Slicks Vs Semi's - Need Some Help With Tyres

[zebra]

Mark what are the widths of the porka front slicks?

I thought they were only quicte narrow (like a 240) or something?

[handbrake]

yeah I have never used a front cup slick but I think they are 240 and maybe smaller diameters than the rears some of the guys us on the R35

here is a link to the pdf with info on tyre setup etc

http://www.michelinman.com/media/en-US/pdf/motorsports/Michelin_Race_Tire_Catalog.pdf

[handbrake]

yeah I think the fronts are 24/64 - 18

[Angus Smart]

the fronts fit 18x10 inch wheels.

[wrxkilla]

Thanks for the info fellas

The pdf has some good reading in it.

Cheers

Mick

[No Crust Racing]

Troy doesn't have any semis in my size, who else is parting with second hand semis? 235 17s I'm after.

Don't really have the spare coin to drop 12-1400 on some new cheap ones.

[Duncan]

I have slicks in that size in my sig...

[Gts-t]

Fitted 24/64 18s on r34 gtr rims to my track r32 gtst today. Clearance on the inside of the front tyres is very very tight.

The tyres seem to have a slight stretch on the 18x9 rim.

What sort of cold tyre pressure woukd be good. Shoould i up the swaybars f+r?

Cheers

Edited May 23, 2011 by Gts30t

[nismoman]

Slicks generally like around between 32 psi to 35 psi hot, so I'd set them at 30 psi cold and adjust from there.

[Beer Baron]

and yes stiffen the bars and dampers too if you can. slicks will take far stiffer set-up than road tyres/semis.

[Gts-t]

Cheers guys, i think its fair to say these tyres gave been thru many heat cycles and im guessing they will offer less grip than a good semi. Its probably worth noting ive never driven on semis and have only done one track day at QR and am using these tyres because they are cheap to practice on and can handle 5 hot lap sessions.

I think the guards are going to need rolling min. On a side note i think the rims these 24/64-18 tyres come off are 9 inch wide, the '11 car has 9.5s on the front but uses the same tyre.

[evil_weevil]

bump.

so i used slicks for the first time - and even after 6 laps still couldnt get any heat in them.

Ryan (boz22n) and I think they are just too big for my lil POS. (220/45/15)

was quite a challenge trying to keep the car straight on turn in, mid and corner exit! was fun..but not good for times!

So Im thinking - prob no point running these slicks anymore? (dunlops - not 100% sure on model)

[Duncan]

soo....what were they? brand? compound? age?

[evil_weevil]

lol

dunlop formula sp sport

[Beer Baron]

age? if they are old they will be very hard to get heat into them with a light car with not much power.

[evil_weevil]

no idea on age - they honestly dont seem that old at all

[2pee]

Modern dunlops are radial construction , they tend to like a lot of camber.....possibly not available on a standard car, MX5 is it? Whole host of other unknowns from the description. One mate bought several new sets for his historic sedan after he reacquired it - after a long absence - from a certain Melbourne outlet (well known), only to find it drove like it was on a skidpan, turns out, stock was from the same era he last drove too, lol.

[evil_weevil]

Yep, MX5 girly car!

Im running -3.5 camber up front and -3 on rear (although it needs an alignment again )

hmm...

might chuck these on ebay as I honestly dont see myself using them again - then put money to cams and ecu haha

[Marlin]

no idea on age - they honestly dont seem that old at all

Date of manufacture will be coded on the sidewall somewhere.

[evil_weevil]

ok cool i'll have a look Ben, cheers!

any idea what code to look for?