tallest wheel tire combo 2.93 gears

Hello everyone I will be installing my posi rearend with 2.93 gears, and I want to purchase a new set of wheels and tires for it, but I would like to know what is the largest wheel combo that I could go with to get the full benefit out of my posi. Every now and then I would like to get on it from a stop a get it to spin the tires, but I also want to run the largest rim possible, with good performance on the street and freeway. Thanks in advance

 

42" x 52", this is a monster truck right? Actually picking a tire size with out knowing the vehicle is impossible.

For reference though, the larger the diameter tire the more torque you'll need to break them loose because it's going to be even more difficult mechanically, especially with 2.93 gears, hope you have a 455. Also for note, the larger diameter tires with 2.93 gears the slower the car will accelerate (unless you've crutched the system with a high stall converter to get the engine at peak torque for it). Should run great on the freeway though.

 

Ok sorry guys I guess I did leave out quite a bit of vital info. The car is a 72' 4 door buick limited. The engine is a stock 455, but I will be eventually doing some performance mods to it. The 2.93 is a posi rearend. I would like to do a staggered combo of 20 up front 22's in the rear, I would like it to have a major lip in the rear. But I don't want to compromise looks for performance.I would like to go no smaller than a 20" all the way around, or I might have to begin the hunt for higher gears. Let me know guys thanks, and if there's more info needed let me know. thanks much

 

Ok I was also thinking of a combo with 20". Could you tell me how that would match up, what is the largest rim size I could use and be able to lay down some serious rubber with the posi that I have?

 

Rim size has no effect on gear ratio.. TIRE HEIGHT is what you need to be concerned with

 

I hate getting into topics like this, when most of us are interested in IMPROVING traction. Will the car "spin the tires" to your liking right now?

If so, in order to keep your speedo reading accurate, go to the tire store and tell them which rims you want and have them select an appropriate low profile tire so that the overall tire height stays the same. They will be able to tell you which rim widths will work for a given aspect ratio based on what will physically fit under your car.

Don't go too wide though, otherwise - GASP! - your traction will improve, you'll be out big bucks, and no tire spin.

Devon

 

ok what's the tallest tire I can go with? If anyone can tell me the rim and tire combo where I can lay down some rubber this is what I'm looking for. thanks everyone thusfar. :TU:

 

I give up.

Devon

 

For your 2.93's to act like they would with a stock tire, I'd be looking at a 275/40/20 all the way around on whatever rim you like. Overall diameter on that one should be 28.6 inches according to tirerack.com

 

But 275mm widths might improve traction too much. Perhaps he should also install an open carrier and sell the posi.

Devon

 

Maybe my word selection isn't correct this evening, or maybe I'm not correctly stating what I would like. From my understanding the only reason to add a posi or find a posi is to get all or most of my power planted, to the ground. I've seen some cars that will screech the tires in all gears, the car I'm working with is a boat to begin with, so it will require alot of torque to get it all planted and moving. I want to be able to get on it from a stop and it lays down some major rubber , this is what I'm inquiring about. If this isn't your style, or if you don't have anything to help out the post, please there's no need to respond. Thank you everyone yet again that's giving me some insight to this, if I knew what it took there would be no reason to post a thread. I look to you guys for good advice, and that all I'm asking for.

 

You've created a situation of mutual exclusivity.

You cannot have your cake and eat it too, as the old saying goes. Putting the "power to the ground" does not equate to spinning the tires.

Your quest for tall rims may very well require wider tires which will improve traction and minimize tire spin.

Does any of this make sense? We want to help, but the same question has been posed to you four times, now.

Devon

 

Ok I do understand what you guys are saying. I like the overall look of the car with larger wheels, but at the same time I would like the car to perform to the best of it's abilities. I want it to be better than what a stock car would be, and if I can get my power planted. I will not by far be taking this car to the track, I would just like to pull up to a light and if someone wants to go, I don't want to be compromised due to my wheel and tire size! That's all. Thanks gentleman

 

Now THAT I can understand...thanks for being clear.

First, I don't know how much tire width & backspacing you can get away with in the Electra. I really think you should try to keep the original tire height no matter your rim decision for the sake of keeping things simple with regards to the speedo.

I think some trials at a good tire shop will really be of benefit. They can look at rear and front clearances, even taking into account full jounce and rebound of the suspension as well as potential rubbing at the front at turning.

The wider the rear tire, the better the traction and the better you'll be able to put the power down.

Devon

 

ok gentlemen, thanks a mill:beers2: