Re: E body Fast ratio arms ?
[Re: Pacnorthcuda]
#2676694
07/11/19 11:59 PM
07/11/19 11:59 PM
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Joined: Feb 2010
Posts: 18,493 Granite Bay CA
Kern Dog
Striving for excellence
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Striving for excellence
Joined: Feb 2010
Posts: 18,493
Granite Bay CA
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It’s going to affect the toe setting as the tie rods will have to adjusted to accommodate the new pitman and idler. It will not affect caster or camber.
You will like it, it makes for a much more responsive set up. Oddly, when I installed mine, the alignment guy said it only moved my toe setting from zero to 1/8" out. The F/R arms are about 3/4" to 7/8" longer. If you have more than 1 1/4" of clearance with the stock stuff, you should clear just fine.
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Re: E body Fast ratio arms ?
[Re: Kern Dog]
#2677231
07/14/19 12:02 AM
07/14/19 12:02 AM
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Joined: Aug 2005
Posts: 6,008 Salem
Grizzly
Moparts Proctologist
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Moparts Proctologist
Joined: Aug 2005
Posts: 6,008
Salem
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Since this is in the handling forum, it's worthy to add that modifying your exhaust is a worthwhile thing to do to get modern day 16:1 ratio.....especially if you are running a smaller diameter steering wheel such as the Tuff Wheel. I have the Fast Ratio in a few E bodies and would never go back. I have 24:1 power and manual steering in a few others and they will eventually go into the scrap metal pile along with my space saver tires/rims, 450 wheels, frame tie down brackets, and bumper jacks/j-hooks.
Mo' Farts
Moderated by "tbagger".
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Re: E body Fast ratio arms ?
[Re: Grizzly]
#2677311
07/14/19 12:12 PM
07/14/19 12:12 PM
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Joined: May 2019
Posts: 6,290 nowhere
Sniper
master
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master
Joined: May 2019
Posts: 6,290
nowhere
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Since this is in the handling forum, it's worthy to add that modifying your exhaust is a worthwhile thing to do to get modern day 16:1 ratio.....especially if you are running a smaller diameter steering wheel such as the Tuff Wheel. I have the Fast Ratio in a few E bodies and would never go back. I have 24:1 power and manual steering in a few others and they will eventually go into the scrap metal pile along with my space saver tires/rims, 450 wheels, frame tie down brackets, and bumper jacks/j-hooks. Not sure why you think you have a 24:1 power steering box. 15.7:1 is the spec for power steering in the 67 thru 73 fsm, 65 and 66 don't say. So if you have power steering you have to do nothing to get "modern day 16:1 ratio" it been 15.7:1 since at least 1967. Not to mention that a 16:1 ratio manual box, with normal length arms, has been available since the early 60's. So I am really at a quandary wondering where you get the idea that a 16:1 ratio is modern, unless you were around when the model T was new.
Last edited by Sniper; 07/14/19 02:14 PM.
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Re: E body Fast ratio arms ?
[Re: Sniper]
#2677428
07/14/19 09:57 PM
07/14/19 09:57 PM
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Joined: Aug 2005
Posts: 6,008 Salem
Grizzly
Moparts Proctologist
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Moparts Proctologist
Joined: Aug 2005
Posts: 6,008
Salem
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Okay, it's been a really long time since I messed with these. I Have the regular power as you say in 3 cars, have power with Fast Ratio in another, have manual with Fast Ratio in another, all E bodies. I was of the understanding that the Fast Ratio power arms brought the steering to 16:1? So, does the Fast Ratio arms actually bring the power box higher? Say, 14, or 12:1? Have other vehicles that have 16:1 ratios and they steer faster than my Mopars? What am I missing here other than a Firm Feel?
Mo' Farts
Moderated by "tbagger".
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Re: E body Fast ratio arms ?
[Re: Sniper]
#2678831
07/18/19 07:36 PM
07/18/19 07:36 PM
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Joined: Jan 2010
Posts: 1,442 NW Chicago suburban area
Mopar Mitch
pro stock
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pro stock
Joined: Jan 2010
Posts: 1,442
NW Chicago suburban area
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I thought the T/A Fast Ratio made it 12.7:1?
Yes... the internal PS box ratios are actually all the same... the difference comes from the longer arms.
The factor screwed up on the E-bodies and didn't install the correct matching longer Idler arm (~70-C-Body.... aka Fast Ratio Idler)... to match the longer "FAST RATIO" Pitman Arm.
Regardless, add a smaller diameter steering wheel and you'll experience quicker steering yet!... and have the PS box rebuilt to tighter specs (IE: FF Stage 2 or preferably Stag-3).
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!
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Re: E body Fast ratio arms ?
