I have a 97 cobra, we recently put it back together and I am scheduled for a dyno appointment at the end of this week; however we ran into a problem. I know I dont have a strong fuel system and that could be the problem but im not sure so I figured one of you guys could help so here goes,
The mods to the car are as follows:
Bottom end bored .030 over with forged internals
comp stage 2 billet blower cams with stronger valve springs now( not sure what kind or how strong came from comp as well)
ported short runner intake
D1-SC with 16 psi boost
SCT mass air meter
anderson power pipe
live wire plug wires with screamin deamon coil packs
and bosch v power plugs (2 steps colder than stock)
42 # injectors
walbro 255 in tank and a trex pusher pump
Now the problem:
Recently installed the trex pump and took it out for a spin, the care breaks up real bad consistently around 6000 rpms so i figured maybe it was the lack of fuel but the trex pump didnt help at all. My buddy seemed to think it sounded a little too consistent to be detonation and suggested it was a limiter put on the car from the last tune that was on it which was for p600b procharger with 5 psi on a stock car with 42 # injectors. He drove it and took it to 6000 rather easily and it sure sounded like a limiter but then it seemed almost as if the car backfired. After that the car wouldnt run right and the oil pressure and voltage gauges were going crazy. The oil pressure would read good pressure for a minute but as soon as we drove it would drop to 0. When the car backfired it did blow the intake tube off. Now the car wont run quite right and I cant figure out for the life of me what it is, the battery is good the spark plugs were good I have plenty of oil....hopefully you guys can help I apologize for the lengthy post
james
The mods to the car are as follows:
Bottom end bored .030 over with forged internals
comp stage 2 billet blower cams with stronger valve springs now( not sure what kind or how strong came from comp as well)
ported short runner intake
D1-SC with 16 psi boost
SCT mass air meter
anderson power pipe
live wire plug wires with screamin deamon coil packs
and bosch v power plugs (2 steps colder than stock)
42 # injectors
walbro 255 in tank and a trex pusher pump
Now the problem:
Recently installed the trex pump and took it out for a spin, the care breaks up real bad consistently around 6000 rpms so i figured maybe it was the lack of fuel but the trex pump didnt help at all. My buddy seemed to think it sounded a little too consistent to be detonation and suggested it was a limiter put on the car from the last tune that was on it which was for p600b procharger with 5 psi on a stock car with 42 # injectors. He drove it and took it to 6000 rather easily and it sure sounded like a limiter but then it seemed almost as if the car backfired. After that the car wouldnt run right and the oil pressure and voltage gauges were going crazy. The oil pressure would read good pressure for a minute but as soon as we drove it would drop to 0. When the car backfired it did blow the intake tube off. Now the car wont run quite right and I cant figure out for the life of me what it is, the battery is good the spark plugs were good I have plenty of oil....hopefully you guys can help I apologize for the lengthy post
james