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Dyno'd with the D1

This is a discussion on Dyno'd with the D1 within the Forced Induction forums, part of the LSx Technical Help Section category; Best I could get was 548 rwhp 563 rwtq on 10#. I didn't gain anymore boost. But under the curve ...

  1. #1
    Blown, Stroked, & Sprayed

    Ed Blown Vert's Avatar
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    Thumbs down Dyno'd with the D1

    Best I could get was 548 rwhp 563 rwtq on 10#. I didn't gain anymore boost. But under the curve I gained quite a bit.

    Blue line is the P1. Red line is the D1



    Blew the plenum twice on the dyno


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    Blown, Stroked, & Sprayed

    Ed Blown Vert's Avatar
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    I did have them weld the whole plenum and add two center supports. It held on the next two runs, but the hoses didn't


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    Damn.. that's the second car I've seen that happen to. Crazy.

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    Member 4tun8's Avatar
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    Red line is like a whole point leaner too though....something to take into consideration at that power level. A whole point could be 40hp, or it could be none, but there is a change in the fuel there.

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    ;) Packy's Avatar
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    Damn man I made 561 hp/544tq with a 346ci and a P1SC @ 9 psi... Something is up there. I think you are getting some belt slip or something. What are your IAT's and timing at WOT looking like?
    1999 Trans Am WS6 Black - Forged 346, P1SC (8psi), TH-400, and 12 bolt(3.73's)
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    2004 Screaming Yellow Mustang Cobra - Whipple 2.3, Exhaust, & CCW's...My DD

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    Quote Originally Posted by 4tun8 View Post
    Red line is like a whole point leaner too though....something to take into consideration at that power level. A whole point could be 40hp, or it could be none, but there is a change in the fuel there.
    I don't trust the dyno's WB. I tuned with my wideband and theirs were a point off. My AFR was 11-11.5

    We also dyno's my friends vette who also had a wideband. And his showed 1 point off too.

    Quote Originally Posted by Packy View Post
    Damn man I made 561 hp/544tq with a 346ci and a P1SC @ 9 psi... Something is up there. I think you are getting some belt slip or something. What are your IAT's and timing at WOT looking like?
    Your telling me. If the powerband kept climbing, I could have hit 600. IAT's at the end of the run were 120*. timing is 18*.

    Do you have a dyno sheet you can post? I want to compare the power under the curve.

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    ;) Packy's Avatar
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    Here is my last dyno sheet.


  8. #8
    Blown, Stroked, & Sprayed

    Ed Blown Vert's Avatar
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    No rpms, hard to compare.

    Removed the 3.0 and installed the 3.2 pulley. Couldn't get the 3.4 installed, belt was too short.

    Must still be slipping. When I get on it, I hit 10# right away, then very slowly I will hit 11# and thats spinning it to 6500.

    Also IAT's go from 85* to 135* and this was on a very cool night.

    Will pick up another belt and try the 3.4

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