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Re: 1.06" or 1.12" FF Torsion Bars, Street [Re: YO7_A66] #2437637
01/19/18 08:14 PM
01/19/18 08:14 PM
Joined: Jan 2003
Posts: 4,979
Pikes Peak Country
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TC@HP2 Offline
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TC@HP2  Offline
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Pikes Peak Country
Originally Posted By YO7_A66
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.


Firm Feel deals with a fairly broad cross section of the hobby and have raced their cars in the past. I would tend to put a pretty large chunk of faith in their recommendation. I know Mitch runs the biggest bar possible and is very happy with it. As racer, his butt dyno may be calibrated slightly different than others on here who I've seen complain that .92 are too harsh. Unfortunately there is no universal measure of harshness of ride for us to compare things. We could maybe uses frequency or cycles, but that will require a bunch of research to find comparable data to dial in what cars feel like mush, feel just right, or are too harsh. That's not easy data to get.

One thing to keep in mind is that there are many competition cars running softer spring rates with higher roll rates. You want just enough spring rate to suspend the front and give reasonable dive resistance, but control transition with a lot of shock control and let the sway bar control the corner loads.

Originally Posted By crash520
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


In my experience, larger t-bars in bracket racing will not produce optimal e.t.s, but rather will produce more consistent e.t.s.


Originally Posted By YO7_A66
RPro,
245’s up front & oversteer: Is this due to the 1.12” bars and my existing stock front sway bar?
Thanks


Oversteer is too much rear rate, understeer is too much front rate. To balance the above, try a larger front sway bar.

Re: 1.06" or 1.12" FF Torsion Bars, Street [Re: TC@HP2] #2437853
01/20/18 10:18 AM
01/20/18 10:18 AM
Joined: Jan 2003
Posts: 5,215
Indiana
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YO7_A66 Offline OP
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YO7_A66  Offline OP
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Posts: 5,215
Indiana
Thank you Mitch and HP2! It looks like I need to let this info soak in before I make my choice.
I appreciate all of the replies👍👍. It helps to see what others have already tried.


1970 YO7 A66 [Canadian Export] F8 Challenger
340 (SL.P. 226/238@.050,270/288 dur,.538"/.528" w/Yella Terra 1.65 rockers, 9.7:1, 63cc Sidewinders (Bowl Ported),RPM intake, QF SS-750 Annular DP, MSD Street Fire Ign., & TTI's. 727/Dynamic 9.5" 3800, TF-2, & 3:91's
Re: 1.06" or 1.12" FF Torsion Bars, Street [Re: YO7_A66] #2438903
01/22/18 10:46 AM
01/22/18 10:46 AM
Joined: Jan 2003
Posts: 3,487
The Netherlands
BigBlockMopar Offline
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BigBlockMopar  Offline
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Posts: 3,487
The Netherlands
Don't forget Sway-a-way which also has a nice selection of bars for most Mopar-platforms.
Better prices as well;
https://swayaway.com/product/mopar-b-torsion-bar-set/

Re: 1.06" or 1.12" FF Torsion Bars, Street [Re: BigBlockMopar] #2439259
01/22/18 11:29 PM
01/22/18 11:29 PM
Joined: Jan 2003
Posts: 5,215
Indiana
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YO7_A66 Offline OP
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YO7_A66  Offline OP
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Posts: 5,215
Indiana
The Swayaway sight shows 1.08" bars up

Thanks

EDIT: The Bergmans and the Swayaways look very similar. I wonder if they are the same manufacturer.

Last edited by YO7_A66; 01/22/18 11:32 PM.

1970 YO7 A66 [Canadian Export] F8 Challenger
340 (SL.P. 226/238@.050,270/288 dur,.538"/.528" w/Yella Terra 1.65 rockers, 9.7:1, 63cc Sidewinders (Bowl Ported),RPM intake, QF SS-750 Annular DP, MSD Street Fire Ign., & TTI's. 727/Dynamic 9.5" 3800, TF-2, & 3:91's
Re: 1.06" or 1.12" FF Torsion Bars, Street [Re: YO7_A66] #2439340
01/23/18 01:44 AM
01/23/18 01:44 AM
Joined: Jun 2007
Posts: 2,379
NorCal
RylisPro Offline
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RylisPro  Offline
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NorCal
I would have no issue getting a 1.14" bar or even a thicker TB from Sway-away, as long as they make quality parts. My 1.12" TB's will bounce up and down when you rock the front end of my car. Every other performance car at every track I run at would never do that due to their modern suspension and extremely high coil spring rates.


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