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Traction bar ??
https://slantsix.org/forum/viewtopic.php?t=68059		 Page 1 of 1
Author:  Rick Covalt [ Sun Jan 19, 2025 12:39 pm ]
Post subject:  Traction bar ??
Just a general question on traction bars. My race car ran a best of 12.70/104.7 with just clamped leak springs on the car. I am running M/T street R tires so they hold pretty well. Almost like a slick I suppose. Does anyone have any idea if a set of traction bars would be of any value on a car like mine? I have a set in the garage I could try but thought I'd ask here 1st. Best 60' times are 1.67.

PS. Since Slantzilla claims he ran a 12.70 ET I need to go at least a 12.69. :mrgreen:
Author:  Badvert65 [ Sun Jan 19, 2025 1:19 pm ]
Post subject:  Re: Traction bar ??
If you hook now without spinning, I wouldn't think you could benefit by adding traction bars.
Author:  Greg Ondayko [ Sun Jan 19, 2025 1:41 pm ]
Post subject:  Re: Traction bar ??
Cant hurt to try them. If they are awful, take them off. You are close enough to 2 tracks for testing purposes.

I Think technology has surpassed those, as you see so many HP and V8 / Boost / Nitrous Guys running Calvert's stuff.
Author:  Rick Covalt [ Sun Jan 19, 2025 3:06 pm ]
Post subject:  Re: Traction bar ??
Not usually having traction problems unless it is a no prep track! :D The traction bars are here and free. $400+ Caltracs I will probably consider once the 4 speed is in the car depending on how hard the hit is with my lawn mower cammed engine. :mrgreen:
Author:  slantzilla [ Sun Jan 19, 2025 8:42 pm ]
Post subject:  Re: Traction bar ??
I used to run clamp on slapper bars on my 66. I made shims so the rubber bumpers were just touching the cront zpring eye with me sitting in the car.

When I was spraying it I had a 8.0X26X15 ET Street on it.

Did they work?

I ran Mike when he had the Valiant running 11:70s. I 60d within .02 of him.

If your front half is clamped solid, you are already accomplishing what a traction bar does.
Author:  Charrlie_S [ Mon Jan 20, 2025 3:42 am ]
Post subject:  Re: Traction bar ??
My 66 Barracuda would 60 foot 1.76 with stock 5 leaf rear springs with the front segment clamped and the rear segment unclamped. Was on 8 x 23 x13 slicks, and 3.91 rear
Author:  Rick Covalt [ Mon Jan 20, 2025 4:13 am ]
Post subject:  Re: Traction bar ??
Yeah my best is a 1.67, usually 1.70-1.74. So not hateful for 2800# I guess. I have stock springs and I added an additional second spring to stiffen up the front section when I put in the poly front eye and hanger bushings. Thanks guys.
Author:  Charrlie_S [ Mon Jan 20, 2025 4:37 am ]
Post subject:  Re: Traction bar ??
My Cuda weighted 3250, with a 170 engine, but remember I was making a "ton" of bottom end torque. I left on the bottle. The one time it was on the dyno (at Pittsburg) it was making 358 ft/lbs at 2800 rpm on a 150 shot. I estimate something around 400 ft/lbs with the 225 shot, that I got up to.
Author:  kesteb [ Tue Jan 21, 2025 9:56 am ]
Post subject:  Re: Traction bar ??
Ah, traction bars. Bill Jenkins solution to not spitting the rear end out of a Chevy II when you drop a hot little 283 into the engine compartment and the class rules say you can't change the springs.

It is amazing how the MOPAR purists hate them. A really good propaganda job by the Direct Connection folks on how "bad" they are. Pinion snubbers, yeah... (basically the same thing) And yet those same people will be more then happy to bolt on a set of Calverts which were originally built for John Calvert's '69 Mustang. They should be using "leaf links". They are right there in the racing manuals, not hard to make either. Blessed by Mother MOPAR even. Except they don't really stabilize the pinion angle.

In the late '70s, I tried to buy a set for my then '66 Dart. The after market didn't sell them for MOPARs, you know Direct Connection. So the speed shop sold me a set for a '67 Nova. Bolted right on and you could feel the snubbers connect to the springs on launch. Did they make me faster. Well the wheels never spun and I didn't loose those back road races. So I guess they did.
Author:  Greg Ondayko [ Tue Jan 21, 2025 11:52 am ]
Post subject:  Re: Traction bar ??
What are leaf links Kevin?
Author:  slantzilla [ Tue Jan 21, 2025 2:53 pm ]
Post subject:  Re: Traction bar ??
Leaf/link was basically a Calvert bar with little or no adjustment.
Author:  Greg Ondayko [ Tue Jan 21, 2025 5:32 pm ]
Post subject:  Re: Traction bar ??
Quote:
Leaf/link was basically a Calvert bar with little or no adjustment.
Got it, thanks!
Author:  MadScientistMatt [ Wed Jan 22, 2025 10:13 am ]
Post subject:  Re: Traction bar ??
As long as they're not the sort of traction bar with the front end tied to a fixed pivot point other than the leaf spring pivot. That style of traction bar tends to work on suspensions with long, flexible front leaf sections but bind up on Mopars. Slapper bars won't be an issue.
Author:  kesteb [ Thu Feb 20, 2025 3:36 pm ]
Post subject:  Re: Traction bar ??
A leaf link was an upper bar and lower leaf spring, one per side. The axle pivoted on the spring so there was no binding of the spring. The problem is that the upper bar is stationary and the lower spring extends, so the pinion pivots when the axle goes up and down. Chrysler tried this setup in the early days of pro-stock, before the tube chassis cars took over.
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