Which Blower

Discussion in 'PSI Superchargers Tech Questions' started by Shakedown, Jun 26, 2005.

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  1. Shakedown

    Shakedown Jr. Dragster

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    We are running a Dart BigM Block w/Big Chief hds w/callis crank and Brooks rods 990 fuel pump and a MSD Pro 12. We have a 14/71 Hi Helix and a R-980 Whipple any suggestions on which blower to run. Thanks for the space and any help.
     
    #1
    Shakedown, Jun 26, 2005
  2. Shakedown

    Shakedown Jr. Dragster

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    Bump
     
    #2
    Shakedown, Jun 26, 2005
  3. SMcLEMORE

    SMcLEMORE New Member

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    Whipple: more power and less maintenance.
     
    #3
    SMcLEMORE, Jun 27, 2005
  4. RBS

    RBS Authorized Merchant

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    WHAT KIND OF RACING ARE YOU DOING. JR
     
    #4
    RBS, Jun 27, 2005
  5. Shakedown

    Shakedown Jr. Dragster

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    We mud race. The track is 250ft. If I had not mentioned yet we run a clutch behind this RAT.
     
    #5
    Shakedown, Jun 27, 2005
  6. Mike Canter

    Mike Canter Top Dragster
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    The Whipple needs tons of RPM to make boost whereas the Roots makes boost at a lower RPM. It takes more power to drive a Roots than a Whipple. You have to re-stripe a Roots and a Whipple you don't. A Roots heats the charged air more than a Whipple. With a Roots you have to pull out fuel with RPM and a Whipple you have to add fuel with RPM. A whipple makes more boost/power than a Roots.

    The big question is if you can keep the RPM up high enough to support a Whipple, if so, then I would go for the Whipple.
     
    #6
    Mike Canter, Jun 27, 2005
  7. Will Hanna

    Will Hanna We put the 'inside' in Top Alcohol
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    i'd say go with the whipple for mud drags. my dad and george lapp ran a two wheel drive open truck for a few years in the late 80's-90's. the motor is freewheeling most of the track. the hot set up would be that with a 3 stage lock up clutch.
     
    #7
    Will Hanna, Jun 27, 2005
  8. Mudwrench

    Mudwrench Member

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    Now Wait just a minute here...I just bought my Whipple for Mud Racing too. I thought the Whipple was supposed to make boost faster than roots...Plus bigger gains on the top end also...
    Mudwrench
     
    #8
    Mudwrench, Jun 27, 2005
  9. Mike Canter

    Mike Canter Top Dragster
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    Yes the Whipple makes more boost but at high engine RPMs
     
    #9
    Mike Canter, Jun 27, 2005
  10. Mudwrench

    Mudwrench Member

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    Mike,
    What would your opinion be on the difference between Early Whipple and PSI screw...I know the overdrive is different, but in general would each create different Power Bands???
     
    #10
    Mudwrench, Jun 27, 2005
  11. RBS

    RBS Authorized Merchant

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    THIS IS TO SHAKEDOWN AND MUDWRENCH DO YOU GUYS HAVE A OVERDRIVE LIMIT I KNOW YOU RUN 300 FT. AND AS WILL STATES SCIM ACROSS THE TOP WITH LOTS OF WHEEL SPEED. IF YOU DON'T HAVE AN OVERDRIVE LIMIT THIS WHIPPLE WILL MAKE MORE POWER THAN YOU PROBALY COULD HANDLE. I HAVE SOME CUSTOMERS THAT RUN THEM IN THE SAND AND RUN IT 108 OVER ON ALCH AND CLOSE TO 80 ON ANOTHER WITH 60 PERCENT NITRO ON A 500 KB BOTH GUYS LOVE THEM. IF THERE IS NO OVERDRIVE LIMIT YOU CAN GET CREATIVE AND BUT NOT TO CRAZY THE ADVANTAGE YOU HAVE IS THE 300 FT TRACKS. GOOD LUCK AND SHAKEDOWN IF YOU NEED A WHIPPLE BLOWER SET UP I HAVE A NICE ONE THANKS JR
     
