317 heads with stock ls and some boost??
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From: westminster MD
317 heads with stock ls and some boost?? aight iam only asking opinions and if this will make any decent power and could possibly run more boost with higher hp numbers than my stock ls1.... with i might ad 134k
ok say i buy a set of stock truck 317 heads clean them up some and slap them on my motor. iam under the assumtion that this will drop the CR of the motor? now if that proves to be right i assume that they flow better than my stockers also? so am i right in the assumtion that if i put these heads on i can run more boost ( no more than 10) and then will egual more HP.but then again while dropping the CR i might be hurting myself some please let me know... iam cheap *** if it will make a lil more power i dont are i anna see what i can get out of her the cheapest i can go
BTW its a 01 ws6 A4 342 rear
i drive her everyday untill sept, i want 450 HP and i want it the cheapest i can get it with a turbo i dont wanna run anymore than 6 on my motor as it sits right now
am i complete idiot or will it possibly make more HP?
ok say i buy a set of stock truck 317 heads clean them up some and slap them on my motor. iam under the assumtion that this will drop the CR of the motor? now if that proves to be right i assume that they flow better than my stockers also? so am i right in the assumtion that if i put these heads on i can run more boost ( no more than 10) and then will egual more HP.but then again while dropping the CR i might be hurting myself some please let me know... iam cheap *** if it will make a lil more power i dont are i anna see what i can get out of her the cheapest i can go
BTW its a 01 ws6 A4 342 rear
i drive her everyday untill sept, i want 450 HP and i want it the cheapest i can get it with a turbo i dont wanna run anymore than 6 on my motor as it sits right now
am i complete idiot or will it possibly make more HP?
you can hit 450 rwhp with about 7 lbs of boost on a stock ls1. The heads are not a bad option by any means but you can reach your goals with a stock engine (id upgrade to comp 918 valvesprings or maybe some patriot duals) and a procharger d1sc at 7 lbs. EPP has awesome deals on their kits but another option would be the aps twin turbo system.
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From: westminster MD
o crap i forgot to mention that iam building my own sts "style" turbo kit with a 73 mm turbo sorry for that small bit of info i failed to mention... i mean i have been getting est. from my tuner saying 6 on a stock motor thats all he would go or its most likly gonna blow
just keep ur stock heads..clean those up or some port work if u wanted more flow. the 6.0 wont realy do to much for u with out a cam but then u'll be pushing the motor to hard. when i did my car i wasnt thinking right and put 6.0 heads on..i'm running 11-12psi to make the hp i wanted.. its about a 11.50/70 car on low boost/7-8lb's and went 11.1 @ 124 on nittos 1.80' 
i'd say just run it on the stock motor maybe push rods and 918's and rev it to 6200 max and will last a long time and drive everyday and have some fun
i'd say just run it on the stock motor maybe push rods and 918's and rev it to 6200 max and will last a long time and drive everyday and have some fun
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From: westminster MD
well see thats the thing i didnt wanna put any money into my stock heads i hate them i hope they burn loli mean i have a 3500 stahl if i could touch 11.50s playing around i would be more then happy so now i guess i should ask since iam NOT and refuse to mess with the 241's would it be benificial to use the 317 heads and throw a bunch of boost into it
i can get the set of head for 40 bucks and they only MAYBE 15 k on them
i can get the set of head for 40 bucks and they only MAYBE 15 k on them
well, ur car will go form 315+whp stock head to 275whp with 6.0 so it will be a lil doggy with out boost compared to a higher compression head..but the 6.0 flow like a LS6 head so its still gonna make good power under boost 10-12psi.. my car made like 350whp on the 7lb spring added a few more lbs and did close to 500 through my auto. It screams when it gets into boost which it pretty much right away. So u have the heads already? if u dont mind the work do it and think about doin a z06 cam down the road, it will make it more boost efficient. dont worry about dyno numbers u have an auto and high stall..just RACE IT
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I just recently put on the 317 heads that i picked up at a junkyard and hand ported them myself. The lower compression allows you to run more boost, I would say no more than 12psi. My motor has 109K on the stock bottom end and still made 500rwhp @7psi through a stalled auto with 3.42 gears. I just killed my turbo and I am running it n/a right now and even with the lower compression It hauls some ***, prob. because of the port wrk i did
. You should go with the heads especially if u can get them that cheap. You mine as well put some arp head bolts on it like I did. By the way I am making 550rwhp at 10psi easy.
. You should go with the heads especially if u can get them that cheap. You mine as well put some arp head bolts on it like I did. By the way I am making 550rwhp at 10psi easy. 
I'm glad someone asked this because I was wondering the same thing.
I didn't know if it I would make more power by dropping the compression ratio and running more boost or just leave the stock heads on it.
The difference might not be worth the trouble I don't know.
Thanks.
