b20vtec losing power??

[FLounder]

the background info:
my integras got a b20z block with b16a head, stock internals on the bottom and the head has springs, reatainers and just some GSR cams for now.
other than that is just bolt-ons... cat back exhaust with test pipe, short ram intake, type R throttle body

so the car isnt all that fast, although it runs excellent, like it came from the factory this way even. no CEL, purrs like a kitten. i just put a 4 into 1 stainless header on it and it feels like it lost power compared the oem cast iron POS manifold

first im wondering is it the ecu holding the motor back?... it is just a stock p28 (i think they are for single cam vtec) and it hits the rev limiter so soon.

also wondering why i would feel a loss in power after adding this header?

 

[Dark93DX]

first im wondering is it the ecu holding the motor back?... it is just a stock p28 (i think they are for single cam vtec) and it hits the rev limiter so soon.

uh....are you kidding me? a stock P28 running a B20vtec...

 

[FLounder]

ok yeah so thats what i was thinking was the main problem... i just bought the car like this a couple weeks ago.

so i just talked to xenocron, the guy was real helpful.... now waiting for my chipped ecu to arrive

 

[Dark93DX]

Just FYI, I wouldn't raise the redline above 7K on the ECU on a stock b20 bottom end either.

 

[FLounder]

i have heard 8000 rpms was the limit.... 7k seems so low!

i intend on getting a skunk2 intake manifold, stage 2 cams and cam gears very soon and then getting it tuned on a dyno. would i be able to safely make power past 7k with proper tuning? or is it that the b20z block just doesnt take the revs?