Detonated piston & blew head gasket. Now what?
#13
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I don't agree with the 32* being too advanced, unless the stock Vortec dinky cam and decent compression.
Experiences may vary.
Experiences may vary.
#17
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I've come across articles in the past I read for some reason or another and most articles/forum post seem to be btwn 30/32 total. I never dug into why however those total advance numbers would always seem to pop up. Does it make sense to me without researching it. NO. Are the combustion chamber on those designed differently that makes some magic prespark or something? Only vortec heads I've run were/are on gm trucks with 89 octane. I'm not agreeing or disagreeing with anyone on the subject rather curious.
#18
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I ran a 350 with a hot cam and forged flat tops. Had a 650 demon on it. 32* total timing and it was all in by 2500 rpm. Ran a 21 mirage on a 1.65 ratio drive. Turned around 5600 rpm. Never had a minutes trouble except for the occasional broken Alpha. Same engine is still running in my buddies boat today.
Last edited by 87MagnumII; 08-23-2016 at 09:49 PM.
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I ran a 350 with a hot cam and forged flat tops. Had a 650 demon on it. 32* total timing and it was all in by 2500 rpm. Ran a 21 mirage on a 1.65 ratio drive. Turned around 5600 rpm. Never had a minutes trouble except for the occasional broken Alpha. Same engine is still running in my buddies boat today.
Last edited by Gannz; 08-23-2016 at 10:29 PM.
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Previous photos of the heads were after a little cleaning and a couple passes with a surfacing stone to knock the carbon off. Here's one untouched except for a quick wipe with a rag. Didn't do anything but stick to the carbon and make it whitish.
Here are plugs 2, 4 6, & 8, in order...
And 7, 5, 3, 1 in that order...
And here are the piston tops, untouched...
And, yes, I will check the head surface. Just need to track down my straight edge and feelers.
Here are plugs 2, 4 6, & 8, in order...
And 7, 5, 3, 1 in that order...
And here are the piston tops, untouched...
And, yes, I will check the head surface. Just need to track down my straight edge and feelers.
Last edited by Gannz; 08-23-2016 at 10:28 PM.