EGT's

[boro drift]

I was just curious to what other people's SR's are running for egt's. My 240 is the first gasoline powered car I have had a pyrometer in and temps seem high.

[Emperor_Tha]

may not be egt but it just a reference

this is with a laser thermometer. After 15 mins cruising on the interstate and 2 mins through regular street to my house. It read 680 degree f at idle. Its cast iron with no heatshield. Measurement were taken on top where the center of the inlet would be.

[boro drift]

I tryed that to and with my pyro at 600 my temp gun said 425 on a stainless manifold, which is probebly about right. I started this thread becaust I can bury my pyro at 1600 in 3rd gear at 6000 rpm.

[boro drift]

Doesn't any one run pyrometers these days?

[boro drift]

bump

[the converted]

I can bury my pyro at 1600 in 3rd gear at 6000 rpm.

That's way too hot. What's your timing set at? Usually you see that from it being to retarded or super rich ~10:1.

[boro drift]

I am still fighting the timing. I'm having a hard time getting it into timing mode. And, the idle goes to high when I unplug the tps. Shouldn't egt's get lower the richer the air/fuel ratio is on a gasoline engine?

[the converted]

Nope, the reason the egt goes up is because you still have fuel burning in the exhaust. Richer fuel is harder to ignite and has a slower flame speed, igniting it later has the a similar effect but is more dramatic because your loosing cylinder pressure so the fuel again, is harder to burn.

Get your timing dialed in before you melt a valve. Oh and make certain you have a perfect ground on the gauge to bare metal, none of the twist and tape **** as it really messes with the gauge.

[boro drift]

I'll check my ground and get my timing dialed this weekend and see if it helps. Thanks man.

[boro drift]

Well I finally got my timing dialed! And it took care of my high egt's. I, like many other people's threads I've read, could not get my idle low enough in timing mode to make adjustments. Finally, after some time tinkering, I backed the throttle stop screw off, and I was able to set the timing. Also my occasional 1200 rpm idle sitting at the stop light is gone.

Just wanted to elaborate for the people out there having similar problems.

Thanks everyone on this thread, for your advice. A.J.

[the converted]

I love doing timing on my AEM because I can just set the timing to flatline at whatever number I want. I'm glad that you got your timing straightened out and it probably drives a ton better now too.