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-   -   Max cubic inches out of Bowtie block ? (https://www.offshoreonly.com/forums/general-q/216708-max-cubic-inches-out-bowtie-block.html)

Donman 09-12-2009 04:21 PM

Max cubic inches out of Bowtie block ?
 
What is the maximum cubic inches you can get from a Bowtie 502 block and what pieces do you need to get there ?

DonRoc 09-12-2009 08:39 PM

Bore 4.560 if you sonic test and a 4.25 crank would be safe. 557CI

Griff 09-12-2009 10:50 PM

588

CB-BLR 09-12-2009 11:28 PM


Originally Posted by Griff (Post 2951371)
588

4.56 Bore
4 3/8" stroke

Chris

Young Performance 09-12-2009 11:48 PM

Personally, I wouldn't put a 4 3/8 crank in a 9.8 deck height block. The rod angle is to steep for my taste. I would stick with a 4.25" crank and you could go all the way to 4.600. That would make a 565 ci. You can take that block to 4.625" bore as long as you sonic test it. You should still have .250-.300 wall thickness at 4.625" bore. I have taken countless bowties to 4.600 with no problems.
Eddie

raeburn 09-13-2009 12:11 AM

I had a 502 bowtie at 4.600 with stock crank (think it worked out to 525 cu.) ran great with an easy 600 hp/600 ftlbs. at 9:1 compression with Dart intake and EMI exhaust. Loved that engine!!

Young Performance 09-13-2009 12:38 AM


Originally Posted by raeburn (Post 2951408)
I had a 502 bowtie at 4.600 with stock crank (think it worked out to 525 cu.)

That would make a 532 ci.
Eddie

Payton 09-13-2009 08:25 AM

Could you guys explain Sonic Testing? Are you checking the thickness or strength of the cylinder walls? And you do this before boring, right? Otherwise you've ruined a block that could be used with less bore. Am I close?

Donman 09-13-2009 08:54 AM

Thanks for the input guys.

Griff 09-13-2009 12:00 PM


Originally Posted by Payton (Post 2951467)
Could you guys explain Sonic Testing? Are you checking the thickness or strength of the cylinder walls? And you do this before boring, right? Otherwise you've ruined a block that could be used with less bore. Am I close?

Yep, sonic testing will check for wall thickness.


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