Hello,

I really need some help here, I am doing a 502 swap, transmission swap (auto to manual) AND ETC... I bought a new 12 bolt moser rear end with stock dimensions of 91 transam GTA. I will buy an enkei lightweight rim but I have no idea about offsets, backspacings, etc. I am thinking of buying these: http://enkei.com/RacingSeriesSpecs/RPM2.html

Can you just tell me the right dimensions? I came to US just to buy parts to my car and I am running out of time. Thank you for your help...

I have 12.2" wilwood disc brakes at front and rear...,

I will use nitto nt1 slicks on these rims and I want to keep the rear tire width size as big as possible. On tracks I will use enkei's, on street I will use orginal gta rims and diffrent type of tires. I just wanted to let you guys know

 

http://www.camarotech.com/WheelsAndTires.html

that chart should be helpful and also what are u planning on doing with the car cause Nitto NT01 are not drag radials they are for like autox and such they have a stiff sidewall for cornering and are not the best for say street strip drag racing. for that if u wanted to stick with Nittos ud want the NT555R tires...

 

thank you for the great information, I wont use the car as a drag race car, I will use it on circuits. Time trials mostly... I will corner the car shortly

Would you be suggesting any other tires than nitto if we consider that I will be participating in time trials...??

,
"The stock third generation '82-'92 Camaro wheel wells will fit 17"x9.5" rims with a 10mm offset (positive) with P275-40ZR17 in all four corners. "

this means that if I buy a 17"x9" rims with 75 bore diameter, these rims will fit and I will be able to use 265-45-17 or similar values tires can be installed on those rims correct??

What about the bolt patern of standart 91 transam rear end I mean the one that I bought from moser... with 33" axles,

Will the calipers and rims be in good positions (I am talking about ET's)

I will be glad if somebody answers my questions, I am really looking for a solution.

Thank you all; especially gotta355z28

 

Just an FYI, while those first Enkei wheels you posted look good they won't fit a thirdgen. They're set up for a much smaller bolt circle; like a subaru legacy or honda 5 lug setup. A buddy of mine had those on his legacy and they did look very nice. The bolt circle you're going to be looking for is 5x120.6 I thihk. BMW wheels have been known to use a 5x120 and there are a few guys on here using them. You'll probably find nicer looking wheels if you include BMW wheels. (aside from fully custom wheels)

 

BMW and mercedes... off the top of my head fit.

 

There are some enkeis that has the bolt pattern of 5x120... here are the specs:
Offset: 38mm
Backspacing: 5.94" Bolt Pattern: 5-120
Rec. Tire Size: 215/45-17
Weight: 17.9lb

Is there any body that exactly know what is the 91 firebird's bolt pattern?

 

http://www.tirerack.com/wheels/Wheel...All&sort=Brand

I just found these rims, these have different backspacing than enkeis

I am looking to the instruction sheet of rear 12.2" wilwood brake kit and it says it has an offset of 2.50 for the rotors...

Can just somebody help me I need to but the rims in a few days...

Thank you for your future help...
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I just founf a site that might be helpful for bolt patterns

I found my bolt pattern but still I do not know if those rims are going to fit or not... http://www.myboltpattern.com/Pontiac-Bolt-Patterns.htm

transam: TRANS AM84-9216x85x120.712x1.570.3

and some useful information(I do not know if it is true...)

FIREBIRD 82-9214x75x120.712x1.570.3 FIREBIRD93-16x7.55x120.712x1.570.3 FIREBIRD, TRANS AM67-9214, 155x120.77/16-RH70.3