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Thread: need help with cpu dyno
          
   
   

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  1. #1
    maineevent is offline CHR Member Visit my Photo Gallery
    Join Date
    Oct 2006
    Location
    Romulus
    Car Year, Make, Model: 78 chevy malibu
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    40

    need help with cpu dyno

     



    Finally putting block together wont be a roller this year. but if you guys could help me with a computer dyno that would be great 400sbc + 0.40 block speed pro FT pistons 5.7 rods 3.75 crank 9:8:1 compression 441 heads 76cc ported polished milled. block is zero decked cam i Have two. comp 268XE= @50 224 in 230 ex lift 0.477 intake 0.480 exhuast. the other is a Comp 274XE= @50 230 in/236ex lift intake .0487 exhuast .0490 both are hyd cams waiting for dyno to see which one to put in air gap performer intake ,holley 750 carb 1 5/8 full length headers thanks for all the help

  2. #2
    Autometer is offline CHR Member Visit my Photo Gallery
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    Jun 2007
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    Houston
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    I had stock flow numbers for the 441 but since you said yours were ported, I just bumped the numbers up some assuming you had 2.02/1.60 valves.

    XE268H 1st
    XE274H 2nd
    XE284H 3rd

    I have a lot of other cam files if you want to try something else. Have flow numbers by the way?
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    Last edited by Autometer; 06-18-2007 at 09:26 PM.

  3. #3
    maineevent is offline CHR Member Visit my Photo Gallery
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    thanks

     



    thanks alot autometer i can sell the 274 cause their s not much of a power difference and the 268 seems more streetable. new heads and a roller cam next year should get me deep in the 400 hp range

  4. #4
    Autometer is offline CHR Member Visit my Photo Gallery
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    Here's with the XE274HR
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  5. #5
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    555rod is offline CHR Member Visit my Photo Gallery
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    Melbourne, Australia
    Car Year, Make, Model: 34 3 window coupe
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    How accurate do you think this program is??

  6. #6
    maineevent is offline CHR Member Visit my Photo Gallery
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    have to make an adjustment

     



    northen auto sent me the wrong pistons so now i have the KB pistons with a 7cc relif and their 10:1:1 this is higher than i wanted but they said they cant get any full floating pistons in from federal mogul so they just sent me the pressed pins so be careful when dealing with them i guess i'll be running 94 oct an some octane booster but i wont be driving it much anyway so that wont be a problem will this boost my horsepower the slight compression change

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