I just dropped in to see what condition, my condition was in...
Hey that is a lot of work.  Looks strong as too.  As you have time update the pics.  I'm getting back to my front suspension.  But still have to finish the rear - slicks are too wide so will build a pushrod coil over.  Will post as I make progress.

DAZE - thanks for keeping the site open!  It is the best single source on the interweb for IRS.

Cheers - Jim
 

  Hah- ha - that is funny!  If you poke around here - you'll find my "Jim's Giovanni" - it has the Currie johnny joints mod in the TAs.

Cheers - Jim

 

Looks like you've hit the"magic" 3 on your posts - should be able to load pics now.  Looking forward to seeing them. 

Here's the "How-2"
http://irsforum.boardhost.com/viewtopic.php?id=3

Cheers - Jim

Great solution - looks like some nice "kit" potential. 

Cheers - Jim

Looks like its coming together - Careful with that wrist!  You Know "Murphy!."

Cheers - Jim

rficalora wrote:

I'm thinking learning geometry & the formulas is beyond me so I'm wondering whether there are services that:
a) given various measurements, will provide back the info about camber (& toe if any) changes throughout the suspension travel
b) make recommendations for what to change to improve the IRS

I'm asking because I have an IRS that someone else made (I got no specs on it) & I had to modify to make it fit my car so changed it anyway.  Net, I have no idea what it's doing and want to because I want to change a few more things.  I'm thinking 1st step is figure out what it's doing currently & then make my modifications incorporating recommended changes from the analysis.
 

Yes - It is called a "String Computer."  It was developed by Allan Staniforth.  There are freeby computer approaches - see my thread elsewhere.  This one is online - free just need to sign up for it;
https://www.racingaspirations.com/
Pics are always good!
Cheers - Jim

Nick_P wrote:

Interesting site but wow, so little activity.  Anyone here like the new IRS from AME

Welcome - and get that second post in so you can add pics!  I personally am in and out on an infrequent basis.  Will restaert my Corvett project next season.  This year I get/have to move my sailboat from South East Asia to South Africa  - so have been busy with getting that all ready.

Ask away any questions you might have - but be patient - I think many members are otherwise "engaged," like me and drop in from time-to-time. 

Cheers - Jim
 

Greetings - welcome aboard!  That is a cool looking project.  Level is a good place to be starting for the 1/2 shafts at ride height.  Be sure and check out some of the links I've posted that will help do the diagram/planning for you. 
There is no specific discussion on pinion angle as I recall - but there is a good bit of discussion on drive shafts and angle.

Looks cool - very cool.  Are you on Lateral-G or Pro-Touring too?  Might be some interest there in your ride too.

Cheers - Jim

A while back I posted a thread that was on the "bits and Pieces" - or something like that.  There are a number of hex tube and swedged tube manufacturers that might be enough for your MOD.  The dirt track and circle track folks use a lot of that and really put it to the test.

Here is that link:
http://irsforum.boardhost.com/viewtopic.php?id=260

The total project is here:
http://vettemod.com/forum/showthread.php?t=10667
I started with some rightous - I mean LARGE DOM and threaded it rather than do the weld in bungs.  MAN what weight.  I've since gone to oversize AL hex Tubes. Haven't run it yet.

RE:  Halfshafts.  will you have enough end-play to accomodate any  suspension movement (in and out)? 
I had some slip shafts built for my Corvette project - much doccumented here - and on Vettemod.com   Have since gone to CV axles - less weight and rotational mass.
Here's the 'vette link :
http://irsforum.boardhost.com/viewtopic.php?id=490



Cheers - Jim

Hey Jim - Long time no hear.  Hope you've been well.
Just saying HI!  A lot for me to post and catch up on.

Cheers - Jim

MRGJNV wrote:

Another question I have is the angle of the dog bones. I see that the top link is supposed to be 6.2 degrees up. Since the CG is going to be higher than that of the Vette, I was thinking of installing them at about 10-12 degrees. The attachment to the frame would be much cleaner looking raised up a bit.

