TTII backspacing with drums - Team Camaro Tech
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post #1 of 10 (permalink) Old Jan 6th, 06, 04:30 PM Thread Starter
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Gene
 
Join Date: Sep 2005
Location: Laurel Maryland
Posts: 70
TTII backspacing with drums

I have done a search for backspacing on the TTIIs and notice that some of you are running, on a 67, a 17x9.5 TTII in the rear with 5.5" of backspacing. Some with a 275 tire.

I know this may be a dumb question but I have drums all around on my 67 and was wondering if the backspacing would be different than those with discs? I plan to do the conversion to discs in the front but keep the drums in the rear. I would convert the brakes first but the setup I want to use will only work with a 17" wheel (I have 14s in the front and 15s in the rear). Any thoughts?

Here's what I was thinking, please let me know if you find any problems with this setup.

17x7 4" BS or 17x8 4 3/4 BS in the front (I can't decide 7" or 8")
235/45/17 tire

17x9.5 5.5" BS in the rear
255/45/17 tire

What about the offsets?
Also does anyone have pics of their 67 with 17" TTIIs?

thanks for all the help and sorry for the long post,
Gene
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post #2 of 10 (permalink) Old Jan 6th, 06, 09:41 PM
CJ
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Cris
 
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Location: Livermore, CA USA
Posts: 292
Re: TTII backspacing with drums

With the 235 front tire, I'd run a 8" with a 5" b.s. Do you plan on doing any suspension mods? On the rear I'd run 5.75" backspace. Keep in mind, even with a 255 rear tire you may still have to roll the rear fender from the 12 o'clock position to the 3o'clock position(looking at the driver side view).

Cris

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post #3 of 10 (permalink) Old Jan 7th, 06, 05:35 PM Thread Starter
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Gene
 
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Re: TTII backspacing with drums

for suspension mods I was thinking of changing to tubular a arms, upper and lower. lower the car about 2 inches in the front and 1 and a half in the rear with the hotchkis springs. I was also looking into the guldstrand modification.
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post #4 of 10 (permalink) Old Jan 7th, 06, 08:43 PM
CJ
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Cris
 
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Re: TTII backspacing with drums

Quote:
Originally Posted by Mean_Gene3
for suspension mods I was thinking of changing to tubular a arms, upper and lower. lower the car about 2 inches in the front and 1 and a half in the rear with the hotchkis springs. I was also looking into the guldstrand modification.
Good upgrades. With the 5" b.s. on the fronts, it will be no problem. What type of driving will you be doing withthe car? Belive it or not, it will matter when you set the alignment.

Cris

The Rides-
'68 Camaro- 388cid/Tremec TKO/Baer/Hotchkis Susp./Koni shocks/Budnik wheels/Recaro seats
'04 GMC Duramax Crew Cab- Edge Racing Juice/Banks exhaust/Weld Wheels
'73 BMW 2002
'88 BMW M5

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post #5 of 10 (permalink) Old Jan 7th, 06, 10:45 PM Thread Starter
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Gene
 
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Re: TTII backspacing with drums

Cris,

To be honest with you I would like be able to drive the car daily. I'm not planning on seriously racing it, I just want a car that handles good and one that I can take to the track on the weekends. I really like the look of the TTIIs 17" but really don't know what backspacing and offsets to go with. If 9.5s aren't necessary I can live with 17x8s all around. I just dont want to have to cut the car up to make them fit.
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post #6 of 10 (permalink) Old Jan 7th, 06, 11:29 PM
CJ
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Cris
 
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Re: TTII backspacing with drums

Safe bet is running the 8's all round. 255/45's will still fit pretty square if you buy tires with cantilever beads. Most all tires in this size are built this way. Run 235/45's up front. Once the front end work is done I'd run 1/2 to 3/4* degree negative camber and max caster. Toe in should be set at 1/16" in per side. This set up will work well for you.

Cris

The Rides-
'68 Camaro- 388cid/Tremec TKO/Baer/Hotchkis Susp./Koni shocks/Budnik wheels/Recaro seats
'04 GMC Duramax Crew Cab- Edge Racing Juice/Banks exhaust/Weld Wheels
'73 BMW 2002
'88 BMW M5

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post #7 of 10 (permalink) Old Jan 8th, 06, 01:09 AM Thread Starter
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Gene
 
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Re: TTII backspacing with drums

So to be safe I should go with 8s all around. Is that with 4 3/4 or 5" of backspacing? Thanks Cris
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post #8 of 10 (permalink) Old Jan 16th, 06, 08:36 PM
CJ
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Cris
 
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Re: TTII backspacing with drums

Go 5".

Cris

The Rides-
'68 Camaro- 388cid/Tremec TKO/Baer/Hotchkis Susp./Koni shocks/Budnik wheels/Recaro seats
'04 GMC Duramax Crew Cab- Edge Racing Juice/Banks exhaust/Weld Wheels
'73 BMW 2002
'88 BMW M5

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post #9 of 10 (permalink) Old Jan 16th, 06, 08:50 PM
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Re: TTII backspacing with drums

Is that 5 inch on all fours? I have the same delima and have disc brakes in front (Gm type from 69 Chevelle) Hotchkiss front springs and sway bar. I will be going to hotchkiss rear springs to lower and stiffin it up. Can I run a 9.5 wheels in the rear (5.5 offset or 5.75) with a 275 tire and just roll the fender lips and have no inside rubbing?

Anyone have pics on how/where to roll them? I would rather do this before it's painted.

Front's I planed on running 8 inch wheels with 235 tire and 4.5 inch backspace? Is this going to work? I plan to order AMR Polished Salt Flat wheels.

Thanks
Joe

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post #10 of 10 (permalink) Old Jan 17th, 06, 11:02 PM
CJ
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Cris
 
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Re: TTII backspacing with drums

Click on my sig. I run 265's now on the rear but in 18". I'd advise 5" front and 5.75" or 6" with rear discs. Looking at the driver side fender opening, roll the fender from the 10 o'clock to the 3 o'clock position. Mirror this onto the passenger side.

Cris

The Rides-
'68 Camaro- 388cid/Tremec TKO/Baer/Hotchkis Susp./Koni shocks/Budnik wheels/Recaro seats
'04 GMC Duramax Crew Cab- Edge Racing Juice/Banks exhaust/Weld Wheels
'73 BMW 2002
'88 BMW M5

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