Am I running out of injector?
I recently swapped from a 3.125 pulley to a 2.75 pulley and have noticed that the car pulls hard at about 4000rpms and then seems to level off around 5000+. It never did this with the 3.125 pulley, it used to just build boost and power together. Now, it seems like the big surge comes on at 4k and dies at 5k. I used to see 10-11lbs, now I am seeing 15 at 5000rpms.
I have never had the car dynoed, so I don't know what my A/F is at.
Here's the combo:
S-trim (15+ psi)
38lbs Lucas injectors
Pro-M 80mm MAF with SC Tuning
FMU 6:1
Extrude Honed Cobra
70mm Tbody
Stage 3 ported TFS TW heads
Mild SC cam 217/222, .510 lift @ 114lca
Shorty headers- x pipe- Flowmasters with turndowns
I can't be sure that there is no detonation, it's too loud to hear, and my temp gauge is always super cold. (I have had other pingers and the temps usually skyrocket after detonation, I am not seeing this at all). I have a MSD-6 BTM and set the retard at .75-1
Any help is greatly appreciated.