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Author Topic: Jag suspension Pass XXO/BVGC TECH?  (Read 5342 times)

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Offline 38flattie

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Jag suspension Pass XXO/BVGC TECH?
« on: July 11, 2010, 07:23:04 PM »
First off, I realize it's probably a stupid question, but get used to it! I'll ask a lot of them!

I'm trying to get a '38 Lasalle coupe together, with a blown Cadillac flathead. It has a Jag IFS and IRS suspension. It was posed to me today that because of the nature of the suspension, ie. halfshafts and such, that this might be a problem with tech? The gent that posed it was concered that the wheel could just flop if we broke the half shafts.

Anyone answer this for me?

Thanks in advance
« Last Edit: July 16, 2010, 10:48:17 PM by 38flattie »
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With sufficient thrust, pigs fly just fine. However, this is not necessarily a good idea. It is hard to be sure where they are going to land, and it could be dangerous sitting under them as they fly overhead. -- RFC 1925

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Offline hitz

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Re: Jag suspension Pass XXO/BGALT TECH?
« Reply #1 on: July 13, 2010, 11:32:16 PM »
The wheel will flop if the halfshaft breaks. The half shafts on the Jag's don't have a reputation for breaking. The salt seems to be easy on the drive trains.

Not to worry! Have fun

Harvey
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Offline RichFox

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Re: Jag suspension Pass XXO/BGALT TECH?
« Reply #2 on: July 14, 2010, 12:09:31 AM »
It was my thought that like a 12 bolt GM rear end, you need some provision to keep everything togeather and pointed the right way if an axle breaks. If you need C clip eliminators in case of the rare axle failure, then I would think you need some retention devise for a hub carrier should a Jag axle break.
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Offline jdincau

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Re: Jag suspension Pass XXO/BGALT TECH?
« Reply #3 on: July 14, 2010, 12:19:57 AM »
 why not ask the Chief Car Inspector Steve Davies    flyingkiwi97@aol.com     (714) 671-9454 and get a definitive answer
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Offline 38flattie

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Re: Jag suspension Pass XXO/BGALT TECH?
« Reply #4 on: July 14, 2010, 12:27:37 AM »
Quote from: jdincau on July 14, 2010, 12:19:57 AM
why not ask the Chief Car Inspector Steve Davies    flyingkiwi97@aol.com     (714) 671-9454 and get a definitive answer

Actually, after I posted here, I did ask Steve. He told me it was fine.
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With sufficient thrust, pigs fly just fine. However, this is not necessarily a good idea. It is hard to be sure where they are going to land, and it could be dangerous sitting under them as they fly overhead. -- RFC 1925

You can't make a race horse out of a pig. But if you work hard enough at it you can make a mighty fast pig. - Bob Akin

http://www.flatcadracing.org/
http://youtu.be/89rVb497_4c

Offline RichFox

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Re: Jag suspension Pass XXO/BGALT TECH?
« Reply #5 on: July 14, 2010, 06:08:22 AM »
Good thing they don't let me make the rules.
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Offline Stan Back

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Re: Jag suspension Pass XXO/BGALT TECH?
« Reply #6 on: July 14, 2010, 11:07:57 AM »
I don't think that would be so bad.

Stan
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Offline 38flattie

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Re: Jag suspension Pass XXO/BGALT TECH?
« Reply #7 on: July 15, 2010, 01:16:34 AM »
Quote from: RichFox on July 14, 2010, 12:09:31 AM
It was my thought that like a 12 bolt GM rear end, you need some provision to keep everything togeather and pointed the right way if an axle breaks. If you need C clip eliminators in case of the rare axle failure, then I would think you need some retention devise for a hub carrier should a Jag axle break.

Actually Rich, This rear will have a retention on the bottem of the hub, in case an axle brakes. I'll send you some mock up pics.
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With sufficient thrust, pigs fly just fine. However, this is not necessarily a good idea. It is hard to be sure where they are going to land, and it could be dangerous sitting under them as they fly overhead. -- RFC 1925

You can't make a race horse out of a pig. But if you work hard enough at it you can make a mighty fast pig. - Bob Akin

http://www.flatcadracing.org/
http://youtu.be/89rVb497_4c

Offline problem child

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Re: Jag suspension Pass XXO/BGALT TECH?
« Reply #8 on: July 15, 2010, 04:13:07 PM »
A jag rear end is a very stout assembly. If a half shaft breaks (VERY unlikely since it's a forged piece with full size u-joints) the top of the wheel would fall inward but would remain pointed in the right direction. The diff is a Dana unit and there is no need for axle retainers.

