Need advice, what parts to use for an A body open track car
#1968748
12/13/15 01:42 AM
12/13/15 01:42 AM
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Joined: Nov 2006
Posts: 6,005 Reno, Nevada
NV69B7RR
OP
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OP
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Joined: Nov 2006
Posts: 6,005
Reno, Nevada
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I'm building up my Demon to be an Open Track/ Autocross/ Optima car. I have quite a few spare parts lying around and could use some advice on what would be best to use for the build. I planned on using the Hotchkis TVS system (rather than mixing and matching parts), w fox shocks, and1:06 Firm Feel T bars.
For brakes I wanted to use either the Dr Diff kit (13" Cobra) or the 11.75 with Viper calipers. Which brake system would be better? For the rears (BBP) I have a set of B Body 11" drums already, but wanted to go with the Dr Diff rear disc kit. Here's where I could use some advice on which parts to use:
1) I plan on using a 73 spool mount K frame, but do have a 72 340 K frame too. Spool mount the best choice?
2) Control Arms (will be reinforced) with sway bar tabs. I have a set of 73's and 71's. (I also have several drag links too: v-8, 6cyl, 73+v8, etc) Is there any advantage to using either one?
3) Spindles. I have a set of 73+ A Body discs, or 70 E body Drums. Can you use the Cuda spindles on an A body, if I went with the Viper calipers?
4) Factory disc proportioning block (73+ disc A body) or use an adjustable one?
When it comes to tire availability is it better to run 17's or 18's? I plan on using 275's in front and 315's in the rear (The rear is mini tubbed and the front will be modified as needed). Thanks for the advice ahead of time.
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Re: Need advice, what parts to use for an A body open track car
[Re: NV69B7RR]
#1968765
12/13/15 02:13 AM
12/13/15 02:13 AM
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Joined: Dec 2010
Posts: 12,375 SoCal
MuuMuu101
I got lucky at Woodward!
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I got lucky at Woodward!
Joined: Dec 2010
Posts: 12,375
SoCal
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If I were to do it again, I'd probably would have gone with the Viper front brake kit, but still kept the Dr Diff rears in the back. The Viper kit uses pretty thick truck rotors and since it is smaller, it should have less rotational inertia. Plus, the Viper calipers are pretty decent. Your problem is finding an affordable Viper caliper used.
As for wheels and tires, I'd go with 18" wheels. At least 9" wide if not a tad wider in the front. Try to find a lightweight wheel. I was trying to find a set of Enkei's that fit my car, but since my wheel tubs were so small and my offsets were different, it didn't happen. When I get the fenders rolled and my offset shackles installed, I should be able to fit 18 x 9.5" wheels all the way around with 275/35/18's all with the same backspacing so I have rotatability.
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Re: Need advice, what parts to use for an A body open track car
[Re: NV69B7RR]
#1968766
12/13/15 02:16 AM
12/13/15 02:16 AM
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Joined: Dec 2003
Posts: 22,696 Bitopia
jcc
If you can't dazzle em with diamonds..
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If you can't dazzle em with diamonds..
Joined: Dec 2003
Posts: 22,696
Bitopia
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Would like to know first what kinda of power are we looking at here, as that kinda tells us kinda the speeds you will be braking from and how hard/deep you will be braking from, next what are your goals at the beginning of the project, and then what at the end? The 1.06" TB gives me a idea what level you are on, just want to make sure advice is in sync with your thinking. Quick thoughts: 1. Add power later 2. Forget LCA reinforcement 3. Go square on tires 4. Go two steps higher on TB for starts 5. Go with the least investment Discs you currently own, cool/duct the heck out of them, drive them until you get seat time and they start to fade, THEN upgrade, same for rears but after upgrading fronts, repeat 5.1 definitely add adjustable brake bias, it will change with every other change you make 6. Ditch ANY weight you can, its really cheap 7. Get seat time, ecen with a slant six 8. you can never go too big on tires, 18's have a better future 9. Kissing the Beauty queen in the winners circle will take time.
Last edited by jcc; 12/13/15 02:23 AM.
Reality check, that half the population is smarter then 50% of the people and it's a constantly contested fact.
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Re: Need advice, what parts to use for an A body open track car
[Re: NV69B7RR]
#1968929
12/13/15 02:21 PM
12/13/15 02:21 PM
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Joined: Feb 2011
Posts: 4,302 Nebraska
72Swinger
master
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master
Joined: Feb 2011
Posts: 4,302
Nebraska
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Go all the way to 1.18 on tbars, it will save you from having to buy them later.
Mopar to the bone!!!
