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Thread: help with what hp im making

  1. #1
    Junior Member JOURNEYMAN
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    Dec 2005
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    Chelsea, OK
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    help with what hp im making

    I've been running a 406 sbc that is 9.25/1 cr with 10lbs of boost and brodix track 1's with a comp roller cam .575 .575. Now I goin to a 427sbc that is 10/1 cr and still 10lbs of boost same heads but I'm goin to a .644 .604 roller 7-4 swap blower cam! I'm wondering if anybody has a good guess of what power I was making and what I'm goin to b making!! Thanks

  2. #2
    Junior Member JOURNEYMAN
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    Dec 2005
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    I'm running a 420 mega blower with 2 750 holley's on gas heads have a little bit of port work and running 17/8's hooker super comp headers

  3. #3
    Junior Member JOURNEYMAN
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    Anybody

    anybody

  4. #4
    Senior Member DYNO OPERATOR
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    Apr 2008
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    504

    Not that simple

    To get the answer you are looking for you will have to give an average previous quarter mile performance and MPH along with the vehicle weight to calculate your previous combination's power level. once that is known a guess on what to expect from your new stuff will have some foundation based on your vehicle's set up.
    Any other path to your answer would require beer and lots of B.S. if you know what I mean.
    Bruce

  5. #5
    Senior Member DYNO OPERATOR
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    Well said Bruce! While I appreciate beer and a good bs session (bench racing), usually the results are dramatically different that real world performance......
    Johnny

  6. #6
    Junior Member JOURNEYMAN
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    [quote]well the 406 was in
    my mustang and was goin 10.10 at 141 then I built my new full chaasis vw which weights 300 lbs less it went a 9.80 at 128 on a soft pass then I sPun a rod bearing and now my new motor is going to b the 427 but I don't have it yet the short block is suppost to b shipped out Monday the vw was doing 1.30 60's the mustang was doing 1.41 60's both running 28" mt's with 3.89 gears 400 th 4500 converter

  7. #7
    Senior Member DYNO OPERATOR
    Join Date
    Apr 2008
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    504

    that helps

    [quote="melson3086"]
    well the 406 was in
    my mustang and was goin 10.10 at 141 then I built my new full chaasis vw which weights 300 lbs less it went a 9.80 at 128 on a soft pass then I sPun a rod bearing and now my new motor is going to b the 427 but I don't have it yet the short block is suppost to b shipped out Monday the vw was doing 1.30 60's the mustang was doing 1.41 60's both running 28" mt's with 3.89 gears 400 th 4500 converter
    If this mustang weight was at about 3500# and went 141 MPH it will take about 870 HP to do that, 750 HP if it weighs 3000#. You could do it with a little less and you could have had more than that on tap possibly. The lighter chassis info is not of any use for this answer having no good run on it. The couple more cubic inches might not help as much as you might expect if you can not trap as much air and fuel at TDC to make power with. More compression on a blown set up takes up space that fuel and air could reside to make more power with. The MPH will tell the story when you test the new engine set up, MPH is horsepower period. If you pick up 10 MPH is will be because the combination is happier together, not so much the added cubic inches.
    Sounds like it may be fun to drive too. I hope this helps you out with your question.
    Bruce

  8. #8
    Junior Member JOURNEYMAN
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    Dec 2005
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    Thanks

    Well the mustang only weighed 2800 lbs the bug weighs 2500 but over the winter I took the carbs apart to clean them I had one of my jets was out of the carb I knew it was supper fat but I just ran it that way I know where sum car performance calculators are but I was just wanting sum feedback about what anybody thought about my new combination any good or bad!

  9. Racing Junk


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