Thinking about making a jump in tire size Options

[Woody]

Im currently running the 205s and 225s Hankook Z214 AX tires. Even in the middle of the Texas summers they never overheated if I kept the pressures under 24 psi hot. Im wondering if running 225/45/15 front and 275/35/15 rear Hoosier A6s would be more of a detriment because the car is so light or should I just stick with the current size. I do have room for them under the fenders. The car is still an angry 2056 but will hopefully get a bump to 2270 or 2316 this winter. Thoughts?

[Trekkor]

I love the feel and handling of my car with the wide tires.
This after running 205's front and rear for many years.

Car has good balance.


(IMG:http://www.914world.com/bbs2/uploads_offsite/i944.photobucket.com-1413-1352256354.1.jpg)


KT

[Woody]

What are you running up front? I'm kind of limited running SSM.

[Trekkor]

13x8. they spec out to 215-225's ( Goodyear radial slicks )


KT

[J P Stein]

Once you go to A6s you'll not be satisfied with anything.....ah...less expensive.
You'll find that they are only *good* for 50 passes....or less, however.

I went to Rspec (Kumho Victor racers) about 10-12 years back. After that, all I wanted was more.......

If you want to punish your wallet to go fast, the A6s are a good way to do it.
The punishment is not being able to match your times with lesser tires.
The difference will be 1.5-2 sec better than your present tires on a 50 sec course.....once you learn how to set up for em'/drive em'.

Going fast at AX is not cheep.

[Woody]

So ya'll think I should run the 275s?

[J P Stein]

So ya'll think I should run the 275s?

Sure, particularly if you plan to add HP. The CSP Miata guys have 150 hp or so and run a square set-up.,,,,,because thay can. The front end of a 914 won't allow wide enuff wheels for em'. 225 up front is gud.

[Randal]

So ya'll think I should run the 275s?

Suggest you run the numbers, i.e., determine the weight balance between the front and the rear, then select different tire sizes for the front and apply the f/r ratio to the back wheels. That way you have every inch of tire with the same weight. (IMG:style_emoticons/default/biggrin.gif)

[campbellcj]

I've gone from 205's square to 225 front & 245 rear, but unfortunately I have not driven the car yet with the new setup. Originally I wanted to go as big as 275 in back but the flares I got will not allow it. I do have enough room up front to run 245 square if that makes more sense than staggered sizes. It'll take some experimentation I think.

[campbellcj]

.

[Woody]

So ya'll think I should run the 275s?

Suggest you run the numbers, i.e., determine the weight balance between the front and the rear, then select different tire sizes for the front and apply the f/r ratio to the back wheels. That way you have every inch of tire with the same weight. (IMG:style_emoticons/default/biggrin.gif)

I would have the same stagger if I run 225s up front. The current setup has the 225s an inch wider than the 205s up front. The 275s are only an inch wider than the 225s. So I shouldnt be changing the balance. The car corner balances if I remember correctly 45% front and 55% rear or pretty close to that. I wish Hoosier made a 245 DOT tire in a 15 inch rim cause that would be a no brainer and I could run it with my current wheels.

[koozy]

275/35/15 Hoosier A6s will fit just fine both in front and in the rear if your car has standard GT flares. Measure the backspace carefully and you can get there.

The only issue I found was lowering the car too much made it rub in the spot pictured below. Awfully expensive rubber to be wasting on yer fender wells instead of the pavement where it makes sense. The arrows shows the spot that will ruin your day. The ridge of metal that protrudes in that spot can be taken down but if the tire hits it, it makes lunch of the rubber super quick. The rest wasn't as bad as it looks.

[Woody]

275/35/15 Hoosier A6s will fit just fine both in front and in the rear if your car has standard GT flares. Measure the backspace carefully and you can get there.

The only issue I found was lowering the car too much made it rub in the spot pictured below. Awfully expensive rubber to be wasting on yer fender wells instead of the pavement where it makes sense. The arrows shows the spot that will ruin your day. The ridge of metal that protrudes in that spot can be taken down but if the tire hits it, it makes lunch of the rubber super quick. The rest wasn't as bad as it looks.

Do you have any pics with the 275s up front? (IMG:style_emoticons/default/idea.gif) I would have to go up to 22mm torsion bars or go up in swaybar size to run a square setup.

[koozy]

Sure

(IMG:http://www.914world.com/bbs2/uploads_offsite/www.smugmug.com-7931-1352484202.1.jpg)

[Trekkor]

I'll be experimenting with 9" tires in front and 10" in the rear next weekend.


KT

[Woody]

I look forward to the results.

[Woody]

Finished up my Hankooks yesterday. Will order the new shoes next month.

[Woody]

Wheels came in today. These are 15x10 Etoile. I'll run the 15x8 BBS wheels up front till I can afford a matching set. I'll take these apart, polish the barrels, and paint the centers black. Should look good.

[Randal]

Looks like 3" outers and 7" inners. The 7" inners should give you 6" of backspace, i.e., the perfect amount.

They should end up being right next to the body, or say within 1/4" to 3/8" of the body That is assuming the tire side is straight up and down. I know with the Avon slicks that is the perfect inner.....

[Woody]

If I have time tonight I'm going to mount one up and see. I have 4 5mm and 4 25mm spacers. The center shows a 25mm backspace. Do I need to replace the bolts if I take em apart?