I've been searching for a few days here(and google) and i can't seem to find anything info if Hoosier 275/35/15 fits in a EM1 front wheel wells? I know this is not a problem for ITR as many top D-Stock cars have them, but i've heard that EM1 are smaller than DC/EG front wheel wells.

I was looking to put the 275/35/15 on 15x6 +45 Integra fat five's!

If someone can help me with some insight that would be great!

 

not to be a *** but are u for real i have my 275 /35/15 on a 9.5 inch rim, do u have any clue how big those tires are

 

Yes i do know how big they are, go to the national tour and look at ITR's in DS.

Not sure if you have seen this before, but its very common to have the 275/35/15 on 6" wheel. I have 1 local guy (national champion) with them mounted on 6" mazda millenia (Same as in the pics).




Here is the link from where the pix came from:

http://www.team-integra.net/forum/di...PagePosition=7

 

im sorry that just seams crazy to me . i run sm /smf , not sure what the rules are for ds. man the tire change guy must love the dudes that run that set up .
15x9.5 15-20mm offset

 

Hey no worries, when i heard of it i thought ppl were nuts! If i didn't see it with my own eyes i thought it would be impossible. They say it takes 2-3 guys to mount the tire on 6" wheel.

Do you get any wheel rub at all with your offset?

 

nope its close to perfect i could bring them in a 3-5mm yet. not sure if your 4 lug or not but u can get 949racing.com rims but u gotta run a 1 inch spacer karcepts.com has that set up all set up
i run 5 lug and went with custom http://www.keizerwheels.com/

 

In stock class you have to have stock wheel size only with +/- 5mm offset. So only 15x6 4x100 for me. I'm trying to figure this out to compete with Focus SVT that just introduce into HS. Damn SCCA and there rules!

 

yes it sucks the big ones and there rules . o and by the way my rims are about 10.5 lbs they gotta be about 7 lbs in a 6inch rim

 

One has to wonder if that tremendously compromised sidewall configuration and the amount of bowing happening at the shoulder it that setup is providing anymore grip than a 225 on the same rim. Just cuz the number on the sidewall is bigger does not mean it provides more grip.

Years ago I was helping someone with their stock class 1G CRX (5" rims) and we found that the width of the contact patch was the same with a 205 and a 225 (13" Hoosiers...I think they were A3's back then). The skidpad said the 205 was a tick better and the enhanced feel sealed the deal.

 

^ditto.
The 275 gets very rounded when squeezed onto a narrow wheel. We have a DS/ITR champ here and he's always on 225's.

At an event 2 days ago I was looking closely at the 275 vs 225 on 15x8" wheels and even then the 275 was hardly wider and was a lot more rounded while the 225 was very square with the sidewall being well supported.

Unless I was going for 9-10" wide wheels I wouldn't bother going from the 225/45-15 to 275/35-15.

I've only run 225/45-15 Hoosiers on my EM1, but without measuring or having rubbing problems I didn't notice the front wheel wells being smaller than my old DB8.

 

Yeah this could very well true that a tire is really no wider when squeezed onto such a small rim. There has to be something behind why they do use 275's vs 225's. Maybe having such round corner could help out the lack of camber in the car in stock form? Tolerate heat better?

My local guy (national champ) before has stated that his 225's vs 275's he was only marginly faster on the 275's. But he'll always run the 275's.

Did you happen to see the times of the 275 vs 225? Were the 225's faster? I think if the corners were square, with a camber less car, i don't think i would have as much grip. The body roll in my car is horrendous when in stock form.

Going up in wheels size i not a option at all, with either tire i will have non-squared shoulder on the tires. I can only use a 6" wide wheel.

Well i guess i'll find out soon enough if i can squeeze 275's on the EM1 with rubbing issues, i've got a used pair on the way! I'll report in when i get them mounted!

 

When something sounds like it's courting disaster, it's almost always a bad idea.

 

As far as fitting those - I got 2 black em1 front fenders you can buy off me and cut up to make the tire fit. Just holler handjob.

 

No cutting in stock class, must fit with stock fenders. If your giving then to me for free I'll take them!

 

so 275 needs to cut fenders
& 225 needs to roll fenders?
& 215 ,205 fit stock fender well?

I'm thinking to run 225 50 15 V710 next season, on my EM1

 

Is your car lowered?

 

I don't autocross, but here is my racing experience.

I started with 205's on 6" wheels. I got the car pretty fast.
All the really fast guys were using 225's, so I tried 225's on the same 6" wheel. I gained a little, but not much, ~ 0.2 sec.
I then got new 7" wheels and used the same 225 tires. I gained more, ~0.3 sec (0.5 sec total from 205's on 6")

Basically, the wheel was worth more than the tire, HOWEVER, the tire alone did help. Therefore, I figure the theory is that a 275 sandwiched on a 6" wheel will technically be faster, but only by a small amount (diminishing returns). Given that some people will do everything possible to compete, I am not surprised people do it. In my opinion, I still don't think it's a good idea.

 

As you can see just jumping in tire size has gain you 0.2 sec would be huge in AutoX is your driving in a competitive class and competitive cars. (Maybe with 275's you can gain 0.4sec.) Every advantage you can get to have over you competitor is everything. I don't know why everyone is against having 275's on a 6", this is really common in D-Stock with ITR's.

Yes before i serious into AutoX i would have thought like everyone else, 275's on a 6" rim would be stupid, but i've seen work and win! I rather win than lose.

I'm getting my 275/35/15's mounted next week, i'll know then if they fit into EM1 front fender wells.

 

yes

195/50R15 RE01R w/ 15 X 7 ET43


205/50R15 V710 w/ 15X6.5 ET40 front wheel rub inside abit during U turn

I'll adjust the ride hight again for 225/50R15 for V710 & I'll be using my 7" rims
if I have money
I'll get a set 15x8" 949 racing

 

Here you go!

 

how about rear wheel?
r u gonna use 205 or sth?

 

I didn't try the back since i need the car to rotate, i'll be looking for 205's or 225's. I haven't driven my SiR in awhile and never at AutoX. We'll have to see which is the better setup!

 

its not crazy.. ur just not crazy enough.. have fun be safe!

 

225/50R15 Kumho V710 + 15X7 ET43 + Portland Int Raceway
= rubbing the trailing arm under high g corner

 

The other thing to take into consideration is weight.
Take for example the 225/45x15" Hoosiers on the Tirerack website. These are 19lbs.
The 275/35x15" are 20lbs each. It doesn't sound like much but most of that weight is situated far from the center of the axle, so you have to use more power/torque to spin that wheel/tire combo.
Also Type R has more power/torque than the EM1.

I had 225/45x15" Hoosiers on my 15x7" wheels and they fit fine on my EM1. The wheel wells of the Integra and the EM1 were the same, but if memory serves me right the Type R had stiffer suspension so he could probably get away with those tires.

Personally I don't see any gains except headaches from your tire installer and you want to make sure your local tire place can do this. Some will not touch you with a 10' pole if you brought in your 275 wide tires with 6" wide rims. Or they would be thinking you are speaking alien