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ejm 07-31-2012 06:30 PM

bbc used piston question
thinking about buying a set of used pistons, they are keith black 787 my motor is a stock crank and rods open chamber heads my question is that on kb website it shows these with a 4.25 stroke and 6.385 rod can i still use with a 4 in stroke and 6.135 rod?

BEAST477 07-31-2012 06:42 PM

No. Your piston will be .500 down in the cyl at TDC if I did the #'s right.

ejm 07-31-2012 06:49 PM

k but if a guy picks them up for 125 is it worth finding a set of 6.535 rods?

BEAST477 07-31-2012 06:54 PM

You would still be down in the cyl and I forgot in my first post crank throws to piston skirt clearance might still be an issue.

ejm 07-31-2012 06:56 PM

ok thanks for saving me some cash

BEAST477 07-31-2012 07:01 PM

No problem. If you have a reputible engine builder close by that you trust you can check with him also.

maxpower671 08-01-2012 10:52 PM

really good question,

and even better answers! Solid!!!!!!!!

unless you have a good use, or want to put them on the shelf for later.....pass........

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