engine bore
Drifting
Joined: Jun 2005
Posts: 1,523
Likes: 1
From: grand prairie texas
Best answer in my opinion is take your block to your local machine shop and have them re mike your bore and they will tell you what size piston is best for you. I doubt they would even charge for that.
Thread Starter
Intermediate
Joined: Dec 2009
Posts: 49
Likes: 0
Racer
Joined: Apr 2009
Posts: 330
Likes: 44
From: Cincinnati Ohio
I agree with Wnmech, take it to a machine shop that has a real bore gage. To get good reading, you need to check several places both radially and up and down in the bore. If is is that close to being .060" over then they may just be able to hone it to proper size for a set of new pistons. Do it right rather than having to do it over.
Le Mans Master
Joined: Apr 2007
Posts: 7,353
Likes: 72
From: Graceland in a Not Correctly Restored Stingray
Even if they do charge a nominal fee, they'll do it using a proper dial bore gauge for accuracy you can't get with vernier calipers. Also, IMCO it's a good idea to wait on ordering pistons until after having the bores cleaned up first. Don't be penny wise and pound foolish here.
Drifting
Joined: Dec 2005
Posts: 1,360
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From: NORTHEAST
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Team Owner
Joined: Jan 2006
Posts: 37,637
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From: Crossville TN
You need some telescoping bore gauges. Set them properly in the bore, lock them down, and use your calipers to measure across the ends of the gauge. It would be better to use a good set of 4-5" vernier micrometers so that you can get accurate readings...top, middle, and bottom of bore at 0 and 90 degree locations. That will also get you roundness and taper for those bores.