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h.o. Impeller question
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Thread: h.o. Impeller question

  1. 04-08-2011, 05:44 PM #1
    415ss69
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    h.o. Impeller question

    my question is for those who have upgraded to the purple impeller is..
    1.Has anyone recorded HP gain on a dyno as compared to the stock impeller?

    2.if it is a 1-2lbs increase on a 302 what does it do for a 355ci engine?
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  2. 04-09-2011, 05:02 PM #2
    JPJP
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    CUND Racing on Ebay advertises 2-3 PSI boost increase. I am assuming they are claiming it is on a 5.0 engine.

    When my dad upgraded to the HO impeller on his '85 Corvette (350 cu-in) the claim was 1-1.5 PSI increase of boost. So around there. Of course these are all claims.

    I can tell you by the seat-of-the-pants dyno on both '85 Corvette and 5.0 Mustang the boost comes on a little earlier and much stronger at the lower RPMs.
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  3. 04-10-2011, 03:34 AM #3
    pavement pounde
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    On my 454 ci it was a 1 psi rais of boost.
    Greets, Marco
    '91 Chevy 496SS, Edelbrock Pro-flo 2 injection, alu. GMPP heads, blowercam, coolmist water injection, turbo in the works.
    *VIDEO* http://www.youtube.com/watch?v=6ZOdXg0TOdw
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  4. 04-13-2011, 10:19 PM #4
    415ss69
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    came out to a 1.5 lbs increase at about 5500 rpms
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  5. 04-14-2011, 08:22 AM #5
    Michael
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    Quote Originally Posted by 415ss69 View Post
    came out to a 1.5 lbs increase at about 5500 rpms
    1.5 psi increase isn't bad at all, especially considering the cost of the H.O. impeller. You've gotta be pretty happy with that, no?
    Michael
    www.superchargerhelp.com
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  6. 04-14-2011, 05:00 PM #6
    415ss69
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    im happy the boost seems to come in alot quicker
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  7. 04-14-2011, 05:31 PM #7
    Buck-Strickland
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    Time to head back out to the track?
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  8. 04-29-2011, 05:25 PM #8
    svt95cobra
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    i got 10lb of boost out of my sn89 fresh rebuilt with hi-output impeller. very impressed.
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  9. 04-30-2011, 02:22 AM #9
    pavement pounde
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    You guys measure the boost in the intake and not just behind the supercharger right?
    These are 2 different numbers.
    Greets, Marco
    '91 Chevy 496SS, Edelbrock Pro-flo 2 injection, alu. GMPP heads, blowercam, coolmist water injection, turbo in the works.
    *VIDEO* http://www.youtube.com/watch?v=6ZOdXg0TOdw
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  10. 04-30-2011, 02:12 PM #10
    415ss69
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    i get my boost reading off a 'tee' from my power brake booster hose
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  11. 05-05-2011, 10:11 PM #11
    winfred
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    i got just shy of 1.5# on my inline 6 bmw with boost coming on earlier
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