Want to change from pro charger to roots
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Want to change from pro charger to roots

  1. #1
    Member zx14's Avatar
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    Default Want to change from pro charger to roots

    I have a 500hp efi built up to 540 with dart pro 1 heads blower pistons bigger injectors and a m1 pro charger at 8 lbs when I can get the belt tight enough. I want to go to a roots type blower.
    questions.
    i like the looks of a big belt 10 or 1271.
    a whippile is more efficient is the 500 efi stage 2 big enough?
    Is there really enough difference between the whipped and the standard roots typ if you go big?
    anybody try the rootz injection system?
    How much you think I can sell the pro charger for?

    All this is on my 2003 26 Daytona, runs over 100 any day with a 32p

    Thanks all

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    280 Profile Cat W/575sci JRider's Avatar
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    Whipple will be more efficient...but is it worth the money? If you go 10-71 or 12-71 you will still make a lot of power for a lot less...depending on what you use for a fuel system.

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    Member D Johnson's Avatar
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    All things being equal the Whipple will make at least 100 more HP as compared to a roots at same boost levels. Whipple is much more efficient and lots less heat. Call Whipple they will give good advice on product to use in your application. I personally think the Whipple is worth the money. Whipple consumes far less HP to run which results in more useable HP and is "easier" on the engine.

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    280 Profile Cat W/575sci JRider's Avatar
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    100hp? Possibly intercooled whipple vs nonintercooled roots...and that would vary on displacement as well.

    There is also a point where a 3.3 whipple will be out of lungs...then you get into the quadrotors and 4/5liter whippe $$$$$$$

    PSI blowers are another option

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    Member D Johnson's Avatar
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    I have 5 litre Whipples on my motors. All Whipple blowers by their inherent design consumes much less HP to drive the blower vs Roots style. Whipple also produces much less discharge temperature. I have seen dyno before and after roots to Whipple and at same boost Whipple always outperforms the Roots significantly.

  8. #6
    Highaboosta Unchained's Avatar
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    I never owned a screw blower but I have seen many of them in industrial air compressor applications.
    It's mind boggling how many hours they put on them in a big shop.

    I bought and sold a few and was amazed at the hour meter.
    One had run 40 hrs per week for over 20 years while making 100 psi.
    I sold it to another die shop and they have ran it ever since.
    Pretty impressive durability.
    Last edited by Unchained; 09-04-2013 at 02:55 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

  9. #7
    Ain't Right Racin piston in the wind's Avatar
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    Screw it
    QE 2050 W/ a Junk ass screw blower

    90% of the game is half mental... The pursuit of the unknown is priceless & gratifying . Sometimes it just takes good old fashion balls. No amount of reasoning or evaluation can deem it right or wrong. At the end of the day stick with whatever gives the person in question morning wood LOL

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    Member zx14's Avatar
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    Thanks for your input, it probably makes more sense to screw it, due to I have the bigger injector already for the pro charger, hopefully big enough". And I assume the big fuel system will be fine on a screw, this motor is not just a bolt on pro charged, I did all the goodies to make it work write, the efi was tuned, no pressure regulated fuel adder thingy that pro charge sells. I see on GT Mariens site they show screws with big cog belts, I wanna go this route.

  11. #9
    Member D Johnson's Avatar
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    I think this is a wise decision. If you have a well built motor and drive line that can handle the power take a look at the 4 litre or 5 litre with built in injection, bad ass technology. Good decision on cog belt if over 12 lbs of boost. I run serpentine at 12 lbs and it will slip occasionally if the motors zing like when the props lose grip.

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    Or could put a cog belt on your procharger

  13. #11
    280 Profile Cat W/575sci JRider's Avatar
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    If that procharger shares engine oil, ditch it.

  14. #12
    Member zx14's Avatar
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    Nop she is self contained. Sounds like some say the whippel is just amazingly more efficiant. I dont know but i would guess it would be better to have injectors near the heads, rather than your air fuel mixture going through the blower? Then again maybe the fuel gives the blower just a little bit of lube and makes it last a little longer?QUOTE=JRider;2544521]If that procharger shares engine oil, ditch it.[/QUOTE]

  15. #13
    280 Profile Cat W/575sci JRider's Avatar
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    The fuel charge cools the blower

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    If you run a Roots with strips, you will need to run at least 70% of your fuel through the blower for lubricating the strips.

    I worked for a guy who did a BDS EFI hat on top of a Littlefield 8-71 making ~1070HP (I don’t remember which race gas). Ultimately, the conclusion that was arrived at was that the fuel droplets were too fine of a mist to properly lubricate the strips that kept burning up.

    Cheers,

    Joe

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