N/A e85 5.3 build
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N/A e85 5.3 build After my last thread I got a lot of good info and thoughts to research and read about so as the title says I'm going with a N/A e85 build. My goal is mid 400s at the crank, so here's what I have in mind. Ive got a stock bore low mileage 5.3 short block with new ring, I have a guy local selling a set of 862 heads with 2.02 intake valves for a really good price so I'm thinking of going with these due to budget, my first question is how much should I milk the heads and what head gasket should I use for optimal compression for e85? Secondly I need a cam and spring suggestion for this setup, I am partial to Comp and Tsp so a I would like to stick with them, what cam would be best for my setup?
Other info: I will be running a ls6 intake I already have and in thinking of running 42lbs ls3 injectors? Ive found a set for a good price so let me know if these will work.
The vehicle is 2000lbs and I'm running a 4l80e with 3.73 gears out back, the vehicle is solely my toy so idle quality is not important, it can be rough as a cob as long as it doesn't die at the light. It will be mostly street raced but will spend time at the strip too.
Id like max effort and power out of the cam as it's my toy, I also plan on a 125 shot.
let me know if you have any questions
thanks, Brian
Other info: I will be running a ls6 intake I already have and in thinking of running 42lbs ls3 injectors? Ive found a set for a good price so let me know if these will work.
The vehicle is 2000lbs and I'm running a 4l80e with 3.73 gears out back, the vehicle is solely my toy so idle quality is not important, it can be rough as a cob as long as it doesn't die at the light. It will be mostly street raced but will spend time at the strip too.
Id like max effort and power out of the cam as it's my toy, I also plan on a 125 shot.
let me know if you have any questions
thanks, Brian
So you're going 5.3 e85 build . Is this going to be high compression 13:1 build? As for the heads , some may disagree but the 862 w/ 2.02 maybe a bit too big for the small bore.
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And I was reading where some people think that about the valve being too big but would it be worse then than a stock valves 862 head?
What is your budget for this build ? And what car is this going in ? You do know street racing is against the law !
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Not a set budget but I will be sticking with a stock casting head and and rotating assembly. And its going in a 1946 ******. And yes Mom I'm fully aware street racing is illegal🙄
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No, you should look into pistons with high domes if you want high compression. The milling will help but with the small displacement engine your talking about you'll need a purpose built piston. The head gasket will used to get the quench you want and only help minimally with setting static compression. Just turn it into a 5.7 and compression come with that. Yes to good ported 862's
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No, you should look into pistons with high domes if you want high compression. The milling will help but with the small displacement engine your talking about you'll need a purpose built piston. The head gasket will used to get the quench you want and only help minimally with setting static compression. Just turn it into a 5.7 and compression come with that. Yes to good ported 862's
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With that small displacement engine and stock style flat tops you'd be lucky to get close to 11:1, you won't need e85 for that.
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Hard to say on the lower compression. E85 DOES help against detonation due to its high octane from the alcohol content, but at a cost of lower efficiency and overall power. The only way E85 really pays off is with very high compression.
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Without aftermarket pistons it will be hard to get the compression where you want it and not have piston to valve issues. My 706 heads are milled .044 and with 6cc domes it is only 12.2 to 1 compession.