5.3 vs 5.7 builds
Thread Starter
TECH Regular
Joined: Feb 2010
Posts: 433
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From: Louisville
5.3 vs 5.7 builds Ok I have a 5.3 iron short block sitting I also have the stock motor that is in my car now (daily driver) with 164k I am debating on which one to do a forged rod and piston setup on if I do the 5.3 I want to do the wiseco 3.780 pistons and &k1 rods setup if I go with my stock ls1 I will do same setup just in a 3.905 piston
The reason for the debate is within a the next year I'm wanting to go with a turbo setup
Also how much of n/a horsepower difference would I see between the two motors considering I used exact same head, cam and bolt on set up
The reason for the debate is within a the next year I'm wanting to go with a turbo setup
Also how much of n/a horsepower difference would I see between the two motors considering I used exact same head, cam and bolt on set up
What are your concerns with the 5.7L that your thinking of going with the 5.3L ? The 5.7L is more cubic inch, and 70#'s lighter... 5.7L gets my vote.
Are you planing on daily driving this after the forged motor or is this turning into a toy ?
Are you planing on daily driving this after the forged motor or is this turning into a toy ?
Thread Starter
TECH Regular
Joined: Feb 2010
Posts: 433
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From: Louisville
The reason I wanted to keep the 5.3 to a 3.78 bore is because If I ever have to rebuild again or decide A different path I can either
throw in a 4.0 crank and make it a 363 cu or bore again to a 346 like mentioned or 383 setup
I just like how many more option I have with the 5.3 block being theres more meat
I no the benefits of going with the ls1 bore u have a million piston options
throw in a 4.0 crank and make it a 363 cu or bore again to a 346 like mentioned or 383 setup
I just like how many more option I have with the 5.3 block being theres more meat
I no the benefits of going with the ls1 bore u have a million piston options
Thread Starter
TECH Regular
Joined: Feb 2010
Posts: 433
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From: Louisville
Has anyone here done the 4.0 crank with 3.78 rod before calspeed and Performance is the only site besides wiseco direct for a stroker kit with a 3.78 and 3.8 bore keep in mind wanting to go turbo down the road if leaving more meet on the cylinder walls
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The 5.3L iron blocks have all kinds of Meat in the cylinder walls ,,,,,,,,,,there was a thread in this forum maybe 6-months or so ago where the op said He bored his iron 5.3L to the 6.0L bore and sonic checked it and said the cylinder walls were still thicker than a gen1 350 .060" over . Bore the 5.3L to 5.7L and turbo it and have no worries .
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