Jenvey ITBs for 2008 S2000 with DBW
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Honda-Tech Member
Joined: Apr 2006
Posts: 32
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From: FL, USA
Jenvey ITBs for 2008 S2000 with DBW
The Honda S2000 needs no introduction. Flagged as one of the most perfect and balanced cars ever produced, Honda has spent much R&D into producing this wonderful machine that enthusiasts all over the world either love it, or love to hate it. To some, it seemed totally unfair to race with such a perfect weapon, forged in the deepest Honda mountain in Japan.
However, the S2000 is very much still a mass produced car. While bystanders marvel at its amazing built, let us gain more insight into the cars capabilities from a owner’s point of view.
We have an example of a S2000, with the owner pursuing a route, often less travelled. First of all, we all agreed that the F22C is already very well built from factory, thus we would like to see what kind of power we can extract from this engine just with the basic mods: Intakes, exhaust and ECU.
When this car went onto the dyno initially, it had these mods strapped on.
- Gruppe M intake
- J’s racing LTA* approved header
- J’s racing LTA* approved 70mm titanium twin exhaust
- Hondata Intake Manifold Gasket for F22C
- Hondata Dual ECU setup for DBW AP2s
LTA is Singapore’s authority on vehicular modifications. Similar to CARB and TUV to a certain extent.
Here is the dyno chart.
Not very successful with the high end power. Honda has simply done too good a job for us to improve on it so easily. However, we did noticed that just by shifting Vtec engagement point lower, we are able to gain a huge juicy chunk of mid range torque and power. The mods and the tuning did bring more grunt to everyday driving. Slurpps!
However, nirvana was not to be attained so easily. After driving the grunted S2000 for awhile, the owner, having a taste of the automotive poison known as power, wanted more of it. This request was not one that was made without a bench mark too. He had taken his S2000 for a few good track sessions at Sepang International Circuit and decided that he would like more power.
Just like at the end of every rainbow, there is a pot of gold, ask any NA purist and they will tell you that at the end of the Naturally Aspirated rainbow, there is always a set of Jenvey Individual Throttle Bodies. From my experience with Honda engines, I know that this pot of “gold” will bring about a metamorphic change in the characteristics of the engine.
But firstly, some pictures
Throttle Bodies
Manifold to suit F22C’s head
Complete components
The assembly was put together before we installed everything on the engine. Throttle Bodies mated to the Manifold. Air Horns then bolted on to the Throttle Bodies. As the Air Horns selected for this set up is rather large and tapered. The edges of the bodies actually had to be machined down so that we do not have overlapping Air Horns and uneven air flow. While we are at it, we also gave the manifold a good polishing job; to smoothening out any imperfections in the casting to rid it of power-robbing unevenness.
The assembly was rather straight-forward as we simply remove the standard DBW hardware and attached the supplied Jenvey Throttle cable to the pedal. Instantly, we got the car to be driven by cable and the DBW lag is non-existent anymore.
As this was a street car, we also machined out an vacuum tank so that we are able to run an idle valve and give the MAP sensor a more balanced and stable reading. The idle valve definitely did heaps to the idle quality of the car with the A/C switched on or off. We could basically almost have the idle at a fixed RPM and the Hondata KPro did all the work to cope with the for A/C cutting in and out.
With this setup, the S2000 runs like a stock car!! This is very much to the contrary belief that quad throttles are very difficult to tune and have problems idling.
Vacuum Tank
Hondata Intake Manifold Gasket
Standard unported cylinder head
Finished product
Dyno Chart
The dyno graph shows a big jump in power anywhere after 4,000rpm. The lower power is NOT a power curve of the stock car. In fact, it is a graph with the bolt on mods as mentioned in the first dyno chart but running on the standard ECU.
The higher HP graph had only 1 variable compared to the other. It had the Jenvey ITBs in place of the GruppeM intake (and with the right tuning to suit). If we can gain 40hp here over an already fantastic intake kit (GruppeM)… And since most intake kit makes about 10hp over the stock air filter… Can we say that we are getting 50hp over the stock setup??? Can that even be true? Just an induction setup change (along with the exhaust and ECU of course) and we are getting 50hp!?!
I feel dizzy just thinking about it. Or is the dizziness a result of the heavenly orchestra of the Quad Throttles.
Now that I have seen these results and the cost involved in producing them, I begin to wonder why Honda did not make these a standard issue for all the S2000s. Hmmmm….Maybe the Perfect just got more Perfected
- We also carry ITB's for your B and H series as well as K series
- please give us a call for pricing
-Emerald Performance
Jenvey Dealer
(954)682-7281
Were located in FT Lauderdale , FL
However, the S2000 is very much still a mass produced car. While bystanders marvel at its amazing built, let us gain more insight into the cars capabilities from a owner’s point of view.
We have an example of a S2000, with the owner pursuing a route, often less travelled. First of all, we all agreed that the F22C is already very well built from factory, thus we would like to see what kind of power we can extract from this engine just with the basic mods: Intakes, exhaust and ECU.
When this car went onto the dyno initially, it had these mods strapped on.
- Gruppe M intake
- J’s racing LTA* approved header
- J’s racing LTA* approved 70mm titanium twin exhaust
- Hondata Intake Manifold Gasket for F22C
- Hondata Dual ECU setup for DBW AP2s
LTA is Singapore’s authority on vehicular modifications. Similar to CARB and TUV to a certain extent.
