LS3 Carbed build

General engine tech -- Drag Racing to Circle Track

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Re: LS3 Carbed build

Post by In-Tech » Tue Dec 11, 2018 4:33 pm

Hiya, just to chime in with my opinion. Iron block aluminum head I usually shoot for .015" - .020" preload on my high rpm hyd roller LS stuff and .010" more for alum/alum. So far it's worked well to 8000 rpm.
To each his own, just passing on some experience. Having non adjustable obviously needs the stem heights to be as close as possible and I don't get crazy ordering lot's of pushrods either, most turn out fine with 7.350" pushrods.
Nice build, btw.
Heat is energy, energy is horsepower...but you gotta control the heat.

202ci EH
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Joined: Fri Nov 21, 2014 5:11 am

Re: LS3 Carbed build

Post by 202ci EH » Wed Dec 12, 2018 5:17 am

Thanks for those 2c In tech
That's like 1/4 -1/2 turn of preload, is my math right? ( will be setting it with a dial indicator of course)


they are 2.05/1.6 . 2.5" mcsa intake / asthmatic 1.3 sqin ex :lol:
I wll update it all when I get further along, busy collecting parts and doing rust repairs/fab at the moment.

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Joined: Sun May 10, 2009 12:29 pm

Re: LS3 Carbed build

Post by CGT » Wed Dec 12, 2018 11:23 am

In-Tech wrote:
Tue Dec 11, 2018 4:33 pm
most turn out fine with 7.350" pushrods.
That is very unlikely with this build to be the correct length. Thanks for the input on the preload.
"How or Y do you think I get all this $hit, I read all of you all builds and desktop dyno them with all the correct info and I've got your build."

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