My R32 GTR is pretty much stock except for: Nismo front pipe, catco ceramic highflow cat, apexi n1 catback, K&N panel filter, adj. cam gears (set for more midrange torque), Gizzmo MS-IBC
Compression results (psi, starting from cyl #1 to #6): 175,175,165,175,175,175
I would have expected about 220-250kw at the rears with these mods, but only getting 199kw at the rears with 14.7psi.
Boostworx said they found a leak at the inlet manifold gasket and it explains the low power, but I've been unable to find the leak myself and a mechanic who works on Skylines couldn't find the leak either.
If the timing belt has skipped a tooth, can this also explain why I'm down on power?
Another thing I thought of is K&N panel filter oiled nature, I brought it new and have never oiled it since it comes out of the packaging already oiled, could there be oil on my AFM causing the loss of power?
Any ideas I haven't thought of?
Forgot I'm running Nistune, with a fairly safe tune.