best valve combo for turbo
Thread Starter
Launching!
Joined: Feb 2012
Posts: 217
Likes: 0
From: midland michigan
best valve combo for turbo please some one chime in and help find out what the best valve diameter is for my heads. they are at the machine shop right now waiting on me to tell them what size i want.
thank you
thank you
Thread Starter
Launching!
Joined: Feb 2012
Posts: 217
Likes: 0
From: midland michigan
sorry guys, i was on my way out the door when i posted the question and didnt give the information on it. its a 5.3 block, i'm keeping the bottom end stock as far as crank, rods, and piston. its at the machine shop right now getting hot tanked, honed and cam bearings. the heads are 862's and they are all stock. i will be using an ls1 style intake and 60mm twin turbo set up. i will be using an overdrive trans and probably a 3:23 rear gear. is that enough info.
the guy at the machine shop said i would be better off buying a pair of rhs heads for about $700 vs spending about the same amount to get mine up to that level... any input?
thanks
the guy at the machine shop said i would be better off buying a pair of rhs heads for about $700 vs spending about the same amount to get mine up to that level... any input?
thanks
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Thread Starter
Launching!
Joined: Feb 2012
Posts: 217
Likes: 0
From: midland michigan
hey orange thanks for the input. not trying to debate ya honestly (i'm kinda a newbie to motors) but why. everything i read about these 5.3 lower ends is that they are amazing. big bang theory article for example. i can do better pistons but i wasn't going to if i didn't need it. this will be strictly a street car never gonna see a pair of slicks. the tuner in my area said we'll probably tune for somewhere between 12 and 14 lbs of boost and call it a day.
thanks again, very appreciated anytime i get input on this stuff.
thanks again, very appreciated anytime i get input on this stuff.
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Thread Starter
Launching!
Joined: Feb 2012
Posts: 217
Likes: 0
From: midland michigan
just mentioned that article in regards to the bottom end holding up. I'm not following what they did. orange mentioned i should consider better pistons vs head work. so i asked why, I'm not motor guru so i was/am genuinely curious why.
They ran that motor on 118 octane race gas on an engine dyno with TEA ported stock heads, only change being the intake valve size (and porting obviously). If you want 850whp you're gonna need pistons at a minimum to have some degree of reliability. That's just my 2 cents, it's your money.
Thread Starter
Launching!
Joined: Feb 2012
Posts: 217
Likes: 0
From: midland michigan
They ran that motor on 118 octane race gas on an engine dyno with TEA ported stock heads, only change being the intake valve size (and porting obviously). If you want 850whp you're gonna need pistons at a minimum to have some degree of reliability. That's just my 2 cents, it's your money.
back to the heads... so with boost do you guys thank i should leave well enough alone with the stock heads and direct the $ elsewhere? other then some better springs.
Thread Starter
Launching!
Joined: Feb 2012
Posts: 217
Likes: 0
From: midland michigan
i'd love some recomendations on cams though 
