Pre-detonation

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Pre-detonation

Post  Super Snake Steve on October 25th 2013, 7:25 am

On 429/460 when pre-detonation happens dose it happen on all cylinders or dose firing order have anything to do with it because 7&8 fire next to each other # 7 would show Signs of pre -detonation

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Re: Pre-detonation

Post  IDT-572 on October 25th 2013, 4:24 pm

No it's a combination of several factors, oil contamination, sharp edges on combustion chamber surfaces, (piston and head), lean cylinder, (this can be on 7&8 because one fires after the other off the same corner of the manifold, (single plane only). Timing difference because of a reluctor tab bent in the distributor.

It goes on and on.

A good sealed up engine with a good tune and compression where it needs to be is the answer.
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Re: Pre-detonation

Post  Super Snake Steve on October 25th 2013, 4:31 pm

Thanks back in 85 no internet I was 20 and I never could get to tune right and I think the main reson was I used the dist. Out of my 79 351 and never had it set right to point that the best way I could get it to run was with no vacuum now I found out that they have different adv. plate 18 13 and so on so when I get it back together ill get a dist from Scott that's set up for my app thanks for the info

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Re: Pre-detonation

Post  IDT-572 on October 25th 2013, 4:33 pm

Sure, just make sure where your total timing is and what rpm it is all in by.
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Re: Pre-detonation

Post  Super Snake Steve on October 25th 2013, 4:37 pm

Yep from what I've read all in at3k

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Re: Pre-detonation

Post  Larry Williams on October 25th 2013, 6:20 pm

IDT-572 wrote:No it's a combination of several factors, oil contamination, sharp edges on combustion chamber surfaces, (piston and head), lean cylinder, (this can be on 7&8 because one fires after the other off the same corner of the manifold, (single plane only). Timing difference because of a reluctor tab bent in the distributor.

It goes on and on.

A good sealed up engine with a good tune and compression where it needs to be is the answer.    
a reluctant reluctor I have heard of those
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