ford 03 svt cobra wheels

[TalonR]

You know.....I never saw the pictures of the Mustangs rims in the eclipse. It when from him asking if the rims would fit, to him finding out they do, to him going to try them.....And then to a wiseman argument that strayed from the point of his question.....Was there ever any pics of what it looked like??

 

[DSMeclipse4G63]

WOW!!!!! I didnt know this one would come back and bite me in the ass like it did.... Well anyways here goes...one Im not a "young lad", two I wasnt talking about huge rubber, three last time I checked 245s were pretty good size for a dsm. Look guys I wasnt going for cool nor was I going for HUGE wheels and tires, like I said I got an offer for 100 a wheel with 245 45/17 kumho 712 with plenty of tread left. Last time I checked thats a good deal, all I was asking is wwhether it fit or not then when I tried them on and said they fit the thread should have stopped there. I obviously didnt buy them, now I know for sure from many of my own as well as through many other peoples experiences that to try anything new or different will get you either flamed or called a "young lad" that should think before asking. If people would read before replying they would or could understand motives before putting down a possibly good idea.
Andrew
The dsmer that doesnt always go with the flow....

 

[Incan]

"Overall, the area of your contact patch has remained more or less the same."
More or less is what he says. in the real world it is way more contact area, for the reasons that jtoby has explained.

- if you make a tire taller it will have a larger contact area.
- if you make a tire wider it will have a larger contact area.
- if you do both, like drag racers do, then you'll have way more contact area.
- if you mainly make it wider, like F1 cars, then you're have more contact area and better lateral grip.

A Viper with 345mm tires, that are about 24 inches tall, will have a larger contact area then a Prius that has 185mm tires, which are also about 24 inches tall.
- I'm not using science even, just plain common sense. If you drag race two exact Vipers, but one has 345mm wide tires by 24 inches tall, and one has 225mm wide tires by 24 inches tall, then guess what.... the first Viper, the one with wider tires, will win hands down.

 

[wret]

Thanks for bringing back a great thread. It should be required reading for our dsm handling scholars. Lay off the personal judgments though.

 

[ACM]

Indeed. Tyres are an enormously complex system - Paul Haney wrote an utterly fascinating book on the subject, called The Racing & High Performance Tire. The last section is also an excellent reference on car setup/handling.

I'm sure it's been said here many times, but it bears repeating - performance begins and ends with tyres. They are the only component connecting the car to the road, extracting the best from them is the single most important task of the car engineer and the driver, from making that potential available to extracting that potential for as long as possible.

Charles

 

[jtmcinder]

By the way, Wret, both of those "front engine" cars you listed are actually mid-engine designs. They just happen to be mid-engine-front (as in: the engine is behind the front axle but in front of the driver). Two other issues not mentioned with regard to F1 tires are rolling resistance and air resistance, both of which push down on the size of the fronts.

I finally borrowed a copy of Haney a few months ago, Charles. My head has not yet stopped hurting.

- Jtoby

 

[eclipsh]

So, while most of this thread has been fairly interesting reading, questions still remain..

How is the fit of a Mustang 17x8 or 17x9 rim on a 1g AWD? Some say they stick out, others don't. How is the fitment against the hub? Do they cause premature bearing failure? (The rims I'm looking at are 17x8+45mm)

I'm a broke college student but I still want some killer grip for cornering and a little better looks than my beat up swirlies offer. Mustang rims are cheap on ebay and give me bigger/wider tire options. From the reading and common sense wider = better for corner grip and braking, especially when combined with low profile tires.


Oh, something else that was missed in the heated debate above. Tires are constantly changing the amount of pressure put on them via braking, acceleration and cornering. That squishes down the tires recieving the extra pressure, increasing the contact patch. So my question on that is: does tire size impact this effect? Obviously inflation pressure does, so do pressure options vary much by tire size? IE: can you run more or less pressure based on size?

 

[jtmcinder]

The better suited the wheel to the tire (which almost always means running a wider wheel that you had planned), the lower the pressure you can run (all else being equal) and, therefore, the more you will get from the tire.

For example, you can probably drop 2 psi switching from a 245/40/17 on a 17x8 to the same tire on a 17x8.5.

Note, however, that you'll probably need spacers to run 245/40/17 on Mustang wheels.

- Jtoby

 

[eclipsh]

So if I were to pick up those mustang 17x8+45 rims, I'd likely want to run a 225 or 235/45 so I could use less pressure and get more stick?