    #11
    RBS, Jun 27, 2005
  12. Shakedown

    Shakedown Jr. Dragster

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    Well Thanks for all the help. Will Hanna I believe you know my neighbors from Bay City. Now back to the blower, the whipple on the hemi was only turning 7000 on the big end. Some of the diff I am worried about is the block is only a BigM not a KB. The only advantge the RAT has is a smaller crank and longer rods. We were running the blower only 60 over on the hemi, were as I was going to put the blower at 40 over on the RAT, not unless there is some better advice??? Once again thanks for all the help!!!!
     
    #12
    Shakedown, Jun 27, 2005
  13. Will Hanna

    Will Hanna We put the 'inside' in Top Alcohol
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    the mud track shakedown is talking about is really quite different from what most mud racing tracks are. it's closer to a sand drag track in some ways. unless it has changed drastically in the past few years its a sandy clay mixed with the top soil. so its a lot harder mud than you see on some of the mud bogs on tv. it creates some pretty serious ruts you have to deal with off the line, and for the most part its flat and slick on the big end.

    a quick history lesson on the whipple....the tad od limit for a while was 52 over, and i think jay payne ran as quick as 5.48 like that...so you should make plenty of boost in the 40-60 od range. i also would be concerned with stepping on it with the big m block.

    i still think you're going to come out better any way you slice it with the whipple vs the roots. regardless of which blower makes more boost where, it takes so much power to turn that roots...not to mention maintenance.

    who is your neighbors in bay city?
     
    #13
    Will Hanna, Jun 28, 2005
  14. Shakedown

    Shakedown Jr. Dragster

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    Will Hanna my secretary is Kim Stewart, Buds daughter. George Lapp knows me very well also. I live about 15mins from the mud track. :eek:
     
    #14
    Shakedown, Jun 28, 2005
  15. Shakedown

    Shakedown Jr. Dragster

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    BUMP!!!! Thanks for the help everybody, I really appreciate it. Does anyone have any suggestions if 40 over and a dart digM will make it without pushing the bottom end out of the block? Thank you Shakedown
     
    #15
    Shakedown, Jun 29, 2005
  16. rpmhiperf

    rpmhiperf Blown Alcohol

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    Shakedown, I have several sanddrag customers that run the iron dart blocks with whipple r980's with as much as 60% over. We haven't had any main web failure. 300' is the savior. :cool:
     
    #16
    rpmhiperf, Jun 30, 2005
  17. Shakedown

    Shakedown Jr. Dragster

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    Hey rpmhiperf could you give me a call or leave a number were I can reach you. My number is 979-429-3533. Once Again Thanks for the help....
     
    #17
    Shakedown, Jun 30, 2005
  18. rpmhiperf

    rpmhiperf Blown Alcohol

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    You can call (616-669-7883) me at my shop on Tuesday. I'll be at The D3 race at Mid-Michigan the rest of the week. :D
     
    #18
    rpmhiperf, Jun 30, 2005
  19. Danny Humphreys

    Danny Humphreys Member

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    I ran a Big M w/ a whipple @ 62% over and never had a bottom end problem. Pulled it out becasue of weight and went with a KB Olds block and have had nothing but bottom end troubles since. i'd go back to the big M in a heartbeat, if i could get the car to work with the extra nose weight. I spoke w/ Jim Oddy about this and they ran a Big M for quite awhile when running Nitro coupe a few years ago. Also some of the fuel nostalgia guys ran them as well. It is a stout piece. i assume you are running the billet caps though.
     
    #19
    Danny Humphreys, Jul 2, 2005
  20. Mudwrench

    Mudwrench Member

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    Danny,
    Could you please elaborate on the bottom end of the KB Olds block. I am building a 10.700 Deck height 572 with a Whipple. I followed your suggestions by getting rid of the Rodeck 481 and going with KB block. Is there something querky I should watch for...or maybe just don't twist that whipple so hard?
    Mudwrench
     
    #20
    Mudwrench, Jul 3, 2005
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