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Thread: headers exh and tune

  1. #1
    Dave Golder is offline Cadillac Owners Member
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    headers exh and tune

    Here is the dyno sheet from the before and after with the headers, exhaust and tune. We didn't have the chance to do all the tuning work we wanted to as we had to dyno it with the pulley also. I will wait and post the pulley dyno until after we release some news at Barrett Jackson. Not sure how someone got 430RWHP and tuned to 470RWHP unless they were using a different dyno. Even then does not make sense. I know of four dynoed and all made between 462 and 473. I wish I could say headers and exhaust made 70RWHPhp but I can't




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  3. #2
    Nutz's Avatar
    Nutz is offline Cadillac Owners Connoisseur
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    Re: headers exh and tune

    Low-end torque (at 2500 r.p.m.) looks impressive. Doubled from baseline!
    Low-end torque= the much needed grunt for heavy car wheelspin.

    I bet the seat-of-the-pants meter feels that low-end grunt.

    Is the supercharger modified in any way?

  4. #3
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    Re: headers exh and tune

    What headers did you go with? What size?

    SG

  5. #4
    CVP33's Avatar
    CVP33 is offline Cadillac Owners Master
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    Re: headers exh and tune

    Quote Originally Posted by AERO1 View Post
    What headers did you go with? What size?

    SG
    See other thread. I believe they were custom built. 1 and 7/8?

  6. #5
    NormV is offline Cadillac Owners Connoisseur
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    I thought it was an automatic tranmission and could be torque converter spike.

    Norm

    Quote Originally Posted by Nutz View Post
    Low-end torque (at 2500 r.p.m.) looks impressive. Doubled from baseline!
    Low-end torque= the much needed grunt for heavy car wheelspin.

    I bet the seat-of-the-pants meter feels that low-end grunt.

    Is the supercharger modified in any way?

  7. #6
    Dave Golder is offline Cadillac Owners Member
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    Re: headers exh and tune

    Quote Originally Posted by CVP33 View Post
    See other thread. I believe they were custom built. 1 and 7/8?
    correct... custom made headers, burns collectors, xpipe

  8. #7
    Dave Golder is offline Cadillac Owners Member
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    Re: headers exh and tune

    Quote Originally Posted by Nutz View Post

    Is the supercharger modified in any way?
    It is now but not on that dyno run. Wanted a baseline with headers and exhaust.

  9. #8
    Jpjr is offline Cadillac Owners Enthusiast
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    Re: headers exh and tune

    Did you have to drop the k-member to install the headers? Are they custom?

    Numbers look good although a pulley swap would have made a lot more power than headers. Of course you would need to fab one up and find a belt that fits, which would be time consuming.

  10. #9
    gotapex is offline Cadillac Owners Member
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    Re: headers exh and tune

    Quote Originally Posted by Dave Golder View Post
    correct... custom made headers, burns collectors, xpipe
    Very nice, Burns makes quality stuff.

  11. #10
    Luna. is offline Cadillac Owners Connoisseur
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    Re: headers exh and tune

    OUTSTANDING results!

    I wouldn't mind sitting at about 500 rwhp as well.

    Then again, I want ~550 rwhp, so I'll need another 50...

  12. #11
    LV_V's Avatar
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    Re: headers exh and tune

    I'm liking what I'm seeing! Keep pushing the envelope!

  13. #12
    Luna. is offline Cadillac Owners Connoisseur
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    Re: headers exh and tune

    NOS be a good option? Too lame?

    I need 550rwhp...

  14. #13
    The Tony Show's Avatar
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    Re: headers exh and tune

    Quote Originally Posted by Nutz View Post
    Low-end torque (at 2500 r.p.m.) looks impressive. Doubled from baseline!
    Low-end torque= the much needed grunt for heavy car wheelspin.
    Umm....I'm seeing a 50ft/lb gain in the torque at 2,500, not double. If it were doubled, it would be putting out 800 at 2,500 rpm.
    Rest in Peace, J.D. (aka Dirt_Cheap_Fleetwood)

  15. #14
    Nutz's Avatar
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    Re: headers exh and tune

    Quote Originally Posted by The Tony Show View Post
    Umm....I'm seeing a 50ft/lb gain in the torque at 2,500, not double. If it were doubled, it would be putting out 800 at 2,500 rpm.
    Ya, I guess I could have worded it better.

  16. #15
    Razorecko is offline Cadillac Owners Connoisseur
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    Re: headers exh and tune

    Headers/exhaust usually show their power increase when a cold air intake is put in conjunction - how is the intake system on the v ? I'm sure even replacing the stock filter with a good flowing oem style filter like a "green filter" would bump out the #'s considerably.

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