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Old 07-21-2009, 03:44 PM   #1
rpol7966
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Default Jag IFS

I have done a number of searches looking for information on the Jag IFS swap into various vehicles. It's my understanding that the Series 3 XJ6/XJ12 seems to be the most popular donor vehicle. This suspension was used between '79 and '87 on the XJ6 and through '92 on the XJ12.
I am wanting to know if the earlier Series 2 front suspensions can be used. Are there major differences between the Series 2 and Series 3 IFS units.
I hope that someone can provide some useful information.
Thanks, Tim
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Old 07-21-2009, 05:14 PM   #2
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Default Re: Jag IFS

Well ya must not be doin it right this poped up last night,

http://www.jalopyjournal.com/forum/s...d.php?t=381637
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Old 07-21-2009, 05:17 PM   #3
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Default Re: Jag IFS

Quote:
Originally Posted by Rodhotz View Post
Well ya must not be doin it right this poped up last night,

http://www.jalopyjournal.com/forum/s...d.php?t=381637
That thread is about IRS he is looking for info on IFS. I think TMAN did something once on his chevy. Look up him.
I may be wrong though. I was once before.
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Old 07-21-2009, 06:36 PM   #4
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Default Re: Jag IFS

Quote:
Originally Posted by flatblackindustries View Post
That thread is about IRS he is looking for info on IFS. I think TMAN did something once on his chevy. Look up him.
I may be wrong though. I was once before.
Some guy named zman did it on a Buick.
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Old 07-21-2009, 06:51 PM   #5
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Default Re: Jag IFS

This might help

http://www.uk-hotrods.co.uk/v2/garag.../me/page_1.php
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Old 07-21-2009, 06:51 PM   #6
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Default Re: Jag IFS

Quote:
Originally Posted by zman View Post
Some guy named zman did it on a Buick.

Damnit...I was wrong...That makes twice.
Do I get half credit for being sort of close?
Sorry ZMAN..
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Old 07-21-2009, 07:23 PM   #7
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Default Re: Jag IFS

Quote:
Originally Posted by rpol7966 View Post
I have done a number of searches looking for information on the Jag IFS swap into various vehicles. It's my understanding that the Series 3 XJ6/XJ12 seems to be the most popular donor vehicle. This suspension was used between '79 and '87 on the XJ6 and through '92 on the XJ12.
I am wanting to know if the earlier Series 2 front suspensions can be used. Are there major differences between the Series 2 and Series 3 IFS units.
I hope that someone can provide some useful information.
Thanks, Tim
Series 1, 2 and 3 XJ6 or XJ12 - all the same. XJ-S - all the same.

The only difference is that V12 cars had heavier front coils.
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Old 07-21-2009, 07:27 PM   #8
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Default Re: Jag IFS

one is a wider track than the other, forgot witch one it though. remembered xke is the odd ball one.
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Old 07-21-2009, 08:18 PM   #9
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Default Re: Jag IFS

Quote:
Originally Posted by Rodhotz View Post
one is a wider track than the other, forgot witch one it though.
No, not if you are referring to the front or rear suspensions of Series 1, 2 or 3 XJ6's or XJ12's, or any of the XJ-S cars (6 or 12 cylinders).

E-Types (again, Series 1, 2 or 3) had different front suspensions and a narrower rear (of the same type).

There are also some other Jags that used these same front and rear ends, for example the Mark 10 IIRC.
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Old 07-21-2009, 08:28 PM   #10
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Default Re: Jag IFS

plym49 is correct. the front suspensions on all of the series 1,2 & 3 along with the XJ-S type cars interchange with only spring differences. The rears same thing along with the MK-10 and 420G. The other two track widths are the Six cylinder E (the narrowest) then the V-12 E and the 3.4/3.8 S-types and the 420 (different than the 420G)
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Old 07-21-2009, 08:29 PM   #11
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Default Re: Jag IFS

The MK-10 Front suspension is NOT the same as the XJ-6/12 - XJ-S. Although the MK-10 front suspension is good, it is hard to mount. It does however have a forged I beam crossmember.
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Old 07-21-2009, 08:31 PM   #12
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Default Re: Jag IFS

Quote:
Originally Posted by flatblackindustries View Post
Damnit...I was wrong...That makes twice.
Do I get half credit for being sort of close?
Sorry ZMAN..

better than half...