Personally, I have never seen an axle/half shaft failure with one of these.
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Offline 38flattie

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Re: Jag suspension Pass XXO/BGALT TECH?
« Reply #9 on: July 15, 2010, 04:16:00 PM »
I've been told, since I first posted this, that the IRS may not be a very good option for Bonneville?

Comments or opinions?
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With sufficient thrust, pigs fly just fine. However, this is not necessarily a good idea. It is hard to be sure where they are going to land, and it could be dangerous sitting under them as they fly overhead. -- RFC 1925

You can't make a race horse out of a pig. But if you work hard enough at it you can make a mighty fast pig. - Bob Akin

http://www.flatcadracing.org/
http://youtu.be/89rVb497_4c

Offline Stan Back

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Re: Jag suspension Pass XXO/BGALT TECH?
« Reply #10 on: July 15, 2010, 04:22:01 PM »
There's a guy in our club that has a vintage coupe like yours -- full fendered and such with I believe a Pinto (alright -- he calls it a Mustang II) front end on it.  It got out of hand at Elmo and I saw pictures that looked like it was to almost go over  -- up on the left front wheel with the right barely touching.  I don't know if it was that drastic, but I wouldn't want to be driving it.  The surface at Bonneville is (usually) in better shape the El Mirage.  Good ol' solid axles are strong, simple and easy to maintain.  That's what I think, but what do I know.

Stan Back
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Offline 38flattie

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Re: Jag suspension Pass XXO/BGALT TECH?
« Reply #11 on: July 15, 2010, 04:52:43 PM »
Thanks Stan- that's exactly why I'm asking! I had it pointed out to me, this morning, that what I know and want for the street, and Bonneville, are two different things.

So, Halibrand quickchange 4 link in rear,or 4 link with panhard, like Jeff Brock,  and straight axle in front? Any front axle setup better than another one?
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With sufficient thrust, pigs fly just fine. However, this is not necessarily a good idea. It is hard to be sure where they are going to land, and it could be dangerous sitting under them as they fly overhead. -- RFC 1925

You can't make a race horse out of a pig. But if you work hard enough at it you can make a mighty fast pig. - Bob Akin

http://www.flatcadracing.org/
http://youtu.be/89rVb497_4c

Offline Stan Back

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Re: Jag suspension Pass XXO/BGALT TECH?
« Reply #12 on: July 15, 2010, 05:04:21 PM »
I think Jeff is using an early Dodge van.  Made heavy, sturdy, for long service, probly a good bolt pattern, too.

Ol' Jeff had never been there, didn't know what he was supposed to know -- went home with a record and had a hellava good time, too.  What a success story -- built the bomber 800 miles from nowhere.  And, as I've said before, showed up with a couple problems that the officials worked with him (not as we've told by others that they would) and is pre-entered for this year.

The low light of his trip was on a return record run, I was the first one there to tell him he missed it by 2 MPH.  He didn't.  Yeah, you're right, everyone says I'm an 
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Offline RichFox

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Re: Jag suspension Pass XXO/BGALT TECH?
« Reply #13 on: July 15, 2010, 07:26:23 PM »
I have an early Econoline front on my vega. It also has worked fine since 1980. Car runs straight. Nothing breaks. I did use a early Ford type of cross leaf spring, 4 bar, and push-pull steering. Made it like my '32. I might go rack and pinion today.
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Offline 38flattie

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Re: Jag suspension Pass XXO/BGALT TECH?
« Reply #14 on: July 15, 2010, 08:01:35 PM »
Thank Rich! I'm going to have to study on this a bit.

Quote from: Stan Back on July 15, 2010, 05:04:21 PM
I think Jeff is using an early Dodge van.  Made heavy, sturdy, for long service, probly a good bolt pattern, too.

Ol' Jeff had never been there, didn't know what he was supposed to know -- went home with a record and had a hellava good time, too.  What a success story -- built the bomber 800 miles from nowhere.  And, as I've said before, showed up with a couple problems that the officials worked with him (not as we've told by others that they would) and is pre-entered for this year.

The low light of his trip was on a return record run, I was the first one there to tell him he missed it by 2 MPH.  He didn't.  Yeah, you're right, everyone says I'm an 


Jeff spoke highly of you, but don't tell him I said so! :evil:
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With sufficient thrust, pigs fly just fine. However, this is not necessarily a good idea. It is hard to be sure where they are going to land, and it could be dangerous sitting under them as they fly overhead. -- RFC 1925

You can't make a race horse out of a pig. But if you work hard enough at it you can make a mighty fast pig. - Bob Akin

http://www.flatcadracing.org/
http://youtu.be/89rVb497_4c
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