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1.06" or 1.12" FF Torsion Bars, Street #2436745
01/18/18 09:54 AM
01/18/18 09:54 AM
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Indiana
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YO7_A66 Offline OP
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I am looking into upgrading my .92" torsion bars on my 70 Challenger. 340/727,P245-60-15 & P275-60-15 tires, stock front sway bar & 3/4" rear, Viking DA shocks. Rear springs are the #3400043 (6 leafs) on both sides.

This is a street car and I plan on sticking with the 60 series tires which I assume will help absorb some of the stiffness of a larger torsion bar.
I am looking at the FF 1.06" or the 1.12" bars. I do not have any extra stiffening brackets and I don't want to add them unless needed. We have a lot of curves (round-a-bouts) and fairly smooth roads after the pot holes are filled each year up


What do you suggest?

http://www.firmfeel.com/e_body_mopar_torsion_bars.html

Thanks!


1970 YO7 A66 [Canadian Export] F8 Challenger
340 (Currently in shop for stroker assy.)
Re: 1.06" or 1.12" FF Torsion Bars, Street [Re: YO7_A66] #2436802
01/18/18 01:04 PM
01/18/18 01:04 PM
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Michigan
MarkZ Offline
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I have 300# rate springs in the front of my car, so something akin to a 1.14 bar. I ran a 60 series tire upfront for a year with those springs and loved how it handled. Wasn't too harsh at all and really leveled the car out in turns. I wish I could have gone bigger, but FF only offers one style bar for the F/J/M cars. If it were me, keeping the 60 series tires, 1.18 all day.


1987 Fifth Avenue - 512/518/D60
Re: 1.06" or 1.12" FF Torsion Bars, Street [Re: YO7_A66] #2437085
01/18/18 08:53 PM
01/18/18 08:53 PM
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moparAL Offline
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How about Hotchkiss 1.10 torsion bars with some matching adjustable shocks?

Re: 1.06" or 1.12" FF Torsion Bars, Street [Re: MarkZ] #2437114
01/18/18 09:29 PM
01/18/18 09:29 PM
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Indiana
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YO7_A66 Offline OP
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Mark,
I never considered any larger than the 1.12" for a street car. But I keep reading more about people running them and liking the ride.
Thanks


1970 YO7 A66 [Canadian Export] F8 Challenger
340 (Currently in shop for stroker assy.)
Re: 1.06" or 1.12" FF Torsion Bars, Street [Re: moparAL] #2437153
01/18/18 11:01 PM
01/18/18 11:01 PM
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Indiana
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YO7_A66 Offline OP
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Al,
I already have DA shocks and I checked the H websight and only found 1.03” for my Challenger.
Thanks

EDIT: just found the 1.1's on Jegs. 👍

Last edited by YO7_A66; 01/18/18 11:45 PM.

1970 YO7 A66 [Canadian Export] F8 Challenger
340 (Currently in shop for stroker assy.)
Re: 1.06" or 1.12" FF Torsion Bars, Street [Re: YO7_A66] #2437178
01/18/18 11:49 PM
01/18/18 11:49 PM
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Indiana
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YO7_A66 Offline OP
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After I started this thread, I contacted FF for their suggestion. FF suggested the 1.06" for spirited driving and ride compromise. FF said that the 1.12" are for racing and might be too harsh on a street car.

I am still looking for opinions from those who are driving on 60 series tires.
Thanks everyone!


1970 YO7 A66 [Canadian Export] F8 Challenger
340 (Currently in shop for stroker assy.)
Re: 1.06" or 1.12" FF Torsion Bars, Street [Re: YO7_A66] #2437181
01/18/18 11:50 PM
01/18/18 11:50 PM
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moparAL Offline
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Why Hotchkis hasn't corrected their website misprint, I don't know. Hotchkis #19367 E-body torsion bars are 1.10 diameter. Call them to verify.

