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Camalot

09-26-2018 06:57 AM

Gen 6 502 over size pistons

I have a chance of getting my hands on a Gen 6 502 which had a riser gasket fail with low compression in two cylinders for cheap, looking around for pistons I see they only make 4.500 as the next size. The only play I find a .030 over is GM Performance which is a little pricey :)
Could anyone advice me if this is the only way to go and can the Gen 6 be bored out to 4.500 with no problems?

Thanks in advance

Camalot

09-26-2018 07:06 AM

Sorry guy's I was looking at the wrong spec sheet lol I see stock bore is 4.465.............opps

F-2 Speedy

09-26-2018 07:34 AM

many things can cause low compression, it may not even need bored, have you pulled it apart ?

GPM	09-26-2018 08:14 AM

4.47

Camalot

09-26-2018 09:27 AM

Quote:

Originally Posted by F-2 Speedy (Post 4651232)

many things can cause low compression, it may not even need bored, have you pulled it apart ?

Your right and the bores could well be okay, but it's almost free well a trade with a gen 4 block I have and would want to rebuild it anyway ........it has quite a few hours on it.

Camalot

09-26-2018 09:30 AM

Quote:

Originally Posted by GPM (Post 4651238)

4.47

Thanks for the correction I've altered it now, fat finger don't type to well lol

Baja Rooster

09-26-2018 10:05 AM

JE makes a set .002 oversized. If everything else is good you can get away with a good honing with torque plates and be better than new. I’d still lean towards boring it out though as the expenses for parts are the same.

http://www.jepistons.com/Catalogs/SR...placement.aspx

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