IRS question

21 posts in this topic

Posted · Report post

I am working on a project and have a quick question. I am going to fabricate a custom IRS for the rear of it. Its gonna be pretty much a 9in. ford center section but everything else will have to be fabricated. Heres a pic of what I am attempting to do. Does anyone have any suggestions. Thanks for looking.

img015.jpg

Share this post


Link to post
Share on other sites

Posted · Report post

First what type of car are you planning to build.

Second are you copying the picture or is it an example?

If it is see if you can find some more views on line. There are several companies like Heidt that make independent suspensions.

Getting started figuring out the rear end

My suggestion would be to select what you are going to use for the center section.

Also figure out what rims and tires you are going to use.

Also how wide is the body you are using.

The more things that you can figure out what you are going to use the better, then you can figure out the fimensions for the axles and other suspension pieces.

Also are you planning to do this in plastic or metal?

Are you planning to scratch build this completely or use or modify kit pieces?

The last thing would suggest is when you can start mocking up the parts you white glue( I use Alinees tack glue) to check that everything is correct.then you can take it apart assemble the subassemblies and then paint and do the final assembly.

Hope this helps.

bobthehobbyguy

Share this post


Link to post
Share on other sites

Posted · Report post

That looks almost like an XKE rearend. You might try and find an early Jag kit to see if any of the parts could be used.

Share this post


Link to post
Share on other sites

Posted · Report post

Ahhh...IRS in that sense...not in the April 15th sense.. :)

Share this post


Link to post
Share on other sites

Posted · Report post

Its in a 1959 Corvette. I have the 9in. rear to start with and I am planning on using both plastic and also turning some of the parts on my lathe. Here's a pic of what I am trying to build. A friend of mine built and owned the real car so pics aren't a problem. Thanks.

Champion_Corvette_1540x360-vi.jpg

img008-vi.jpg

Share this post


Link to post
Share on other sites

Posted · Report post

I know it won't be exact but I am trying to get it as close as possible.

Share this post


Link to post
Share on other sites

Posted · Report post

That is a Jag rearend. You might consider using a C3 or later Corvette IRS set up too. Those prototypically use a transverse leaf spring and outboard brakes.

The key is to determine the track and build within that boundary. That means you'll need to decide on body/wheel well width and wheels & tires before making the parts.

Share this post


Link to post
Share on other sites

Posted · Report post

This is actually a fully custom built 9in. rear. It is similar to the Jag but it really is a 9in.

Share this post


Link to post
Share on other sites

Posted · Report post

I'd look at some models that HAVE I.R.S and gather some info from them. Some kits that have them are:

Testors Smoothster It's now being referred to as a '37 Ford It also has some similarity in the frame in the pic.

Some issues by Revell like John Buttera's Coupe and a sedan delivery has a Jag rear.

You could start with a Ford 9 - inch rear housing,some big disc brakes and then fab the rest.

If you are that close to the car you should have no trouble getting good reference.

Share this post


Link to post
Share on other sites

Posted · Report post

There are several older Revell 1/25 street rod kits that feature this style rear end. They are based off the works of Lil John Buttera. A'26 Model A sedan/panel, '27 Model A tourer and a '33/34 chopped coupe. They can be had pretty cheaply on Ebay. I have the '33. Shoot me a PM if you're interested in a trade.

Share this post


Link to post
Share on other sites

Posted · Report post

Jantrix, Thanks but I already have one of those kits and I am using it for ideas but the IRS assembly in the kit just isn't detailed like I want. Thanks though. I have a good idea on what I am going to do. I will post some pics of what I come up with soon. Wish me luck.

Share this post


Link to post
Share on other sites

Posted · Report post

The lower control arms could be built using RB motions rod ends and some stainless hypodermic tubing. You could turn the coilovers, half shafts and uprights on the lathe. I think I have seen the M. W. 9" in resin before. Just thoughts on how I would do it.

Share this post


Link to post
Share on other sites

Posted · Report post

Thats kinda what I was thinking. On the M.W. rear. I don't think I have ever seen a resin one. I think I may research that. Thanks Jim.

Share this post


Link to post
Share on other sites

Posted · Report post

i don't believe that's a jag rear. it has 4 shocks and inboard brakes, like a jag but, thats about as close as that's getting to a jag rear. the center diff. is wrong. the lower control arms / wishbone is wrong. the rear hub carriers are wrong. it may be built in "jag rear" styling but, i'm pretty sure, it's not a jag rear.

Share this post


Link to post
Share on other sites

Posted · Report post

I know its not a jag. Like I say its completely custom built. It started out as a 9in. I have pics of the car from many angles but I just was sure where to start. I was just asking for suggestions. Thanks for looking.

Share this post


Link to post
Share on other sites

Posted · Report post

i was letting scale master know it was not a jag rear. he stated that it was.

Share this post


Link to post
Share on other sites

Posted · Report post

Oh sorry about that Dave. I was confused. LOL. Can't wait to see more of your build. Maybe one day I will be able to build to your level.

Share this post


Link to post
Share on other sites

Posted · Report post

kris, no problem. i'm afraid shooting for my skill level may not be to much of a goal. i'm really not that good. i'm really accurate but, (in my book) not a really good model builder. my abilities with actual modeling are somewhat limited.

Share this post


Link to post
Share on other sites

Posted · Report post

You're way too humble Dave...your stuff is top drawer, you're also correct about that rear not being a Jag, it's somewhat similar in overall appearance, I guess - but looks mostly aftermarket or whiz kid billet to me.

Share this post


Link to post
Share on other sites

Posted · Report post

Cowabunga - I want to see this build.

Share this post


Link to post
Share on other sites

Posted · Report post

Whoa there Jim. LOL. I have a few things to work out b4 I get to deep into the build. Thanks for the enthusiasm though.

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!


Register a new account

Sign in

Already have an account? Sign in here.


Sign In Now