Wheel Size Help Needed - Nova Tech
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Old Jan 17th, 20, 12:15 PM
1971NOVAGUY 1971NOVAGUY is offline
 
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Smile Wheel Size Help Needed

Hello everyone I am new to the Forum but not new to my Nova. I have a 1971 Nova recent min-tub, springs/Shackles brought in 2.75 inches (best guess). I purchased a ford 9 inch narrowed to 58.5 inches and am in desperate need for help in finding what tires I can fit under without rubbing. I would like to go as Wide as possible as engine will be making a decent amount of power. The rear end is not in the car yet but if anyone could help I would like to get rims and tires ordered as soon as possible as I know they may take some time to show up ect.


Thanks in advance
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  #2  
Old Jan 17th, 20, 01:44 PM
Big Dave Big Dave is online now
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Default Re: Wheel Size Help Needed

The way I do it when I decide to modify the rear end (which is to say back half the car) is to start out with installing the wheel tubs (or mini tubs) first. Then I measure how wide the opening is at it's narrowest (where it will rub).

Then I buy tires and wheels next. Then I put them in the wheel wells to see if I will have any contact. Nova wheel well openings are drawn in at the front and to maximize wheel size you have to modify the arch by moving the front tuck forward up to four or five inches. This is body work that I don't do so I avoided this most of the time as I had to depend upon others to finish the car in a timely fashion.

To determine how wide the axle should be I measure the distance between the wheel faces (axle faces). Finally I install the four link control arms or leaf springs so that the tires can only swing in an arc and not allow any side to side movement.

All that said, you can stand the car on it's back bumper with a 10.5 inch slick (265R60x15) if you control axle wrap up as a reaction to engine torque. If you are retaining leaf springs you can run in the nines with nothing more than an adjustable slapper bar, to get any faster you will need a pipe inside of a pipe traction bar (CalTracs is the most popular) that converts your leaf spring system into a four link with a single adjustment. With a true four link and at least five holes per bar (most have seven) you have the possibility of 625 combinations to fine tune your suspension. Pro Stock racers put those big Jegs or Summit fender skirts on their tires not to keep the sun off of their tires (what they claim even though they never last long enough for the sun to affect them), but to hide their four link set up from their competitors.

Back in the late sixties and early seventies Funny Car owners who campaigned Nova bodies would cut out seven to ten inches of the fender and move the arch up to the rear edge of the "door" to create room for a 33 inch tall 16 inch wide slick. Back then the independent teams were still using steel bodied cars on tube frames (and a BBC for power). Though people like Jungle Jim were beginning to run plastic (fiberglass) body shells and were using the less reliable, but more powerful Chrysler Hemi (the Hemi had a bad habit of exploding about a hundred feet short of the finish line due to oil pressure failures).

https://www.google.com/search?q=1969...83157138&vet=1

Big Dave
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Old Jan 17th, 20, 02:26 PM
ramportin1 ramportin1 is offline
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Default Re: Wheel Size Help Needed

This is a IFS wheel and tire sizing tool for most 5 lug vehicles (which fits our novas) and once you have your axle installed you can figure out all the sizes needed including backspacing of rims. Its 100 on Amazon, I got it to figure out my wheels for same deal, mini tub + narrowed rear. Just one way to do it

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  #4  
Old Jan 17th, 20, 11:08 PM
62 NovaWagon 62 NovaWagon is online now
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Default Re: Wheel Size Help Needed

Welcome to Team Nova!

This one works pretty good too..

https://www.summitracing.com/parts/php-01201/overview/
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