Joined
·
1,347 Posts
I've recently upgraded my turbo and injectors from a SP67 p trim .81 A/R and HKS 720s to a BL71GTQ and 880cc injectors, and the car is making less power at the same boost! I went from making 665whp unlocked with the 67 to 630whp with the 71 at the same boost level (31psi)! No knock on any runs...The car also consistenly made about 15whp on pump gas as well.
I've even tried running a bit more timing with the 71 with no success! (Running about 17deg peak torque and 19 to redline at 30-31psi) This was done on a dynojet (same dynojet for both) and about the same weather and altitude conditions. Fueling on both runs was low 11's A/F. Well I was thinking maybe the dyno wasn't telling all so I headed to the track and sure enough my trap speel fell from 139mph to 136!
Talk about frustraction!!!...here is my exact setup maybe some of you guys can give suggestions to help me bring back my power
The only things I changed were the turbo and injectors....
SP turbo kit 71mm Q trim .81 A/R
3" Midpipe and downpipe (may be holding back a bit)
Apexi N1 cat back
Stock motor with exception of HKS 264 cams and crower springs/retainers
AEM EMS
Striaght c16 for fuel
Dual walbros/HKS rail
Dual -6an fuel feeds
Denso 880s
Stock cooling system
SP Gen II built trans with PI 4k converter
Dual B&M Tranny coolers 1 w/ fan
No nitrous YET :stickpoke
Denos IK24s at .028 (no misfire)
Think thats about it!!
Help me bring back the power!!
Thanks in advance...
-Andrew
I've even tried running a bit more timing with the 71 with no success! (Running about 17deg peak torque and 19 to redline at 30-31psi) This was done on a dynojet (same dynojet for both) and about the same weather and altitude conditions. Fueling on both runs was low 11's A/F. Well I was thinking maybe the dyno wasn't telling all so I headed to the track and sure enough my trap speel fell from 139mph to 136!
The only things I changed were the turbo and injectors....
SP turbo kit 71mm Q trim .81 A/R
3" Midpipe and downpipe (may be holding back a bit)
Apexi N1 cat back
Stock motor with exception of HKS 264 cams and crower springs/retainers
AEM EMS
Striaght c16 for fuel
Dual walbros/HKS rail
Dual -6an fuel feeds
Denso 880s
Stock cooling system
SP Gen II built trans with PI 4k converter
Dual B&M Tranny coolers 1 w/ fan
No nitrous YET :stickpoke
Denos IK24s at .028 (no misfire)
Think thats about it!!
Help me bring back the power!!
Thanks in advance...
-Andrew