Exhaust gets REALLY warm, mild 4AGE build running MS

[Gnugfur]

Jan Pedersen Wrote:Bean Bandit: There are no backfires. And we did check the other things you mention. However we only looked at two plugs so it might be one injector thats bad. This is next up...

Ivan/Gnugfur: We tried without the rear part of the exhaust and it still got warm. We checked the front peice before mounting it saturday.

its a matter of flow restriction contra the aspect of what the engine delivers.
I would start from replacing the header and work my way backwards.

Other than that, since your certain the timing is correct. I really cant imagine other possibilities than a flow restriction, lousy metal quality or valve problems.

Valve problems should be easy to determine with a compression measurement kit.



A "Mickey Mouse" solution to determine if it keeps its compression is spraying fog of thin thin oil into the sylinder before you mount the compression kit.

Also, check the physical placement of both cams.

edit : If you've been running "wrong" A/F sooth will build up within your exhaust.

Also, are you running a cat on your original exhaust?

edit 2 : went over your project thread. Could find any pictures of your exhaust setup. But i got a theory. Are you running the 16v 4AGE exhaust on your 20valve setup?

edit 3 : What are the valve clearances? Compression rates?