IRS alignment setting for wide rear tires

[Sandeep]

Thanks for the pic Panel. It makes sense now. I was looking on the web and found a similar pic.



This is from the Rennwerks website where they are restoring a GT2. Look at the trailing arm mounts and see how they are adjustable for camber.

Sandeep

[Sandeep]

The more I think about this, the more it makes sense .. I want to go with a coilover / 935 style springplate rear suspension in the future, and it would be cool to lower the car AND have proper camber for WIDE rear tires.

I saw a pic of a 911 RSR buildup with 17x11 rears and in the article, they lowered the rear of the car and kept the camber in check with the camber boxes.

MAKE IT SO !

Sandeep

[Rob]

Hey Sandeep,

Let me know if you are going after this. If you get a mchineshop to make the mounts, you can have them make me a set as well

Rob.

[Panelfantastic]

Yeeesss! Welcome to the dark side!
Gotta have the steamrollers out back!

What could possibly be wrong with a contact patch like this???

[boygenius]

Will my 944 late aluminum trailing arms have enough camber adjustment for 18" X 10" rears.

Which bolts adjust camber? The eccentric bolt for the sway bar or the eccentric bolt in the spring plate.

[Sandeep]

:raiseroof

Yessss ... The dark side !



I was reading that the 911 RSR's had OK handling but it was the width of the rear tires that gave them the amazing grip in the corners .. I LOVE IT !

Sandeep

[boygenius]

LOOKS AWESOME!!!!!!!! :righton:

[paul_f]

Originally Posted by Sandeep

Thanks for the pic Panel. It makes sense now. I was looking on the web and found a similar pic.



This is from the Rennwerks website where they are restoring a GT2. Look at the trailing arm mounts and see how they are adjustable for camber.

Sandeep

How do you lock this mounting point into position though?? I have seen the clamps on IRSed buses move before - so surely it must happen hear unless the use a toothed adjuster or something??

This way is better than a rotating clamp as you won't get as severe toe changes with the change in camber.

Hey Panel can I have a copy of that picture too please

[Panelfantastic]

Sure Paul but it's not as clear as the one Sandeep posted. I'll try to post them here so everyone can see.
These were taken from Excellence magazine so all rights are theirs... If I get in trouble, I'm sayin' boygenius told me to

[boygenius]

Originally Posted by paul_f

How do you lock this mounting point into position though?? I have seen the clamps on IRSed buses move before - so surely it must happen hear unless the use a toothed adjuster or something??

This way is better than a rotating clamp as you won't get as severe toe changes with the change in camber.

Hey Panel can I have a copy of that picture too please

You could thread both the inner and the outer pieces of metal in the pivot. Next you could remove some of the threads about a 1/2 inch from the base of the adjuster bolt. You can thread the bolt through both pieces of metal but as soon as the bolt goes through the bottom bracket it will stop threading in since the threads have been removed. If you can place a nut on both the top and bottom of the lower plate you can "LOCK" them together to prvent the camber from changing. Just an idea...

[boygenius]

I found this picture right here in the forums of a camber box.

[paul_f]

Great picture boygenius, mmmm now i need to get something made up for my bus!

Paul

[boygenius]

The bracket itself is pretty easy to make. The hard part would be figuring out a good way to access the nut that replaces the threaded boss in the original mount. The porsche doesn't have frame horns in the way.

[paul_f]

My bus doesn't have them that close either!!

Paul