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Dismal Dyno results

This is a discussion on Dismal Dyno results within the GTO forums, part of the Vehicle Specific category; Got the GTO dyno'd today. I must say I was a little disappointed. 313.43/315.40 HP/TQ Highest 309.65/312.29 lowest of the ...

  1. #1
    Senior Member slims00ls1z28's Avatar
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    2005 GTO M6 Black
    2000 Z28 A4 Red

    Dismal Dyno results

    Got the GTO dyno'd today. I must say I was a little disappointed.
    313.43/315.40 HP/TQ Highest 309.65/312.29 lowest of the 3 pulls peak Hp at 5700. A/F is definately off registering around 10.9 but dang I expected at least 330 from a "400" hp car stock(ish).

    Pretty much stock of course gutted mufflers (sure that didn't hurt) and descreaned MAF (was already done). Paper filter. 60,509 miles. Going to replace fuel filter tomorrow and check all the plugs wires. Car doesn't miss any that I can tell but 313 sure seems mighty off.

    Only thing I can say is I never realized that from 3200-about 5300 the Torque curve is almost completely flat and followed the 300 line through that whole duration.

  2. #2
    Member Spieldawg's Avatar
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    Phantom Black Metallic
    2004 GTO M6

    wow I had to make sure you had an 05.. those numbers are closer to the LS1. Your AF is whacked.. get a tune, and re dyno.

  3. #3
    Grand Imperial Wizard Sarge's Avatar
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    Looks like your tune is way out of whack.

  4. #4
    rednari
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    He is a little off, but not by that much. A stock 364 in good tune only develops about 320-330 to the wheels. A stock 346 puts out 290-305. He also has a slush box (automatic tranny) which also lowers output.

  5. #5
    Grand Imperial Wizard Sarge's Avatar
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    No he has a M6....

  6. #6
    rednari
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    Then he needs some help. But realistically a new tune on that set up may give him an extra 10-15 HP, which of course is worth it. But, there are plenty of goofs out there who think a new CAI and a tune will give them 370 to the wheels. Ha Ha!

  7. #7
    Senior Member slims00ls1z28's Avatar
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    2005 GTO M6 Black
    2000 Z28 A4 Red

    Plug wires started to corrode some and the terminals (on the plug) had some too. Plugs looked OK to have 60K on them. Damn Northern car should have guessed that seeing how most of the unpainted parts under the hood have salt corrosion. Especially most of the aluminum bits. Camaro probably won't be running for a while so the MSD wires ended up on the GTO, debating on whether to use the TR55's. Wife said she noticed a difference. I couldn't really tell. Oh well not about to spend another 50$ on a dyno just to see if that worked though.

  8. #8
    doesn'tplaywellwithothers superchargedblackgto's Avatar
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    Well, what kind of dyno?....was it a mustang....if so it will read lower than a dynojet...if it was a dynojet then your #'s are low....on a dynojet with cai, LT headers, and exaust it my car was 332rwhp '04 with ls1....IDK if that helps but check that out.
    Brad
    Last edited by superchargedblackgto; 06-02-2008 at 07:23 AM.
    '04 gto M6 slp ceramic coated headers,B&m sport shifter,harrop cover,3.5"aluminum BMR driveshaft, BMR axle stubs, BMR Half shafts, BMR SFC's, loudmouth2 exaust,90mm FAST T/B,Magancharger(high helix upgrade)......other misc. suspension,Cross drilled, slotted rotors. Meth Kit, spraying @ 3psi and up

  9. #9
    Senior Member Hurley711's Avatar
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    414 RWHP 395 RWTQ
    00 Black Ram Air Trans Am

    Does not having the MAF screen in there affect anything? I've read the numerous "Leave them be" threads, could that be hurting the car?

  10. #10
    Grand Imperial Wizard Sarge's Avatar
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    Yes

  11. #11
    Member ksupersport02's Avatar
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    2002 SS Camaro LE

    Dyno Number

    Hey Man,

    Remember what they say,, Dyno guy make or break your day

    Plus different dynos pull different numbers..

    MUSTANG DYNO= Lower numbers

    DYNOJET= high numbers

    THis is obviously my opinion, but i have seen this with my cars and my friends..

  12. #12
    Member Spieldawg's Avatar
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    Phantom Black Metallic
    2004 GTO M6

    I wouldn't ever de screen the MAF.. Its obviously there for a reason... Every stock 05/06 GTO I saw pull on the dyno (DynoJet) none were below 335 RWHP. My friends bone stock 06 put down 353 rwhp with 1200 miles on it..

  13. #13
    Grand Imperial Wizard Sarge's Avatar
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    Quote Originally Posted by ksupersport02 View Post
    Hey Man,

    Remember what they say,, Dyno guy make or break your day

    Plus different dynos pull different numbers..

    MUSTANG DYNO= Lower numbers

    DYNOJET= high numbers

    THis is obviously my opinion, but i have seen this with my cars and my friends..
    I agree friend....I tune on the street/strip......fuck a dyno....

  14. #14
    rednari
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    So, we are back were we started. If the dyno session was performed on a Mustang Dyno, then a reading of 310 to the wheels is OK.

    The bottom line is not what HP dyno shows, but what your ET is. ET is the only true performance measure.

  15. #15
    Senior Member slims00ls1z28's Avatar
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    2005 GTO M6 Black
    2000 Z28 A4 Red

    Dynojet. Forgot to mention that. Disappointed in the results but the car still feels alot stronger than my Camaro did stock so I'm not taking it to heart, at least I found out one minor problem and fixed it. As far as calibration goes the guy behind me had a GX3 cam headers, magnaflow catback running fat as well (11 something) and pulled 409 through an M6. Guy behind him with same setup through an auto pulled 380+. Pretty sure mine was off a bit. I'll be looking for a MAF with screen probably too.
    Last edited by slims00ls1z28; 06-03-2008 at 02:40 PM.

  16. #16
    Grand Imperial Wizard Sarge's Avatar
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    Descreening the MAF fucks these cars all up.

  17. #17
    doesn'tplaywellwithothers superchargedblackgto's Avatar
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    Quote Originally Posted by Sarge View Post
    Descreening the MAF fucks these cars all up.
    Mine is descreened........However it has to be....
    Brad

  18. #18
    Grand Imperial Wizard Sarge's Avatar
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    I aint even got a MAF at all smartass

  19. #19
    doesn'tplaywellwithothers superchargedblackgto's Avatar
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    Quote Originally Posted by Sarge View Post
    I aint even got a MAF at all smartass
    You knew that was comming.....You act like your suprised I'm a Smart Alick Sarge?.....LOL

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