BCaywood

So does anybody know the biggest tire size you can fit in the back of a 4th gen firebird w/o major work, like tubbing? For the record, im not setting it up to be a dragster, maybe take it to the strip just to get some nubers, but i have more of an autocross set up in mind. Id like something like 285, 295 or maybe in the 300's in the rear, im not sure about the front, maybe 275, along with 18" or 19" rims? I mean, wider the better right? But i feel like maybe to wide and it might hurt it, mainly in the front? Its planning on having around 600rwhp so i want to be able to put it down effectively. Any help would be greatly appreciated, along with pics of setups you may have

SMOKNSS

iTrader: (3)

I don't have any pics but with a little digging I'm sure you can find the thread. I have seen 335s on the back of an F-body before. There is a thread with a lot of pics and he tells what all he did to get them to fit.

BCaywood

I've seen a few threads, but im still not sure. 335's are rediculous, over a foot each side. I saw on one post someone said they had a friend whos mustang would barely burn because of the rubber it had on it. FTR, im heavly looking at the Michelin Pilot Super Sports

WS.666

iTrader: (28)

I did 335s on a 17x13 wheel and a 1.25" spacer. They stuck out a little too far for my taste, so I just did minitubs in order to bring the tires into the car more. Project is not complete, so I don't have any pics, sorry.

Here is a pic of before:

BCaywood

How much work is a tub anyway? Dont they make kits for them or something? Well, actually i should probably ask this first, what exactly is a tub? i know the basics that it alters the inner wheel well, but what are the specifics? like, does it mess with the interior of the trunk or what? do i have to have a custom suspension set up? im just trying to figure things out right now so i dont order the wrong thing or a tire that doesnt fit the car. i also know the rim has a lot to do with what fits, but im not sure which ones to get, really, no clue. all i do know is that i DO NOT like the deep dish style, i like zero offset, or more positive offset. any suggestions would be nice to, im going to have them painted black and orange to match the car ftr

BCaywood

Actually, I Love Qcon's Trans am, that stance and combo on that car is stunning. im just not sure how those rims would look painted black and orange. Im going to go with black with an orange lip and center cap

JD_AMG

You may want to search around before you dive into this.
What exactly are you planning to do with the car? Just street drive with the occasional auto-x? Do you want to be competitive at all?
If you want balanced handling with these cars you generally want to run square tires, so same size tires all around. You can fit 315s (315/35/17s) on all four corners with very little modification and this is what the majority of the autox guys run.
As far as your 600RWHP goal, you are not going to put that down effectively with street tires, period. You are also going to struggle to use that much hp/tq on an auto-x course or even road course.

BCaywood

Yea, thats why im askin lol like i said, im not to sure what works, so i thought id ask the people who do. Im planing for mainly street driving with occasional Auto-x, whenever the seasons open up. So having 315 up front doesnt hurt the ability to turn the wheel? it makes sense that it would, but then again, just about anything would if you think about it to much :p id like to be competitive, so would it hurt the auto-x and road corse performance to have that much, or is it just that it wouldnt really be necessary? If it doesnt hurt it then id like to be in that ballpark for power, seeing as a lot of guys i hang with have powerful cars, and i still want to be able to shut them up, and take a corner like a boss. Especially since im not the only person i know that has an f-body, and everyone else sets them up for drag, which isnt my thing

LILWS6

I run 335's on 10.5" wheels they took a little more beating than the 315's but they clear the stock LCA's and my new tubular ones

LILWS6

all the more close up pics i have of the tires

BCaywood

So would 335's fit up front to, or would that be to much? And your car looks really nice, very clean. But personal preference, the tires stick out to much. Would i have to have move the lca's to move them in flush with the side of the car? Thanks for the pics, gives me a good idea of what they look like on the car. Ive always felt the f-bodies could fit some massive tread in the stock wells

RAMPANT

iTrader: (17)

315s fit up front ok.

I only did one little mod on mine for them. I added 2 screws to hold the plastic inner fenders out a little better, the 315 will polish a few spots on them. I have seen cars rip the inner fender out if the tire gets a hold of it.

I would not run 335s on a 10.5 either. Same as putting a 315 on 9" rim. Not a good idea. Plus it will not handle correctly as the side wall is buldged out. I should have 11s for my 315s to be correct.





More of it at an autocross here.

https://skydrive.live.com/?cid=6fae0...1CEF8D21%21540



Good luck!

JakeFusion

iTrader: (7)

I'm going to try Replica Z06 Spyders... 19x12 59mm offset on the rear with a Nitto NT05 335/30-19...

It will take BFH, adj PH Bar, maybe adj LCAs, and rolled fenders. I don't think they will stick out like some of the pics in this thread and won't need to be tubbed. I might even try the 345/30-19 NT05R drag radials...

RAMPANT

iTrader: (17)

You do realise that is almost 27" tall tire, on these cars, once you are over 26", you lose room really fast. I run a 315, 27.2" tall drag radial and it was way tougher to fit than the 315, 25.6" tall tire. The actual section around the frame rail becomes the rubbing point, and almost no BFM will move that. You can see in my picture where it rubbed with the 27" tire, I hand no issues there with the 25.6". I also had a Watts that keep the axle centered better than a PHB, so good luck. Not saying it is impossible, but it sure will not be a cake walk either.

JakeFusion

iTrader: (7)

I've seen 3-4 cars do it now. It's a pain in the *** for sure, but they aren't tubbed either.

LILWS6

My 335's look like they fit like your 315's do. I really didn't have much of a problem with rubbing over my 315 sumitomo's which makes me think this run small? what 315's are you running on your car rampant?

RAMPANT

iTrader: (17)

I have run quite a few different 315/35 17s on it. MT ET Steet II DRs, Nitto 555Rs, Toyo R888s and now have a set NT-O5Rs, they are way wider than the 555Rs, and maybe a tad wider than the MTs. Toyos fit pretty wide too, and what are shown in he above pictures.


My drag set up is a MT 315/45 16. These are tight due to the height of the tire.

LILWS6

The nt 05r's decent on the street? I don't drive the car much as is which might change this year as I now own a house with a garage.

BCaywood

so I hate to dig up an old thread of mine, but I still have a few questions. so, the 335's clear the stock lca's? and the square setup is best for auto-xing, and if so would it be good to stick to 315's? and with the 335's what would the offset have to be to keep the tire tucked in and not sticking out the side? im just getting ready to get new tires and rims for the bird and want to know. so ik that keeping with the stock radius is the best thing to do, so what tirewall would I need with 19" rims? or could you bump up the diameter a little without messing things up.

BCaywood

Hello? Little help please?