slim Jim
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| posted on 5/5/07 at 08:14 PM |
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Pinto Engine First Time Running
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!
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nib1980
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| posted on 5/5/07 at 08:19 PM |
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red manifold is good
sparking is not so good 
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flak monkey
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| posted on 5/5/07 at 08:25 PM |
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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
Sera
http://www.motosera.com
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MikeRJ
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| posted on 5/5/07 at 08:57 PM |
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quote:
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.
Retarded ignition timing is the usual culprit for high exhaust temperatures!
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Andy S
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| posted on 5/5/07 at 09:21 PM |
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quote:
Originally posted by MikeRJ
Retarded ignition timing is the usual culprit for high exhaust temperatures!
Agreed - fuel still burning when exhaust opens - weak mixture or not enough advance gets my vote.
Andrew
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slim Jim
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| posted on 5/5/07 at 09:33 PM |
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Cheers guys, I can rest easy now that I know I just need to do a bit of tweaking - roll on the morning!!
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britishtrident
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| posted on 5/5/07 at 10:13 PM |
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To explain a bit about glowing exhaust.
If the ignition is too retarded the heat energy released by burning fuel dosen't get enough time to be converted into work on the pistons so is
rejected as waste heat to the exhaust, cylinder walls and pistons.
[I] “ What use our work, Bennet, if we cannot care for those we love? .”
― From BBC TV/Amazon's Ripper Street.
[/I]
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cadebytiger
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| posted on 6/5/07 at 12:24 AM |
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The good news is that if it is the exhaust manifold that is golwing and the fule is too retarded then you have more POWER to gain by setting it
right!!
Hope you find it!!
Rupert
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