BluePrint Engines

Visit our community sponsor

Thanks Thanks:  0
Likes Likes:  2
Results 1 to 9 of 9

Thread: Cobra feels like it wants to go airborne

  1. #1
    Member
    Join Date
    Jul 2019
    Location
    North Carolina
    Posts
    68
    Post Thanks / Like

    Cobra feels like it wants to go airborne

    When I'm getting on her after 3rd gear she feels like she is getting light in the rear end and wants to lift up. It only happens when I get just over 100mph. I have an adjustable suspension system installed- could that be what needs adjusting?

  2. #2
    Senior Member Mike N's Avatar
    Join Date
    Feb 2011
    Location
    Mooresville NC
    Posts
    801
    Post Thanks / Like
    Typically it's the front that gets light at speed. The customary fix for that is a chin spoiler. Not sure what your issue could be if you are feeling the rear get light.
    Mike............

    FFR2100 - 331 with KB supercharger - T5 - 5 link rear 3.08's and T2 Torsen.

  3. #3
    Member
    Join Date
    Jul 2019
    Location
    North Carolina
    Posts
    68
    Post Thanks / Like
    I have been trying to get a good 0-60 time. The Cobra jet really comes alive in 3 and 4th gear at 4-6 1/2 rpms so I keep my foot in it a bit to wind her out. If I am going around a sight bend or a dip in the road it feels like I'm going to start to lose it. Very uncomfortable. I don't think it is possible to get a top speed either. It would be an infinite number as feels like it will just keep gaining until you lose it. I'm not interested in going that fast. She is crazy powerful. I've had fast cars before but never had anything that would break the tires loose shifting into 4th over 60 before. I do not want to get too crazy in her but feel like 100 mph is not too much to ask. I'm down here in Waxhaw not far from you Mike.

  4. #4
    Senior Member
    Join Date
    May 2018
    Location
    Merritt Island, FL
    Posts
    254
    Post Thanks / Like
    What are your corner weights and suspension settings? What is your ride height?

  5. #5
    Member
    Join Date
    Jul 2017
    Location
    Eads, TN
    Posts
    48
    Post Thanks / Like
    And tire pressures?

  6. #6

    Steve >> aka: GoDadGo
    GoDadGo's Avatar
    Join Date
    Feb 2015
    Location
    Slidell, Louisiana
    Posts
    6,556
    Post Thanks / Like
    Blog Entries
    1
    Has the basics of the car been properly sorted out?

    1. Alignment Based On Use
    2. Corner Weighted
    3. Ride Height......(4.0" Front Max / 4.25" - 4.50" Rear Max)

    What tires are you running?

    1. Sizes Front & Rear
    2. Treadwear Compound
    3. Tire Age.........(Old Tire Get Hard)
    4. Tire Pressure..(23-25 PSI Max)

    These & Other Issues May Need To Be Addressed!
    Last edited by GoDadGo; 10-02-2020 at 08:19 AM.

  7. Likes BEAR-AvHistory liked this post
  8. #7
    Senior Member
    Join Date
    Mar 2011
    Location
    Heart of Dixie, Alabama
    Posts
    1,849
    Post Thanks / Like
    My Mk IV with 18" wheels with 245.40-18 fronts, 315/30-18 rear, tire pressure change is very noticeable.
    I tried 25# and the car felt bouncy and dancing at high speeds. The ride could be jarring on all but the smoothest roads.
    I lowered to 23# and could fell a great improvement in all aspects.
    22# and everything is great and still maintains great street handling.
    At 25# over 100 mph, the front felt unattached to the road. I interpreted this, due to tire pressure, was having a dribbling effect.
    Hope this relates and helps.
    Last edited by Railroad; 10-02-2020 at 11:31 AM.
    20th Anniversary Mk IV, A50XS Coyote, TKO 600, Trunk Drop Box, Trunk Battery Box, Cubby Hole, Seat Heaters, Radiator hanger and shroud.

  9. #8
    Not a waxer Jeff Kleiner's Avatar
    Join Date
    Feb 2011
    Location
    Bloomington, Indiana
    Posts
    8,003
    Post Thanks / Like
    Give us something to work with. IRS or live axle? Caster, camber and toe (rear also if IRS)? Ride height front and rear? Tire brand, model sizes and pressures? Answer all this and maybe we can help, otherwise it’s just shots in the dark.

    Jeff

  10. #9
    Senior Member rich grsc's Avatar
    Join Date
    Feb 2011
    Location
    O'Fallon, MO
    Posts
    3,069
    Post Thanks / Like
    Slow down.
    Mrk III, 331 stroker, Borla stack injection, T5, 3:55 IRS, Power steering and brakes. Kleiner body & paint

  11. Likes Ian G liked this post

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  

Breeze

Visit our community sponsor