Thread: high egt, i'm worried... or stupid

ive been noticing for a while now that my egt varies between 1500F and 1600F degrees when im cruising on the freeway. cruising at 75mph, the egt shows 1500F or just under that. if i accelerate even further, say to 80 or 85mph, the egt hits or comes pretty close to 1600F. if i set the cruise control at 75mph and let it pull a huge hill, my egt will hit or go past 1600F. im wondering if this is normal or not. i have a walbro 255 and no pressure regulator. boost is set to 14psi. the egt probe is on the #1 exhaust runner, around 3 inches away from the exhaust flange. i logged with justin the other day and it showed that the timing was pulled way back. please help! not to sound like a newb but is my engine going to explode soon?, haha.

OH Man, You're F'd in the A! No, just playin.

You're overrunning your fpr by running such a high pressure pump. I saw lean conditions in that scenario as well and even with a maft/safc its super difficult to tune out just a pump with no afpr. I personally think you should take out the pump unitl you get an afpr to turn the pressure back down. 1600? isn't too bad, but anything past that and you better know what you're doing. Logger and fuel control?

Manweezee

That's why I couldn't figure it out either when I had just a pump, theoretically more fuel then air = lower egt temps. Then I read about pre-ignition due to running too rich, causing knock, then causing a hotter burn through the exhaust. There were several threads about it in Tuners and Talk. I just assumed that had to been the problem then got an afpr. After that it went away :)

Foosheezee

im still somewhat baffled as to where i go from here. the 255 is going to stay in there since i cant find the original. so would my best bet be an afpr? if so, what brand would you all recommend?