Thread: Header Temperatures

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Originally Posted by mrrilla

I am just got done breaking in my new motor which is a 383 Tuned Port Injection. All the sensor data looked good, A/F ratio was right at 14.7 and water temp was around 200F.

At about minute 15 my stainless block hugger headers started changing color. At minute 20 at 2000 rpm, the headers were glowing red. I took a infrared thermometer to them and they were all within 15 degrees, around 375F.

My question.....What range are these headers supposed to be running at? Makes me think the motor is running lean but the 02 sensor says everything is good.

Any suggestions or comments?

In the old days before the A/F gauges where out there we use to run about 1,350 F right at the head where the exhaust bolts to the head it's self for circle track applications.
1,450F for drag engines.
I forgot to add this temp. is for good pistons like a JE and I would not recommend these temps. with a set of $100 hyper's.