Exhaust Temps. ?

What is a good range for exhaust temps.? I don't have any EGT sensor hooked into the header, I was using a temp. gun on each primary tube. Not sure about all of the engine information; other than it's a 10:1 static compression carburated 383. I will be able to get more info. about engine if needed. Just looking for some what of a range to be in, nothing real percise right now.

Thanks!!

EGT sensors are about the only way to check this and get information that's usefull.

If the headers are glowing orange, then you might be a bit too lean on the tune which is good because the motor needs more fuel than you thought it did.

Bret

glowing thinwall headers isn't alaways bad or uncommon.

could mean rich- gas not compeletely burned and burning in the primaries


does it have a tight lobe seperation? angle?

450 to 500 degrees F at an idle and 950 to 1000 degrees F at WOT during a 1/4 mile pass is the range I shoot for. Those temps are used for tuning for max power. There are other variables that can factor into the sampling of EGT's such as adjusted altitude ie. air temp, humidity, barometric pressure and feet above sea level. Each engine builder will most likely have their own parameters for what they would like to see EGT's at in order to make power but still allow the motor to live.

glowing thinwall headers isn't alaways bad or uncommon.

could mean rich- gas not compeletely burned and burning in the primaries


does it have a tight lobe seperation? angle?

It could be rich if it has lots of gas going thru the intake and out the exhaust. I guess we wait and see what he says.

From what he said doesn't really sound like he has EGT probes in the exhuast.

Bret

450 to 500 degrees F at an idle and 950 to 1000 degrees F at WOT during a 1/4 mile pass is the range I shoot for. Those temps are used for tuning for max power. There are other variables that can factor into the sampling of EGT's such as adjusted altitude ie. air temp, humidity, barometric pressure and feet above sea level. Each engine builder will most likely have their own parameters for what they would like to see EGT's at in order to make power but still allow the motor to live.

If you are running at 1000* you are giving up a lot of HP. 1300-1400* for just a flash during the run will let you see more HP.

how hot the headers are isn't a good indication of egt imho. too many variables from header material, coating, contruction, ambient, where you measure etc.

our turbo racecar sees around 600* ourside the wrap

Thanks for the input; I'll wait until we have an EGT setup on the car, before hassling for knowledge again. Mean while I'll compline my own useless data with the temp. gun.

Thanks again !! :thumb: