Potential Build, Destroked Aluminum 5.3 to 4.8, IR Intake, 8500 RPM

[Cannon007]

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)

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.

[theastronaut]

Originally Posted by Cannon007

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.

We have 105 octane E85 at most every station in town, and it's roughly 40-50 cents cheaper than 93. The carbs can be set up for it pretty easily, there are alot of VW guys running it. It doesn't get as much mileage, but its alot cheaper so it works out to be fairly even, plus you get the benefits you mentioned. That isn't something I've thought about but is worth considering.