budget turbo heads
budget turbo heads alright, i've got some money coming in down the road and i want to start planning now:
-APS TT kit (~8psi tops)
-forged pistons (stock compression)
-some kind of budget head (NEED HELP HERE...want to keep stock compression)
-fully machined block (cleaned up cylinder walls, line hone, blah blah blah) with reconditioned rods and crank
-fast 92/92
-ls6 oil pump and ls2/7 timing set
-after turbo TDs
what kind of heads do you recommend?? i want to keep stock compression and probably the stock cam as well, i may go with a gt2-3 cam from lingenfelter tho. i've searched all around and gone blind on all the head specs from patriot and TEA but nothing really matches up to exactly what i need
. i just plain need help here.
-APS TT kit (~8psi tops)
-forged pistons (stock compression)
-some kind of budget head (NEED HELP HERE...want to keep stock compression)
-fully machined block (cleaned up cylinder walls, line hone, blah blah blah) with reconditioned rods and crank
-fast 92/92
-ls6 oil pump and ls2/7 timing set
-after turbo TDs
what kind of heads do you recommend?? i want to keep stock compression and probably the stock cam as well, i may go with a gt2-3 cam from lingenfelter tho. i've searched all around and gone blind on all the head specs from patriot and TEA but nothing really matches up to exactly what i need
. i just plain need help here. Well I know what most guys use for CHEAP turbo setup heads are the 6.0L 317 casting heads. It wont retain the exact compression but it lowers it slightly, which for big boost, might be helpful, so you wont raise em up.
its not crucial to keep it EXACTLY stock (one or two point either way won't kill me, though i'd prefer to bump up before down). i want aftermarket heads because they flow better than stock (even ported stock) heads.
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Since you stated it's a daily driver you'll make more power with slightly less compression and more boost in regards to a static octane ratio between the two options.
valid point; but from the aspects for fuel economy, throttle responsiveness, and engine longevity, i'm still leaning heavily towards a tad higher on the compression and an 8psi absolute ceiling.
TECH Fanatic
Joined: Nov 2004
Posts: 1,251
Likes: 0
From: Tuscaloosa, AL.
why fast 90/90 for turbo app? Really isn't necessary. Would be better to get get an ls6 and put the extra 1k or so in headers, intercooler, fuel system or something of the sort. not to mention, i believe that the fast intakes may leak under a lot of boost. Not really a concern until 18 psi, but still, why spend the coin if you can spend it somewhere else.
on an otherwise stock ls1 w/ unmilled ls6 heads (assuming ls6 stock comb. chambers), what size relief will i need to get within ~.1 of 10:1 SCR. (thats a 9.9:1 - 10.1:1 range). diamond seems to love the -2cc, will that be closer to 10:1 or 10.5:1??
why fast 90/90 for turbo app? Really isn't necessary. Would be better to get get an ls6 and put the extra 1k or so in headers, intercooler, fuel system or something of the sort. not to mention, i believe that the fast intakes may leak under a lot of boost. Not really a concern until 18 psi, but still, why spend the coin if you can spend it somewhere else.
TECH Fanatic
Joined: Nov 2004
Posts: 1,251
Likes: 0
From: Tuscaloosa, AL.
simply, i plan on taking this motor to 427ci in the not too distant future and i'll need the extra breathing room of a 92/92 then anyway. will some of its potential be wasted on a 346? yes, but i can live with that knowing that i won't have to buy another top shell and TB down the line.
very true landonew, i was thinking about going with the heads for the 427 as well but i wasnt sure about strapping 235cc big (~70cc) chamber heads on a 346...i'll look into it a little bit more tho. if i've got the money it might be worth it.
