• 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:
    15
    Joined:
    Aug 14, 2018
    Location:
    Albuquerque, New Mexico
    So I finally made the swap to the Cobra jet set up and wanting some feedback and see what you guys think..
    my last set up was
    Holley sniper intake manifold, PMAS cold air, TS long tube headers, and e85.. Car made 450whp and 367tq
    New set up
    Cobra jet manifold, Ford Performance cold air, TS long tube headers, and e85 car made 448whp and 391tq
    I thought i would get a huge jump in peake hp with the CJ over the way less Favorited Holley.. what do you guys think the issue here is? or is there any issue at all and the cobra jet got outperformed in this situation?
     
  2. Zemedici

    Zemedici You just got schooled by a 20 something Established Member

    Messages:
    17,527
    Joined:
    Jan 7, 2013
    Location:
    Atlanta, GA
    Supreme_5oh likes this.
  3. Weather Man

    Weather Man Persistance Is A Bitch Premium Member Established Member

    Messages:
    8,806
    Joined:
    May 18, 2012
    Location:
    MN
    Your expectations were in error.
     
    Supreme_5oh likes this.
  4. DMassey

    DMassey No Habla Jibber Jabber Established Member

    Messages:
    1,799
    Joined:
    Feb 16, 2005
    Location:
    Boone Co, WV
    several questions...

    1. were both dyno pulls on the same dyno?
    2. were both dyno pulls done with the same weather/DA
    3. did you have your tune revised for Cobra Jet intake?
    4. peak numbers aside, what did the power band look like above say 6500, as well as under the curve?
    5. which throttle body are you using with the Cobra Jet?
     
    Supreme_5oh likes this.
  5. Curt@injected

    [email protected] Authorized Vendor Authorized Vendor

    Messages:
    93
    Joined:
    May 5, 2015
    Location:
    Kennesaw, Ga

    The holley intake makes pretty decent power all the way to 72-74. I wouldn't have expected much gain going to the cobrajet from just an intake swap, especially an intake which is already a high rpm intake.
     
    Supreme_5oh likes this.
  6. Supreme_5oh

    Supreme_5oh New Member Established Member Beer Money Bros.

    Messages:
    15
    Joined:
    Aug 14, 2018
    Location:
    Albuquerque, New Mexico
    in what way was my expectations in error? just trying to become more knowledgeable, maybe i didn't research enough..
     
  7. Supreme_5oh

    Supreme_5oh New Member Established Member Beer Money Bros.

    Messages:
    15
    Joined:
    Aug 14, 2018
    Location:
    Albuquerque, New Mexico
    1. Dyno pulls were made on the same dyno.
    2. both dynos were done about the same D/A, 3 weeks apart from each other.
    3. tune was revised by the same tuner that dynotuned the holley.
    4. CJ started to drop down a bit in power about 6900rpms and stabalized while the holley kept making more power, the cj did seem to make about 10 more hp throughout the curve at certain rpms, just like the holley did the same at certain rpms..
    5. im using the VMP twin 67mm throttle body.
     
  8. Weather Man

    Weather Man Persistance Is A Bitch Premium Member Established Member

    Messages:
    8,806
    Joined:
    May 18, 2012
    Location:
    MN
    Both geared to letting the motor breath all the way to redline N/A. You would have to mount and test both on the same day and even then the difference might not show through the dyno margin of error.
     
    Supreme_5oh likes this.
  9. Supreme_5oh

    Supreme_5oh New Member Established Member Beer Money Bros.

    Messages:
    15
    Joined:
    Aug 14, 2018
    Location:
    Albuquerque, New Mexico
    I completely agree with this now... mind i was under the belie the cj would be closer to 470whp from everything i read and reviewd, while the holley is usally at the bottom of the list.. i have learned from testing on my vehicle now, and of course every car is different.
     
  10. Supreme_5oh

    Supreme_5oh New Member Established Member Beer Money Bros.

    Messages:
    15
    Joined:
    Aug 14, 2018
    Location:
    Albuquerque, New Mexico
    Title was just for attention, obviously the message does not portray that..
     
  11. Supreme_5oh

    Supreme_5oh New Member Established Member Beer Money Bros.

    Messages:
    15
    Joined:
    Aug 14, 2018
    Location:
    Albuquerque, New Mexico
    with that being said, i think on this particular test the CJ did not seem to match the expectations with the high price compare to the Holley and what that manifold delivered for the price. just and opinion.
     
  12. SID297

    SID297 OWNER/ADMIN Staff Member Administrator

    Messages:
    45,430
    Joined:
    Mar 27, 2003
    Location:
    Myrtle Beach, SC
    New upgrade I'm working on for those that don't want to make the leap to be a PM, but still want to help support the site (sort of like Patreon):

    https://www.svtperformance.com/forums/account/upgrades

    Homeboy found it a little while back and was the first to sign up for it. Looks like it's working.
     
  13. 03cobra#694

    03cobra#694 Want to play a game? Staff Member Super Moderator

    Messages:
    45,759
    Joined:
    Aug 12, 2008
    Location:
    SW FL.
    That's sweet.
     
  14. 03cobra#694

    03cobra#694 Want to play a game? Staff Member Super Moderator

    Messages:
    45,759
    Joined:
    Aug 12, 2008
    Location:
    SW FL.
    That's weird Josh, got the alert on my phone, but not on the laptop.
     
    Zemedici likes this.
  15. DMassey

    DMassey No Habla Jibber Jabber Established Member

    Messages:
    1,799
    Joined:
    Feb 16, 2005
    Location:
    Boone Co, WV
    wow... seems like we've all maybe undersold the Holley a little bit.
     
  16. Supreme_5oh

    Supreme_5oh New Member Established Member Beer Money Bros.

    Messages:
    15
    Joined:
    Aug 14, 2018
    Location:
    Albuquerque, New Mexico
    I completely agree, the Holley actually perform way better than what i expected. The CJ did definitely let me down a bit..
     
  17. stang910

    stang910 Active Member Established Member

    Messages:
    786
    Joined:
    Mar 25, 2010
    Location:
    NC
    Can you post the dyno sheets?
     
    DMassey and Supreme_5oh like this.
  18. Curt@injected

    [email protected] Authorized Vendor Authorized Vendor

    Messages:
    93
    Joined:
    May 5, 2015
    Location:
    Kennesaw, Ga

    I've only tuned a couple of them but both made good power. It's a good bang for your buck intake choice.
     
    Supreme_5oh likes this.
  19. Curt@injected

    [email protected] Authorized Vendor Authorized Vendor

    Messages:
    93
    Joined:
    May 5, 2015
    Location:
    Kennesaw, Ga

    ****ing brodozer. Knew it was coming.
     
  20. Zemedici

    Zemedici You just got schooled by a 20 something Established Member

    Messages:
    17,527
    Joined:
    Jan 7, 2013
    Location:
    Atlanta, GA
    [email protected] likes this.

Share This Page