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CCW Wheels RUB BAD with Hotchkis Suspension Setup, Options/Opinions PLEASE!

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TylerZ06

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Feb 8, 2009
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I'm nearing the completion of an 87 Grand National with a hot rod restoration shop and have ran into some problems.

Background on the car... The GN was always my dream car growing up and I wanted to have one of the nicest GNs around... basically every single component of the car is new or redone. Absolutely zero expense spared type of restoration... over 1100 hours of labor into it so far.

I ordered CCW wheels and have had them since December or so. They are the LM20 series, 18" with Nitto Invo tires. 275-35-ZR18 in back and 245-40-ZR18 in the front. The brakes in front are Willwoods. All of the body bushings and stuff were new Energy Suspension parts. Shocks are Bilsteins.

The suspension is the complete Hotchkis system that they sell. Pictures of the suspension stage are at my webpage. A few pictures of the almost completed car at their booth at Iola are here: Pictures by catiaudo - Photobucket

The shop took the car out for a test drive and it rubs when turning and going over bumps. Bad enough that it will jerk the wheel left or right depending on which wheel rubs first.

I don't want to return to stock ride height full time so I was thinking of going with an Air Ride setup from Air Ride Tech... the new system with the control pod and everything... Suspension Systems :: Vehicle Packages :: 1978-1988 Chevy Monte Carlo,El Camino,Malibu - Level 3 - RideTech.com - Air Suspension Specialist

Will this solve the rubbing issue or should I do something else? Modify the inner fenders? Etc... Thanks!
 
wilwood front brakes space the wheels out about an inch on both sides.

nothing but a front runner would fit on my car when i had those.
 
I'm not sure, this is my 3rd set of CCWs, I have them on a C6Z and a GTO. I just called Jon and said I wanted LM20's for a GN. :) I would assume that they are the same as ScotW's.
 
We need to know what your width and backspace is on the rims in order to really be able to help.
 
9" front / 4.75" Backspacing, -6mm offset.

10" rear / 4.75" Backspacing, -19mm offset.
 
TylerZ06 said:
They were from GBodyparts, I don't think they have a brand on them.
Click to expand...

Looking at those rotor hats you either need
A: more negative offset on the front rims or
B: a different front rotor set up .

Is that a stock style spindle ? Will the stock rotors go back on ?
 
Do you have more pics of the wheels?

Are they 3 piece? (i think they're one peice?) If so just have the hoop changed out for a different backspacing.

If not you'll nee to swap out the brakes. Putting air ride on it wont fix the problem, it'll just make it drivable. You'll want to nail the stance, and wont be able to with that brake and wheel combo.

I really like the LM20's on you car, im between those and the true forged chicane's.
 
i'd say you need more backspacing in the front wheels to compensate for the extra thickness of the brake rotor hat.
how much room is there at the framerail with the tires turned all the way? if you have 1/2" of clearance, you could get away with about 3/8" more backspacing. it might be as simple as getting the mounting face on the wheels machined if there is enough meat built into the wheel- but that's something you'd have to ask the wheel manufacturer about.

or you could dial in more camber and tuck the top of the tire in a little bit, but that will affect the handling and tire wear and may make it look like one of those stupid lowered japanese cars..
 
The OP has contacted me via PM and I have asked questions that have not yet been answered.

First of all, that BS is the exact same as me and mine are fine! The problem lies within the spindle, or the offset of the brake system.

These questions need to be answered to help further:

* Was John at CCW informed you were running these after market brakes and parts?

* What Spindle? Stock, modified stock, or a after market or a different make / model ??

* What is Aerospace's off-set if any?? Example- (BAER brakes push the wheel out .400 in front & .200 in the rear using a modified stock spindle.)


I will try to help the best I can but need info in order to do that.


Scot W.
 
John at CCW didn't know about the aftermarket brake setup. They've been very helpful recently and the resto shop is measuring everything Monday and we will know more. This is my 3rd set of CCWs and they are excellent to deal with.

They are 3 piece wheels.

Spindle is modified stock.

My next move is to buy a complete stock spindle and brake setup and see how far that gets us, remeasure, and then possibly have the wheels redone.

They did put the stock wheels back on and it also rubs.
 
TylerZ06 said:
John at CCW didn't know about the aftermarket brake setup. They've been very helpful recently and the resto shop is measuring everything Monday and we will know more. This is my 3rd set of CCWs and they are excellent to deal with.

They are 3 piece wheels.

Spindle is modified stock.

My next move is to buy a complete stock spindle and brake setup and see how far that gets us, remeasure, and then possibly have the wheels redone.

They did put the stock wheels back on and it also rubs.
Click to expand...
Okay now were getting somewhere, When you go to the stock spindle & brake set up you will be FINE! It's the spindle set up pushing thats causing the issues for sure.

If John from CCW knew the measurements he would have made the wheels right the first go around.... There are two ways to correct this issue-

1). Like your going to do- (Go back to stock spindles & brakes)

2). Send the wheels back to CCW with the correct measurements of the off-set and John will rebuild them...More likely for Free, He takes care of his customers pretty well....


Scot W.
 
i think that i'd keep the aftermarket brakes and rework the wheels before i went back to the craptastic stock brakes.
 
Wilwood hubs will push the wheels OUT while Aerospace hubs will pull the wheels IN. Me and a friend had our cars parked next to each other this weekend at BG and noticed the difference. We have the exact same front suspensions with the only difference being the brake hubs.
 
Bent6 said:
Wilwood hubs will push the wheels OUT while Aerospace hubs will pull the wheels IN. Me and a friend had our cars parked next to each other this weekend at BG and noticed the difference. We have the exact same front suspensions with the only difference being the brake hubs.
Click to expand...
Will,

So what your saying is that they will pull them in from the stock specs OR from the wilwood specs?

And if that's the case, They should be fine cause his wheels have the exact measurements as mine..


I will be re-doing my wheels to fit the BAER brake off-set but that is the beauty of having 3-piece wheels! ;) Simply send them back and change out the hoops and they are done!! :biggrin:


SW.
 
scot w. said:
Will,

So what your saying is that they will pull them in from the stock specs OR from the wilwood specs?
Click to expand...

Aerospace pulls them in slightly compared to a stock hub while the Wilwoods push them out slightly compared to stock.
 
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