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running 4.75 crank in aluminum block

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running 4.75 crank in aluminum block Empty running 4.75 crank in aluminum block

Post  hbstang on September 23rd 2019, 4:33 pm

i have an option to use a 4.750 crank im my c anc motorsorts block.it has a bore of 4.625,would this put to much load on cylinder walls/ rings ? N/A engine build with a-441 heads.standard 10.320 deck block.
also how would e-85 do at 14 to 1 comp on this?
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Post  JBR-3 on September 23rd 2019, 7:45 pm

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Post  gt350hr on September 24th 2019, 1:49 pm

Dan with a 6.7 rod it makes a 1.225 C/H and that is still OK. Cylinder wall loading is subject to skirt profile and length plus top ring land diameter. I think E85 would be OK with the aluminum head @ 14-1. You know i'm only a mile away.
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Post  JBR-3 on September 24th 2019, 6:03 pm

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Last edited by JBR-3 on October 17th 2020, 3:14 pm; edited 1 time in total (Reason for editing : .)

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Post  BOSS 429 on September 24th 2019, 9:31 pm

In on 1
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