http://www.jalopyjournal.com/forum/s...ight=buick+jag
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Old 07-21-2009, 08:44 PM   #13
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Default Re: Jag IFS

Quote:
Originally Posted by jagfxr1949 View Post
The MK-10 Front suspension is NOT the same as the XJ-6/12 - XJ-S. Although the MK-10 front suspension is good, it is hard to mount. It does however have a forged I beam crossmember.
You are correct...........
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Old 07-22-2009, 06:01 AM   #14
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Default Re: Jag IFS

Thanks for all of your responses. I'm in the process of gathering parts for my truck project, a '50 Ford F1. Still looking for the Jag IFS and wasn't sure what front units were the same. I knew the Series 3 IFS was being used in the truck swaps. The Ford Truck Enthusiast forum has been a helpful resource but The HAMB can't be beat.
Anyone know of a Jag IFS that's available? Thanks, Tim
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Old 07-22-2009, 09:22 AM   #15
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Default Re: Jag IFS

Tim, I found one on C/L for 300$ offered him 400$ if he delivered it, cheaper than buying the rear out of a junkyard. 74 xj12l w/title it might run with new gas, sat in a garage for a couple of years older couple with health problems owner gave it to the neghbor for helping around the farm. He was 70 miles away in Mo. your should be able to find one too! tt
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Old 07-22-2009, 10:09 AM   #16
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Default Re: Jag IFS

I'm tempted to buy this...
http://kansascity.craigslist.org/cto/1273178734.html
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Old 07-22-2009, 10:25 AM   #17
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Default Re: Jag IFS

I've gotten whole Jags for as cheap as $100. They are out there...
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Old 07-22-2009, 10:40 AM   #18
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Default Re: Jag IFS

I've done one on my 50 chevy sedan and one on a 50 Ford F2 Pickup. Also have magazine article on fitting one to a 50 pickup. Main difference is the width. Series 3 I believe is wider.
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Old 07-22-2009, 11:09 AM   #19
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Default Re: Jag IFS

I have an 88 xj6 that has a blown seal in the rack so its parked. Im wanting to make it a donor for the proper project. Heck I'll sell it and finance a current project.
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Old 07-22-2009, 07:58 PM   #20
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Default Re: Jag IFS

Quote:
Originally Posted by oldgoaly View Post
Tim, I found one on C/L for 300$ offered him 400$ if he delivered it, cheaper than buying the rear out of a junkyard. 74 xj12l w/title it might run with new gas, sat in a garage for a couple of years older couple with health problems owner gave it to the neghbor for helping around the farm. He was 70 miles away in Mo. your should be able to find one too! tt
That's actually a desirable car. You can make plenty parting it out. Or resell t to some Jag enthusiast who will restore it, and then use the proceeds to buy the pieces you need to do your swap.
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Old 07-22-2009, 08:20 PM   #21
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Default Re: Jag IFS

Series3 is best. Series 2 &3 have ventilated discs & 4 pot calipers, series 1 brakes are solid with 3 pot calipers, not as good. Series 2 steering rack has a longer input shaft area. I have put a series 3 into a 36 ford coupe, a bit wide, but with factory wheels it is OK, steering column position is very close to original.
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Old 07-22-2009, 08:34 PM   #22
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Default Re: Jag IFS

More neat things about Jag suspensions: Chevy front wheel bearings. Chevy 4 3/4 bolt circles (although the center hub opeining is a different size).
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Old 07-22-2009, 08:48 PM   #23
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Default Re: Jag IFS

Quote:
Originally Posted by kustoman View Post
Series3 is best. Series 2 &3 have ventilated discs & 4 pot calipers, series 1 brakes are solid with 3 pot calipers, not as good. Series 2 steering rack has a longer input shaft area. I have put a series 3 into a 36 ford coupe, a bit wide, but with factory wheels it is OK, steering column position is very close to original.
that answers the question "will it work for my 38' ford truck"? answer "too wide."
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Old 07-22-2009, 11:18 PM   #24
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Default Re: Jag IFS

58 1/2" track with stock wheels, 61" flange to flange, see attached photo with 205/65 x 15 tire
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Old 07-23-2009, 12:45 AM   #25
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Default Re: Jag IFS

Quote:
Originally Posted by kustoman View Post
Series3 is best. Series 2 &3 have ventilated discs & 4 pot calipers, series 1 brakes are solid with 3 pot calipers, not as good. Series 2 steering rack has a longer input shaft area. I have put a series 3 into a 36 ford coupe, a bit wide, but with factory wheels it is OK, steering column position is very close to original.
Are there any Identifing marks that will tell you what Series your looking at with out getting into the brakes. Or is there a code on V.I.N. tag?
Anybody know how these would mate up in a 57chevy.

