Mopar IRS
#965877
04/04/11 04:26 PM
04/04/11 04:26 PM
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Joined: Sep 2009
Posts: 319 Denver
Explodo
OP
enthusiast
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OP
enthusiast
Joined: Sep 2009
Posts: 319
Denver
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A couple of years ago I posted about Blue Moon Motorsports making an IRS for mopars. That's definitely dead as of January of this year. With Heidt finally fixing their IRS to have an upper control arm, that looks to be a possibility, though one with a little bit of fabrication involved.
Does anyone know of any other routes to an independent rear on a classic mopar? I don't care about drag racing at all, so typical "IRS = bad for drag" concerns are moot.
'67 440 Satellite
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Re: Mopar IRS
[Re: RodStRace]
#965879
04/04/11 05:54 PM
04/04/11 05:54 PM
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Joined: Sep 2009
Posts: 319 Denver
Explodo
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enthusiast
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OP
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Joined: Sep 2009
Posts: 319
Denver
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I'm okay with taking partial bits, like I'd have to do on the new Heidt thing, and then adapting it to work for me, but I distrust my ability to properly build a complete cradle that includes all mounting points for the arms and everything.
My impression was that for the LX or Viper rears I'd have to build everything. Am I incorrect in that? Are they sub-assemblied enough that just an adapter need be fabricated?
Edit: Okay, the LX is a subframe, but I can't find a complete picture of one anywhere. Anyone have a link?
Last edited by Explodo; 04/04/11 06:54 PM.
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Re: Mopar IRS
[Re: Cudajon]
#965883
04/04/11 10:48 PM
04/04/11 10:48 PM
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Joined: Jan 2008
Posts: 299 East Brunswick, NJ
finadk
enthusiast
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enthusiast
Joined: Jan 2008
Posts: 299
East Brunswick, NJ
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I looked into doing something like this for my 56 Dodge. I thought that the ford setup seemed clunky and modifying the width of the cradle created complications. I dont like the inboard brakes on the Jaguar setups that much. Corvette C4 components seem to be about the best option. Here is a link to a real nice setup 57 Chevy from the tri-five website that can give you some good ideas on what can be done. There would be a fair amount of fabrication involved but its is doable. http://www.trifive.com/forums/showthread.php?t=30205 Scott
Scott
1956 Dodge Custom Royal Lancer (408 Stroker, 4 Wheel Disc Brakes, Rack & Pinion, 6 speed)
2002 Dodge Ram 1500 Quad Cab
1976 Corvette
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Re: Mopar IRS
[Re: Bad340fish]
#965886
04/05/11 11:40 AM
04/05/11 11:40 AM
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Joined: Jan 2005
Posts: 12,419 Kalispell Mt.
HotRodDave
I Live Here
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I Live Here
Joined: Jan 2005
Posts: 12,419
Kalispell Mt.
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The cool thing about IRS is the ability to plant the tires without even haveing an LSD now if you add one it will really help. Think about it, the reason a live axle open rear wants to spin the right rear tire is the tq from the driveshaft is lifting that side of the axle and planting the other, with an IRS suspension the suspension moves instead of the whole axle picking up the right side. The lifting/planting action is lost in the CV axle. Even with no LSD they hook nearly as good as a straight axle.
I am not causing global warming, I am just trying to hold off a impending Ice Age!
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Re: Mopar IRS
[Re: HotRodDave]
#965887
04/05/11 01:03 PM
04/05/11 01:03 PM
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Joined: Feb 2007
Posts: 612 Nampa, ID
None2Slow
mopar
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mopar
Joined: Feb 2007
Posts: 612
Nampa, ID
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That Ford rear is an 8.8 rear with 4.25 bolt circle. The cobra hubs will bolt on and give you the 4.5 you want. Not all tbirds had the 8.8, but had the 4.25 bolt pattern. The standard v6 had a 7.5. The SC v6 birds had the 8.8 traclok rear. Not all v8 birds had the 8.8 and if they did, may not have had traclok. If you go to www.sccoa.com you will get all the answers you need, including dementions.
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Re: Mopar IRS
[Re: roadrunninMark]
#965888
04/05/11 01:40 PM
04/05/11 01:40 PM
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Joined: Jan 2003
Posts: 16,123 Grand Haven, MI
patrick
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 16,123
Grand Haven, MI
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Quote:
I think the IRS out of a Lincoln Mark VIII is what you are looking for, I believe they have a cradle system. Also, I thought about using the IRS out of 88-89 Conquest/Starion. This rear might not hold as much power as the 8, but it is Mopar (well, sort of)
could look at the IRS in newer ford explorers, too....
1976 Spinnaker White Plymouth Duster, /6 A833OD 1986 Silver/Twilight Blue Chrysler 5th Ave HotRod **SOLD!*** 2011 Toxic Orange Dodge Charger R/T 2017 Grand Cherokee Overland 2014 Jeep Cherokee Latitude (holy crap, my daughter is driving)
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