Technical > Spud Miller's Cave

Exhaust temp questions

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Supercat:
We are still running rich with our car ,injected alcohol.
What is a ball park temp for the exhaust using a thermal gun to check temp.
We were at 214F. at the elbow( 3" from the flange) after a good warm-up in the pits this past week in Ohio.
Car ran well but as I said still rich.
Thanks for any info.
John

masracingtd1167:
How hot the pipes get when warming it up is really not much help for tuning . If you were taking egt's going down track I would say around 1100 ish but I don't really pay much attention to them . If it's not building heat during a run it's too fat !

GlennLever:
EGT's are hard to tune by, to fat and you are burning fuel in the pipe. It is better to read the plug after a run.

Supercat:
Before the racepak stopped working properly we were around 375-425F on the pass.
The reason I made the comment about the idle is, we are use to warming up the car when we had the smaller Nailhead in the car,it was much hotter at the pipes during the warm up.
We have the car ready to run at Orlando this week if the weather cooperates.

wideopen231:
mpt sure where you are reading but sounds funny.425 is way beyond fat. I would thing raw fuel coming out pipes fat. Like Bill said normally 1000 to 1100 depending on where you read and how setup is.

Maybe a call to Spud is in order here.If nothing else go to his site sign up and use his calculator,Maybe not dead perfect but it will get you real close. When get back from weekend call him about having system flowed.

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