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Thread: boost level

  1. 04-18-2008, 06:39 AM #1
    jb's03hd
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    boost level

    i was wonering what the stock boost level is on an 02 and i also wonder what it would be with a 2.7 upper pully the truck also has a jlp lower pully but i dont know what size it is and the guy i bought it from couldnt remember the size i will be getting a bost guage before long but i was wondering what the boost would be with the upper and stock lower thanks
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  2. 04-18-2008, 07:31 AM #2
    jmarvolous
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    stock with factory pulley's should be 6lbs...
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  3. 04-18-2008, 08:37 AM #3
    DallasGT01
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    Quote Originally Posted by jmarvolous View Post
    stock with factory pulley's should be 6lbs...
    You sir...



    ARE CORRECT!!!
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  4. 04-18-2008, 08:47 AM #4
    jb's03hd
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    ok.........any idea on what boost would be with the 2.7 and a stock lower
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  5. 04-18-2008, 10:13 AM #5
    DallasGT01
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    Quote Originally Posted by jb's03hd View Post
    ok.........any idea on what boost would be with the 2.7 and a stock lower
    10-12 lbs
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  6. 04-18-2008, 12:55 PM #6
    jb's03hd
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    wow thanks for the info
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  7. 04-18-2008, 01:48 PM #7
    SCBQQSTN
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    much better choice for a 6 lb lower, with a pulley that small chances are it will be slipping alot.
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  8. 04-18-2008, 07:41 PM #8
    C Dillon Go
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    Quote Originally Posted by SCBQQSTN View Post
    much better choice for a 6 lb lower, with a pulley that small chances are it will be slipping alot.
    You sir...





    Are a genious!!

    LOL

    6# is a recomended mod from all of us!!
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  9. 04-19-2008, 05:36 AM #9
    jb's03hd
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    well it has jlp lower on it too but i dont know the size and the guy i bought the truck from just said it came off of his friends lightning so i dont know what sort of boost this thing is making but it is probably pretty high with both pullies right (this is my very first supercharged vehicle )
    is there a way to find out the size of the lower on it?
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  10. 04-19-2008, 04:47 PM #10
    jb's03hd
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    well it was put on the dyno and made 346hp at 4200 rpm with 13-14 psi so i thought that was respectable
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  11. 04-19-2008, 11:54 PM #11
    juice03
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    Thats pretty decent, what kinda torque #'s did you end up with ?
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  12. 04-20-2008, 01:03 AM #12
    C Dillon Go
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    Sounds like to me maybe a 4# lower/ stock upper!
    A 6# lower with basic bolt on's would run about 380/480.
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  13. 04-20-2008, 06:23 AM #13
    jb's03hd
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    Sounds like to me maybe a 4# lower/ stock upper!
    A 6# lower with basic bolt on's would run about 380/480.
    well this has only the pullies and nothing else done at all the upper is an aftermarket for sure they are doing a custom tune today the one they did yesterday was a preprogramed 91 octane tune from a diablo predator and they didnt graph the torque for some reason. they will do it today with torque but the guy said i see another 10 to 15 hp out of it with the custom and the air fuel ratio was 14:1 with the 346 pull i mean i dont know what a completly stock truck puts to the ground but i think mine is right on or will be but we will see
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  14. 04-20-2008, 06:35 AM #14
    jb's03hd
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    here is a pic or the upper pully i dont think it is stock
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  15. 04-20-2008, 06:58 AM #15
    huot5
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    doesn't look stock judging by that pic. IS the truck running fine? if you want to bump the power some more, you might want to consider a gator back belt and an addtional idler pulley (metco) or a magnum Powers idler bracket
    ( preferred) to reduce slippage. and a better flowing air box ( unless the stock one is modded. clean the MAF and get an oil separator.
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