FI and wheel size. - Page 3 - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

King Tut · 05-23-2013, 01:03 PM

Quote:

Originally Posted by DAMotorsports

we just singed with Weds Sport and will be running there new SA15 18/9.5. We will be testing them with a 275 and hopefully a 285 set up. We will be running a squired setup so the final tire will be the one that fits the front. the SA15 are about 19 lbs.

I think you will be the first to fit a 275/285 up front.

DAMotorsports · 05-23-2013, 01:07 PM

Quote:

Originally Posted by King Tut

I think you will be the first to fit a 275/285 up front.

We are going to try and Ill keep everyone posted. With luck the tires will be here saturday.

Tansey86 · 05-23-2013, 01:10 PM

Quality of tire > Width.

There are guys running 8's in the 1/4 on a 275, you just need the right 275. Suspension also plays an enormous role in how the car hooks up. Getting the weight to the rear and having the car " squat " is imperative.

I also understand many people want to DD their FI setups and have to factor in wet weather performance as well, which eliminates any real sticky tire.

Tuning solutions such as boost by gear also help tremendously with traction, which would eliminate the need for such a wide sticky tire and maintain decent wet driving attributes.

Many things to consider. Hope I was of some insight.

SmsAlSuwaidi · 05-23-2013, 01:29 PM

Quote:

Originally Posted by dabocx

Im going to run the full blown kit on the stock 215s like a madman

Tires/wheels should have come first but ill manage somehow.

I'm on the same boat

killerkid08 · 05-23-2013, 01:48 PM

225 on stock wheels, 11 psi.

Not scary, its fun.

lexusb3 · 05-23-2013, 02:48 PM

255/40/18 on a 9.5 inch on the rear and its fun and sticks when u make it but if u drop the clutch and launch you will spin

!!!! Also I have suspension upgrades... I was on the stock rims and tires just for fun and that was a bit scary not going to lie

OrbitalEllipses · 05-23-2013, 03:04 PM

Quote:

Originally Posted by Adeets

Yeah that thread had nothing of use

ORly? You mean it didn't have anything about fitting wider wheels? Think outside of your box, bro.

nataku · 05-23-2013, 04:45 PM

Quote:

Originally Posted by Pure Automotive

Definitely agree with Tut, would not go smaller than 245 on FI, you need that extra contact patch. Both my car and typerrspec789s car are on 255.

Uh oh... Should I be concerned about my 235's even though they're ZIIs then? Not sure I wanna swallow the cost of more performance wheels / tires lol.

GTB/ZR-1 · 05-23-2013, 04:57 PM

Quote:

Originally Posted by King Tut

I think you will be the first to fit a 275/285 up front.

Yeah, pls keep us posted--will be watching your experiences.

Adeets · 05-23-2013, 05:09 PM

Quote:

Originally Posted by OrbitalEllipses

ORly? You mean it didn't have anything about fitting wider wheels? Think outside of your box, bro.

There's direct correlations and then theres 5th generation correlations, this was the later. Even apples and oranges are comparable.

wheelhaus · 05-23-2013, 05:26 PM

Quote:

Originally Posted by Adeets

...Foot print increases with diameter of rim as well but I want to stay 17"

Incorrect. Diameter of the rim (i.e. 17" vs 18") does not affect the tire's contact patch (or "footprint"), unless you install a tire with a larger outer diameter. If you upsize the rim, you should use a tire of the same outer diameter to maintain speedo readings. This of course means the tire will have at minimum a different aspect.

Consider a 4 wheeler as an extreme example, a factory truck may come with 20" wheels and street tires, and have a contact patch the size of a couple baseball cards. The same truck built for 4WD trails might have smaller 16" wheels mounted with gigantic 40" tires that have a monstrous contact patch.

tg_1981 · 05-23-2013, 06:38 PM

i've been running dunlop direzza z2 245/40/17, on gram lights 17x9 57dr's. No problem hooking up here on map 3.

SmsAlSuwaidi · 05-23-2013, 06:41 PM

Quote:

Originally Posted by tg_1981

i've been running dunlop direzza z2 245/40/17, on gram lights 17x9 57dr's. No problem hooking up here on map 3.

care to expand on your setup ?

tg_1981 · 05-24-2013, 12:23 AM

Quote:

Originally Posted by SmsAlSuwaidi

care to expand on your setup ?

setup is listed below:
http://www.ft86club.com/forums/showt...it+Motorsports

05-23-2013, 01:10 PM	#31
Tansey86 Senior Member Join Date: Sep 2012 Drives: 2003 Subaru Outback Location: Long Island, NY Posts: 1,318 Thanks: 154 Thanked 529 Times in 300 Posts Mentioned: 3 Post(s)	Quality of tire > Width. There are guys running 8's in the 1/4 on a 275, you just need the right 275. Suspension also plays an enormous role in how the car hooks up. Getting the weight to the rear and having the car " squat " is imperative. I also understand many people want to DD their FI setups and have to factor in wet weather performance as well, which eliminates any real sticky tire. Tuning solutions such as boost by gear also help tremendously with traction, which would eliminate the need for such a wide sticky tire and maintain decent wet driving attributes. Many things to consider. Hope I was of some insight. __________________ " I know a lot about cars, man. I can look at any car's headlights and tell you exactly which way it's coming. "

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05-23-2013, 01:48 PM	#33
killerkid08 Cool Stuff Join Date: Feb 2013 Drives: Cool Car Location: Kennesaw, GA Posts: 486 Thanks: 57 Thanked 100 Times in 78 Posts Mentioned: 11 Post(s)	225 on stock wheels, 11 psi. Not scary, its fun.

05-23-2013, 02:48 PM	#34
lexusb3 Banned Join Date: Feb 2013 Drives: FRS Location: florida Posts: 1,478 Thanks: 736 Thanked 570 Times in 434 Posts Mentioned: 110 Post(s)	255/40/18 on a 9.5 inch on the rear and its fun and sticks when u make it but if u drop the clutch and launch you will spin !!!! Also I have suspension upgrades... I was on the stock rims and tires just for fun and that was a bit scary not going to lie

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