prawnabie
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| posted on 25/1/09 at 06:18 PM |
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carb popping
Hi
What are the likely reasons to cause spitting back though the carb at about 2000rpm?
I have tried the timing from 10 to 14 btdc and it seems the same. Happens when hot or cold!
Engine specs..
1700 flow
Kent 234 cam
twin 40 webers
Thanks
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jacko
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| posted on 25/1/09 at 06:21 PM |
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Air leak around the manifold ?
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philhoward
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| posted on 25/1/09 at 06:35 PM |
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Mixture too weak?
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prawnabie
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| posted on 25/1/09 at 06:56 PM |
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Carbs were jetted for a 1600 + 60. I thought they would be good enough for the 1700.
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thunderace
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| posted on 25/1/09 at 07:03 PM |
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try a colortune on it.sounds like its jetted wrong or timing. or fuel mix.
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prawnabie
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| posted on 25/1/09 at 07:05 PM |
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okay thanks!
I take it if its running lean then the plugs will be clean? The engines virtually just been rebuilt.
Might just take it somewhere tbh and get it set up properly - thought I could iron out all the majopr creases before hand though!
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omega 24 v6
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| posted on 25/1/09 at 07:11 PM |
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2nd vote for lean. Or ign timinig/valve timing out.
If it looks wrong it probably is wrong.
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MikeRJ
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| posted on 25/1/09 at 07:36 PM |
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quote:
Originally posted by prawnabie
Carbs were jetted for a 1600 + 60. I thought they would be good enough for the 1700.
Did the 1600 have the same cam?
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prawnabie
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| posted on 25/1/09 at 07:42 PM |
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I don't think so, Im sure it was a standard gt cam in the 1600 + 60
Thanks
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