I'M Speaking of I F S rear doesn't look to bad pretty straight Forward.
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Old 07-23-2009, 08:53 PM   #26
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Default Re: Jag IFS

Quote:
Originally Posted by 2manyprojects View Post
Are there any Identifing marks that will tell you what Series your looking at with out getting into the brakes. Or is there a code on V.I.N. tag?
Anybody know how these would mate up in a 57chevy.

I'M Speaking of I F S rear doesn't look to bad pretty straight Forward.
I would not get hung up on which one it is. The differences are insignificant, and all of the parts are interchangeable regardless. Even the 'worst' Jag brakes are light years better than anything else you will run on a hot rod.

Get one at a good price, don't obsess about which one it is, and enjoy. You will never regret it.
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Old 07-24-2009, 02:27 AM   #27
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Default Re: Jag IFS

Quote:
Originally Posted by plym49 View Post
Get one at a good price, don't obsess about which one it is, and enjoy. You will never regret it.
You seem quite knowledgable about jaf stuff, have you done or do you regularly swap jag front end gear into hotrods? Photos and a thread please??!!
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Old 07-24-2009, 03:20 AM   #28
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Default Re: Jag IFS

Quote:
Originally Posted by Bash'n'Weld View Post
You seem quite knowledgable about jaf stuff, have you done or do you regularly swap jag front end gear into hotrods? Photos and a thread please??!!
bash n weld, what part of NZ are you in? I've done several jag front and rear swaps and would be happy to help out.
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Old 07-24-2009, 03:23 AM   #29
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Default Re: Jag IFS

Pics of my '46 pickup chassis. series 2 xj12 front and rear.
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Old 07-24-2009, 03:34 AM   #30
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Default Re: Jag IFS

4t6ford

how are you mate, I am working thru the process of putting a xj6 front end into my 52 chev, the only snag i have is that the springs are obviously stiffer , the jag motor being heavier and mounted further forward. do you have any suggestions for different springs . any info would be of help.

cheers

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Old 07-24-2009, 03:36 AM   #31
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Default Re: Jag IFS

Looks good...
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Old 07-24-2009, 03:42 AM   #32
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Default Re: Jag IFS

Quote:
Originally Posted by Big Jon View Post
4t6ford

how are you mate, I am working thru the process of putting a xj6 front end into my 52 chev, the only snag i have is that the springs are obviously stiffer , the jag motor being heavier and mounted further forward. do you have any suggestions for different springs . any info would be of help.

cheers

jonno
Jonno, if you are running SBC in your '52 you can trim the stock xj6 springs. Depending on the ride hieght you want take between 1/2 and 1 coil off each spring.
My Jailbar (pictured above) runs sbc and has 1 coil off each side.
My F100 ('53) runs big block ford and runs stock jag springs (thanks lifstyles!) as the heavier engine meant trimmed ones were too short.

p.s. brother in law has sbc in '52 chev with jag ifs . We've done the same with his.
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Old 07-24-2009, 03:48 AM   #33
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Default Re: Jag IFS

4t6ford

thanks for the info, i am running sbc , did cutting the spring stiffen the ride or is all ok.
how much did the chev drop by cutting 1 coil off ?

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Old 07-24-2009, 03:58 AM   #34
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Default Re: Jag IFS

In theory cutting a coil off does change the spring rate (imagine the spring "unwound" to a straight bar - the shorter the bar the harder it is to bend ).

