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dyno question

This is a discussion on dyno question within the General Help forums, part of the LSx Technical Help Section category; Does a mustang dyno really give out a lower hp rating than what is actual. I was told that it ...

  1. #1
    Member sscrazy's Avatar
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    00 camaro ss

    dyno question

    Does a mustang dyno really give out a lower hp rating than what is actual. I was told that it could be up to 40 hp off. anyway I dynoed my car today and it came out 390 rwhp. this is with the stock intake. the tuner said that I need a 90mm fast intake and throttle body and It will increase about 50 at the tires. anyway if I dynoed at 390 on a mustang dyno does that mean that my actual is somewhere around 420-430 rwhp? I figured my hp would be alot more than 390 with my $10,000 motor!!!!
    00 ss camaro, 6.0 liter iron block, 4" callies crank, 4" Mahle pistons, Howards rods, Comp cam .598/.598, ported polished heads, Fast 90mm intake and tb flp headers and y pipe, lingenfelter muffler and tips, Maf, injectors, frame connectors.

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    Member sscrazy's Avatar
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    also the tuner said that MY intake was pulling vacuum around 4000 rpm. wich tells him that the intake is way too small.

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    Grand Imperial Wizard Sarge's Avatar
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    Basic explanation.....The Mustang Dyno provides resistance to the wheels based on the cars weight. This in effect will provide a more real world tune capability. A Dynojet is a "free spinning" mechanism with no resistance to the wheels....so bottom line is a Mustang Dyno will "dyno" lower RWHP numbers based on the resistance....my experience is around 15% +/-......now do not lose sight of the fact there are other variables which have an effect on the numbers...mainly temp/humidity....

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    member since may 2000 nhraformula's Avatar
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    mustang dyno gives more real world numbers.
    on a mustang dyno my car pulled 366 rwhp.
    2000 nhra edition formula
    a few bolt ons, 379 rwhp
    11.96 @113.25

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    Got Rice? Liquifire's Avatar
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    also I would be shocked to see you gain fifty rwhp if you put on the 90mm fast intake and tb. More likely to see twenty to thirty rwhp from this. If you have more cubes than stock it will be better than the above by a little so probably 30 to 35. Also, is your car an auto or a M6? This might make a big difference.......Do you have a twelve bolt I assume, because that uses a little more power than the ten bolt, etc......Even so......with 10K invested you should be able to get north of 450rwhp maybe even 500 imho.
    Last edited by Liquifire; 09-10-2005 at 02:26 AM.

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    Quote Originally Posted by sscrazy
    Does a mustang dyno really give out a lower hp rating than what is actual. I was told that it could be up to 40 hp off. anyway I dynoed my car today and it came out 390 rwhp. this is with the stock intake. the tuner said that I need a 90mm fast intake and throttle body and It will increase about 50 at the tires. anyway if I dynoed at 390 on a mustang dyno does that mean that my actual is somewhere around 420-430 rwhp? I figured my hp would be alot more than 390 with my $10,000 motor!!!!

    On my two cars, one recorded 19% less rwhp on a Mustang compared to a Dynojet & the other 18% less so 15% to 20% is likely a good estimation dependion on ambient conditions & how the Dyno is calibrated @ a given elevation.

    390rwhp is not a bad start & is more like 440 ish on that Mustang. Unrestricting an intake is always a good idea. This will help to increase the engines VE & should add HP. Make sure that if you go w/ the 90mm TB, intake, ported MAF that your filter is sized accordingly.

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    Grand Imperial Wizard Sarge's Avatar
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    Quote Originally Posted by nhraformula
    mustang dyno gives more real world numbers.
    on a mustang dyno my car pulled 366 rwhp.
    This is my signature. It is mine. Nobody else has one like it.

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