Re: 1.06" or 1.12" FF Torsion Bars, Street [Re: YO7_A66] #2437187
01/18/18 11:56 PM
01/18/18 11:56 PM
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Warren, MI
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Jerry Offline
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https://swayaway.com/product-category/torsion-bars/tb-dodge/

you can try these guys too. the website is a little confusing with what they actually have, but give them a call if you want to go bigger and get stiffer torsion bars


Superior Design Concepts
2574 Elliott Dr
Troy MI 48083
jerry@sdconcepts.com
www.sdconcepts.com
Facebook page: Superior Design Concepts
www.bcrproducts.com
Re: 1.06" or 1.12" FF Torsion Bars, Street [Re: Jerry] #2437205
01/19/18 12:17 AM
01/19/18 12:17 AM
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Indiana
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YO7_A66 Offline OP
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Jerry,
I have not heard of that company before. They show 1.08" in stock.
Thanks


1970 YO7 A66 [Canadian Export] F8 Challenger
340 (Currently in shop for stroker assy.)
Re: 1.06" or 1.12" FF Torsion Bars, Street [Re: YO7_A66] #2437244
01/19/18 01:05 AM
01/19/18 01:05 AM
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Indiana
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YO7_A66 Offline OP
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I just spent some time searching E body torsion bar sizes on the web. I took a few screen shots of people writing that when running 60 series tires and a SB, and GOOD shocks, that the 1.12"-1.18" bars are still comfortable on the street!! It appears that the 60's absorb some of the road texture.
I also read that the difference between the .9" and the 1.06" bar is not that noticeable.


1970 YO7 A66 [Canadian Export] F8 Challenger
340 (Currently in shop for stroker assy.)
Re: 1.06" or 1.12" FF Torsion Bars, Street [Re: YO7_A66] #2437256
01/19/18 01:22 AM
01/19/18 01:22 AM
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Posts: 2,432
NorCal
RylisPro Offline
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I run 1.12's because I have the Hotchkis setup on my car to keep everything balanced and close with their 1.10 torsion bar recommendation. Mopar Mitch swears by 1.24's and I don't doubt him one bit. I thought about 1.24's as well but the 1.12's have performed flawlessly around the Carousel at Sonoma and the Corkscrew at Laguna Seca so no need to change them out, which keep costs down. This is on 315's at the front with no bottoming out or any major issues.

With your 245 fronts you will have understeer, so keep that in mind with your TB choice as it should match the rates for your leafs.


73 `Cuda
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Re: 1.06" or 1.12" FF Torsion Bars, Street [Re: YO7_A66] #2437327
01/19/18 05:19 AM
01/19/18 05:19 AM
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Brisbane Australia
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crash520 Offline
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I put Firm Feel 1.06 bars in my Cuda, should have gone bigger, it’s a small block

Re: 1.06" or 1.12" FF Torsion Bars, Street [Re: crash520] #2437344
01/19/18 09:01 AM
01/19/18 09:01 AM
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Indiana
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RP: excellent reference! It looks like the 1.12” is on the high end for my setup. Thanks

Crash: is this a 70-74 Cuda? What series tires and shocks? Is this a race or street car?
Thanks


1970 YO7 A66 [Canadian Export] F8 Challenger
340 (Currently in shop for stroker assy.)
Re: 1.06" or 1.12" FF Torsion Bars, Street [Re: YO7_A66] #2437356
01/19/18 10:13 AM
01/19/18 10:13 AM
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Brisbane Australia
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crash520 Offline
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It’s a 73, right now I have 15” rims but I’m going 18’s, prob 45 series, it’s mostly street driven and I have QA1 shocks, I barely noticed any difference in going larger and a lot of guys say the same, go bigger, I also drag race and some circuit track so I’ve had to compromise some

Re: 1.06" or 1.12" FF Torsion Bars, Street [Re: RylisPro] #2437362
01/19/18 10:52 AM
01/19/18 10:52 AM
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Indiana
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YO7_A66 Offline OP
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RPro,
245’s up front & oversteer: Is this due to the 1.12” bars and my existing stock front sway bar?
Thanks