[Re: Kern Dog]
#2679119
07/19/19 03:06 PM
07/19/19 03:06 PM
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Joined: Nov 2005
Posts: 15,119 85086
moparpollack
Lil Herman
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Lil Herman
Joined: Nov 2005
Posts: 15,119
85086
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So it is true? The Fast Ratio idler arm really is just a C body part? I recently parted out a '70 Polara and saved the Idler arm and bigger tie rod assemblies! Yes, but the clocking I believe is splined differently.
56 Plaza 63 D100 step side 67 Coronet, 68 Roadrunner, 69 Super Bees, 69 Coronet 500 convertible, 70 Roadrunner Post, 79 D150 360, and a severe case of Mopar a,d,d
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Re: E body Fast ratio arms ?
[Re: Mopar Mitch]
#2679123
07/19/19 03:11 PM
07/19/19 03:11 PM
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Joined: May 2019
Posts: 6,290 nowhere
Sniper
master
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master
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nowhere
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I thought the T/A Fast Ratio made it 12.7:1? I don't know and I can't find any documentation saying what it is, from the factory. Firm Feel's statement is based on their arm, which may or may not be identical to the factory arm and that's the only thing I could find that gave a ratio with a longer arm.
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Re: E body Fast ratio arms ?
[Re: moparpollack]
#2679576
07/20/19 10:00 PM
07/20/19 10:00 PM
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Joined: Feb 2010
Posts: 18,493 Granite Bay CA
Kern Dog
Striving for excellence
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Striving for excellence
Joined: Feb 2010
Posts: 18,493
Granite Bay CA
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So it is true? The Fast Ratio idler arm really is just a C body part? I recently parted out a '70 Polara and saved the Idler arm and bigger tie rod assemblies! Yes, but the clocking I believe is splined differently. I mentioned the idler....No splines on the idler. I figure the Pitman would be different. Thanks.
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Re: E body Fast ratio arms ?
[Re: Kern Dog]
#2679623
07/21/19 01:29 AM
07/21/19 01:29 AM
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Joined: Jan 2003
Posts: 350 central IL
myduster360
enthusiast
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enthusiast
Joined: Jan 2003
Posts: 350
central IL
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The C body Idler and Pitman has a larger diameter tapered stud too, at least compared to an A-body it is. So the drag link would need drilled and reamed to the proper size.
I've had a set of brand new Moog C-body pitman and idler arms in the garage for close to 20 years and never have got around to modifying a drag link to fit them. The cost of the tapered reamer never made economical sense unless i was doing a half dozen or so.
Last edited by myduster360; 07/21/19 01:32 AM.
1972 Swinger 3.6L Pentastar Diablo CMR tuner
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Re: E body Fast ratio arms ?
[Re: myduster360]
#2679969
07/22/19 03:13 AM
07/22/19 03:13 AM
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Joined: Jul 2005
Posts: 636 Graz, Austria
DGS
mopar
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mopar
Joined: Jul 2005
Posts: 636
Graz, Austria
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The C body Idler and Pitman has a larger diameter tapered stud too, at least compared to an A-body it is. So the drag link would need drilled and reamed to the proper size.
I've had a set of brand new Moog C-body pitman and idler arms in the garage for close to 20 years and never have got around to modifying a drag link to fit them. The cost of the tapered reamer never made economical sense unless i was doing a half dozen or so.
I think the idler stud is the same size as A,B,E but the pitman arm stud is larger (which is definitely true for 69+ C-bodies - don't know about the earlier ones).
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Re: E body Fast ratio arms ?
[Re: Kern Dog]
#2680501
07/23/19 02:23 PM
07/23/19 02:23 PM
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Joined: Jan 2010
Posts: 1,442 NW Chicago suburban area
Mopar Mitch
pro stock
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pro stock
Joined: Jan 2010
Posts: 1,442
NW Chicago suburban area
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Correct! The dubbed "Fast Ratio Idler arm" is nothing more than a standard C-body idler are (~1970 ish). It always has been, and always will be. No-one ever "invented", created or designed the "fast ratio idler arm". Those who advertise it is simply selling the C-body idler arm and tagging the marketplace dubbed name onto it ("fast-ratio idler arm"). The factory overlooked installing it on the assembly line of the e-bodies when the Fast Ratio PS box was offered in late 70... and carried on for a brief time into 71 for the e-bodies with 340 engine options only. They knew it and determined the added cost and details to get it onto the assembly line were not worth the hassles as the option was soon to be discontinued. I'd spoken with Chrysler personnel in the late 70s about this and that's what they told me. There are no splines to be concerned of when installing the idler arm. The "Fast Ratio Pitman Arm" has splines that require proper one-way-only alignment to the gear box.
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!
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