cadebytiger
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| posted on 10/5/07 at 11:50 AM |
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cam timing
Re-built our engine a while ago now and set the cam timing with a dial gauge.
The car seems to run well but i am thinking of getting the ignition timing set on a rolling road. Should i get the cam timing set too?
Thanks again
Rupert
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NS Dev
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| posted on 10/5/07 at 12:01 PM |
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If you have a vernier pulley then you might as well while you are there, could be worth a couple of hp even if you are close.
Retro RWD is the way forward...........automotive fabrication, car restoration, sheetmetal work, engine conversion
retro car restoration and tuning
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snapper
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| posted on 10/5/07 at 12:09 PM |
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Even if you have timed it up as specified, engines are all a little different and swinging the cam can make a good difference. I think a good rolling
road would be able to swing the cam and the spark timing to good effect
Just make sure once its all set that you record and mark the best positions incase you have to take anything apart in the future.
I eat to survive
I drink to forget
I breath to pi55 my ex wife off (and now my ex partner)
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cadebytiger
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| posted on 10/5/07 at 12:26 PM |
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Well that cleared that up. 
Emerald have said that they would do ignition only for half the price of a full map run.. so £125. How does that sound? I think they know what they
are doing.
NsDev - Have you used wilcox in hinckley. Would they be able to map my Emerald? I guess i should just call them and see how much they charge.
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cadebytiger
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| posted on 10/5/07 at 12:26 PM |
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Well that cleared that up.
Emerald have said that they would do ignition only for half the price of a full map run.. so £125. How does that sound? I think they know what they
are doing.
NsDev - Have you used wilcox in hinckley. Would they be able to map my Emerald? I guess i should just call them and see how much they charge.
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britishtrident
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| posted on 10/5/07 at 12:56 PM |
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Cam timing has a much bigger effect on twin cam engines, on a single cam engine the overlap is fixed and altering the cam timing hasn't as big
an effect as you might think.
[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 10/5/07 at 02:40 PM |
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surely though if you get it slightly wrong you are trying to recompress the gas which should be flowing out the exhaust valve hense hampering
performance or the other way allowing some power to be lost down the exhuast (if it opens to early). This must be a very fine line
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MikeRJ
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| posted on 10/5/07 at 03:43 PM |
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Swinging the cam timing on a single cam engine a couple of degrees either way just tends to tilt the power curve a little, retarding tends to give
better peak power at expense of lower RPM and vice versa.
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