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CJ Manifold TRASH???

Discussion in '5.0L Coyote V8 Engine Modification/Discussion' started by Supreme_5oh, Aug 28, 2018.

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  1. Aug 29, 2018 #21
    Supreme_5oh

    Supreme_5oh New Member Established Member Beer Money Bros.

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    havent posted a photo on here before.. how would i do that?
     
  2. Aug 29, 2018 #22
    lOOKnGO

    lOOKnGO Keep'um smiling Established Member

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    Is the trash manifold for sale!


    Sent from my iPhone using Tapatalk
     
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  3. Aug 29, 2018 #23
    stang910

    stang910 Active Member Established Member

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    Click upload a file under the reply box and select your pic
     
  4. Sep 1, 2018 #24
    DarkMach1

    DarkMach1 Well-Known Member Established Member

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    Stops pulling on the graph at 6900? Who tuned this VMP? lol! Get on the dyno and have your tuner tune it. Get a twin 67mm TB if you dont have one.
     
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  5. Sep 2, 2018 #25
    Saleen_1977

    Saleen_1977 Member Established Member

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    Is the Cobra Jet for sale?
     
  6. Sep 4, 2018 #26
    96gt02

    96gt02 Well-Known Member Established Member

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    even if they make the same peak number I guarantee that CJ goes flat till 8K and the holley drops like a rock
     
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  7. Sep 4, 2018 #27
    Supreme_5oh

    Supreme_5oh New Member Established Member Beer Money Bros.

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    Actually my local tuner was the one who tuned it, and yes i already have the twin 67tb on it.. im looking to see if i can find a different tuner atm..
     
  8. Sep 4, 2018 #28
    Supreme_5oh

    Supreme_5oh New Member Established Member Beer Money Bros.

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    yes that is true, the CJ went flat @6900 rpms or so and the holley actually kept climbing until about 7200 which then drops very quickly while the cj still flat after that drop @6900
     
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  9. Sep 7, 2018 #29
    joshdj13

    joshdj13 Active Member Established Member

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    To only have dropped 2 hp but have the tq gain. I'd say just for that it was worth the swap.

    Sent from my SM-G920V using the svtperformance.com mobile app
     
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  10. Sep 7, 2018 #30
    HISSMAN

    HISSMAN The Great Bearded One Staff Member Super Moderator

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    Need graphs to really see what is going on. Both will breath great up top. The CJ will make more torque than a BOSS or Holley. And I see it did exactly that.
     
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  11. Sep 7, 2018 #31
    B7BlownSnake

    B7BlownSnake Active Member Established Member

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    The CJ on my Boss didn't feel like it fell off. It was pulling hard until 8000.
     
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  12. Nov 12, 2018 #32
    Big JROD

    Big JROD New Member Established Member

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    VMP did an intake swap not to long ago. You can find it on YouTube. Ported 2018 Manifold was the winner. And it's so much cheaper than CJ or GT 350!
     
  13. Nov 20, 2018 #33
    boduke0220

    boduke0220 Well-Known Member Established Member

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    you need a monoblade
     
  14. Nov 23, 2018 #34
    SixPak

    SixPak Member Established Member

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    Aren't those stock rev limits? I run my CJ up to at least 7.8k rpm, and if I'm in a crunch I'll go to 8k. My rev limiter is set at 8200. I see the CJ making max power all the way from about 5500 on up, and staying there. That is the beauty of the CJ. I cannot speak about the Holly, but if you are limiting your revs to 7400, you shouldn't have spent your money on a CJ setup.
     
  15. Nov 26, 2018 #35
    HISSMAN

    HISSMAN The Great Bearded One Staff Member Super Moderator

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    Exactly. I spin my boss to 7800 rpms, and I am still making power. And Boss < CJ
     
  16. Nov 26, 2018 #36
    Supreme_5oh

    Supreme_5oh New Member Established Member Beer Money Bros.

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    my Rev is set up to 7.5k, the reason i dont go higher than that is because i dont have OPG so dont want to risk anything, the stock rev limiter is 7k on a stock manifold.
     
  17. Nov 26, 2018 #37
    Supreme_5oh

    Supreme_5oh New Member Established Member Beer Money Bros.

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    I went back and re tuned the car back to 91oct due to going on a trip and posted the Dyno numbers, now that im looking at it you guys are right, it did keep making power all the way to the limiter we had set, im sure it would keep making more if i set the limiter higher.. the 450whp run was on e85 and the 444whp was on 91... e85 didnt make much difference it seems, also only lost about 3TQ lol shared the photo below
     

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  18. Nov 26, 2018 #38
    Curt@injected

    [email protected] Authorized Vendor Authorized Vendor

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    It doesn't fall off like a brick at 7400, that's just where peak is. That's not where the limiter is. And no stock rev limit is not 72-7400
     
  19. Nov 26, 2018 #39
    Curt@injected

    [email protected] Authorized Vendor Authorized Vendor

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    Ya you can definitely rev it higher than that.
     
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  20. Nov 26, 2018 #40
    HISSMAN

    HISSMAN The Great Bearded One Staff Member Super Moderator

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    As long as you aren't shocking the system with a 2-step, bouncing off the rev limiter like a rice boy in a honda or belt driven blower, then your OPG's will and should be fine. You have the same gear set as the GT350, and it vibrates like the gear your mom's bottom drawer and lives just fine.
     
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