#67999, "Dyno results and question" Mar-30-04 12:45 PM by GorkoRacing
Ok so i dynoed my car finally. I turned up the boost from 4psi to 8psi finally as well. I have a star stage 2 etrim bb kit. My fmu quit working after a month and i just put on a sfmu is why i havent turned up the boost till now. well im running rich apparently in lower rpms but it leans out in higher rpms and caused me to detonate on the dyno as you can see on my dyno sheet. I'll try and get my a/f readings to post up here too. My question is how do i go about fixing this as im not sure how to tune the sfmu really? Can i adjust it to fix this problem? I have an safc as well that ill be hooking up soon. I am running the sfmu with the 12:1 disc and the hardspring in it btw. Also what do you all think about the numbers?
#68007, "RE: Dyno results and question" In response to Reply # 2
numbers look good for a 8psi (or so I think). and definatly be careful on the dyno.. cars always seem to run a little leaner on the dyno and some go kaboom.. as yours nearly did. My best guess to this is that the dyno drums weigh so much that they actually put a higher strain on the motor then the car would by driving around pulling it's own weight.
sorry i can't help you with the sfmu stuff.. i don't know anything about those.
#68077, "RE: Dyno results and question" In response to Reply # 3
Originally posted by Breezio and definatly be careful on the dyno.. cars always seem to run a little leaner on the dyno and some go kaboom.. as yours nearly did. My best guess to this is that the dyno drums weigh so much that they actually put a higher strain on the motor then the car would by driving around pulling it's own weight.
I was thinking about this myself. I talked to the guy that was running it and he said it got up to somewhere between 13:1 and 13.5:1 AFR in the upper RPMs. While driving around, his turbo timer shows around 12:1 to 12.5:1 which should be a pretty good mix. I think old plugs are what caused him to detonate. Also, the SFMU needs to be adjusted. I think the boost screw is turned out so that it's stopping fuel around 87psi. It should be getting up to around 96psi or so. The base fuel pressure was also low by about 5psi. You didn't detonate at all from your house to the dyno, and you were in and out of boost the whole time. With it only doing it above 5-6krpm and only on the dyno, I agree with the too much load theory. Now fix your shit. Bitch.
Lets just say this... I'm over 100whp and soon to cross 200whp. Thanx 2GNT! Now if I could only learn to prove it.
nothing like driving with the windows down and the music low: i love hearing the turbo spool, swwwhhhttt!!!! thanks for www.kaptainmyke.com for the sig hosting
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