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After alot of consideration I have decieded to try to run my 3400 with the thinner gaskets. I have talked to engine buiders that say I should be OK, but that I will be out of the safe area. The engine has new bearings and there isn't a carbon build up on top of the pistons. These factors have to be considered when buuilding an engine that needs to last 100,000 miles. Mine only has to last @ 600 laps before it is tore down and rebuilt again. The RPMs that I will be running are moderate at @ 5700 max. Hopefully these moderate engine speeds keep the flex and stretch from allowing the pistons to contact the head. I Used roll head gaskets for a 3.4L ironhead engine these should be around .045" thick compressed and my pistons pop up .012" over the block giving me .033" piston to head clearance.
I used posted values to calculate if this .012" over the block could be way off But came up with .015" over the block. Here are the numbers that I used to calculate piston height. 1.478 compession height + 1/2 stroke 1.655" + 5.70 rod length=8.833", deck height on a 3400 is 8.818" this gives me .015" over the deck. Has anyone heard of a 3400 engine failure because of running the thinner iron head gaskets? Is there anything else that I should consider before I start running this engine this way? Anyone think its to much of a risk?
I used posted values to calculate if this .012" over the block could be way off But came up with .015" over the block. Here are the numbers that I used to calculate piston height. 1.478 compession height + 1/2 stroke 1.655" + 5.70 rod length=8.833", deck height on a 3400 is 8.818" this gives me .015" over the deck. Has anyone heard of a 3400 engine failure because of running the thinner iron head gaskets? Is there anything else that I should consider before I start running this engine this way? Anyone think its to much of a risk?
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