Let me start!!!!!!!!

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StPro
Posts: 336
Joined: Wed Mar 30, 2011 6:44 pm
Location: Coon Rapids MN
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Re: Let me start!!!!!!!!

Post by StPro »

So do you have the rear suspension carriage for the IRS? Is it Mark VIII or T Bird? Mark VIII had all aluminum lower control arms with air bags and aluminum center section. I took mine out of my Black Mark VIIII. I was putting in a 9" ford with ladder bars and coil overs. I know I still have some parts lying around.
Only use the brakes to stop and get gas.
Projects
65 Comet 421Stroker
93 Mark VIII Supercharged w/Fogger
70 Torino GT

SASSY
Posts: 4032
Joined: Fri Jan 06, 2006 11:32 pm
Location: Wynndel, BC CANADA

Re: Let me start!!!!!!!!

Post by SASSY »

I have the parts I need but thanks much for the thought
At the moment my plan is tubular arms and sub structure.
Mounted to the front leaf spring mounts and frame up in arch
so the car can be reverted to the 9 inch.

FRP composite mono leaf Vette rear leaf spring, shocks?
Challenge is I want it 50 inches mount face to mount face!
I want to maintain present wheels, appearance.
Hoping for 3 inches bump travel but the cv boots will be about touching each other so I have to build at least one side shortened halfshaft and test range of movement.
Fred
Last edited by SASSY on Wed Apr 29, 2020 8:46 am, edited 1 time in total.
I'd rather do it myself if it's done right or not,,,isn't that what hotrodding is all about?
Mission bc 09/12 (I think)
Roy, Brian n me
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User avatar
StPro
Posts: 336
Joined: Wed Mar 30, 2011 6:44 pm
Location: Coon Rapids MN
Contact:

Re: Let me start!!!!!!!!

Post by StPro »

I remember when the Cobras with IRS were drag racing and breaking CV shafts there were several companies selling shafts any length you wanted. That was my biggest concern racing the Mark VIII was breaking half shafts. The Mark VIII would only run low 12's. I was afraid that if I put in a high stall converter with a trans break I would need stock in an axle company. Found out the shafts in the Lincoln were smaller so they could twist without breaking.
Only use the brakes to stop and get gas.
Projects
65 Comet 421Stroker
93 Mark VIII Supercharged w/Fogger
70 Torino GT

SASSY
Posts: 4032
Joined: Fri Jan 06, 2006 11:32 pm
Location: Wynndel, BC CANADA

Re: Let me start!!!!!!!!

Post by SASSY »

Ya if I had big power and was drag racing I wouldn't be building an IRS. But 210ish hp and no intetest in going drag racing with it, should be fine. IRS in the Comet is just about being different.
Fred
I'd rather do it myself if it's done right or not,,,isn't that what hotrodding is all about?
Mission bc 09/12 (I think)
Roy, Brian n me
Image

SASSY
Posts: 4032
Joined: Fri Jan 06, 2006 11:32 pm
Location: Wynndel, BC CANADA

Re: Let me start!!!!!!!!

Post by SASSY »

Well I haven't found the enthusiasm to work on the interior even though the upholstery shop is back working so I assume my buckets will get a turn.
But I have been piddling on the IRS. I was waiting for a friend of a friend who has lathe to cut the axle but turns out it's too hard for the tooling he has to cut it, something about needing a ceramic cutter todo it,,, so I took it home put it in the chop saw and wacked 6.5 inches off it! Clamped it into a piece of heavy angle iron and put a couple tacks on it, now at least I can check to see if the thing is even close to working.
Image

I made up this very simple set of control arms to check the travel limits of the rather short axle.
My 9inch is 51.125" wide and I built these arms for one side of the suspension which would be 50.5" complete.
My goal for suspension travel was 3 inches of bump and rebound, so 6 inches of travel.
Travel is almost 7 inches to bind on narrower than required total width so WIN!
Next job is to work out the correct length and install height of the arms and build slighter better pair for final test.
From what I've read Herb Adams suspension book has some answers for roll center, camber gain etc.
Guess I'll have to phone some axle shops to see how far up my arm I have to cut it off to pay for them,, lol.
Fred
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I'd rather do it myself if it's done right or not,,,isn't that what hotrodding is all about?
Mission bc 09/12 (I think)
Roy, Brian n me
Image

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