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hp question

Discussion in 'The Hokey Ass Message Board' started by katmandoo, Oct 7, 2006.

  1. katmandoo
    Joined: Oct 4, 2006
    Posts: 30

    katmandoo
    Member

    hello i have a question i was looking at buying a 350 motor from a guy and he told me that it was around 430hp!
    based on the following specs does this sound right?
    specs 1.94 cam-shortened springs and ported
    trw pistons 9.1 compression
    cam is edelbrock 5.12 lift cam
    long tub headers
    performer intake
    holley street avenger carb
     
  2. ratstar
    Joined: Feb 22, 2005
    Posts: 1,313

    ratstar
    Member

    I'm doubting it. But maybe. I guess it could be done. I just dont see how. How does he have any kind of idea what it put out? Did he have it dyno'ed?
     
  3. Russco
    Joined: Nov 27, 2005
    Posts: 4,397

    Russco
    Member
    from Central IL

    I would say its not very likely.
     
  4. katmandoo
    Joined: Oct 4, 2006
    Posts: 30

    katmandoo
    Member

    well what do you think it is based on numbers? i see crate engines 350 that say 400hp. what would be different in those,
     
  5. katmandoo
    Joined: Oct 4, 2006
    Posts: 30

    katmandoo
    Member

    i mean what could i say to challange him based on what he has,, could it be close to 400?
     
  6. skajaquada
    Joined: Sep 14, 2004
    Posts: 1,642

    skajaquada
    Member
    from SLC Utard

    with a little more accurate specs it would be a lot easier to say. see what more specific info you can get from him.

    i do have to say though, that with only 9:1 comp it's not very likely to have anywhere near that power.
     
  7. katmandoo
    Joined: Oct 4, 2006
    Posts: 30

    katmandoo
    Member

    what more would you need standard bore 2bolt block 3970010 from 69-79 rated at 185low hp to 370high hp
     
  8. skajaquada
    Joined: Sep 14, 2004
    Posts: 1,642

    skajaquada
    Member
    from SLC Utard

    well the overall cam specs would help. is the intake a plain performer or is it the RPM...and maybe i'm just ignorant but i don't understand "1.94 cam-shortened springs" to get 430hp out of a 350, you need to do some serious work and it'd hard to see with such abbreviated specs. were the heads bench/flow tested or were they just port matched? but like said before, it's just hard to see that w/ such relatively low compression unless there's been more extenxive stuff done on top of that.
     
  9. It's all in the combination. Compression ratio, cam specs, intake style, carb size, and good ignition all need to work together. The whole engine is only as good as the weakest link.
    I would say buy a book, there are about ten-million books on small chevys and anyone of them can give you alot of different ways to reach the kind of power your looking for.
     
  10. Rich Rogers
    Joined: Apr 8, 2006
    Posts: 2,018

    Rich Rogers
    Member

    I'd say get the numbers off of the back of the block and research those to find out what the motor started out as. Then given the parts and work you listed it would still be hard to get 430 hp unless maybe it was an LT1 with maybe aluminum heads. Don't let HP ratings fool ya though because a lower hp rated motor even can run strong depending on trans selection and rear end gear.The lower the gear the more fun runnin it through the gears to a point unless you get too steep a gear then goes any fuel economy
     
  11. scottybaccus
    Joined: Mar 13, 2006
    Posts: 4,109

    scottybaccus
    Member

    Go to gm performance parts catalog and you will see similar specs making less than 350.
     
  12. flamedabone
    Joined: Aug 3, 2001
    Posts: 5,766

    flamedabone
    ALLIANCE MEMBER

    Horse power numbers are like 1/4 mile ets.

    You can say, this car outta run 11s just like you can say this motor makes 430 horse.

    You can SAY anything. To back it up is something else.

    For the record. A 430 horse small block Chevvie can be done, but it's not terribly cheap nor is it terribly common. Check out GM Performance parts and thier dyno proven 430 hp crate motors. And check out the price tag...

    -Abone.
     
  13. george jackson
    Joined: Jul 23, 2006
    Posts: 70

    george jackson
    Member
    from socal

    You guys missed the joke. Reread those specs carefully!
     
  14. jalopy43
    Joined: Jan 12, 2002
    Posts: 3,085

    jalopy43
    Member Emeritus

    ??? I have heard of 1.94 valves,but what are 'cam shortened'springs?Broken springs? .512 lift on the cam? That would bend the valves..upon hitting the 'ported pistons" get the facts/specs in writing before you spend any $$$..:confused:
     
  15. Bugman
    Joined: Nov 17, 2001
    Posts: 3,483

    Bugman
    Member

    I'm having one of my "slow" days. care to clue me in?
     

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