Old school vs New school
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Old school vs New school

  1. #1
    Senior Member steveo143's Avatar
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    Default Old school vs New school

    Turbos for the 621cu BBC build. Pair of Garrett 91's. Huge compared to the little Rayjay 301
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    steveo143 AKA DiMarco 21 II



    Now totally Green on E-85, saving the world one ear of corn at a time!
    RIP Davey B and Denis and Chris and Bob GN7

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  3. #2
    Highaboosta Unchained's Avatar
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    Thumbs up

    Those should do the job.
    What A/R is the turbine housing ?

    Twin Turbo 1800 HP V-Drive lake boat

    http://s621.photobucket.com/albums/t...t=MAH05771.mp4

    Quote Originally Posted by Trigger View Post
    No one cares about your buddies old antiquated garden hose technology.
    Quote Originally Posted by MAXIMUS View Post
    I think I could run more boost but it's a real hand full right now

  4. #3
    Senior Member steveo143's Avatar
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    Default

    Hot side 1.16
    steveo143 AKA DiMarco 21 II



    Now totally Green on E-85, saving the world one ear of corn at a time!
    RIP Davey B and Denis and Chris and Bob GN7

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    Highaboosta Unchained's Avatar
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    Was there any other A/R choices on the turbine housings ?
    I guess I would have preferred a T6 flange over the V band for a turbo that large.

    On E85 I've been running 1.32 A/R and feel I need to go larger to work with this fuel. The boost is still way above where I want to be.

    I checked it yesterday and it was on the rev limiter at 7700 / 26# boost with the wastegates wide open. I certainly need larger gears than the 37s.
    Last edited by Unchained; 09-14-2009 at 04:16 AM.

    Twin Turbo 1800 HP V-Drive lake boat

    http://s621.photobucket.com/albums/t...t=MAH05771.mp4

    Quote Originally Posted by Trigger View Post
    No one cares about your buddies old antiquated garden hose technology.
    Quote Originally Posted by MAXIMUS View Post
    I think I could run more boost but it's a real hand full right now

  7. #5
    Senior Member steveo143's Avatar
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    I would have prefered a T6 flange also but the price was too good to pass up. Found these on Yellowbullet and they were local to me. Hate to buy something like turbos sight unseen and hope that they don't get wounded during shipping. The hot side housings are made by "Precision" and and are supposed to be 16 lbs. lighter. I don't want to rev that high in mine. I plan to start with 48's and go up from there. You should be able to get 48's in your box without cutting the water jacket, don't need the water anyway. What size blowoff's and wastegates are you running?
    Last edited by steveo143; 09-13-2009 at 06:34 AM.
    steveo143 AKA DiMarco 21 II



    Now totally Green on E-85, saving the world one ear of corn at a time!
    RIP Davey B and Denis and Chris and Bob GN7

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    senior member turbo wog's Avatar
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    hey stevo the turbine housing should be able to be replaced with a v'band to the compressor & t6 to exaust. is the v-band the same size as the rajays to the compressor?

  9. #7
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    Quote Originally Posted by steveo143 View Post
    Turbos for the 621cu BBC build. Pair of Garrett 91's. Huge compared to the little Rayjay 301
    Sure Steve 'rub it in'. With all the bearing, shaft, seal and wheel improvments over the years, those two Garretts will take less effort to 'spool up' than the ONE 301E ! "Way back we would have to "rope start the blowers (turbos) and then crank up the motor" HA HA ! NICE!
    Last edited by GFINISHLINE; 09-15-2009 at 04:15 PM.

  10. #8
    Highaboosta Unchained's Avatar
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    I've had friends with roots blowers tell me that after they got it restripped it took a 2' long bar to roll it over
    That would be a clue to me.......................

    Compare that to my turbos that are still coasting for 30 seconds after I shut the motor off.

    Twin Turbo 1800 HP V-Drive lake boat

    http://s621.photobucket.com/albums/t...t=MAH05771.mp4

    Quote Originally Posted by Trigger View Post
    No one cares about your buddies old antiquated garden hose technology.
    Quote Originally Posted by MAXIMUS View Post
    I think I could run more boost but it's a real hand full right now

  11. #9
    Senior Member steveo143's Avatar
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    Quote Originally Posted by turbo wog View Post
    hey stevo the turbine housing should be able to be replaced with a v'band to the compressor & t6 to exaust. is the v-band the same size as the rajays to the compressor?
    I'm going to fab a transition from exhaust headers to v-band and will actually have more mounting choices. Place to egt and o2 bungs.
    steveo143 AKA DiMarco 21 II



    Now totally Green on E-85, saving the world one ear of corn at a time!
    RIP Davey B and Denis and Chris and Bob GN7

  12. #10
    Highaboosta Unchained's Avatar
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    With E85 even those big diesel turbos are going to go nuts.
    I planned on starting out with lower boost too.

    I just talked to Bullseye power and the tech guy said that with E85 two wastegates per turbo is going to be the only way to get the boost down around 15#.
    I questioned about using larger turbos but still the 1.32 A/R turbine housing is the largest available even with larger compressors.
    Evidently this is a common problem with ethanol and methanol.

    What are you using for headers ?
    Put up a pic of them.

    You're going to want those O2 bungs after the turbos.
    Last edited by Unchained; 09-14-2009 at 03:04 PM.

    Twin Turbo 1800 HP V-Drive lake boat

    http://s621.photobucket.com/albums/t...t=MAH05771.mp4

    Quote Originally Posted by Trigger View Post
    No one cares about your buddies old antiquated garden hose technology.
    Quote Originally Posted by MAXIMUS View Post
    I think I could run more boost but it's a real hand full right now

  13. #11
    Senior Member steveo143's Avatar
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    I have a pair of cast alum. Drake/Eickert manifolds with 21/8 primaries that I was going to use but if I get that set in spam I will use those. The polished stainless is very unique. I am having a sheet metal intake fabbed now with a burst panel and 2 blow off valves.
    steveo143 AKA DiMarco 21 II



    Now totally Green on E-85, saving the world one ear of corn at a time!
    RIP Davey B and Denis and Chris and Bob GN7

  14. #12
    senior member turbo wog's Avatar
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    Quote Originally Posted by steveo143 View Post
    I have a pair of cast alum. Drake/Eickert manifolds with 21/8 primaries that I was going to use but if I get that set in spam I will use those. The polished stainless is very unique. I am having a sheet metal intake fabbed now with a burst panel and 2 blow off valves.
    stevo , those turbos look as though the lag would be extreme. isn't that too big of a turbo? unless of course your running 60lbs of boostjust wondering ,but could be just the picture . i'm thinkin' "fair warning"

  15. #13
    Senior Member TwinTurbo540's Avatar
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    Those 91's will have no lag with a 621 inch engine!!

  16. #14
    mo balls than $cents$ IMPATIENT 1's Avatar
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    Quote Originally Posted by TwinTurbo540 View Post
    Those 91's will have no lag with a 621 inch engine!!
    exactly! and having 1.1ar housings, shit's gonna spool fastttttttt

    Dare to be different, if it turns out great you can claim you planned it that way.

    Jetboatperformance.com

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