315 tire questions.

[NewFoundPower]

Ok guys, I am thinking about running a 10.5 inch rear wheel. I was just curious as to how expensive the 315s are and if there is any issue with running a wider tire. Does it rub a/g anything? Do the tires come in contact with the fenderwell if you hit a dip in the road? Thanks alot.

-D-

[InfamousSVT]

I just got some 10.5 put on mine a week ago and I'm running the 315 tire by Goodyear (Eagle F1 GS-D3) 315/35 R17. I ordered the rims from LateModel Restoration (SCMC vendor:thumbsup: ) http://secure.50resto.com/product1.cfm?SID=1&Product_ID=1800&Category_ID=775
These are the stock Cobra style wheels, great price for the wheels. The tires you can get from www.tirerack.com (http://www.tirerack.com) for around $277 each, but the tires are your choice and I'm not sure if you're wanting to go with a totally different wheel or what!?

To the question about the rubbing! I've heard different story's, but me personally haven't had any problems. I put the H&R springs on, and I used a .25" spacer which I'm taking out Monday! I replaced all the Rear Sub-frame bushings with steeda bushings, along with the differential bushings (Steeda also SCMC vendor:thumbsup:) The rear sub-frame bushings came with a low profile bolt that allows for wider tires cause some people have had problems with the IRS bolt and grind it down (you can see the bolt in the photos below). My tires don't rub on anything except for the very edge of the inner fender well, which will be taken care of when I remove the .25" spacer that isn't needed. Other than that, I'm happy as hell with the ride and the wide as hell tires! I've gotten great compliments on them and I'm happy with the whole set-up! You shouldn't have any problems. The only reason I used the spaces is cause I thought that the bolt might hit, but it won't and the spacers are causing the tires to rub, so out with the spacers and it's a go with no worries! Hope this helps David, good luck to you!:)

[NewFoundPower]

Thanks Jason. I hadn't considered running a bigger tire until I was leaving a stop light the other night and spun my wheels all the way through 2nd. I'm hoping that the wider tires will help me hook a little better. Now time to decide what I want to do; Kenny Brown suspension, JLT CAI, wider tires and rims, MAC H-pipe, ported Eaton, pullies. Decisions, decisions.:rotf:

-D-

[RheacerDave]

Are y'all using 315 on 10.5 just in the rear?

I've got 285's on the front and they just peek out.
Any pushing issues with 315 in back?

[JTSVT]

I have the stock 9'' rim....Im running Nitto 315's w/ no problems...Ive heard that Nittos are the only ones that will fit on the 9''ers...I could be wrong, if so please chime in---JT

[InfamousSVT]

Yeah just running the 10.5 with the 315's in the rear! Still have the stock rims up front!:)

[RheacerDave]

Any push with "smaller" tires up front?

[InfamousSVT]

Any push with "smaller" tires up front?
Nope! None that I'm aware of! Rides great, great handling and superior grip and performance!:thumbsup:

[InfamousSVT]

Thanks Jason. I hadn't considered running a bigger tire until I was leaving a stop light the other night and spun my wheels all the way through 2nd. I'm hoping that the wider tires will help me hook a little better. Now time to decide what I want to do; Kenny Brown suspension, JLT CAI, wider tires and rims, MAC H-pipe, ported Eaton, pullies. Decisions, decisions.:rotf:

-D-
I know exactly what you mean! I've now decided what I'm going to do for the rest of my performance and whatever out come I have that's were I'm staying! Probably? I figure with everything I'm going to do I'll be somewhere around 600rwhp! But that'll be enough for me for now.

About the tires, the stock tires suck on traction, that's one of the reasons I ran into the curb when that idiot pulled out infront of me! If I had gotten traction I would have taken off straight, but the tires let loose and I hit the curb (dry road too)! Oh well, I got some wider rims and good hook-up tires!:thumbsup:

[NewFoundPower]

I swear it is an addiction. I told myself that I wasn't gonna mod my car very much until the warranty ran out. Once I did the first one (MGW shifter) it has been downhill from there. But I bought the car to have fun with so that is exactly what I am gonna do.


-D-

[jmiller]

The 10.5 wheel works great on the rear with the 315x35x17 BFG Drag Radials, complete with the 12" tread width -- hooks well, except on wet surfaces -- and no tire will hold the torque of an 03 Cobra on wet surfaces.
Clearance is fine, except when the car is on a lift, or airborne. The tire will hit the IRS bolt/frame without a spacer (I use a 7/32" spacer). No fender problems.
Hope this helps.

jmiller
Jacksonville, NC

[Butcher]

I know exactly what you mean! I've now decided what I'm going to do for the rest of my performance and whatever out come I have that's were I'm staying! Probably? I figure with everything I'm going to do I'll be somewhere around 600rwhp! But that'll be enough for me for now.

About the tires, the stock tires suck on traction, that's one of the reasons I ran into the curb when that idiot pulled out infront of me! If I had gotten traction I would have taken off straight, but the tires let loose and I hit the curb (dry road too)! Oh well, I got some wider rims and good hook-up tires!:thumbsup:
Attitude is everything. I bought several sets of tires for my IRS. Coudnt make any set work, rippd my new IRS out, put in a MOSER Enginering 8.8",bushings properly, excellent for SCCA or open track with the IRS, totally violent shifts on the 1/4 mile. Depends on what track your on. Half Shafts are high dollars, your going to change them, regularly. Face it on the 1/4 mile.

