Also altered the Y pipe with the flowmaster Y250300 collector that I recommend for anyone merging 2 exhaust pipes into 1.
I had to run the duty cycle on those 305 injectors very high to support this engine and recommend the 350 injectors at 18psi route for a lower duty cycle. So since we couldn’t return the 454 injectors the 305 injectors were put back in and I shipped them out the 18 psi spring. Don’t know what the issue with the 454 injectors was but ran terrible. We found some AC Delco 454 injectors brand new and so tried to use that instead of running the 350 injectors at 18psi since we had to change the 305 injectors anyway and well that didn’t work out. Needless to say it didn’t run well with stock fuel system and chip when it arrived.įirst upgraded the fuel pump as that’s mandatory on all decent performing TBI builds.
They got a customer in with a TBI Camaro with a ZZ4 355hp 350 crate engine installed. I have been working with HK Dyno in Van Nuys California for a few years now.
