noob questions about boring

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Oct 25, 2007 | 01:19 AM

dc_sniper9130

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From: Spokane, WA

Car: '84 Camaro SC

Engine: Swapping in a 305

Transmission: 700-R4

Axle/Gears: 3.23 One-Wheel Sqealer

noob questions about boring

Okay, I just had my 305 bored to .030 over... for a cylinder bore of 3.766 (as opposed to 3.736).

Would I want to get 3.766" pistons or a couple thousandths under?

What I mean is, are these the right pistons for me?

Thanks for any help

Oct 25, 2007 | 04:26 AM

Ironmahn

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From: Bucyrus, Ohio

Car: 1986 Trans Am

Re: noob questions about boring

You need to purchase pistons that are for a 3.766 bore, and make sure they are designed for whatever rod length that you have. You didn't say.

Oct 25, 2007 | 08:19 AM

sofakingdom

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Re: noob questions about boring

Yes those would be the correct pistons for a stock 305 bottom end (crank & rods) bored .030".

You will note that their instructions call for a VERY tight fit to the bore; like .001" - .002", if memory serves. BE CERTAIN that your bores are NO LARGER THAN 3.766" (.030" over); 3.768" (.032" over) would be too much.