Jimmie



Jimmie

[Butcher]

The 10.5 wheel works great on the rear with the 315x35x17 BFG Drag Radials, complete with the 12" tread width -- hooks well, except on wet surfaces -- and no tire will hold the torque of an 03 Cobra on wet surfaces.
Clearance is fine, except when the car is on a lift, or airborne. The tire will hit the IRS bolt/frame without a spacer (I use a 7/32" spacer). No fender problems.
Hope this helps.

jmiller
Jacksonville, NC26X 10.5 X 15's here, I carry the front 4.5 Hoosiers a good 45' out of the hole.
Thats with tubular K member and tubular lower control arms. Helps i run BogartRacingWheels...front tire, rim combination is only 26 pounds. 90/10 Konis on the front end, QA-1 adjustables on the ass end! :)

Oh yeah, no spray whatsoever. honest.
Not a freaking valvecover lifted. Stock motor from the heads down.

Sometimes, you have to say w00p!




Jimmie

-> Dialing it in!

[Butcher]

The 10.5 wheel works great on the rear with the 315x35x17 BFG Drag Radials, complete with the 12" tread width -- hooks well, except on wet surfaces -- and no tire will hold the torque of an 03 Cobra on wet surfaces.
Clearance is fine, except when the car is on a lift, or airborne. The tire will hit the IRS bolt/frame without a spacer (I use a 7/32" spacer). No fender problems.
Hope this helps.

jmiller
Jacksonville, NC
2003 - 2004 Cobras with the IND rear suspension Jason has got the shiznit on.
I worked it for awhile, he has it fit, This really is suspension relative. Read the earlier post, do a search, Look at ArchAngels Cobra, sharp car.
However, wont work for everone, depends on what you doing with the Cobra and most importantly, the year model. Pay attention :)

Jimmie

[InfamousSVT]

2003 - 2004 Cobras with the IND rear suspension Jason has got the shiznit on.

Thanks Jimmie, I was worried at first reading all the post about getting the 315's on the 10.5 rims fitting, but they work and the car still rides great! I was running it a couple weeks ago and went up to around 120 - 130mph and no issues with the .25" spacers so I'm going to leave it the way it is!!:thumbsup:

[Butcher]

Thanks Jimmie, I was worried at first reading all the post about getting the 315's on the 10.5 rims fitting, but they work and the car still rides great! I was running it a couple weeks ago and went up to around 120 - 130mph and no issues with the .25" spacers so I'm going to leave it the way it is!!:thumbsup:
Great! Glad it worked for you like you wanted. :) Wish you'd have done this a couple months back when I was beating my head against a wall with it so I could have learned about it then. :thumbsup:

Jimmie

[ORANGE CRUSH]

I have the stock 9'' rim....Im running Nitto 315's w/ no problems...Ive heard that Nittos are the only ones that will fit on the 9''ers...I could be wrong, if so please chime in---JT
Yep, you'er right.

[SlowSVT]

I have the Goodyear 315 D3's on ASF 17 x 10.5 rims. They rubbed on the upper control arm bracket on the drivers side and was real close to the IRS bolt. I had to use spaces. Once it did that I needed to install longer wheel studs. This is what I just posted on the SVT board

Instructions for installing longer wheel studs


When removing the caliper to get the disc off the parking brake cable gets in the way of one of the bolts and is a real PITA. Remove the bolts that the caliper slides on and rotate the caliper away best you can, the C clip that holds the cable, the screw that hold the cable clamp on the lower control arm. You will have to still rounded screw driver pry the cable out of the way so you can get a socket oner the caliper mounting bolt (don't use a scarp squared screw driver. It will beat-up on the plastic parking brake liner).

I was able to pop the old stud out with a pair of C-clamps and a bar of steel between them as someone on the board suggested. It worked real well and I was able to do it without removing the shaft or pounding on the axle. If the stud was stubbern I would give it one wack with a hand sledge and it popped right out. To install the new stud find a wheel lug with the most number of threads you can find and ground the end off to make it open (grind it flat and perpendicular to the tapped hole so it won't gall the hub or punch through the washer). Now I have an extra long installation nut with lots of threads so it will engage many more threads then a regular nut. Don't use a grade 8 nut that might strip the stud. Use a hard 1/2" waster under the lug and draw the stud through the hub. Do it slowly and don't crank it down all at once. Use ani-seize on everything.


What I ended up doing us installing Moroso 3" wheel studs. The problem I had with just about every extended wheel stud I saw was that they where threaded all the way up to the spline. The stock stud had a 9/16" dia. shoulder on it that the disc sat on. Whithout this the disc would be loose and rock back and forth on the studs (not good) under breaking and acceleration. Solution: cut a small piece of 9/16 OD x 1/2" ID x 3/16 lg steel tubing and tap it all the way down until it seats on the axle hub (use lots of ani-seize). Presto! nice tight fitting disc. With 3/8" hubcentric (http://www.lightningforceperformanc...?productID=1168) wheel spacers I was able to use the extra long closed end wheel lugs for a truck which took up the excess stud length. Now I have about 24 turns on the lug before it clamps the wheel.


It's a bit of a hassle, One side took me 2-3 hours but once I got the routine down the other side was done in half that time. I'm real happy with the results

[tazzracing1]

I would like to know if anyone has an idea on the largest tire that will fit a 97' Cobra. I have heard that I may have to remove the quad shock. Thank You for the help.

[InfamousSVT]

What I ended up doing us installing Moroso 3" wheel studs.

SlowSVT,
Was the over all length of your wheel studs 3" or just the thread length? Steeda offers a 2.5" wheel stud that is made by ARP and was wondering what the thread length you had was, cause I want to use the stock lugs!:)

- J