They are the bullit rims btw. Might look interesting on a 1ga.

 

[wret]

Note, however, that you'll probably need spacers to run 245/40/17 on Mustang wheels.

You're not referring to the kind of spacers that increase offset are you?

 

[eclipsh]

You're not referring to the kind of spacers that increase offset are you?

So are you saying I would NOT need to use spacers? I'd prefer to avoid them anyhow as I hear they cause problems.

 

[wret]

Looks like I'm behind the times. The last time I looked at Mustang wheels they were running offsets of around +25mm. Jtoby is right. You will be okay with 235/45/17 tires. I think you maaaay be okay with 245/40/17's but it will be extremely close and will depend on tire brand. You would definately need spacers for 245/45/17's.

 

[TurboMike]

I've run 235/45-17 on +40 wheels and it was DAAAMN close at the arm on a 95. I think the extra 5mm of a +45 wheel might make them rub. At that point it would come down to how much of a true 235 the tire manufacturer makes (some are slighly wider than others even tho they're all 235). Although I've heard 97+ rear suspension has a few MM of more room when the switched to a different part number rear suspension? Dunno. With 5mm or 10mm spacers you should be fine.

Then again, you may be talking about a 1G.

 

[eclipsh]

Then again, you may be talking about a 1G.

<------- uh, yup.

 

[wret]

...talking about a 1G.

Yeah, I lost track of that too. I'll shut up and wait for someone that actually knows what he is talking about to chime in.

 

[JOEY A]

(The Govenator Voice) I demand Pictures NOW

I want to see some damn pics

 

[SlowSpyder]

http://www.martincheck.com/wheel_tire_fitment_FAQ.html.
Look at his pictures especially the gallery for the 1st gen with the 255 series tire

 

[Stapl3]

Nice link.

 

[eclipsh]

All I see is 2nd gens on the site. Could you throw up a direct link to the 1g?

Here's a little photochop I did of the bullitt stang rims onto a 1g. I think the smooth but bulky lines of the rims and car work well together.

 

[SlowSpyder]

All I see is 2nd gens on the site. Could you throw up a direct link to the 1g?

Here's a little photochop I did of the bullitt stang rims onto a 1g. I think the smooth but bulky lines of the rims and car work well together.

http://mcheck.photosite.com/Eclipse/1g255/

 

[eclipsh]

Yeah, so I ended up going with a set of Evo 17x8's with 245/45/17 rubber. Had to flare the front fenders a lot but they tuck now. The picture below is from before pagosa dsm and I did the flaring.

You must be logged in to view this image or video.

 

[silvah_gsx]

I have not seen any info to back up that skinnier
tires are better in snow and ice.

Look at rally cars when they run snow or dirt. They're on a super skinny tire, because it allows the car to sink through the "fluff" up top and gives the tire better footing. (On ice they have 420 spikes in each tire, separate issue though)

Looking at tire sizes of these supercars,
the obvious trend is larger tires at the drive wheels.
It would seem that superwide tires are not necessary for front end grip.

The front only has to deal with cornering force and braking, whereas the rear deals with all that PLUS 400-600 horsepower, which on account of the friction circle (tire has finite grip, can devote amounts of grip to braking, accleration, or cornering so long as the demands add up to within 100% of the tire's capacity) requires a larger rear tire with a higher 100% to deal with the acceleration demands. Just figured I'd point out why since someone brought it up.

As it turns out, I agree that the sidewalls
play only a small role in keeping the car off the
ground, but so what?

May be stating the obvious here, but a stiffer sidewall won't roll over as much, keeping you on the contact patch and the tire temps w/in a good range.

Just little nit-picks, but they should have been brought up earlier. Evo rims on a 1g are kickass. So are Bullit Mustang rims

 

[JOEY A]

Anyone else have pics>?

 

[drewvr4]

oh man i like the evo rims

 

[eclipsh]

Yeah, here is one from my gallery with the new rubber on the car.

<img src="http://www.dsmtuners.com/gallery/files/5/2/4/4/3/rearview.jpg" alt="rear view" />

I went with 245/40/17 Kumho SPTs. They are much stickier than the worn out AGX rubber was. The 45 sidewalls also rubbed on the front struts when I cornered hard. The 40 sidewalls do not.

Oh, and the wheel gap isn't that bad in back normally. It is just the steep driveway and pointing downhill that makes it look that way.