” Hm… very strict. Past 8,000 rpm, other valve-related problems occur. Such problems include surging, jumping, bouncing, etc… In order to prevent such problems, the valve springs are made by dual-bound springs. Furthermore, Honda used non-cylindrical, “flat” springs in order to keep the spring height near-stock, and still increase rebounding power. Source :

B16B B18C Type R Intake Valves are same diameter as regular B-series valves but have distinct advantages in being 12% lighter in mass, with noticeably thinner valve stem from 5.5mm to 4.6mm, hence larger cone area and an improved contour for better air flow. Type R lightened intake valves are made so precise that their static balance differential is basically 0.0. Type R intake dual valve springs are specially made to work with Type R lightened intake valves for higher lift and rpm specifications. They are non-cylindrical, flat springs with increased rebounding power while their spring height are still near-stock. This will help to prevent valve-related problems past 8000 rpm such as surging, jumping, bouncing etc.

In order to prevent engine knocking at high rpm’s, NGK’s high-spark #7 platinums are used. Honda is so meticulous with its Type R production that it actually coats the spark plug tip with silicone so the spark plug doesn’t collect any unwanted deposits during the stop-and-go of transportation. (Wow… does that help any?)


The camshaft profiles (wild cam) change from B16A2 and B16B are :

Cam Profile

JDM B16A 170ps

B16B 98R

Max Lift (IN/EX)



Open Timing (IN/EX)



Close Timing (IN/EX)



BTDC = Before Top-Dead-Center, BBDC = Before Bottom-Dead-Center

ABDC = After Bottom-Dead-Center, ATDC = After Top-Dead-Center

The camshaft lift amount was changed for both intake and exhaust valves. The intake lift was increased from 10.7mm to 11.5mm, and the exhaust lift was increased from 9.4mm to 10.5mm. To compensate, the intake opening timing was increased from 15 to 18 degrees before piston apex, and closing timing was increased from 40 to 45 degrees after the piston reaching base. Likewise, the exhaust opening timing was increased from 40 to 45 degrees before the piston reaching base, and the closing timing was increased from 7 to 10 degrees after piston apex. By doing so, the valves remain open longer — allowing for more air to enter the combustion chamber.


To make sure the engine has a enough breath at the high RPM, the intake manifold was being modified (High-RPM type), the body is  bigger and the plenums are short and fat compare to the B16A intake manifold.

The throttle bore diameter for B16B is identical to B16A at 60mm. This means that enlarged throttle bodies for B16A might not be an optimal mod or that a compromise in power delivery might result, eg loss of low-end power in return for gain in high-end power.


Unlike the base crankshaft, additional balancing weights were added on number 1 and 4, and allows for smooth, high-rpm revving — making it a 8-weight, fully-balanced crankshaft.

The attachment point of the connecting rods to the crankshaft uses a new, adjustable connector that allows the mechanics to manually adjust the connection using a micrometer so they can compensate for the stretching of the connecting rod bolt.

Exhaust system

In order to make exhaust air flow smoother, there are no sharp angles in the header. Furthermore, in order to lighten/strengthen the parts, stainless steel was used.
Impossible to do in mass-production, all exhaust piping is welded together with no sharp edges throughout. Also, the piping was upgraded to 57.2mm throughout to increase air flow.

The muffler is a multi-chamber design, and does a wonderful job of dissipating sound. However, the funnel-shaped piping in-between the chambers makes it a very free-flowing exhaust.


Adopt a lightweight flywheel dedicated to the type R transmission , was approximately 10% lighter from the base model. In addition, to reduce the stroke select direction, with the shift direction, change also provides a sporty feel light and applied in conjunction with a double-cone synchronizer speed to the second speed.

Installed with the torque-sensitive helical LSD, to provide excellent traction when cornering. With the improvement of turning limit, the result is excellent acceleration and  less understeer, a feel good sentiment turning.

cut model of the helical LSD

The Body

The main points of the body strengthening.

