Re: Potential Build, Destroked Aluminum 5.3 to 4.8, IR Intake, 8500 RPM
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Originally Posted by BR3W CITY
If he's gonna go with new pistons, just get them flycut, and then mill the 799's to bump compression. No PTV issues, and would end up making just as much power. Use the money for better rods. Imo Mast heads are $1k BARE, plus you need the offset rocker arms to run them.
Spend the money on good forged pistons and rods. Flycut the pistons if you worry about ptv because of cam, mill the 799's to bump compression, use the extra cash to get them ported if your concerned about flow. You'll come out cheaper then the heads alone.
Theastronaut- I wanna see some pics of the homemade IR setup on here (I'm on ls1tech but way too lazy to go through all their threads)
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Well if he wants to do any road racing/autox and be at high rpm consistently, like he is talking about, you will want to invest in a good valvetrain anyway. 799 heads, even ported 799 heads would get blown away by those heads and yes on a smaller CI build like his to. He is going to the trouble of creating that sweet ITB intake, it would make sense to match a big cam and badass heads for it. In the total cost of the build, its money WELL spent.
Can you setup those weber carbs for E85? Is it available in your area? if so I would think about making it run really high compression ratio's for it if its available in your area? It would help you make more torque down low, easier to tune on, run cooler, and all around just be perfect for a build like this.
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1968 C10 LWB 6.0 LSx swap. Thorley LT swap headers, TH400 cheapy jegs 3k stall, 224/228 .600 lift mild cam. comp Ni beehive springs/Ti push-rods: dyno'd 319RWHP/417RWTQ through stock truck intake, stock 317 heads, 12 bolt 3.73, and 6lug wheels! running and driving great but still more plans for it.
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