Need hepl diagnosing a problem! very laggy SR

[ill_sil]

Ok first ill list all my mods.-14 t28 @11lbs-FMIC-SAFC-2-Soon to have a wideband!-SOHC MAF(new) running 6in 6out on the safc-SSAC manifold w/ turbo back 3" exhaust-timing is @ 15deg(but its a little jumpy)-running atmospheric BOV, Blitz super sound-all injectors and plugs are working (i unplugged one at time)and ive got new plugs and there gapped at .30 BKR7E NGK's

Now the problem Im getting alot of lag in power.it feels as if ive got a huge turbo or something! The powerband starts at 4000rpms and up,and if i give too much throttle it seems like it bogs down liek too much fuel or not enough!When i get on it (75 to 100% throttle) while its cold it seems to pop a little.The ceramic on my plugs are white.I tried to richen the the mixture little by little to see if that was the problem and it seemed to get slower!

I never checked my ECU to see if its throwing any codes, but i dont know how to even check it so that wouldnt help.

thanks , john

[Nismo_Freak]

Assuming you have a better fuel pump?

[fregisr]

what are you using in terms of increasing boost

[ill_sil]

sorry i knew i was forgetting a few things, yeah i have a walbro 255, and im using a MBC ball and spring, even when i was wasnt using it i would get the same symptoms, and it would only boost 6ish psi, so it was really slow.

[ill_sil]

and the boost goes up at about 3200 rpms and stays stong, it runs ok at 4000 rpms and above, so i dont think its a boost leak

[ill_sil]

could it be that my lower rpm's are way too rich?

[BLKTOPS14SR]

I have a friend with the same problem on a factory T25. His car won't start boosting till roughly 3,800 rpm and is really strong from there. We've yet to find the cause. Another friend has almost an identical setup and his boosts around 3,000 rpm.???? Good luck.