Here is the dyno chart.
Not very successful with the high end power. Honda has simply done too good a job for us to improve on it so easily. However, we did noticed that just by shifting Vtec engagement point lower, we are able to gain a huge juicy chunk of mid range torque and power. The mods and the tuning did bring more grunt to everyday driving. Slurpps!
However, nirvana was not to be attained so easily. After driving the grunted S2000 for awhile, the owner, having a taste of the automotive poison known as power, wanted more of it. This request was not one that was made without a bench mark too. He had taken his S2000 for a few good track sessions at Sepang International Circuit and decided that he would like more power.
Just like at the end of every rainbow, there is a pot of gold, ask any NA purist and they will tell you that at the end of the Naturally Aspirated rainbow, there is always a set of Jenvey Individual Throttle Bodies. From my experience with Honda engines, I know that this pot of “gold” will bring about a metamorphic change in the characteristics of the engine.
But firstly, some pictures
Throttle Bodies
Manifold to suit F22C’s head
Complete components
The assembly was put together before we installed everything on the engine. Throttle Bodies mated to the Manifold. Air Horns then bolted on to the Throttle Bodies. As the Air Horns selected for this set up is rather large and tapered. The edges of the bodies actually had to be machined down so that we do not have overlapping Air Horns and uneven air flow. While we are at it, we also gave the manifold a good polishing job; to smoothening out any imperfections in the casting to rid it of power-robbing unevenness.
The assembly was rather straight-forward as we simply remove the standard DBW hardware and attached the supplied Jenvey Throttle cable to the pedal. Instantly, we got the car to be driven by cable and the DBW lag is non-existent anymore.
As this was a street car, we also machined out an vacuum tank so that we are able to run an idle valve and give the MAP sensor a more balanced and stable reading. The idle valve definitely did heaps to the idle quality of the car with the A/C switched on or off. We could basically almost have the idle at a fixed RPM and the Hondata KPro did all the work to cope with the for A/C cutting in and out.
With this setup, the S2000 runs like a stock car!! This is very much to the contrary belief that quad throttles are very difficult to tune and have problems idling.
Vacuum Tank
Hondata Intake Manifold Gasket
Standard unported cylinder head
Finished product
Dyno Chart
The dyno graph shows a big jump in power anywhere after 4,000rpm. The lower power is NOT a power curve of the stock car. In fact, it is a graph with the bolt on mods as mentioned in the first dyno chart but running on the standard ECU.
The higher HP graph had only 1 variable compared to the other. It had the Jenvey ITBs in place of the GruppeM intake (and with the right tuning to suit). If we can gain 40hp here over an already fantastic intake kit (GruppeM)… And since most intake kit makes about 10hp over the stock air filter… Can we say that we are getting 50hp over the stock setup??? Can that even be true? Just an induction setup change (along with the exhaust and ECU of course) and we are getting 50hp!?!
I feel dizzy just thinking about it. Or is the dizziness a result of the heavenly orchestra of the Quad Throttles.
Now that I have seen these results and the cost involved in producing them, I begin to wonder why Honda did not make these a standard issue for all the S2000s. Hmmmm….Maybe the Perfect just got more Perfected
- We also carry ITB's for your B and H series as well as K series
- please give us a call for pricing
-Emerald Performance
Jenvey Dealer
(954)682-7281
Were located in FT Lauderdale , FL
Junior Member
Joined: Aug 2009
Posts: 136
Likes: 0
Re: Jenvey ITBs for 2008 S2000 with DBW
How much for these individual motors
B20/Vtec Turbo (And do u offer a Plenum? if not i'll make one)
LS/Vtec Turbo
GSR Turbo
TYPE R Turbo
you can post the price here or PM em, I wanna try some ITB's out and this is the first clear case i've seen where ITB's Made MORE horses. First "CLEAR" case.
B20/Vtec Turbo (And do u offer a Plenum? if not i'll make one)
LS/Vtec Turbo
GSR Turbo
TYPE R Turbo
you can post the price here or PM em, I wanna try some ITB's out and this is the first clear case i've seen where ITB's Made MORE horses. First "CLEAR" case.
FSAE
Joined: Jan 2002
Posts: 5,495
Likes: 1
From: Drinking Beer, UT
Re: Jenvey ITBs for 2008 S2000 with DBW
Search the archives for Tbone. He had significant gains everywhere on his 2.0L B using Jenvey 48's with 100mm stacks.
DonF has a set that he would use on customer motors on his engine dyno to show off.
Hayward Performance also sells Jenvey products.
DonF has a set that he would use on customer motors on his engine dyno to show off.
Hayward Performance also sells Jenvey products.
Junior Member
Joined: Aug 2009
Posts: 136
Likes: 0
Re: Jenvey ITBs for 2008 S2000 with DBW
Search the archives for Tbone. He had significant gains everywhere on his 2.0L B using Jenvey 48's with 100mm stacks.
DonF has a set that he would use on customer motors on his engine dyno to show off.
Hayward Performance also sells Jenvey products.
DonF has a set that he would use on customer motors on his engine dyno to show off.
Hayward Performance also sells Jenvey products.
Thanks guys!
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