Ok, first off, the mod list.
47# stage 3 turbo less thank 1k miles
ported manifold with DCR ramp mod
PTP wga 20psi
6 an returnline 43.5 rising rate 1:1
6 an feed line with bottle neck fix
walbro 255 fuel pump
fuel pump re-wire
RC750cc injectors
MSD 8.5 wires
NGK 1 step colder plugs (less than 200 miles)
stock pcm reflashed via DSP + turbo666
3bar map/tip
3" intake/ catless exhaust/o2 housing
Griffen BFMIC
ported intake manifold + throttle body
(i think thats all that matters)
ok the car drives perfect under normal driving, but under WOT as soon as 4krpm hits the car has no power, it still holds boost at 20psi a/f at about 11.6/7
it seems like it hits a wall, this just started, and the exhaust makes a CRAZY loud rattle noise as soon as the car loses power. (i will try to take a vid soon)
the car dynod at 347whp with no issues, this just started after I put the ported i/m t/b on.
what we have tried to diagnose/fix to solve this
put stock i/m t/b on - no fix
change wires - no fix
change plugs - no fix
regap plugs - no fix (gapped at 30 now)
change coil pack - no fix
Compression test:
Cyl 1: 145
Cyl 2: 150
Cyl 3: 150
Cyl 4: 150
then we decided to do a bottle neck fix and fuel pump rewire - no fix
we put the gauge for the fuel pressure on the windshield, the car is holding fuel pressure fine, and under wot is at like 63 (1:1) so everyhting with fuel seems ok, and the car is idling fine and throwing no CEL codes.
please help, we are lost
