So my previous best was 470rwhp at 24psi on race gas. Since then I added, AEM EMS, 272 BC cams springs and retainers, KSracing intake manifold, 3" piping, q45 tb, 680cc injs (was 550cc), etc.
I'm still on my little 61 turbo.
So last night I had no problem hitting 471rwhp/417ft-lb on pump gas, 18psi, revving all the way to 7400 rpm. That's just as good on pump gas as I previously did on race gas.
then
? rwhp/540ft-lb on 110/93oct mix, 28psi. It went lean as soon as we hit 5000 rpm. The walbro 255 finally got maxed out. We think we would have done 600 rwhp if we could have kept the fuel pressure up and revved it into the 7000s. We did actually hit 499rwhp which is awesome for only 5000rpm.
My plan is to run a Bosch 044 pump inline with the Walbro and -6 lines. I almost have this SP61 maxed out then I'll go with a 70.
Dennis
Dynojet readings:
I'm still on my little 61 turbo.
So last night I had no problem hitting 471rwhp/417ft-lb on pump gas, 18psi, revving all the way to 7400 rpm. That's just as good on pump gas as I previously did on race gas.
then
? rwhp/540ft-lb on 110/93oct mix, 28psi. It went lean as soon as we hit 5000 rpm. The walbro 255 finally got maxed out. We think we would have done 600 rwhp if we could have kept the fuel pressure up and revved it into the 7000s. We did actually hit 499rwhp which is awesome for only 5000rpm.
My plan is to run a Bosch 044 pump inline with the Walbro and -6 lines. I almost have this SP61 maxed out then I'll go with a 70.
Dennis
Dynojet readings: