5.3L capable of 450RWHP

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Sep 20, 2008 | 07:54 PM

#11

Z284thgen

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From: tulsa ok

Quote:

Originally Posted by ZZebes

you can get a 5.3L all the way to a 383 with a 3.9 bore and a 4" stroke and make your power much easier

i think i may just bore the 5.3 out and then UT the cyl walls for thickness

Sep 21, 2008 | 11:57 AM

#12

ForcedTQ

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From: Northern CA

Quote:

Originally Posted by Truckshop

turn the 5.3 into a 5.7 and start from there.

This is your best bet if you want to stay small-ish cubes. Check out car crafts latest mag issue that did basically what you are wanting to do. Have them bore it to 3.898 which is the stock 5.7l bore size. You can find forged pistons from Mahle, Speed Pro, Sealed Power, and a few other companies in that size that will get you close to 12.5 to 1. Also check out Engine Masters, they had a build done by Tony Mamo (AFR cylinder heads) that put out 550 hp to the flywheel, this could be your goal.