High EGT with the wastgate off (open)
Hey,
I don't like my high EGT, the prob is in the 4th runner of my tubular manifold, very close to the engine port. I get 800C~ at cruise @ 100kph~ @ 40deg of timing, when I stop to check I can see the manifold+turbine is red hot. I was running 16afr and then dropped it to 14 just to check, the egt went down a little (700-750C) but was hitting 800C sometimes still... My idle EGT is 500-600C (normal ?) When I disconnect the wastgate actuator and run with no boost, I still get the same cruise EGT as before... Could be the manifold design is the cause and that is that ? Thanks ! |
Leaner is usually hotter. With a 16afr, you may need to run even more timing than 40 at cruise to have a complete burn before the exhaust leaves the head. It is also a bit dangerous to run lean because it is possible to melt pistons at lean cruise or to have them gall the cylinder walls. Just be careful.
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