Haven't rn ours yet, but should do in about 6 weeks, so if you haven't sorted it by then we can compare numbers, Rather concerning though, I was hoping for a good 350bhp on less boost than that.

What's the exhaust like, and what kind of timing advance did you end up at?

 

My bad, no FB at work either, never saw the curve. But S2000junky confirms big difference in dyno's.

As far as an exhaust "fixing" the issue check out this thread:

https://www.s2ki.com/s2000/topic/710...erent-exhaust/

 

Davids Dyno is one of the most pessimistic dyno's in the world. You needed to know what power you had with a stock engine.
If you've got the supercharger geared for the 9100 rev limit then if your pipework and ic are good you should see close to 16psi at the limiter. Your power curve looks like the vtec is coming in way to late as you have no midrange power. 10:1 compression should allow pretty reasonable advance at the top end on our 98 oct Ron. The torque and hp curves should be much fatter than you have. Power will only nose over at the top end if the ignition is backed right off. I hope this helps. My complete Supersport kit is limited to 10-12 psi and I would see on Davids Dyno about 70% gain in peak power. On a Dynojet over 100%.

 

Im in the uk with the supersport tts kit using the same charger as you, but on 750cc injectors. My car produces 410bhp on a dynodynamics dyno.
I dont think the exhaust affects it much as i use my standard back box with a decat pipe and j's manifold.
With the engine being in a different car im assuming youve had to have a custom exhaust made all the way up. So it might restrict it.

 

Welcome to the boards. Love your car btw.

I am on an old school NOVI1000 blower at 11psi with 2.2L F22 motor. My power SAE corrected specs are:

350hp/220tq on DynoJet so on DynoDynamics I could be at 320hp maybe?

Don't worry about exhaust, s2000 has stock piping of 2.25" I believe so unless yours is much much smaller than that then, I wouldn't worry. I say unbolt your exhaust and run it right from the header during you next dyno pull to see how much power you'll free up.

Also, stock s2000 is at 11:1, you are at 10:1. This cost you power and you now have to run added boost to compensate.

I don't think there is anything drastically off with your power figure. As you can tell my opinion is different from others but it's is, just an opinion.

 

An update to this old thread as the car was back on the rolling road today.

After my original post it made 373bhp and 237lbft...

Then I changed the exhaust over the winter and today it made:

364Bhp and 306lbft, which seems odd to me! (however, they did update their rollers...).

 

I did a lot of research on chaging the stock exhaust and it seems for supercharged cars the best thing you can do is leave it on or go for a mugen exhaust which uses similar sized piping.