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Re: Need advice, what parts to use for an A body open track car
[Re: 72Swinger]
#1969065
12/13/15 06:30 PM
12/13/15 06:30 PM
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Joined: Jan 2003
Posts: 27,468 So Cal
autoxcuda
Too Many Posts
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Too Many Posts
Joined: Jan 2003
Posts: 27,468
So Cal
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Go all the way to 1.18 on tbars, it will save you from having to buy them later. I agree. Tim Werner's red Valiant has 1.24" T-bars and iirc, rear drums. K-member is a mixed bag. 69-72 has more room for Milodon road race pan. 73-76 had less room but has narrow sway bars for the high backspace rims you'll need with 275 or 315 18" front tires and rims.
Last edited by autoxcuda; 12/13/15 06:30 PM.
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Re: Need advice, what parts to use for an A body open track car
[Re: NV69B7RR]
#1969123
12/13/15 08:40 PM
12/13/15 08:40 PM
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Joined: Nov 2006
Posts: 6,005 Reno, Nevada
NV69B7RR
OP
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Thank you all for the replies. I will go with the bigger bars. Great point about using the narrower sway bar. I'm doing a cage similar to 72Swingers with a removable X bar. I have followed and taken notes on most of the builds on here and other forums for years now. I have a really good idea of what I want to do with the car as I've been building it in my head for years.
Last edited by NV69B7RR; 12/13/15 08:43 PM.
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Re: Need advice, what parts to use for an A body open track car
[Re: NV69B7RR]
#1969251
12/14/15 01:10 AM
12/14/15 01:10 AM
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Joined: Feb 2011
Posts: 4,302 Nebraska
72Swinger
master
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master
Joined: Feb 2011
Posts: 4,302
Nebraska
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If you use Hotchkis front 67-72 swaybar, you will not have any clearance issues. 18x9 on a 275
Mopar to the bone!!!
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Re: Need advice, what parts to use for an A body open track car
[Re: NV69B7RR]
#1969701
12/14/15 08:52 PM
12/14/15 08:52 PM
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Joined: Nov 2006
Posts: 6,005 Reno, Nevada
NV69B7RR
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Reno, Nevada
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I'd like it to handle as good or better than my 89 Saleen did, if I'm comparing it to something. The area around me has some incredible twisty mountain roads, as well a road course (fernley) and autocross events. So I'm not building it for one set class to compete in. For now I planned to use the Hotchkis rear leaf springs. I am not opposed to piecing parts together for what works best, as thats what I've done in the past on builds. I just thought using the TVS kit would be a great place to start. I have looked at the Control Freak products ( http://www.freakride.com/product/mopar-4-link-coil-over-rear-suspension-systems-copy/ ) and would probably go that route for the 4 link rear end down the road if I really wanted to get serious.
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Re: Need advice, what parts to use for an A body open track car
[Re: NV69B7RR]
#1969821
12/14/15 11:41 PM
12/14/15 11:41 PM
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Joined: Jan 2003
Posts: 1,482 Lake Orion, MI
goldduster318
pro stock
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pro stock
Joined: Jan 2003
Posts: 1,482
Lake Orion, MI
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For the street, the 1.06's are fine with the Hotchkis/Fox shocks, and 18's. The ride is actually pretty good. I have some ESPO 6 leafs in the back, MP Offset shackles, and the hotchkis front and rear sway bars. 275-35-18 all the way around. For a street setup, it's pretty good. I think you'd want more rate for a track car.
'70 Duster 470hp 340/T56 Magnum/8 3/4 3.23 Sure-Grip
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Re: Need advice, what parts to use for an A body open track car
[Re: NV69B7RR]
#1970152
12/15/15 02:08 PM
12/15/15 02:08 PM
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Joined: Feb 2011
Posts: 4,302 Nebraska
72Swinger
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master
Joined: Feb 2011
Posts: 4,302
Nebraska
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I use a Hellwig E body rear bar .:)
Mopar to the bone!!!
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Re: Need advice, what parts to use for an A body open track car
[Re: NV69B7RR]
#1970618
12/16/15 01:31 AM
12/16/15 01:31 AM
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Joined: Feb 2011
Posts: 4,302 Nebraska
72Swinger
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master
Joined: Feb 2011
Posts: 4,302
Nebraska
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Because its 7/8" instead of 3/4" for the A-body version.
Mopar to the bone!!!
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Re: Need advice, what parts to use for an A body open track car
[Re: NV69B7RR]
#1970773
12/16/15 01:02 PM
12/16/15 01:02 PM
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Joined: Feb 2011
Posts: 4,302 Nebraska
72Swinger
master
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master
Joined: Feb 2011
Posts: 4,302
Nebraska
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I have no idea the rate. The bars look identical though other than diameter. I know it works really well autox'ing on the stiffest setting. Open track its good on its softest. This could change with new tires but its nice to have 4 different settings to play with, 3 holes plus unhooked.
Mopar to the bone!!!
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