10.8's ALL night long! 72mm tapped out?!
10-09-2011, 03:08 AM
#1
10.8's ALL night long! 72mm tapped out?!
So I went for big tonight. I was having issues with turbo only making 15psi so I added another small spring inside my other spring in my wastegate. Well, this seems to get to about 19psi and it drops to about 17-16 above 6k. Not sure what the hell is going on. I'm going to talk will Rob tomorrow at modular turbo as I want a 800HP turbo as it's advertised and I need a stable 20+psi for that to happen.
That said, i'm happy with the power at this boost. The 76GTS went 10.92 at 18psi so this seems to be dead on. It's actually a NPB off nitrous and NPB in the 1/8th even over a nitrous pass that went 10.74 1/4 on the 76. The second and 3rd run I locked 3rd gear, thats why the MPH was better but each pass was all about the 60's as the HP stayed the same. I tried turning the boost controller up each pass, but boost didn't raise. Could have added timing, but thats not my thing. I'm a big boost fan.
Airfuels were a healthy 11.0-11.4 all night.
Anyways here's 10.8's. Tried launching at 3500,3400,3300. Also got air pressure in the slicks down to 12.5psi cold. Still spinning tires though, not sure what else to try.
Turbo GMC Sierra RST 08Oct2011 - YouTube
That said, i'm happy with the power at this boost. The 76GTS went 10.92 at 18psi so this seems to be dead on. It's actually a NPB off nitrous and NPB in the 1/8th even over a nitrous pass that went 10.74 1/4 on the 76. The second and 3rd run I locked 3rd gear, thats why the MPH was better but each pass was all about the 60's as the HP stayed the same. I tried turning the boost controller up each pass, but boost didn't raise. Could have added timing, but thats not my thing. I'm a big boost fan.
Airfuels were a healthy 11.0-11.4 all night.Anyways here's 10.8's. Tried launching at 3500,3400,3300. Also got air pressure in the slicks down to 12.5psi cold. Still spinning tires though, not sure what else to try.
Turbo GMC Sierra RST 08Oct2011 - YouTube
