I have a 88 T2 with a safc, racingbeat turboback exhaust, and a dynotune EGT gauge which is mounted in my DP right beside my O2 sensor. I am still running my stock injectors, but I do have a 255lph walbro installed. I have my safc going +4% from 3k to 8k on my rpm band,using the hi throttle map, which I have set at 99% throttle posistion. and on my low throttle map I have it set to 0%. Now just crusing down the highway I see egt temps around 650-680 celsius. Now when I goto WOT and boost to about 10psi for about 15 seconds my egt temps go up to like 780 celsius. Now I have done a s5 turbo swap on the car with a ported wastegate, and I am using a autometer a/f gauge which I know isn't the greatest or most reliable way of measuring ones a/f ratio, but the egt gauge I know is. Now the higher the EGT temps the leaner the mixture is right? and lower egt temps mean richer? So is what my temp is reading under boost/WOT ok? I guess is my question.

Not sure, but where in ohio are you at?

central ohio....near mansfield

well the egt interacts with the timing and the mixture. you can have it rich and too advanced or to retarded on the timing and the egts will be high.



mike

780 is pretty good. maybe a tad hot. I'd check you timming. and maybe retard it 1-3 degrees from stock since you are using a stock ecu with FCD I presume. that'll bring it down a bit and make it safer.



you probably can't go any higher on the S-afc. you injecters are probably nearing max. but hard to tell.

i'd tell you mine, but i still haven't tapped a hole for my greddy ETG. the gauge looks good enough in the pod right now, i'll tap a hole for the sensor once i get my RB exhaust...

but is it the hotter the temps the richer, and the lower the temps the leaner?

other way around. the extra fuel cools the mixture down, rich = cooler. lean = hotter.