• Welcome to SVTPerformance!

CJ Manifold TRASH???

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

  1. Supreme_5oh

    Supreme_5oh New Member Established Member Beer Money Bros.

    Messages:
    24
    Joined:
    Aug 14, 2018
    Location:
    Albuquerque, New Mexico
    havent posted a photo on here before.. how would i do that?
     
  2. lOOKnGO

    lOOKnGO Keep'um smiling Established Member

    Messages:
    3,681
    Joined:
    Oct 1, 2009
    Location:
    White Post, Va
    Is the trash manifold for sale!


    Sent from my iPhone using Tapatalk
     
    98 svt and Supreme_5oh like this.
  3. stang910

    stang910 Active Member Established Member

    Messages:
    806
    Joined:
    Mar 25, 2010
    Location:
    NC
    Click upload a file under the reply box and select your pic
     
  4. DarkMach1

    DarkMach1 Well-Known Member Established Member

    Messages:
    1,930
    Joined:
    Apr 1, 2009
    Location:
    Florida
    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.
     
    Supreme_5oh likes this.
  5. Saleen_1977

    Saleen_1977 Member Established Member

    Messages:
    274
    Joined:
    Aug 20, 2015
    Location:
    Houston
    Is the Cobra Jet for sale?
     
  6. 96gt02

    96gt02 Well-Known Member Established Member

    Messages:
    1,314
    Joined:
    Jan 21, 2015
    Location:
    NJ
    even if they make the same peak number I guarantee that CJ goes flat till 8K and the holley drops like a rock
     
    98 svt and Supreme_5oh like this.
  7. Supreme_5oh

    Supreme_5oh New Member Established Member Beer Money Bros.

    Messages:
    24
    Joined:
    Aug 14, 2018
    Location:
    Albuquerque, New Mexico
    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. Supreme_5oh

    Supreme_5oh New Member Established Member Beer Money Bros.

    Messages:
    24
    Joined:
    Aug 14, 2018
    Location:
    Albuquerque, New Mexico
    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
     
    96gt02 likes this.
  9. joshdj13

    joshdj13 Active Member Established Member

    Messages:
    240
    Joined:
    Apr 22, 2012
    Location:
    ga
    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
     
    SheepDog and Supreme_5oh like this.
  10. HISSMAN

    HISSMAN The Great Bearded One Staff Member Super Moderator

    Messages:
    24,806
    Joined:
    May 21, 2003
    Location:
    WV
    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.
     
    Supreme_5oh likes this.
  11. B7BlownSnake

    B7BlownSnake Active Member Established Member

    Messages:
    661
    Joined:
    Oct 23, 2010
    Location:
    Rancho Santa Margarita, CA
    The CJ on my Boss didn't feel like it fell off. It was pulling hard until 8000.
     
    Supreme_5oh likes this.
  12. Big JROD

    Big JROD New Member Established Member

    Messages:
    12
    Joined:
    Sep 9, 2018
    Location:
    Frisco, TX
    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. boduke0220

    boduke0220 Well-Known Member Established Member

    Messages:
    1,518
    Joined:
    Feb 24, 2009
    Location:
    Yadkin nc
    you need a monoblade
     
  14. SixPak

    SixPak Member Established Member

    Messages:
    228
    Joined:
    Sep 26, 2012
    Location:
    Dallas, Texas
    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. HISSMAN

    HISSMAN The Great Bearded One Staff Member Super Moderator

    Messages:
    24,806
    Joined:
    May 21, 2003
    Location:
    WV

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

    Supreme_5oh New Member Established Member Beer Money Bros.

    Messages:
    24
    Joined:
    Aug 14, 2018
    Location:
    Albuquerque, New Mexico
    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. Supreme_5oh

    Supreme_5oh New Member Established Member Beer Money Bros.

    Messages:
    24
    Joined:
    Aug 14, 2018
    Location:
    Albuquerque, New Mexico
    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
     

    Attached Files:

  18. Curt@injected

    [email protected] Authorized Vendor Authorized Vendor

    Messages:
    351
    Joined:
    May 5, 2015
    Location:
    Kennesaw, Ga
    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. Curt@injected

    [email protected] Authorized Vendor Authorized Vendor

    Messages:
    351
    Joined:
    May 5, 2015
    Location:
    Kennesaw, Ga
    Ya you can definitely rev it higher than that.
     
    Supreme_5oh likes this.
  20. HISSMAN

    HISSMAN The Great Bearded One Staff Member Super Moderator

    Messages:
    24,806
    Joined:
    May 21, 2003
    Location:
    WV
    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.
     

Share This Page