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Jul 21, 2008 12:39 am
Jul 21, 2008 12:39 am
Subject: Re: 2L engine problem
I have now rebuild my engine and installed new camshafts from the Club (with more rounded cams as opposed to my previous camshafts which had very flat lobes - see the picture I uploaded earlier in this discussion). Everything is now perfectly set with the recommended 24 degrees valve overlap and the problem of petrol spit-back through the carbs has completely disappeared. It was indeed simply a matter of the wrong combination of cam profile/downdraft cylinder head/valve overlap.
I have now rebuild my engine and installed new camshafts from the Club (with more rounded cams as opposed to my previous camshafts which had very flat lobes - see the picture I uploaded earlier in this discussion). Everything is now perfectly set with the recommended 24 degrees valve overlap and the problem of petrol spit-back through the carbs has completely disappeared. It was indeed simply a matter of the wrong combination of cam profile/downdraft cylinder head/valve overlap.