Checked out Bullseye power today
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Checked out Bullseye power today

  1. #1
    Highaboosta Unchained's Avatar
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    Default Checked out Bullseye power today

    I was in Muskegon, Mi. today so I stopped by and checked out www.bullseyepower.com today.

    Very impressive, I never saw so many turbos in one place before. They have the foundry and machining facilities right there too. Thousands of turbos on the shelf. From diesel turbos to small car replacement turbos to race car stuff.

    In talking to the owner, Dave, a comparison of turbo sizes came up and I have changed my mind on what I want to be running.
    Next on my list are a couple Borg Warner S475 turbos.
    They are on the shelf there, polished compressors and all.

    Some food for thought,
    Gale Banks system Rajay turbos, 56 mm compressor inducer, T4 turbine housing flange

    Garrett TV77 turbos I have been running, 65 mm compressor inducer, T6 flange.

    Borg Warner S475 turbos, 75 mm compressor inducer, T6 flange.

    So guess which one is going to have the most HP capacity and the least back pressure ?

    My spool up time with bigger turbos is going to increase by 1/2 to 3/4 second or so and I can live with that. With the Garrett's my spool up time is 17#/sec. and lag is not even noticeable.
    Last edited by Unchained; 10-14-2008 at 02:38 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

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  3. #2
    21 Daytona Outlaw's Avatar
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    I'm Not a turbo guy, but sounds like you had fun
    #55

  4. #3
    Senior Member steveo143's Avatar
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    I've been considering them also. Do you think thet will work on my 622cu. in. build?
    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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  6. #4
    mo balls than $cents$ IMPATIENT 1's Avatar
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    Quote Originally Posted by Unchained View Post
    I was in Muskegon, Mi. today so I stopped by and checked out www.bullseyepower.com today.

    Very impressive, I never saw so many turbos in one place before. They have the foundry and machining facilities right there too. Thousands of turbos on the shelf. From diesel turbos to small car replacement turbos to race car stuff.

    In talking to the owner, Dave, a comparison of turbo sizes came up and I have changed my mind on what I want to be running.
    Next on my list are a couple Borg Warner S475 turbos.
    They are on the shelf there, polished compressors and all.

    Some food for thought,
    Gale Banks system Rajay turbos, 56 mm compressor inducer, T4 turbine housing flange

    Garrett TV77 turbos I have been running, 65 mm compressor inducer, T6 flange.

    Borg Warner S475 turbos, 75 mm compressor inducer, T6 flange.

    So guess which one is going to have the most HP capacity and the least back pressure ?

    My spool up time with bigger turbos is going to increase by 1/2 to 3/4 second or so and I can live with that. With the Garrett's my spool up time is 17#/sec. and lag is not even noticeable.
    we may go with the s475's as well mark, me and hass are trying to talk him into a smaller cube motor and just run 3-4lbs more boost to make up the difference in cubes are the s475's at that site you linked me to(paradise) all polished up as well, or is that extra, kinda a race cover upgrade thingy?

  7. #5
    mo balls than $cents$ IMPATIENT 1's Avatar
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    Quote Originally Posted by steveo143 View Post
    I've been considering them also. Do you think thet will work on my 622cu. in. build?
    you might go with the s480's, 80mm compressor, 1.12 ar, t6. even the 80mm is gonna be pretty smaller for a 622, but it'll spool up super fast and be pretty good to 25lbs or maybe a lil better. we were looking at building a 598 and its was gonna take the s480's to make big hp on pump gas and HUGE hp on good gas.

  8. #6
    Highaboosta Unchained's Avatar
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    As you can see there's quite a variety of turbo sizes that will work in twins on a BBC. This throws out what I read about turbos from my first experience with them in sand drags in the early 80s that picking the size was such an exact science . Now the import guys are putting two 75mm or larger turbos on 3000 cc Supra motor and making 1500 hp.

    And I thought my 540" motor was a monster with the 65 mm compressors.
    The trade off of going big is going to be the spool up time but the hp they are going to make per # of boost is going to increase too.
    I talked to MikeW in Houston and he has a pair of Garrett GT4788s on his 540ci motor. That's 88 mm compressor wheels. He said spool up time is not a problem at all. EFI tuning seems to be the key to fast spool up time.

    The S 475 BW's come out of the box with a plain compressor housing and v band clamp flange for around $600.00 and the custom polished compressor housing for a hose clamp flange gets them up to $ 750.00 ea.
    That's a tremendous good price as compared to a Garrett.
    They also have special ball bearing race units that can get pricey.
    I most certainly will get the polished compressor housing.



    With any of the S 400 series the turbine housing can be changed to fine tune the spool up time and the compressor wheel and housing can be changed too.

    By the way, inch to mm multiplier is 25.4
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    Last edited by Unchained; 10-18-2008 at 05:51 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

  9. #7
    mo balls than $cents$ IMPATIENT 1's Avatar
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    just ordering the basic s475's for billy's build up. he decided to go alil smaller on the cubes and make it up with boost , it'll be a twin turbo , c&s 4 bowl carb blow thru set-up, with twin air to water coolers.

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    IS anyone making watercooled housings to keep everything safe under a hatch?

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    Quote Originally Posted by Crazyhippy View Post
    IS anyone making watercooled housings to keep everything safe under a hatch?
    someone has a gale banks set-up in the parts spam section, it should be water jacketed and is made for what you're wanting to do.

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    They use such cute little turbos too...

    How about something bigger? Do i have to make a jacket for them?

  13. #11
    mo balls than $cents$ IMPATIENT 1's Avatar
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    Quote Originally Posted by Crazyhippy View Post
    They use such cute little turbos too...

    How about something bigger? Do i have to make a jacket for them?
    lol, yeah, they are on the small side

  14. #12
    Senior Member TwinTurbo540's Avatar
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    Those are the same turbos I will be running on my 496 this next season, almost have the engine complete and ready to drop in the boat. Just cant beat the price on the turbos for what they are!

    I also just purchased Tony Skagens 19 eliminator daytona last week to put the new monster in, cant wait!

    Travis
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    If you think they might be 'lazy' spooling up, why not run the next smaller A/R and "stage 2 more wastegates"? "pick up the bottom and let her breath on top".

  16. #14
    Senior Member TwinTurbo540's Avatar
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    Mark,

    Are you going to run the standard 1.32 turbine housing's? What size housings are on the garrett's you have in the boat now? I steped down a little on mine and went with the 1.10's, I think they should work just fine but if not I will spend a little more and change to the 1.0's.

    Have you seen gordons 509 BBC that steve morris built for him? Twin s480's (80mm wheel's) with 1.32 housings. 2100 hp at 6700 on gas and steve thinks the turbos are a little to small for that 509!


    Travis

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