toofast928

Oh no sale, rats........

Chuck Schreiber

So,

If I have this right, the rear bar is a little long and may interfere on pass side??
How much do we need to grind off to make this work?? Just the last adjustment hole it sounds like??

I'm also a little concerned about the front. I have the Carerra lll wheels (8 inch) in front (57 offset) with 235/40. Based on width and offset, will I be OK??

ROG100

Hi Andrew,
The new tires are on the way. Car just came back from the alignment shop after fitting the new suspension and swaybars.
Toe was 0.12 left and 0.14 right (degrees) so well within spec.
We are considering bending the bar.

Going back in the archives DR said the sway bars would accomodate up to 9.5" front wheels.
This was for the earlier set of bars.

Speedtoys

So...please help a n00b understand...

Are these particularly hard bars to reproduce? Whats are the variance and fitting problems about?

auzivision

Type the words ‘sway bar’ into Google. After the usual sponsored link, Wikipedia, and how stuff works, you’ll see a company called Addco. They are one if not the best in the business of making sway bars.

http://www.addco.net/

Due to some complicated angles, it has taken them several years to figure out how to reproduce these. Even though they use large heavy duty press & stamp machines, there is still a huge human factor that goes into fabricating cold formed hard stock. After losing a key individual, it took them all this time to figure out how to reproduce these. So I guess the answer is yes, they are difficult to reproduce.

There are other choices in the market using other techniques, but I don’t believe they yield the same results.

hacker-pschorr

I know this isn't going to be a popular option, but fitting steering stops for larger sway bars is an accepted practice in most other car circles.

That would be my solution. Heck, my 79 is so low I cannot go near full lock with the stock sway bar.

AO

You should be fine Chuck - except as you note the rear. Not sure how much needs to be taken off.

Well I guess that answers that one - just looking for ways to make it work.

I was amazed when we took a tour of the addeco shop. All of these bars are done by hand. No computer controls... just a worker with a set of dies, holding the bar in position and hitting the button to activate the press. Pretty amazing actually. But I'm sure this leads to some variation in the finished product.

Sounds like they're using slightly longer stock which is causing the issue. For most people, the front bar should not cause any issues. Roger is right at that limit and obviously the new sway bar is slightly wider than the stock bar.

SeanR

I've got some 3mm wheel spacers here to put on Rogs car, this 'should' give him the amount of extra space he will need. Will find out today or tomorrow if this works well.

Speedtoys

Define 'most'.

Ive never had to on maybe a dozen different cars ive owned.

hacker-pschorr

Let's see...going from memory I know Camaro, Mustang, and BMW owners that either live with the rubbing or install stops.

Friend of mine has stops on his 928 with a DEVEK sway bar, he has installed stops on other 928's with the same issue.

I texted my friend who builds C4/C5/C6 Vette's for track use (one of his customers took 4th at NASA Nationals this year). He said: "Yea they all rub, I don't like installing stops but other people do. They just know not to turn full lock"
The NASA car is one of the only few all out race cars. The rest are dual purpose DE / Street.

If the rubbing is so subtle a 3mm wheel space will fix it, I say it's a non issue. I cannot remember the last time I had to make a Y-turn with my 928

I would like to compare the stock steering angle on a 928 compared to other performance cars. I've always gotten the impression it's a very tight radius compared to others, never cared enough to look into it.

Speedtoys

Mark Anderson

On my race car I just installed 2 stock stops on each side but I did it because I'm running a 12x18 up front.

Chuck Schreiber

Mark,
I know your racecar has a totally different suspension, but do you have the stock bars (front and rear) or something else?

Jim M.

I just measured my first run DR front bar; it is exactly 44" wide at the outer edges of the front of the drop link mount point. So the current run of bars is 1" wider than the first run and that appers to be causing the problem of rubbing on the wheel at full lock.

Mark Anderson

I have on custom bars I made years ago but because my large wheels have so much backspace they will hit the chassie if I don't limit the travel.