90tbirdsc
Registered User
ok guys, Im having some issue with my sc. Ive been told that Ive been expecting to much from it and im now im disappointed with the outcome but that is not the issue, I have something going on that me or my friends or my dad can figure out. So im going to in detail describe my setup and see if anyone sees a problem with it. Then ill describe a couple other things. Here goes:
The factory exhaust manifolds have been ported, I have 2.5 downpipes right off of the manifolds, they are the good mandrel bent ones (not the ones that the bends push in but are still smooth) they are very good flowing. Those go into a SCP resonator that is dual 2.5 in and single 3 exit, after the exit there is a pipe with a 45 degree bend and then the exhaust dumps. that's it for exhaust. Next is the intake, the filter is down in front of the front tire out of the engine bay, its clamped on a 4in pipe that feeds my LMAF, after the MAF is a 3.5-3 reducer and a 3in intake that goes to a 75mm Precision products TB and a magnum powers inlet and a ported late model with coated rotors that will peg the gauge at 10% OD, 3/4 raised top and then 2.75 FMIC pipeing, that goes into a 31x11x3 ic. the piping all has gradual bends and im using silicone couplers and t-bolt clamps on the sections that are not TIG weded together. im still using the factory return plenum and lower pipe. motor is all stock internals. I have a 255lph walbro fuel pump and 42# injectors. my wideband shows that im not short on fuel cause with my not perfect current tune it is 10.9-11.5 depending on the day. I have autolite xp 103 spark plugs gapped to .035 with screamin deamon coil pack and livewire wires.
the timing will randomly pull back to 12 degrees or 18 degrees but there is no difference in power no matter what it pulls back to which is confusing
from all my research ive done a setup like this shouldn't have a problem running low 14's or mid-upper 13's. but racing a car that is a consistent 13.6 I got walked on very badly (like I knew I would) like I might be able to run a low 15.
I have a starter tune from DD and me and him have improved it through email over the past week or 2
Also my supercharger is very quiet, I cant hear it over my exhaust and no one else can hear it outside/in front of my car/ down the road either.
anyone have any ideas? all help is appreciated.
The factory exhaust manifolds have been ported, I have 2.5 downpipes right off of the manifolds, they are the good mandrel bent ones (not the ones that the bends push in but are still smooth) they are very good flowing. Those go into a SCP resonator that is dual 2.5 in and single 3 exit, after the exit there is a pipe with a 45 degree bend and then the exhaust dumps. that's it for exhaust. Next is the intake, the filter is down in front of the front tire out of the engine bay, its clamped on a 4in pipe that feeds my LMAF, after the MAF is a 3.5-3 reducer and a 3in intake that goes to a 75mm Precision products TB and a magnum powers inlet and a ported late model with coated rotors that will peg the gauge at 10% OD, 3/4 raised top and then 2.75 FMIC pipeing, that goes into a 31x11x3 ic. the piping all has gradual bends and im using silicone couplers and t-bolt clamps on the sections that are not TIG weded together. im still using the factory return plenum and lower pipe. motor is all stock internals. I have a 255lph walbro fuel pump and 42# injectors. my wideband shows that im not short on fuel cause with my not perfect current tune it is 10.9-11.5 depending on the day. I have autolite xp 103 spark plugs gapped to .035 with screamin deamon coil pack and livewire wires.
the timing will randomly pull back to 12 degrees or 18 degrees but there is no difference in power no matter what it pulls back to which is confusing
from all my research ive done a setup like this shouldn't have a problem running low 14's or mid-upper 13's. but racing a car that is a consistent 13.6 I got walked on very badly (like I knew I would) like I might be able to run a low 15.
I have a starter tune from DD and me and him have improved it through email over the past week or 2
Also my supercharger is very quiet, I cant hear it over my exhaust and no one else can hear it outside/in front of my car/ down the road either.
anyone have any ideas? all help is appreciated.
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