Alright guys. To start off, I have a 2002 Honda S2000 with about 63,000 miles on it only. It's been Supercharged since 20,000 miles and put out only 293whp with a 3.9" pulley (8 psi). Just yesterday, I took it to the shop with a 3.2" Pulley, and was expecting somewhere around the 350whp mark. Well, I came up short. By a lot!!! I don't know if my S2000 just has a weak motor, or if theres something wrong. We did run into some issues with the stock map sensor only reading up to 10psi. And i think the fuel pump was running low on voltage as the RPM's went up AND not supplying enough fuel past 7k. They ordered a omni 2.5 bar map sensor, and i am having my fuel pump rewired. Hopefully those were the only issues that was holding back my power. Getting it re dyno with everything fixed tomorrow. Crossing my fingers i'll at least be in the 340whp area. This is all done on 91 oct pump gas.

Mods

2002 S2000
Stock and un-open motor.

-Comptech supercharger (N1000)
-Comptech reinforce diff
-spearco front mount heat exchanger
-NGK spark plugs
-SOS 3.2" pulley
-Mugen Pressure plate
-ACT full face clutch
-Mugen 2.2 header
-tanabe racing medallion exhaust system
-test pipe
-AEM EMS V1
-RC750cc injectors
-catch can
-AEM fuel pressure regulator
-stock fuel pump......Errrrr
-Amuse rep front lip

It made 318whp and 200wtq
You can see that the power levels off at around 8000rpm. it was running lean. I'm sure I can make more power still though. What could be robbing me of power??????? ERRRRR>>>.....


Installed walbro 255 fuel pump and unbolted exhaust system from the test pipe. Made 352whp.


With exhaust system semi bolted back on. Tanabe Racing Medallion Dual. 63mm divided to 2 50mm duals. With the walbro 255 fuel punp. Made 330whp


Final Tune on 3.2" pulley and 3" single exhaust. 355whp 215wtq


VIdeo Added. QUICK pull with 330ish whp.
It is now at 355whp. So it's a bit quicker now.
http://www.youtube.com/watch?v=z-sHkcjP56c

 

Belt slip.

once you fix that issue you should easily hit 330-350 at redline.

 

Yeah. It was slipping. But we've tighten it 3 -4 times. It was showing a little over 12psi of boost.

 

Im running a 3" pulley at 14-15psi putting down 405whp. So yeah my guess would be around 350whp when u get your issues fixed and a good tune! Good luck oh im also on 93 pump.

 

I hope I get 350whp. I'm going to be so sad if I don't break 340whp.

 

WIth a pulley that small its an issue. The less surface area on pulley(the smaller the pulley), more chance of slip. I'd go to a gatorback belt to help eliminate slip. Power should continue to rise all the way to redline. The higher the rpm, the more boost.

 

Post up the afr graph. Did they not know if you were running lean? I'm sure they did. Looks like belt slip there.
You're still on stock map sensor and running 12 lbs? I know it has issues over 10 psi so definitely replace that and retune.

 

Yeah, they said I was running lean up top, and that I need a new map sensor. I'm getting those issues fix tomorrow and hopping back on the dyno. And yeah, I always thought it would make more power the higher the revs go. Wish me luck guys. Chasing 350whp.

 

And I am running a gator belt too.

 

Moddiction, I think the graph below the dyno is the afr graph.