Front wheel/tire fitment 66 CBR - Chevy Nova Forum
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Old 14th-April-2011, 12:57 AM   #1
cdunson

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Angry Front wheel/tire fitment 66 CBR

I'm about ready to raise the white flag here.. hoping someone has some advice to offer on this.

I have a 66 with Church Boys r/p, sway bar, CPP mini kit and CPP 2 inch drop spindle disc brake kit.

The problem: finding it extremely difficult to find a wheel style/size that I like that comes in the backspacing needed so the tire doesn't contact the CBR sway bar at full lock. What I want to run is 17s on the front and back. Up front I'd like a 17x7 with 2.25 to 2.50 backspacing. But that seems impossible to find, so I've seen spacers that go up to 1.25 inches on summit. So that would allow me some more choices but still not the wheel I had originally picked out which comes in 17x7 with 4.25 backspace. It also looks like I need to stay with a 205 size tire.. not many choices in 195

My alignment is "DIY" only at the moment, but toe-in looks ok.

1. what wheel/tire combos are you guys currently running with your Church Boys conversion?
2. whats the thickest wheel spacer I should consider using thats "safe?"
3. are there any disc brake hub/rotors that would push the wheel further out?
4. Is anyone putting in steering stops to limit the turning radius as a workaround for this issue?

Any other ways to solve this I've missed? I'm sure I could have custom wheels made but that'll be a last resort.

Last edited by cdunson; 14th-April-2011 at 12:59 AM.
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Old 14th-April-2011, 01:11 AM   #2
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you need minimum 4.5bs with those 17x7 wheels...tires 205/50/17
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Old 14th-April-2011, 01:18 AM   #3
cdunson

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Yeah 4.5 on the rear. But NO WAY that would work on the front. a 17x7 with 4.5 backspace up front leaves almost no room for a tire at full lock (tire tunred towards the sway bar) -at least on my car.
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Old 14th-April-2011, 01:26 AM   #4
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Quote:
Originally Posted by cdunson View Post
Yeah 4.5 on the rear. But NO WAY that would work on the front. a 17x7 with 4.5 backspace up front leaves almost no room for a tire at full lock (tire tunred towards the sway bar) -at least on my car.
I can get full lock and I have a sway bar?I have the same setup as you minus the r&P...am I missing something here?
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Old 14th-April-2011, 01:35 AM   #5
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do you have a 0 offset disc brake kit?
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Old 14th-April-2011, 01:40 AM   #6
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The CBR sway bar is designed different than the stock style. Not much help but 15x4 do not rubSorry, 17x7 with 4.5-4.75 are your best choices. While having the tire rub on the sway bar at full lock or close to it may bother you it will not damage the bar or tire.
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Old 14th-April-2011, 01:45 AM   #7
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Maybe I'm the one missing something. I think I do have the zero offset brake setup (see old thread I started here: http://www.stevesnovasite.com/forums...d.php?t=166843

I just know that if I try a 205/40/17 tire on a 17x7 inch rim with 4.0-4.5 backspace I'll be doing some serious rubbing on that sway bar at full lock.

anything look out of wack here?







Here's the wheel rite setup for 17x7 with 2.5 backspace and about a 205/40/17 tire



Last edited by cdunson; 14th-April-2011 at 02:35 AM.
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Old 14th-April-2011, 03:08 AM   #8
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I was running a 3rd gen Nova disc brake set-up on my 66. I had a 15X4 front rim. The rotor pushed my wheel so far outward the tires would rub my fenders. If you start adding a wheel spacer then you will be rubbing your front fenders. To me rubbing a sway bar is the lesser of the two evils.

I would not run a spacer. I would talk to some of the wheel companies to see if they are willing to build two front wheels with custom back spacing.

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Old 14th-April-2011, 08:27 AM   #9
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anything less then 4.5 bs and your gonna rub the fenders good....I know from experience...do not but 4.0 bs wheels...youre gonna be bummed if you do
ps american racing builds custom wheels
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Old 14th-April-2011, 10:57 AM   #10
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Is the thought that the drop spindles are the main culprit here?

It seems, besides those, it should fit like the same size tire in a stock front end.
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Old 14th-April-2011, 11:44 AM   #11
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Can I point out the obvious here? The front suspension is at full travel!!

Put your jack under the lower control arm (in a safe place, and distribute the load with a 2x4 to prevent bending the arm). Be sure that all front end weight is in the car - such as the engine and transmission. This will alter your measurements greatly.

I agree with the posters about 4.5" BS...
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Old 14th-April-2011, 11:49 AM   #12
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I do have a small hydraulic jack under the control arm, you might not see it in the pix. Then bounced the suspension a bit to make sure it settled. the other two jacks you may see in the pictures are just up enough to be a safety in case the one under the control arm slips. With the rest of the front end on the car it may come down slightly but as it is I only have about 3 inches from the headers to the ground, so I don't see it coming down much more.

I suppose I could pull the springs out and drop the car down a bit and see what I have then.

see pic:



Last edited by cdunson; 14th-April-2011 at 11:53 AM.
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Old 14th-April-2011, 11:54 AM   #13
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Ah, my bad... just thought I had found something easy!
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Old 14th-April-2011, 11:59 AM   #14
cdunson

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69LT1Nova

No its a good thought. everything is new, maybe it needs to settle a bit and I can check things without the springs -could be an answer there.

I'll take whatever advice I can get at this point. Thx!

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Old 14th-April-2011, 03:39 PM   #15
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Casey, per our emails you can check out Klean63's car and video at the Super Chevy Suspension challenge, there are no issues with tire fitment or function. Also with the Chuck Wagon.....17x7 with 4.5 inches of back space. The dunlop tire that we are using have the widest measurements of all the brands of the that size.....215-45-17.

Even with the bottle jack under the one side you are actually not compressing the suspension to its natural ride height. That too will make a difference. It will not be necessary to use a spacer or a brake set up that pushes the wheels outward.

Nice looking bling inside the engine bay.....how about some photos?
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