The '52 with the sbc in it (I've done 2 of em) will sit hard UP on the snubbers on the top arm with the stock spring in it ( even with all the front clip assembled) . With the coil off at ride height the bottom arms are still not quite level (arms go up as they head in to crossmember) and no the ride is not harsh .
There are a couple different front swaybars too, I have a light one in the jailbar and the heavier style in the f100.
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Old 07-24-2009, 04:05 AM   #35
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Default Re: Jag IFS

I have rolled the front end under the chev and lowered the weight down on to it, and correct it didn't budge of the bumps i then got my big fat arse up on the chassis rail as well and it still didn't move much. did you do anything special when you cut the coil ?

what did you use as a steering colum ?
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Old 07-24-2009, 04:18 AM   #36
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Default Re: Jag IFS

just use a 1mm cut off wheel for the trimming.
We used a nissan cefiro column in the brother in laws car.
I've also used the original column , just cut the box off and trim it to lenght required , bearing in the bottom and machine the Jag spline onto the inner of the column. If you are stting the jag subframe up on the stock jag mounts you need to use the first section of jag column as it has a 'slip' in it to take up the movement under braking/cornering of the rubber mounts.

If you're setting it up solid mounted you shouldn't need the slip.
I did a '52 for a guy here and he wanted it solid mounted so that he could have the car as low as possible. i'll find a pic...
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Old 07-24-2009, 04:29 AM   #37
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Default Re: Jag IFS

thanks mate this has been really helpful

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Old 07-24-2009, 04:40 AM   #38
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Default Re: Jag IFS

Jonno I'm struggling to find the pics I wanted to post for you. I'm looking at the pic of the rear of your '52 and I think you'll find that doing the front like I've suggested will work out pretty good . Don't be afraid to PM if you need more info as you get into it.
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Old 07-24-2009, 04:56 AM   #39
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Default Re: Jag IFS

when i dragged the old girl home, she was sitting high in the rear, it had a mixture of camaro leafs and the originals together ,had them dearched and added a lowering block and it ended up dropping the rear 8 inches . by putting the jag ifs in it should drop the front 4 inches and level it all out. the only problem is i can't get the old girl out my drive i need to build a ramp to get her across the gutter.so it must be the right height.

cheers
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Old 07-24-2009, 05:28 AM   #40
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Default Re: Jag IFS

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Originally Posted by 4t6ford View Post
bash n weld, what part of NZ are you in? I've done several jag front and rear swaps and would be happy to help out.
Cool photos, I'm in Hawkes Bay and when I finally get round to it, I'll be using both IFS and IRS out of a series 1 XJ6 in the '52 Chevy.
I'm using the original Splash Fed engine, will I need to trim any springs or just run as is?
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Old 07-24-2009, 05:37 AM   #41
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Default Re: Jag IFS

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Cool photos, I'm in Hawkes Bay and when I finally get round to it, I'll be using both IFS and IRS out of a series 1 XJ6 in the '52 Chevy.
I'm using the original Splash Fed engine, will I need to trim any springs or just run as is?
your splash fed donk is prob similar weight to sbc, I'd prob mount it all up first and you can always drop the springs out for a haircut later .

you'll find that if you leave the rear end in its cage it'll go almost straight under.
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Old 07-24-2009, 05:42 AM   #42
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Default Re: Jag IFS

I am using the original jag front springs in my ride.
I have a Caddy 500 in it and that engine is little different to the weight of an original 4.2 Jag engine.. Still undecided on sway bay size though..
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Old 07-24-2009, 05:57 AM   #43
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Awesome, cheers for the info!
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Old 07-24-2009, 07:37 PM   #44
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Default Re: Jag IFS

Quote:
Originally Posted by Bash'n'Weld View Post
You seem quite knowledgable about jaf stuff, have you done or do you regularly swap jag front end gear into hotrods? Photos and a thread please??!!
I was very deeply into Jags for quite a few years. Finally got out of them; they are beautiful and drive like nothing else but it was getting to be more work than fun.
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Old 08-04-2009, 12:29 PM   #45
Johnyeyeball
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Wink Re: Jag IFS

hey guys my name is johnny I'm new to the forum. I have a 49 F-1 and i recently installed a 87 series 3 J in my truck. I cant begin to tell you how bitchen it is or how easy the application is. I'm going as low as i can and if you want it can be bagged very simply I think (bags are for groceries) but to each is their own.
the install is a few measurement for location and it welds to the frame rails like a cross member its that simple and pars are readily available and its got a decent rack for nicer steering.
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Old 08-04-2009, 02:53 PM   #46
Bash'n'Weld
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Default Re: Jag IFS

Johnyeyeball, maybe you can follow this up with a build thread including pictures?

BTW, it might be a good idea to go to the introduction page and say hello, some people on here may get upset if you don't follow the rules.

