>I'm looking for some information about how to get rid of the pre ignition
>on my 1963 TR4. I have bought the 5 new distibutor weight springs
>from MOSS's but they didn't give me any instructions on getting the best
>set up. Has anyone any experience of solving this problem ? I know
>that pre-ignition can sometimes be due to an overdue de coke to the
>cylinder head, but this has been done. I hope that the solution
>lies in the use of two of the 5 springs that I have been sent, but how to
>get the best set up - I don't know !
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The only way to alleviate the problem is to either reduce timing (retard)
or use higher octane fuel. - the springs and weights will only change the
RATE or RPM at which advance will occur, not total advance. This might
help only if the detonation occurs at low engine speeds and only if they
slow the advance at that speed.
Barry Schwartz (San Diego) bschwart@pacbell.net
72 V6 Spitfire (daily driver)
70 GT6+ (when I don't drive the Spit)
70 Spitfire
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