1970 YO7 A66 [Canadian Export] F8 Challenger
340 (Currently in shop for stroker assy.)
Re: 1.06" or 1.12" FF Torsion Bars, Street [Re: YO7_A66] #2437375
01/19/18 11:43 AM
01/19/18 11:43 AM
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n.c.
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geo. Offline
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On my '72 Challenger with 1.14 bars and 1-1/8 sway bar, no subframe connectors,the harshness I feel is from the stock rear springs. With 245/60 15 street tires it oversteers a little with the stock E body rear bar.

Re: 1.06" or 1.12" FF Torsion Bars, Street [Re: geo.] #2437399
01/19/18 12:31 PM
01/19/18 12:31 PM
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Indiana
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YO7_A66 Offline OP
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Geo,,
What type of shocks are you running?
Thanks


1970 YO7 A66 [Canadian Export] F8 Challenger
340 (Currently in shop for stroker assy.)
Re: 1.06" or 1.12" FF Torsion Bars, Street [Re: YO7_A66] #2437443
01/19/18 01:41 PM
01/19/18 01:41 PM
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n.c.
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geo. Offline
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Front are some "Herb Adams" labeled gas shocks, not sure who made them.
Rears are Koni single adjustable hydraulic.
The Koni shocks went on back in the late '80s,
The fronts were replaced with the Herb adams, back in the 90s when one of the Konis was damaged after a track accident/brain fade!

Re: 1.06" or 1.12" FF Torsion Bars, Street [Re: YO7_A66] #2437531
01/19/18 04:01 PM
01/19/18 04:01 PM
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Posts: 1,440
NW Chicago suburban area
Mopar Mitch Offline
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Yo7 -- Your car is similar to mine Get the 1.12 or larger you won't regret it. FF has 1.18 also avlbl (their 1.06 is too weak.. forget about them)... even at 1.12 or 1.18 you'll wonder why not going a bit stiffer. Your big advantage is already having dbl adj shocks.. to fine tune your ride.

For the street (actually... highway) I run 15x8 minilite rims with BFG 255-60 and 275-60 (previously ran fronts 245-60.. but wanted a touch more ground clearance and bump absorption).. having a lowered suspension.. with my 1.24 TBs.... ride is just fine... stiff but not harsh or jaw breaking in any way. Adjustable red Konis.. full stiff front, ~1/2 stiff rear with 225# Flex-a-form mono-fiberglass leafs, 1.25" front sway bar, 1.0" rear sway bar. I also have 16" rims and short profile tires for track events.. street/hwy ok as well.

I've lowered the rear of the car as well, so there isn't as much of rake that introduces understeer with the different size tires...with the 275 rear tires there is only a slight rake, but then I typically have some items for cruising in trunk, etc... leveling off the height.

Hope this info is helpful to you.

PS: FF will make larger TBs upon request, such as 1.24 which is the max diameter to fit through the factory hex opening. The pro-TransAm e-bodies actually ran larger TBs.. around 1.44 diametar using different hex openings... so, the 1.24 TBs which I have (and a few other ppl I know) actually aren't that much stiff as many ppl think.


Last edited by Mopar Mitch; 01/19/18 04:03 PM.

Mopar Mitch "Road racers and autocrossers go in deeper and come out harder!"... and rain never stops us from having fun with our cars... in fact, it makes us better drivers! Check out MOPAR ACTION MAGAZINE, August 2006 issue for feature article and specs on my autocross T/A!
Re: 1.06" or 1.12" FF Torsion Bars, Street [Re: YO7_A66] #2437616
01/19/18 07:43 PM
01/19/18 07:43 PM
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Utah and Alaska
astjp2 Offline
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Bergman autocraft has some big TB's too, some were on sale not too long ago.
http://bergmanautocraft.com/proddetail.php?prod=5-2401

Last edited by astjp2; 01/19/18 07:44 PM.

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