Got my engine running for the first time last night with the exhaust fitted, so had it running for a while and it sounds gooooood

Might sound a bit daft to you "seasoned guys" but need to ask as I am not sure on this......after having it running at high revs for a bit the manifold started to glow red - is this normal? or might I have a problem with timing (advance?), too much fuel or something. For info on what I am running it is a 2 litre pinto with stage 3 head, twin 45 webers with a lumenition unit and sport coil (stainless manifold...now a tad discoloured.)

It just unerved me a bit as I have not seen this before so any confirmation one way or the ther would be great

Also seem to be getting sparking between the HT leads and manifold when I blip the trottle to high revs - is this just likely to be degraded leads or is it an indication to something else.

Thanks in advance!

red manifold is good

sparking is not so good

Manifolds will glow red if you a revving the engine hard. But it can also mean you are running with a touch too much advance. Probably 16deg would be about right, really depends on your camshaft.

You need to clip the HT leads up to the rocker cover, either with cable ties, or the proper clips. You will get some leakage of sparks to close metal as the voltages are so high. But a good set of leads should minimise this. You can often see it at night, or if the air is damp.

David

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Originally posted by flak monkey
Manifolds will glow red if you a revving the engine hard. But it can also mean you are running with a touch too much advance.

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Originally posted by MikeRJ

Retarded ignition timing is the usual culprit for high exhaust temperatures!

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