One thing you'll be "messing with there" is the Anti-Squat.  Could give you some characteristics you may not like - or maybe not.  Would bneed some analysis.
http://www.vettemod.com/forum/showthread.php?t=327

Cheers - Jim

There are a fair number of users over at vettemod.com that have used C4 control arms and rear "batwings" on their C3 Corvettes.  You might take a look over there and see if you have any "joy".  BTW if you become a member there you can use the downloads and there are some C4 suspensiion CAD files available.

Good Luck.
Cheers - Jim

Over the past few years there has been a minor movement to DIY/CNC manufacturing of Alumiinum Billet Uprights.  The nice part about some of the designs, they can be modular and assebled rather than welded saving on fabrication, and easing manufacturing complexity.  This is a set built by a fellow who is building a Formula 1000.  Ok it weighs between 1000-1400 pounds wet, but the DIY work was done without a CNC as I understand.

Cheers - Jim

Firebird - welcome aboard!
Sorry I can't answer the jag questions -- but theis is the right place. 
However, I'll jump in as a Vette-Mod Maniac... No mines here Richard!!!

I built a Giovanni-like Set Up - you can find it here on the site (url follows), google, or over @ vettemod.com - I use the  same handle there, phantomjock.

The Govanni is a HUGE improvement over the standard C3 IRS.  Yes, the C3 is an IRS, but the trailing arm suspension has its own set of quirks that leaves a lot of room for improvement.  Having owned my C3 for over 35 years, autocrossed and autobahned, I became well familiar with its quirks. And, I'm sure the jag IRS would be an improvement - but not without some manufacturing/mod efforts.   

You can see the difference on the curves on my build thread @ http://irsforum.boardhost.com/viewtopic.php?id=490   Similarily, the road test report I've posted there attests to the much improved handling and streetability for this approach.

My Giovanni set up uses a dual mount composite transverse leaf, and the bushings in the TAs have been replaced with sphericals, so the motion is smoother and much improved.  Parking brake is moved to the top of the TAs. 
Two aluminum plates lower the lower cross member for better geometry on the lower control arm. 

The setup includes 2 safety loops as well, all (or most) of the necessary small bits and pieces for the upper and lower control arms.  I had all the welding done to the rear differential crossmember and it is part of the package too.  The diff crossmember mounts with aluminum pucks instead of rubber/poly discs so much improved road contact as well. 
The spindles were rebuilt all new bearings by VanSteel, and they powdercoated the TAs as well. There is always a concern regarding the in/out motion of the half shafts and wear and tear on the differential.  I opted for slip shafts that were built by Chris Taton who

Sorry, I'm a little to join the party, but Ralphy has a wealth of information available - and terrylracing has a lot of experience to offer as well as many others here.  For all things IRS - this is the place!

I have been working with the C5/6 uprights in my suspension design for my track/race car for the past few years.  Maybe I can offer a point or 2 you might find useful.
1. The geometry of the pick up points on the frame from C5 to C6 are the same, the uprights and control arms as well (As I all my research has found.)
2.  Also, they are the same from base C6 to C6Z06. We'll have to assume that for the ZR1.  Have you a source for those?  May be just different materials - not design.  I understand that is the difference with the stock vs Z06.
3.  Suspension Analyzer V2.4 has a 2001 vette file in its library (C5). Because the position of the pick up points is the same, you can use that information to locate the control arm pivot points and balljoints if that fits your need.
4.  When you start your build, unfortunately, you'll need to do some work on the uprights to get them to be useful - GM didn't make the Ball Joints replaceable - that is why you see them on eBay. There are approaches you can use, I've posted mine here on this site, as well as vettemod.  I post there as phantomjock. 
I have some dimensions - somewhere - I'll look.

Cheers - Jim