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dyno question

This is a discussion on dyno question within the Dyno Information forums, part of the Racing Forums category; I HAVE A 98 CAMARO Z28, With mac, headers off road y pipe borla catback, slp pulley, slp cold air ...

  1. #1
    Junior Member 98 ls1's Avatar
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    1998 camaro Z28

    dyno question

    I HAVE A 98 CAMARO Z28, With mac, headers off road y pipe borla catback, slp pulley, slp cold air kit, fast 90mm intake with 90mm tb, comp cam 232-234duration with 595-598 lift intake-exhuast, yank 2800 stall, 323 gears, free mods, valve springs push rods, stock mass air flow, it dynoed 370 hp rwhp 368 ft ibs torque with 99.5 degrees and hummidity 14%, uncorrected on a dyno jet dyno does this seem right i was hoping for at least 390 what do ya'll think thanks for the advice

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    Member jrgswhitels1's Avatar
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    1993 Camaro Z28

    My buddy has 85mm t/b,prof. prod. intake,stock injectors,LT's pacesetters,224/224 cam with comp.918's,SLP lid, ported MAF,4000 stall with 3;73 gears with a tune. He did 372 hp at the rear! The dyno at one of the shows had some problems getting a reading because of the converter!! With that cam, and without a tune, it really isnt bad!! Get a tune!! That will wake your car up! You could make 400 easily!!

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    Senior Member BLKCLOUD's Avatar
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    Quote Originally Posted by 98 ls1 View Post
    I HAVE A 98 CAMARO Z28, With mac, headers off road y pipe borla catback, slp pulley, slp cold air kit, fast 90mm intake with 90mm tb, comp cam 232-234duration with 595-598 lift intake-exhuast, yank 2800 stall, 323 gears, free mods, valve springs push rods, stock mass air flow, it dynoed 370 hp rwhp 368 ft ibs torque with 99.5 degrees and hummidity 14%, uncorrected on a dyno jet dyno does this seem right i was hoping for at least 390 what do ya'll think thanks for the advice
    If you want to see 390 RWHP uncorrected, just wait till the winter and then redyno.

    However, the better idea is to find out what you car makes when corrected to SAE (typical). At 99.5 deg, correcting to SAE (even without knowing the barometric pressure) would probably net a 3-5% increase in power. That means 370 RWHP would become ~380-390 RWHP, putting you very close to what you thought you should make.

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    Senior Member BLKCLOUD's Avatar
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    B2300 (Fluffy) Retired
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    PS....if you dyno'd in/near Gulfport Ms, I can assure you that your humidity was nowhere near 14%!

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    Slow'er'Ass Mr. Luos's Avatar
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    Who tuned it??

    Also, the numbers sound fine. Stall can eat up some power, plus the heat.

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    Junior Member 98 ls1's Avatar
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    sounds good thanks for the help i am going to put new mass air flow 85mm and a little more small stuff and go back on a cooler day thanks again

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    Junior Member 98 ls1's Avatar
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    running with the devil did the tune and thats what the temp was in the building 99.5 and shows humidity was 14% going by my dyno sheet thanks again

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    Slow'er'Ass Mr. Luos's Avatar
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    Stick with your stock MAF.
    Just trust me. The aftermarket ones aren't calibrated as well, and will require a tune.
    2008 Trailblazer SS
    Yank PTB3600, Kooks 1 7/8" LT's, 4" intake, E-fans, Magnaflow, Sonnax kit, tranny cooler, tune.
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    1999 Pontiac Trans Am WS.6 #1747 SOLD
    531.1 RWHP 481.3 FT/Pounds all motor.

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    Junior Member 98 ls1's Avatar
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    what about one from a 6.0 truck it is a 85mm and iam bringing it back to get retuned thanks again

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    Slow'er'Ass Mr. Luos's Avatar
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    Stocker is best. Good for 500+ HP.

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    Junior Member 98 ls1's Avatar
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    sounds good thanks

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    Senior Member BLKCLOUD's Avatar
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    Quote Originally Posted by 98 ls1 View Post
    running with the devil did the tune and thats what the temp was in the building 99.5 and shows humidity was 14% going by my dyno sheet thanks again
    Not atypical for a dyno. The hygrometer in the machine is obviously out of calibration, because as you know, southern Mississippi in the summer time is HOT and HUMID!

    Regardless....ask your dyno operator for an SAE corrected version of your dyno pass. That should be just a matter of a few keystrokes and hitting the print button.

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    Junior Member 98 ls1's Avatar
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    will do when i go back in a month thanks for the info

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    Member jrgswhitels1's Avatar
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    Agree, stick to the stocker and have it ported/polished!!! Aftermarket units are really tuff to tune!! Really hard to re-map fuel/air!

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