Max bore for a "production" 502 block
#1
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I'm at 4.5" right now but my piston to wall clearance is 6 - 8 thousandths and the bore NEEDS to be cleaned up some...
Has anyone gone to 4.530"
Thanks,
Doug
Has anyone gone to 4.530"
Thanks,
Doug
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#5
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I got my sonic test results back..![Smilie](/forums/images/smilies/smile.gif)
Gen VI block currently bored to 4.5"
cylinder Frnt Out rear Inside
#1 top .278 .303 .357 .312
bottom.301 .286 .351 .465
#2 top .276 .303 .338 .315
bottom.268 .314 .330 .312
#3 top .341 .282 .228 .309
bottom.425 .280 .332 .362
#4 top .340 .278 .362 .331
bottom.355 .279 .345 .368
#5 top .360 .296 .337 .329
bottom.349 .291 .345 .393
#6 top .327 .273 .354 .326
bottom.337 .261 .442 .369
#7 top .360 .310 .281 .326
bottom.484 .342 .281 .362
#8 top .325 .248 .283 .334
bottom.327 .266 .276 .385
....never had a sonic test done before, but it definately looks like it's safe to go to 4.530"![Evil](/forums/images/smilies/evilB.gif)
Doug
![Smilie](/forums/images/smilies/smile.gif)
Gen VI block currently bored to 4.5"
cylinder Frnt Out rear Inside
#1 top .278 .303 .357 .312
bottom.301 .286 .351 .465
#2 top .276 .303 .338 .315
bottom.268 .314 .330 .312
#3 top .341 .282 .228 .309
bottom.425 .280 .332 .362
#4 top .340 .278 .362 .331
bottom.355 .279 .345 .368
#5 top .360 .296 .337 .329
bottom.349 .291 .345 .393
#6 top .327 .273 .354 .326
bottom.337 .261 .442 .369
#7 top .360 .310 .281 .326
bottom.484 .342 .281 .362
#8 top .325 .248 .283 .334
bottom.327 .266 .276 .385
....never had a sonic test done before, but it definately looks like it's safe to go to 4.530"
![Evil](/forums/images/smilies/evilB.gif)
Doug
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Location: claymont, DE, USA
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Piston to wall at .006 is perfect .008 is fine too when using a forged piston.
I also read where testing was done with hyper pistons from .003 to around .008 (if I remember right) and there was no issue with them either.
"Cleaning up" means .0005 -.001. .009 will work with good rings.
my.02
I also read where testing was done with hyper pistons from .003 to around .008 (if I remember right) and there was no issue with them either.
"Cleaning up" means .0005 -.001. .009 will work with good rings.
my.02