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Friends ls1

This is a discussion on Friends ls1 within the Camaro / SS forums, part of the Vehicle Specific category; My buddy recently bought an ls1 camaro. He had it dynoed and made 327rwh bone stock. He was trying to ...

  1. #1

    Friends ls1

    My buddy recently bought an ls1 camaro. He had it dynoed and made 327rwh bone stock. He was trying to tell me today that his car has around 380 horsepower when you factor in a 15 percent loss. IMO 380 is very, very generous for a stock car. Wouldnt it be more like 350?

  2. #2
    Junior Member Kamesense's Avatar
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    Is this through an A4 or an M6? Drivetrain loss will differ from auto trans to manual trans. Also, does it have the LS6 intake manifold?

    Ls1's may be able to put out some serious crank horsies, some have been dynoed stock at 400. (http://www.gmhightechperformance.com...ech/index.html)

    Although this is Corvette spec (different manifolds im assuming...?) I don't think it would be unreasonable to be near that.

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    Member c5z28's Avatar
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    350 at the crank but 327 is feasible with the 01-02 cars.

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    99/m6. I think 380 on a stock car is very high. I mean the vettes and gtos were not rated over 350.


    "2000-02 F-body is normally in the 305-315 range. If we factor in drivetrain losses of 10 to 15 percent depending on transmission types, theoretically the factory SAE net crankshaft rating could range from 335 to 362 hp"

    ^^ Found that interesting.

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    Member joedude02's Avatar
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    Quote Originally Posted by Mike0202 View Post
    dynoed and made 327rwh bone stock.
    that's one of them funny 'familiar' numbers if you know what i mean. but honestly, mine went 332rwhp with just a Borla catback and a volant system. it was on the uncorrected scale and 34 degrees though.

    forgot to add that there is a lot of variance of what really is 'bone stock'.

  6. #6
    Maybe the drivetrain loss isnt as much as we think.

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    Senior Member tatertot91's Avatar
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    Have him take it to another dyno

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    Miss October toi tyme's Avatar
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    I want to dyno my car.. NO clue what it makes haha ive always assumed 325

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    Moderator 35th-ANV-SS's Avatar
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    Some DYNO's are very happy. Also depends on whether this is on a Mustang DYNO or DYNO Jet. Mustang DYNO will read much lower; about 10% from what I have read about it.

    Those numbers aren't impossible, that's for sure.

  10. #10
    Quote Originally Posted by toityme View Post
    I want to dyno my car.. NO clue what it makes haha ive always assumed 325
    All ls1 cars, reguardless of model will make 350 Flywheel, which is right around 300 at the wheels. The F bodies were underrated in order to keep sales up on the Corvette. If you think about it. Who would buy a 350hp Vette when you could get the same power for half the price?

  11. #11
    Quote Originally Posted by 35th-ANV-SS View Post
    Some DYNO's are very happy. Also depends on whether this is on a Mustang DYNO or DYNO Jet. Mustang DYNO will read much lower; about 10% from what I have read about it.

    Those numbers aren't impossible, that's for sure.
    Yeah it has been done a few times. Just wondering if the ls1 was really THAT underrated.

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    Miss October toi tyme's Avatar
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    Quote Originally Posted by Mike0202 View Post
    All ls1 cars, reguardless of model will make 350 Flywheel, which is right around 300 at the wheels. The F bodies were underrated in order to keep sales up on the Corvette. If you think about it. Who would buy a 350hp Vette when you could get the same power for half the price?
    Good point!

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    Moderator 35th-ANV-SS's Avatar
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    I never had my car DYNO'd bone stock, but after the install of LTs, exhaust, lid, and K&N I DYNO'd 330whp on a Mustang DYNO. Assuming the 10% difference, on a DYNO Jet that would be 363whp.

    That is going through a 9", which is supposed to be 6% less efficient than a 10 bolt. Also a M6 and 2002, so I have the LS6 intake.

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    Member 98Hardtop's Avatar
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    Not bad numbers. I dynoed mine after Frost adjusted a few transmission settings and made some minor adjustments to the stock and tune put his on and with a lid, catback with the cutout closed on a 90 degree humid day I made 300/308 through an A4
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    Army Dude robcas47's Avatar
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    Well your buddy might be right on. By my math if he is a M6 with about 15% loss then at the flywheel he makes about 376hp. If he's an A4 with about a 18% loss then he's making about 385hp. Mabey he used the wrong percentage in his numbers, either way he's stioll close with his estimate, unless my math is wrong. what did he make for rwtq? Is he really stock? I've read through a few threads where people claim numbers on a "bone stock" car and then later say that they have headers or an aftermarket catback, lid, ect... If he is all stock then he's got himself a factory freak and even that isn't unheard of. I hope he really is making those numbers, he'll spend a lot less than most of us on getting to his power goals.

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    The LS1 f-body's were grossly underrated by GM, as they have the same engine as the Corvette. The advertised rating is more fitting for rwhp; If they had advertised crank, it would display to the general buying public as a rival to the more expensive and pristine Corvette, power wise.

    Quote Originally Posted by Mike0202 View Post
    99/m6. I think 380 on a stock car is very high. I mean the vettes and gtos were not rated over 350.


    "2000-02 F-body is normally in the 305-315 range. If we factor in drivetrain losses of 10 to 15 percent depending on transmission types, theoretically the factory SAE net crankshaft rating could range from 335 to 362 hp"

    ^^ Found that interesting.

  17. #17
    Quote Originally Posted by robcas47 View Post
    Well your buddy might be right on. By my math if he is a M6 with about 15% loss then at the flywheel he makes about 376hp. If he's an A4 with about a 18% loss then he's making about 385hp. Mabey he used the wrong percentage in his numbers, either way he's stioll close with his estimate, unless my math is wrong. what did he make for rwtq? Is he really stock? I've read through a few threads where people claim numbers on a "bone stock" car and then later say that they have headers or an aftermarket catback, lid, ect... If he is all stock then he's got himself a factory freak and even that isn't unheard of. I hope he really is making those numbers, he'll spend a lot less than most of us on getting to his power goals.
    He made 350wrt, right on the mark. Yes he is stock down to the filter. It was prob a happy dyno. 350 seems right for these cars.

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