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Main Bolt/Drilling Question

Posted By Oldmics 15 Years Ago
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Main Bolt/Drilling Question

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Oldmics
Posted 15 Years Ago
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Supercharged

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Last Active: 4 Years Ago
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Gentlemen

Can someone tell me how much additional material needs to be drilled to sink the main cap bolts deeper.

I have heard of this being done to prevent the webbing from cracking.

Also what did you use for new main bolts,regular grade 8?

Thanks,Oldmics

DANIEL TINDER
Posted 15 Years Ago
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From J. Mummert's YBM article:



Use 27/64" bit. Overall depth 1.40"-1.45" (MAX!). ARP bolts (studs for racing). Thread tap: 1/2"-13 t.p.i.

6 VOLTS/POS. GRD. NW INDIANA
Oldmics
Posted 15 Years Ago
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Perfect SmileSmileSmile

Thank you Dan

Oldmics



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