Sunday, February 13, 2011

Tyre Time


There isn't much needed to make my FD look freaking cool.
Lowered and a bit of paint on the wheels. A splitter is unavoidable and gt-wing will see circuit duty.
Just a tweak here and there. But this post is more about tyres.

Tyre Choice Time.

Right now I have 18" wheels. 8.5" and 9.5" rims but the tyres are worn.
So the logical choice is to replace with the same size. 235/40 and 265/35 Right? Wrong.

Purpose: The car is to see some double duty "fun" circuit driving.
Not extreme time setting or super drift, but somewhere in between. Let's call it "Slide Attack" setting.

So that means maybe a little less tyre is more fun.

225/40 front and 255/35 rear for the street will be perfect. (Version I setting)
This will see the car able to be lowered with ease.
The tyres may have a slight stretch to tuck the wheels nicely inside the guards with 8.5"+35 and 9.5"+38 Offset.
Front will also have more lock at the lower hight without chewing the guards during some impromptu drift.
For the circuit, If I use 255/35 all round. (Version II setting)

I only need another two 9.5" rims with some 255/35 mounted.
These could be used on the front for improved turn in for grip running days or on the rear for spare drift duty spares.
I have more than enough power to spin any tyre so durability is a little bit of an issue also. Softer High grip tyres will dissappear quickly.

It's good writing this down because it helps the clarity.

Positives.
Looks / Versatility / Fun / Low Cost / Durability

Negatives. (at this point I don't care about so basically none)
lower grip level / slightly less control / higher lap times
Lap times for me are only a measure of driver performance so a consistent vehicle setting will mean measurable outcomes.

So I think I've answered my own questions.

Tyres
2x 225/40R18 for the front 8.5" rims.
2x 255/35R18 for the rear 9.5" rims.
2x 255/35R18 spare
Wheels
2x 9.5" RP-01 or similar

Configurations Available
Street 225/40R18 F / 255/35R18 R
Circuit Drift 225/40R18 F / 255/35R18 R
Circuit Attack 255/35R18 F & R GT Wing + current ride hight + alignment.

Tyre Choices
225/40R18 Neova AD08, Direzza Star Spec or Bridgestone RE-11 are the choices. Y25000~ea
255/35R18 Federal 595RS-R seems logical.  Y17500~ea

So total is about 130,000


I think that should balance the car. Probably the 225 Neova would match the grip of the 255 Federals anyway.

(Note to self -- last time green Version II had 255 on 10J rims and there was no stretch. *** Research)


Russ

No comments:

Post a Comment