Welcome to the HAMB.
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Old 08-08-2009, 10:27 PM   #47
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Default Re: Jag IFS

Here's the xj6 with coil-overs on my A. The stock springs were way too stiff. By the way I liked the Jag steel wheels, they look a bit like the old artillery wheels.




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Old 08-09-2009, 03:16 AM   #48
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Default Re: Jag IFS

Quote:
Originally Posted by plym49 View Post
Series 1, 2 and 3 XJ6 or XJ12 - all the same. XJ-S - all the same.

The only difference is that V12 cars had heavier front coils.
Series 1 2 and 3 are all different - but you would need to be a Jag nut like me to pick it.

It's not worth worrying about unless your'e doing a concourse resto. But then you wouldn't be on the HAMB, would you?
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Old 08-09-2009, 04:06 AM   #49
X38
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Default Re: Jag IFS

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Originally Posted by toddc View Post
Series 1 2 and 3 are all different
Yep. But if you use a whole one as is, no issues.
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Old 08-09-2009, 04:49 AM   #50
LIFESTYLZ
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Default Re: Jag IFS

Depends whether you want solid discs or ventilated ones. 4 pot discs or 3 pot ones.. These are really the only differences apart from sway bar diameter, which varies a bit.

.

Last edited by LIFESTYLZ; 06-07-2010 at 03:38 PM.
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Old 08-09-2009, 10:50 AM   #51
plym49
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Default Re: Jag IFS

Quote:
Originally Posted by Spyder View Post
Here's the xj6 with coil-overs on my A. The stock springs were way too stiff. By the way I liked the Jag steel wheels, they look a bit like the old artillery wheels.




Wow, really nice - that thing is going to handle like a sports car.
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Old 08-09-2009, 10:55 AM   #52
plym49
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Default Re: Jag IFS

Quote:
Originally Posted by toddc View Post
Series 1 2 and 3 are all different - but you would need to be a Jag nut like me to pick it.

It's not worth worrying about unless your'e doing a concourse resto. But then you wouldn't be on the HAMB, would you?
It's kind of like saying that all Model T's are alike. They're not, but depending on your frame of reference, they are. Same with Jag bits: the differences are minute, they all use the same maintenance parts, and as X38 said, on a rod you are probably starting with a complete donor unit to begin with.

I don't think that anyone building a rod will care about the differences, and if you start with a unit with the smaller brakes or sway bar and want to go bigger, everything bolts right up.
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Old 06-07-2010, 02:39 PM   #53
Mad welshman
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Default Re: Jag IFS

Hi there, I am new here I live in the uk and run a 51 ford F2 I have just fitted a ranger rear axle to drop the ratio from 4.8 to 3.4, ( oh so relaxed now !) I am about to put an Jag front clip on it next did you use the rubber mounts or weld it strait on to the rails ?, Many thanks in advance for any advice you can offer, Jon.
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Old 06-07-2010, 03:00 PM   #54
porknbeaner
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Default Re: Jag IFS

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Originally Posted by zman View Post
Some guy named zman did it on a Buick.
Hey wanted to say that.
now I can't even post on this thread.
Oh I guess I just did.

The Z man is who to talk to he made it happen and has the miles under his belt to prove it.
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Old 06-07-2010, 03:51 PM   #55
reefer
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Default Re: Jag IFS

I know two people who have F100`s, and both swapped in Jag front ends...looks like a factory option....the wishbones are a lot better looking than the usual pressed steel types you normally see...they are both well pleased with the results and we were happy to relieve them of the old junk brakes and steering boxes...lol.
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Old 06-07-2010, 08:03 PM   #56
55 dude
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Default Re: Jag IFS

anyone narrow a jag front end, need to lose 3" of width to use it?
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Old 06-07-2010, 10:19 PM   #57
X38
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Default Re: Jag IFS

It's been done, but you'll need to find the right width rack to go with it because apparently you can't narrow a Jag one.
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Old 06-07-2010, 10:47 PM   #58
JackdaRabbit
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Default Re: Jag IFS

Quote:
Originally Posted by 55 dude View Post
anyone narrow a jag front end, need to lose 3" of width to use it?
Not done yet but I have plans to narrow one 4" to fit under my ...ehem...`54 Jag Sedan. I'm looking to solve the rack issue by using a Cavalier rack with fabbed centerlink extension.

Along these lines:
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