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What’s the HP gain from 3.5” to 3.0 pulley w/ Whipple 2.9 Crusher?

Discussion in 'Terminator Talk' started by GM2Ford, Dec 2, 2018.

  1. GM2Ford

    GM2Ford Active Member Established Member

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    Just wondering what kind of rwhp gain I can expect going from 3.5” pulley to 3.0” pulley on the 2.9 Whipple Crusher?
     
  2. roy_1031

    roy_1031 roy1031 Established Member

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    What’s the boost difference in going from a 3.5 to a 3.0?


    Sent from my iPhone using Tapatalk Pro
     
  3. me32

    me32 BEASTLY SHELBY GT500 TVS Moderator

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    Why not just put and lsx motor in it and be done lol
     
  4. ShootyMCstabby

    ShootyMCstabby Brownie Hound. Established Member

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    It's like guessing dog years.

    3.5P - 3.0P = 5 lbs of boost @ 20hp per 1lb =100hp.

    I have a 3.4/crusher. gained well over 100 hp & tq when going from a 4.0P to a 3.5P. But when I go to a 3.0P I don't expect to see that gain.
     
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  5. FLYIN

    FLYIN Warheads on Foreheads Established Member

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    Man thats going to be a lot of boost. I still have the smaller upper pullies and larger lower pullies from back when I ran a Whipple 2.3 but after running a 3.5 upper and stock lower with the 3.4 Crusher set up I saw 26# similar to what you see and that was enough for me. Haha. Nice build you have going on there.
     
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  6. Black Gold 380R

    Black Gold 380R Multiple SVT Collector Established Member

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    Yep, another post that requires a thumbs down button LOL..................
     
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  7. me32

    me32 BEASTLY SHELBY GT500 TVS Moderator

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    Let me know when you get that function to work. Lol.
     
  8. Black Gold 380R

    Black Gold 380R Multiple SVT Collector Established Member

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    LMAO!!! Been asking the administrators for years. Guess my requests have fallen on deaf ears LMAO!!! At this point I'd take a thumbs down emogi option in the smilies :D LOL.
     
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  9. InvisibleBlade

    InvisibleBlade Highway to Hell Established Member

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    Not a Whipple, but for what it's worth, I gained 50whp on my KB 2.8 with Behemoth intake, by dropping one pulley size (3"-2.75") with the stock lower.
     
  10. 01yellercobra

    01yellercobra AKA slo984now Established Member

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    I thought you were at 28? What's a couple more PSI?
     
  11. FLYIN

    FLYIN Warheads on Foreheads Established Member

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    Yea it will hit 28 and then settle out around 26. Usually run out of road really quick when you are doing that though. See 140's at the top of 4th. Haha.
     

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