I see that many s2000 owners are inquiring about performance gains with basic bolt on parts. I dynoed my car many months ago but did not share my results. Rob at Speedquest dynoed my car on their DynoJet Model 224x chassis dynometer. Overall, I was very impressed with my gains. I have the following parts:

Apexi VAFC II
T1R cat back exhaust without test pipe version 1
AEM Cold Air intake V2

Note: my baseline dyno inlcuded intake, exhaust, and untuned VAFC II. I am estimating that my AEM V2 CAI gained around 2-3 hp and my T1R exhaust without test pipe gained around 7 hp give or take 1 hp. According to these numbers, my stock baseline would be around 189 hp.


With the tuning of the VAFC, each dyno increase significantly when he adjusted the settings. My vtec engagement point is set at 5800 RPM. Overall with all the parts and with tuning, I gained about 18 rwhp. With the t1r test pipe, it should yield an additional 5 hp or so.

http://www.speedquestperformance.com/

 

Gains look very nice.

 

Not bad at all!

 

Do you mind posting your VAFC-II settings? There is a library page listing VAFC settings for various configurations. It's helpful to see trends.
BTW - nice gains.

 

looks like you can drop your vtec engagement point a bit more

 

I'll try to get it up when I get a chance

 

Yeah, we actually tried to drop it a little more, but it lost power. The most efficient point was at 5800 for me.

 

Damn.. this car looses a lot of HP from the fly to the wheels! 42hp.. wow..

But nice gains for bolt ons! How does the butt dyno feel?

 

ya his dyno plot sounds about right...when i dyno'd with t1r 3mm exhaust with testpipe and tuned vafc i got 205whp 138 lbs of tq sae corrected and my baserun dyno was 190whp...t1r exhaust with testpipe gains about 10-12 whp combined and assume tuned vafc 5whp

 

Looking at that photo of your exhaust, you may want to adjust the fitment a bit further from your rear bumper cover or put some kind of insulation/spacer in there.
Ask me how I know..
Nice gains BTW!!