“In overview, over 60 engine-related parts were changed or entirely re-designed for the Type R. We asked Mr. Suga for any other advice on tuning the Type R any further. He replied, “I would prefer that people don’t try to further tune the Type R. No, actually, they shouldn’t try. Each upgraded part works in perfect harmony, and fiddling with the factory setting will only lead to a decrease in performance.” It’s probably safe to say that the Type R is a rare, “fully tuned” and “stock” automobile. ” Source :

 I hope you will get some inspiration too!



DIY : Honda B-Series Engine Stopper Rubber/engine mount Replacement

Posted in My Automotive Life | No Comments »

This is normal maintenance. Small job, straightforward…

This piece is called engine stopper rubber but some people called it engine mount, used to absorb vibration from your engine at the both site (left and right) especially when launch time or changing gear, so, it will effect engine torque a little bit.

Jack up the car and remove the tires on both sides.

I started with the right side, open the splash shield…

Wow! Now I know why my engine dance sometimes…

Before remove it, gently and slowly jack the engine up using a piece of wood on the jack to distribute weight evenly on the oil pan and also at the gearbox.

To remove it, very easy job, straightforward until I’m too lazy to write on…

Same goes to right side…


Horrible and disaster!

Replace with the new parts…

 All done, throttle response is back and so is smoother gear shifting. Car is also quieter at idle now with fewer vibrations. 

DIY : Honda Civic B-Series Engine Oil Pan/Oil Sump Gasket Replacement

Posted in My Automotive Life | No Comments »

This is critical maintenance issue to handle (if you are first timer), every step to install is critical, the worse case is, your engine oil may dry at the time you drive and overheat or you just lucky to repeat all the step and waste your time and money, I bear all this in my mind, so, I better not to do any single mistake.

DISCLAIMER: I can not say this is the best or safest way to do. I am not
responsible for any thing you damage, or what ever harm you cause to
yourself or others. This is how I did it and it worked for me.

First, need to make sure the leak is REALLY come from oil pan/oil sump or somewhere else, so, after looking around, yes obviously…

1st step, drain out the engine oil…

This is the reason why you need to replace oil drain bolt washer,

To gain more access room, remove the splash shield,

The next step is to remove entire header (I mean before catalyst converter), need to disconnect the oxygen sensor at the first place,

Remove exhaust pipe bracket nut,

Remove exhaust manifold bracket bolt,

Remove nut that tight exhaust pipe (from the header) and catalyst converter,

Remove the header cover and the entire self-locking nut that hold the header, and carefully remove header from your engine…replace the gasket if needed.

I took this chance to cleans the head exhaust side holes from carbon deposit that build-up,

Remove the bracket that connects between engine block and gearbox (optional) to gain more access room, remove flywheel cover.

And then, remove the oil pan/oil sump,

I think, this the source of leak…there are two leaking major factor, 1st the wrecked gasket and 2nd the bending oil pan. My oil pan looks flat and ok.

So, shopping time!

WARNING : The procedure below is a fatal to follow, or you will probably face the never ending leak. Just to remember, this procedure is suitable for Honda B-series engine only and I don’t recommend for other engine type.

This is important step, make sure everything is extremely clean, especially oil pan mate surface and block mate surface, I also clean all the stud, nut and bolt. The cleaner everything is the more you reduce your chances for leaks.

Look extremely closely at the two studs next to the transmission, gasket has 2 metal eyelets inside and lots of times the old ones get left behind on the studs. Remove it.

Put new gasket at the oil pan (don’t apply any liquid gasket at the oil pan), the gasket itself have 2 line that designed to prevent the oil leakage and this is good enough.

Apply liquid gasket (I recommend Hondabond, but my local dealer only have Permatex Ultra Grey RTV) as even bead, centered between the edges of the mating surface (cylinder block side only), just a little bit…I repeat, just a little bit.  Do not install the parts if five minutes or more have elapsed since applying the liquid gasket.

Tighten the nuts finger tight at six points as shown below.

Tighten all the bolts and nuts in two steps torque the bolts and nuts in a criss-cross pattern as shown below, starting from nut 1. Torque: 12 Nm (9 lb-ft), use only small torque wrench, or you can use your six sense (like I do).

Fill the engine oil and drive at the very least 3 or 4 hours after installing oil pan. My recommendation: 12 hours.


Install everything back in reverse and enjoy your drive and free from everyday-think-about-oil-pan-leak .