Results 1 to 12 of 12

Thread: Best tyres for "happy laps" or roll racing at QR

  1. #1
    i want more power goracing's Avatar
    Join Date
    Jul 2007
    Location
    brisvegas
    Posts
    559

    Best tyres for "happy laps" or roll racing at QR

    As the title suggests, I have having trouble with traction at Qr for these social events. On the strip I have so much grip but out there it just tears the tyre. I went from a ET street 16/255/45 to a 15/275/50 and while i think it was better initially, once the tyre starts to tear (will post photo Soon) its just shit from then on.

    I have tried low pressures but makes stuff all difference. My suspension is set to soft and does squat.

    Does being to soft in the suspension makes the tyre work to hard?
    Is the compound to soft and need a real good genuine Street tyre?

    Wanna sort this before me first crack at roll racing.

    Car spec - is manual with a little bit of HP and once into 4th will get grip by the end of that gear

  2. #2
    Registered User nelsonian101's Avatar
    Join Date
    May 2009
    Location
    Sydney
    Posts
    1,068
    Have you tried MT both types in 15"?

    I'd recommend anything from Hoosier instead.
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

Name:	s-l16060.jpg 
Views:	11 
Size:	72.4 KB 
ID:	103467   Click image for larger version. 

Name:	s-l1600.jpg 
Views:	11 
Size:	59.2 KB 
ID:	103468  
    Attached Images Attached Images  
    Last edited by nelsonian101; 29-11-17 at 05:22 PM.
    BMW M140i daily.
    Honda Odyssey.
    FG XR6T ZF - Road registered 410rwkw Circuit car.




    Wakefield 1.07.386 (Street Tyres 1.08.8) Marulan Short 43.4 SMP GP 1.48.1 Winton 1.35.4

  3. #3
    Registered User Dexi's Avatar
    Join Date
    Mar 2012
    Location
    Bris
    Posts
    1,196
    Turn the boost down, hth.

  4. #4
    Registered User Milkman Don's Avatar
    Join Date
    Feb 2013
    Location
    look behind you
    Posts
    2,492
    Tried feeding the pedal and not trying to put your foot through the firewall? Stage boost in gears?
    Quote Originally Posted by Faux Forg View Post
    I agree with Rdyno

  5. #5
    Registered User I'm DJ!'s Avatar
    Join Date
    Jan 2012
    Location
    Beach-ville
    Posts
    8,136
    Will. Nto1s were pretty good on mine with similar power to yours but I'm way more stiff in the rear end. What are you using?
    DJ's don't need sigs

  6. #6
    Registered User
    Join Date
    Mar 2011
    Location
    Campbelltown, Sydney, Australia
    Posts
    576
    Quote Originally Posted by goracing View Post

    I have tried low pressures but makes stuff all difference.
    There is your 1st problem, drag radials (not pro et type) are designed to work at pressures closer to their road going cousins rather than at low cold pressure.

    Mickey Thompson have actually said that either the Pro Bracket radial or the Bias Ply ET Street R would be the best tyre for the "no prep"/roll racing style of events, but unfortunately I believe that they may be banned by Roll Racing.

  7. #7
    Non Compos Mentos Gammaboy's Avatar
    Join Date
    Jun 2008
    Location
    Brisbane
    Posts
    14,538
    The problem with having an IRS car soft in the rear is that the squat will induce a bunch of negative camber and it'll trash the inside edge of the tyres. Koeingsegg have treated this by adding a 3rd spring/damper that on works in squat, allowing them to maintain a roll-stiffness that works for going around corners...
    "Where can we get hold of a Vincent Black Shadow?" "Whats that?" "A fantastic bike," I said. "The new model is something like two thousand cubic inches, developing two hundred brake-horsepower at four thousand revolutions per minute on a magnesium frame with two styrofoam seats and a total curb weight of exactly two hundred pounds."

  8. #8
    Goat roper Motherfucker Jones's Avatar
    Join Date
    Jun 2011
    Location
    Struggletown
    Posts
    6,495
    I don't think it's a tyre problem, sounds more like a suspension problem. I'm no expert but you basically want to force the tyre into the ground with leverage and the weight of the car. If your suspension is soft it's probably letting the tyre flop around and unloading it on gearchanges, letting it spin and tear.

    How much power/what's it weigh?
    Quote Originally Posted by RVK 355 View Post
    Hold it flat cunt

  9. #9
    Registered User I'm DJ!'s Avatar
    Join Date
    Jan 2012
    Location
    Beach-ville
    Posts
    8,136
    It's about 750ish rwhp in a JZa80 from memory
    DJ's don't need sigs

  10. #10
    i want more power goracing's Avatar
    Join Date
    Jul 2007
    Location
    brisvegas
    Posts
    559
    Wicked, I have some responses.

    Update, I went for another go with the suspension set alot stiffer and well it went way better. Can get through 3rd gear pulls now. I reckon with better tyres (these are out of grooves) It may pull 2nd.


    Pressures @around 20psi - suspension at around 3/4 stiff is way better. Might even try harder now.

  11. #11
    i want more power goracing's Avatar
    Join Date
    Jul 2007
    Location
    brisvegas
    Posts
    559
    Quote Originally Posted by Dexi View Post
    Turn the boost down, hth.
    We are about to turn it up now lol

  12. #12
    i want more power goracing's Avatar
    Join Date
    Jul 2007
    Location
    brisvegas
    Posts
    559
    Quote Originally Posted by I'm DJ! View Post
    It's about 750ish rwhp in a JZa80 from memory
    correct

Posting Permissions

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