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  1. #21
    The FABRICATOR!


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    Do you feel the ls1 PCM is just as capable as the aftermarket ECM's?
    Chris
    1985 Monte Carlo SS
    Mods: 9:1 383 LT1, Ported Trick Flow heads, D1SC Procharger, 4L80E, 3.50 9"
    Check out the M122 MCSS build thread here!

  2. #22
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    I guess that is where my confusion in your statement is. In my opinion I don't believe the 24x is considered "aftermarket EFI". Did it come as a factory option on these cars? No, but there is many things in this class that were not a factory option on these engines/cars. I was under the impression this was the modified class.
    -David-
    1985 Camaro Z28 (Under Construction)
    1994 Firebird Formula - LT1/4L60e (The Daily)

  3. #23

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    yes....at least as far as to carry the same weight penalty...will it do everything that the FAST or Big Stuff will do, no...but it is light years ahead of the LTx pcm and opti

    I approved the rules as written and posted ....I have yet to see any LTx car come with the 24x system form the factory...the purpose of the penalty for Aftermarket EFI and carb, was to give a small break to anyone still running the OE PCM....the 24x cannot be allowed to run heads up against the OE system
    1994 Formula, 396cid, AFR 227's, Single plane, and 2 of the big ones.
    http://ltxtech.com/forums/image.php?type=sigpic&userid=241&dateline=12653889  02

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  5. #24

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    Quote Originally Posted by muddyjimmy View Post
    I was under the impression this was the modified class.
    yes it is the Modified class....and why aftermarket EFI is allowed, with a weight penalty

    24x in extreme street is not as much of an advantage due to limiting operating RPM via intake manifold, head choices, and camshaft
    1994 Formula, 396cid, AFR 227's, Single plane, and 2 of the big ones.
    http://ltxtech.com/forums/image.php?type=sigpic&userid=241&dateline=12653889  02

  6. #25
    The FABRICATOR!


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    Quote Originally Posted by Chopstix View Post
    yes it is the Modified class....and why aftermarket EFI is allowed, with a weight penalty

    24x in extreme street is not as much of an advantage due to limiting operating RPM via intake manifold, head choices, and camshaft
    So if 24 X isn't a big deal in extreme Street, aftermarket ECM's shouldn't be either then right?
    Chris
    1985 Monte Carlo SS
    Mods: 9:1 383 LT1, Ported Trick Flow heads, D1SC Procharger, 4L80E, 3.50 9"
    Check out the M122 MCSS build thread here!

  7. #26

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    ...24x carries a weight penalty in Extreme street as well....the issue is it should carry a weight penalty in modified as well...the rules state it exactly that way
    1994 Formula, 396cid, AFR 227's, Single plane, and 2 of the big ones.
    http://ltxtech.com/forums/image.php?type=sigpic&userid=241&dateline=12653889  02

  8. #27
    LTXTech Sponsor


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    If it is that much of an advantage what is the weight penalty going to do?
    We are trying to get car count, especially the turbo guys to show up.
    2013 King of Street & ES/PA Champ

    1979 Chevy Monte Carlo 383,Stock Ported Heads, 4L80 with Edge converter, QP 9", Nitrous Outlet Plate Kit
    Certified Performance & Auto Repair Inc.

  9. #28

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    200# is a 1-2 tenth difference...can the aftermarket EFI system make up that difference, absolutely...you guys are splitting hairs over something that the rules clearly state...aftermarket EFI carries a 200# penalty.

    so the question is...Is the 24x the OE equipped PCM on the LTx platform...if it isn't, which we all no it isn't...it carries a 200# penalty.
    1994 Formula, 396cid, AFR 227's, Single plane, and 2 of the big ones.
    http://ltxtech.com/forums/image.php?type=sigpic&userid=241&dateline=12653889  02

  10. #29
    The FABRICATOR!


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    I can't see penalizing a MODIFIED car (next step outlaw) for a 24x system. How about a weight break of 100# for lt1 pcms?
    Chris
    1985 Monte Carlo SS
    Mods: 9:1 383 LT1, Ported Trick Flow heads, D1SC Procharger, 4L80E, 3.50 9"
    Check out the M122 MCSS build thread here!

  11. #30
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    What about 100 lbs for 24x. I do agree it is a big advantage over a stock ecm but it's not nearly as good as a aftermarket ecm.
    http://ltxtech.com/forums/image.php?type=sigpic&userid=3572&dateline=1317253  626

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