Author Topic: C3 diff/axles  (Read 6958 times)

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Offline Bfit

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Re: C3 diff/axles
« Reply #12 on: October 13, 2015, 12:46:40 PM »
Just a note: I made an error in working this out. Actually ~1/2 degree change in camber for my 1.5mm side yoke movement. Not good! Particularly if your strut rod bushings look like this as well...:


turf them and get a set of adjustable rod from Vansteel or one of the reputable suppliers
bfit
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Offline Bfit

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Re: C3 diff/axles
« Reply #13 on: October 13, 2015, 12:48:41 PM »
Has anyone dealt with difftrans in Newcastle? Guy sounded very knowledgable on the phone and said he'd done a couple of these centres before. I'm dropping it off to him today.

For interest sake. Check out the wear on the end of the left side yoke:



Above photo is with the yokes pulled out, below is with them pushed in, you can see the clearance between circlip and plate. Sorry about the blurry picture.


looking at the photos you have a problem developing.
you can see what looks like damage in the root of one of those side gears.
bfit
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Offline metalhead

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Re: C3 diff/axles
« Reply #14 on: October 13, 2015, 02:37:19 PM »
turf them and get a set of adjustable rod from Vansteel or one of the reputable suppliers
bfit

I've been seriously considering it. At this point though, I'm hurting a bit on all the parts, I have new poly bushes (bought a full car kit), and they're easily replaced later on. So I think I'll try the poly bushes, and maybe make some adjustable  rods with heim ends a bit later.

Do you have any thoughts on the advantages or disadvantages of mounting the inboard end of the strut rods a little lower to decrease the camber gain in compression? Obviously it's better for launches, but normally camber gain is a good thing for handling? I was considering a spacer to mount them ~0.5" lower, but found conflicting information as to whether it would be beneficial or not.

Offline Bfit

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Re: C3 diff/axles
« Reply #15 on: October 13, 2015, 03:06:45 PM »
I've been seriously considering it. At this point though, I'm hurting a bit on all the parts, I have new poly bushes (bought a full car kit), and they're easily replaced later on. So I think I'll try the poly bushes, and maybe make some adjustable  rods with heim ends a bit later.

Do you have any thoughts on the advantages or disadvantages of mounting the inboard end of the strut rods a little lower to decrease the camber gain in compression? Obviously it's better for launches, but normally camber gain is a good thing for handling? I was considering a spacer to mount them ~0.5" lower, but found conflicting information as to whether it would be beneficial or not.
most of the aftermarket kit lower the inner point 1/2"
its not hard that make your own bracket, also  the OEM and aftermarket brackets are far to light and have been know to crack.


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Offline Scott

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Re: C3 diff/axles
« Reply #16 on: October 14, 2015, 08:40:01 AM »
If you are ordering new strut bushes, measure the ID of the arm first.  There are two different sizes, depending on the year.  Mine had been swapped for the later year ones.

Edit: Whoops, there's a second page.  If the bushes you have don't fit, this is why.

Offline metalhead

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Re: C3 diff/axles
« Reply #17 on: October 14, 2015, 09:13:23 AM »
Thanks Scott, I bought the complete car Energy Suspension poly kit from Summit, and fortunately it came with both bush sizes. If anyone needs the smaller size I'd be happy to give them away! Although actually that might not be a very useful offer, as it only came with a single set of the sleeves and washers. Not sure if the sleeves and washers from the original bushes are the same?

Offline billet351

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Re: C3 diff/axles
« Reply #18 on: October 18, 2015, 09:32:50 AM »
My 79 side yokes were that worn, one circlip was gone and the other had less than a circlip thickness before it too was gone, that 135 thou. Yokes had ground into housing, requiring a replacement as there was no meat left for the seal to sit

Offline metalhead

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Re: C3 diff/axles
« Reply #19 on: November 02, 2015, 11:51:42 PM »
Yes I run this set up in one of my cars .
And yes the basics are the same  as the original,

The trailing arm is manufactured along the lines of a Webster truss
Deflection in the trailing arm is minimal.
The advantage is in the coil over  being fitted at the optimal angle .
I'll have  something to compare against after the leadfoot Next month.
I'll let you know
 Bfit

So, new pb according to the other thread! What do you think of the Ridetech setup? If you don't mind me asking, what sort of times are you running, and what modifications are made to the car?

Cheers,

Andrew.

Offline Bfit

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Re: C3 diff/axles
« Reply #20 on: November 03, 2015, 10:23:49 AM »
Andrew
The Ridetech  rear end setup is the main difference in the car from that last outing  at Winton.

The difference 12 second . the rear of the car is now predictable . I cant say the same for the front suspension.

The front is lowered to the legal limit, which causes the front suspension to be in the upper limits of it travel and that causes a problem with bump steer. This is fine for day to daily travel, but when changing from hard acceleration to hard braking  when traveling quickly ( Very quickly ) is a challenge  to control.
So at the moment its back of on the fuel settle the car and slow on the brakes.
Bfit
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Offline metalhead

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Re: C3 diff/axles
« Reply #21 on: November 03, 2015, 11:52:47 AM »
12 seconds!  That's astonishing! Well done, I'll bet you're chuffed about that.