Jump to content
SAU Community

Toyo 888 20 Inch

handbrake

By handbrake,
in R35 GTR

 Share

Recommended Posts

  • Replies 43
  • Created
  • Last Reply

Top Posters In This Topic

Popular Days

Top Posters In This Topic

Popular Days

Posted Images

fungoolie Community Regular

fungoolie

Posted
Posted (edited)

Has anyone looked into the Falken FK452s for the GT-R? They are 255/35 and 285/30 resulting in overall diameter of 680 and 687 mm. Apparently they won a recent wheels tyre test. They are lower profile than standard though. If theyre cheap and as good as they say they are then they may be a good option.

You could also match up their 305/25 with their 255/30 fronts for an identical diameter of 661mm however I'm not sure this would really help the balance of the car.

Edited by fungoolie
fungoolie Community Regular

fungoolie

Posted
Posted

A couple other questions:

Does the lower sidewall height on the lower profile non run flat compensate for the stiffer sidewall on the taller runflat? I'm just curious as to how this will affect the ride/handling. If you were too look at this 30r/35f profile combo instead of the 35r/40f you suddenly jump up from having a choice of about 4 road tyres, Bridgestone, Dunlop, Pirelli, Michelin to about 40 on the tire rack website.

Does anyone know what rolling diameter difference front/rear the GT-R can handle?

Going down this route for a daily driver gives me the ability to buy a 300 to 500 treadwear tyre for prices ranging from US$119 to US$250 compared with US$400 for the Dunlop and Potenza standard runflats.

Also any thoughts on what your insurance company may say if you change to non run flats?

sewid Grand Master

sewid

Posted
Posted
Thats why the base model GTR IE less run flats, leather trim and bose is lighter, but the manual says its only 10kg lighter.

Base model has run flats and leather. Only the bose is missing and they replace it with crummy gear which probably weighs very similar amounts.

fungoolie Community Regular

fungoolie

Posted
Posted
My JDM base model 2008 doesnt have run flats or the full leather trim.

What did they replace the standard Bridgestone or Dunlops with when they brought it in? There is no GT-R model without full leather. Where is there non leather in your car?

  • 1 month later...
LSX-438 Mentor

LSX-438

Posted
Posted
any issues running these directional tyres backwards on a perfectly dry track?

QR is trashing my front left tyre.

I guess I am lazy and dont wont to swap the tyres on the wheels unless I have to.

Mark, we've run a few r-spec tyres backwards in the dry with no problems, to get a bit of extra wear from them. Also, changing topic a bit, with the michelin slicks, i dont believe they are directional (some slicks are) and the porsche guys tell me you can even flip them on the rim (despite there being an outside and inside, the outside merely has a rim protector on it).

  • 1 month later...
handbrake Veteran

handbrake

Posted
  • Author
Posted
Our Toyo 888 test tyres have arrived for the Willall GTR.....let the testing begin :(

Hey Martin, any update on the R888 test?

I hope you are looking after Trent. He has something special coming for my car I believe....

  • 2 weeks later...
handbrake Veteran

handbrake

Posted
  • Author
Posted

well after 30-33 5 x hot lap sessions at QR, the Toyos looked to be shagged.

with the COBB stage 2 tune I managed a 57.68 on the sprint today on the toyos. I reckon they are at least as good as the Dunlops

will be going out on the track with 18's next time and either second hand michelin slicks or RE55. have the slicks here so not sure if I will buy the RE55's - they aint cheap!

  • 2 weeks later...
  • 3 weeks later...

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share
Go to topic listing


  • Latest Posts

    • Duncan
      R32 Gtst - Track Car

      By Duncan · Posted

      Hope you aren't too sore after that one, might take a day or 2 to notice yet and I guess it is a loooooong drive home. On the bright side, tube frame front end is a thing at superlap, right?
    • Dose Pipe Sutututu
      R32 Gtst - Track Car

      By Dose Pipe Sutututu · Posted

      https://www.facebook.com/share/p/18rmVb1SKB/ 
    • GTSBoy
      Leak from Tokico BM50 Brake Master Cylinder

      By GTSBoy · Posted

      The chart of front pressure to rear pressure (with one being on the x axis and the other being on the y axis) is not a straight line on a typical proportioning valve. At lower pressures there is a straight line with one slope, and at higher pressures that changes to a lower slope. That creates a bend in the line at that pressure, called the knee point. If you do not change the proportionng as the pressure gets higher, you will suffer excessive pressure (at one end of the car or the other, depending on which way you look at the proportioning action) and then get lockups at that end. The HFM BM57, from my memory of previous discussions, is based on the BM57 from a different car (to a Skyline), with a different requirement for the location of the knee point and the distribution of pressure front to rear, and so is not a good choice for an upgrade on a Skyline. Here's a couple of links to some old posts, one from here, one from elsewhere. A lot of it pertains to adjustable prop valves, but the idea is the same. There are plenty of discussions on here about this issue from al the many years of people wanting a cheap/accessible option. https://grassrootsmotorsports.com/forum/grm/learn-me-brake-proportioning-valves/236880/page1/ https://grassrootsmotorsports.com/forum/grm/learn-me-brake-proportioning-valves/236880/page1/  
    • No Crust Racing
      R32 Gtst - Track Car

      By No Crust Racing · Posted

      Yeah dunno why johhny posted that here with no context, just post on FB/insta bro where he put it up?  Laine had an off at T4 during Thurs prac, he's ok, car is less than perfect, they are done for the weekend, he can fill in the rest. Bando also binned it like 100m up the road.   
    • MBS206
      R32 Gtst - Track Car

      By MBS206 · Posted

      I feel there must have been a FB/insta post and the weekend did not start well at all I hope everyone is all okay
×
×
  • Create New...