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Turbo LS1 with 317 Heads

This is a discussion on Turbo LS1 with 317 Heads within the Forced Induction forums, part of the LSx Technical Help Section category; I know there are many threads about turbos and such but I would like to know some opinions... Im planning ...

  1. #1
    Member My00Z28's Avatar
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    Turbo LS1 with 317 Heads

    I know there are many threads about turbos and such but I would like to know some opinions... Im planning on doing a 408 stroker in the future but for now would like to turbo the LS1 to make some awesome power....
    I know my 4l60e will not handle the power being stock so that would have to be rebuilt along with replacing the rear-end/driveshaft...
    Iv been talking to a buddy that knows turbos real well and got some good information from him.
    This is what Im looking at.

    GT45 turbo, LS6 Intake, Full Gasket kit w/ARP bolts, oil lines, wastegate, BOV, LS6 Springs, Intercooler and piping, and we were going to get it bench tuned and fine tune it our selves...

    I have a set of 317 heads to drop the compression on the LS1 and 6l exhaust manifolds, im going to front mount it also somewhat like this.


    What you guys think?
    Last edited by My00Z28; 12-01-2011 at 02:39 PM.

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    137 views and no reply?

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    What are youf flow numbers on the heads and what is your power goal?

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    Also what is the lbs/min air flow on the turbo your picking out, post its chart

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    Quote Originally Posted by extremecorvette View Post
    What are youf flow numbers on the heads and what is your power goal?
    Stock 6.0 Heads
    Chamber 71.0 cc 0.100 0.200 0.300 0.400 0.500 0.550 0.600
    Intake ??? 66 142 196 228 236 238 240
    Exhaust ??? 59 104 137 155 167 173 177
    Valve Diameter Intake 2.00"
    Valve Diameter Exhaust 1.55"

    Looking for around 500+HP but the fuel system will have to be upgraded to handle that!

    Quote Originally Posted by extremecorvette View Post
    Also what is the lbs/min air flow on the turbo your picking out, post its chart
    idk if its correct but the only thing i could find was it may be 100lbs/min?

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    I would think max boost you will be able to run depending on the tune would be around 10-13psi on 93 oct on a built motor. With a 402 you could drop the CR to 9:1. I would think with that you would have no problem making 500 to 650 rwhp. If you look up my post about my build you will see the heads I used flow 391 at 0.600" lift and I'm also using a LS7 intake. I have a extra set of heads for sale if your intrested. My turbos flow 120 lbs/min and with those heads and 9:1 CR they made 805rwhp on 13lbs and 690rwhp on 9lbs.

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    Member My00Z28's Avatar
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    Quote Originally Posted by extremecorvette View Post
    I would think max boost you will be able to run depending on the tune would be around 10-13psi on 93 oct on a built motor. With a 402 you could drop the CR to 9:1. I would think with that you would have no problem making 500 to 650 rwhp. If you look up my post about my build you will see the heads I used flow 391 at 0.600" lift and I'm also using a LS7 intake. I have a extra set of heads for sale if your intrested. My turbos flow 120 lbs/min and with those heads and 9:1 CR they made 805rwhp on 13lbs and 690rwhp on 9lbs.
    thanks for the info... the 317 heads i got now are completely stock and ill be getting them ported and polished with full valve job so my flow numbers will be higher depending on the pistons i run and head gasket thickness i will be around 9.3ish:1 for my 408.... with the ls1 the way it is im going to throw the heads on as is with ls7 springs and intake ill probably push around 8-10 psi with ARP rod bolts! any info more is appreciated...

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    Senior Member JoshuaGrooms83's Avatar
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    geez these threads are dead around here lol
    anyway, hows the build going? how'd the 317s pan out?

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    Working on turbo build still ls1 eep blower cam and 317 heads. N/a motor is running good hoping to get it running this summer

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    nice, i picked up a set of 317 head for $80 off ebay. even has the rockers still on it! will make up grading the springs and trunion upgrade, that much easier! hell of a deal!
    Now i do have question on the 317 heads, can i run 317 heads on stock LS1 cam (5.7L mind you) temparaly or will this be too laggy in the reponse department? im still waiting to get a cam but was just wondering about this route for info.

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    Member My00Z28's Avatar
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    You may notice a power difference because your going from 10.5:1 to 9.5:1. It will be fine just expect a power loss.

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    Senior Member JoshuaGrooms83's Avatar
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    even if i up the boost?

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    With boost u should increase power because those heads flow like 243 heads.

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    Senior Member JoshuaGrooms83's Avatar
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    oh ok. im wondering if i should put the heads on or wait until i get a cam. still debating this in my head stilll lol

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    I would personally wait!

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    Senior Member JoshuaGrooms83's Avatar
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    yeah im thinking the same thing. that way i just do everything at once.

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    Yup

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    Senior Member JoshuaGrooms83's Avatar
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    at least i already hav ethe heads so i can at least clean them up and prep them to go on the car before hand

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    Member My00Z28's Avatar
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    Haha ya that's what I did

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    Senior Member JoshuaGrooms83's Avatar
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    well the heads came in today, just got to clean them up and prep them to be turbofied lol

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