I didn't know if it I would make more power by dropping the compression ratio and running more boost or just leave the stock heads on it.
The difference might not be worth the trouble I don't know.
Thanks.
I'm glad someone asked this because I was wondering the same thing.
I didn't know if it I would make more power by dropping the compression ratio and running more boost or just leave the stock heads on it.
The difference might not be worth the trouble I don't know.
Thanks.
I didn't know if it I would make more power by dropping the compression ratio and running more boost or just leave the stock heads on it.
The difference might not be worth the trouble I don't know.
Thanks.
You only get about 30hp per point of compression versus 25hp per pound of boost. With 1 point of comp down you can run about 4psi of boost over your current. So ive heard.
By dropping compression you can also add more boost while still running pump gas. You can safely run 7-8 psi on a stock engine as long as you have enough fuel, a spot on tune, and maybe meth/alky injection. If you are going to do a valvespring swap then id say get a decent boost cam. As stated above an ls6 cam out a z06 or ctsv is a good choice as it will give you decent gains and will give you perfect idle quality. If I were doing the same build I would get a slightly larger cam than the ls6 (something in the low 22x/22x range) as it will give you great gains without really affecting idle quality. If budget is an issue I would say stay with your stock heads, pick up an ls6 cam and some comp 918's, a racetronix or walboro fuel pump with minimum 42# injectors, and then save for a good tune (either through your MAF or if possible get an SD tune). As for the kit I would search Zombies posts as he has some fantastic experience with the sts kit. For a custom kit I have seen most use either z06 manifolds or the cast iron truck manifolds, either coated/wrapped, and then coated/wrapped exhaust to keep heat in. Let us know though how your build goes and what you choose!
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saweet yeah im just gonna go with the 317's there cheap enough and ill hand port them a lil bit to, now i can get a stock cam out of a 07 cts-v for 150 with springs i dont know if that is the ls2 or ls6.
but yeah heres my plan
73 mm turbo
tial wastegate
old school greddy type s BOV
24x12x4 intercooler(for 75 bucks)
317 heads slightly ported
some sort of cam pref. ls6
10-12 psi
342 junk 10 bolt the will go
3500 stalh
already on it a 80 MM bbk TB
some old drag radials till she breaks
can i get by wuth 42lbs injectors?
and fuel pump
and tune done by jeff@psi
what u guys thinking HP wise with all of that?
but yeah heres my plan
73 mm turbo
tial wastegate
old school greddy type s BOV
24x12x4 intercooler(for 75 bucks)
317 heads slightly ported
some sort of cam pref. ls6
10-12 psi
342 junk 10 bolt the will go
3500 stalh
already on it a 80 MM bbk TB
some old drag radials till she breaks
can i get by wuth 42lbs injectors?
and fuel pump
and tune done by jeff@psi
what u guys thinking HP wise with all of that?
Thread Starter
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From: westminster MD
and ya kjnow what.... i love u guys in the FI section, u guys have always been nice to me havent ragged on me nothin
thats great i have never gotten more help on ls1 tech than any other section in here
the guys in the internal engine are mmeeeennnn
so thank u all and when then build starts lots and lots of pictures will be added
thats great i have never gotten more help on ls1 tech than any other section in here
the guys in the internal engine are mmeeeennnn
so thank u all and when then build starts lots and lots of pictures will be added
you will need 60lb injectors, if you plan on making much over 500 at all. IMHO, I like the idea, and I would def go with a small turbo cam with dual springs. Good luck with the build.
saweet yeah im just gonna go with the 317's there cheap enough and ill hand port them a lil bit to, now i can get a stock cam out of a 07 cts-v for 150 with springs i dont know if that is the ls2 or ls6.
but yeah heres my plan
73 mm turbo
tial wastegate
old school greddy type s BOV
24x12x4 intercooler(for 75 bucks)
317 heads slightly ported
some sort of cam pref. ls6
10-12 psi
342 junk 10 bolt the will go
3500 stalh
already on it a 80 MM bbk TB
some old drag radials till she breaks
can i get by wuth 42lbs injectors?
and fuel pump
and tune done by jeff@psi
what u guys thinking HP wise with all of that?
but yeah heres my plan
73 mm turbo
tial wastegate
old school greddy type s BOV
24x12x4 intercooler(for 75 bucks)
317 heads slightly ported
some sort of cam pref. ls6
10-12 psi
342 junk 10 bolt the will go
3500 stalh
already on it a 80 MM bbk TB
some old drag radials till she breaks
can i get by wuth 42lbs injectors?
and fuel pump
and tune done by jeff@psi
what u guys thinking HP wise with all of that?
What about the fact that the 317's intake runners are the same size as the LS6 intake? I have been planning on using some 317's to drop the compression & flow more although I dont know how much a few cc's would get you but I thought the fact that the ports will be pretty close to matching that it would help the efficiency. IMO
