Guys with Killer Brakes, what about Rears & Bias????

[USAZR1]

Originally Posted by alnukem

I bought a car & there was a line with a description that said

"C5 Z06 Wildwood Front Brakes w/Guido Movit Master Cylinder Bias Spring"

what/who is Guido movit?

Guido Frensemeyer,owner of Movit-DE
http://www.movitbrakes.com/en/produkte/

[WVZR-1]

Originally Posted by batchman

The benefit of an F-body master is the 1" piston (vs 7/8" factory all c4). The thing that has stopped me from doing this is just as you mention, rear bias. My car suffers from understeer under braking and I'd rather continue with soft brakes than make that worse.

I have been unable to take the time to figure out how to put in the bias spring to see if helps or hurts.

Of course it took me until this year to realize I'd upgraded the front pads but not the backs - I'll be trying that update as soon as I figure out how to bed new pad types on a non-street car...

Later,
- Jeff

In '92 there were some changes made. The master has a larger bore 23.7mm vs 22.2mm for earlier. The pedal ratio also changed from 3.5 to 4.0 so you could do the math and see if competitively the change to the later master or 4.0 ratio would help in your particular case. The stroke in the rear of the master also changed but I'm not familiar with the effect that that might have.

Now the booster changed as well in '92 along with the push rod so I don't know what might be required to accomplish the pedal ratio improvement. I know that you would need the '92 pedal and the support bolted to the firewall that the pedals swing on. The booster push rod is different also and I don't know that it could be used with the earlier booster.

A 4.0 ratio and the 1" F-body master?

[XfireZ51]

Originally Posted by WVZR-1

In '92 there were some changes made. The master has a larger bore 23.7mm vs 22.2mm for earlier. The pedal ratio also changed from 3.5 to 4.0 so you could do the math and see if competitively the change to the later master or 4.0 ratio would help in your particular case. The stroke in the rear of the master also changed but I'm not familiar with the effect that that might have.

Now the booster changed as well in '92 along with the push rod so I don't know what might be required to accomplish the pedal ratio improvement. I know that you would need the '92 pedal and the support bolted to the firewall that the pedals swing on. The booster push rod is different also and I don't know that it could be used with the earlier booster.

A 4.0 ratio and the 1" F-body master?

Dave,

That's very interesting. This would appear to explain why I have not found a need to change my master while having installed the Z06 brakes front and rear.

[alnukem]

Originally Posted by USAZR1

Guido Frensemeyer,owner of Movit-DE
http://www.movitbrakes.com/en/produkte/

Thanks for the Translation....looks like good stuff!

[edram454]

My car came with the grand sport brakes and a brake bias spring. Previous owner put hawk track pads on this car and it stops on a dime with no fade. I get lots of dust and squeals but it does stop very good.

ed ramos #3028

[batchman]

Originally Posted by FU

The bias spring will calm down the understeer when braking.

Originally Posted by WVZR-1

In '92 there were some changes made.

Cool news, thanks to you both. In my racing class brakes and master are open, and update/backdate is up for grabs so any C4 part is legal.

If I'm lucky the bias spring with more aggressive pads will give me enough rear brake to add a bias adjuster, which really is a rear brake limiter. My problem with the understeer comes from not enough rear brake. If that works then I could perhaps get the higher ratio pedal and/or bigger piston master, but I thought there was something funny about the brake warning light on the later (1 reservoir, right?) master.

I sense a mix/match attempt coming this off-season .

Thanks again,
- Jeff

[WVZR-1]

I'd be inclined to try the 4:1 pedal and pedal support and see if I could maybe construct the push-rod to booster so I could keep everything I had. The master cylinder bore change was 1/16" or thereabouts and if the 4:1 showed promise then consider the change to the later master. There's ASR to contend with so it would require substantial thought maybe. Then again maybe not.

I was with a friend at Carlisle who was shopping pretty hard for one of his customers cars and I looked harder than I normally do to see what was laying around and I saw nothing. The problem I anticipated having even if I saw one that was supposed to be later I had nothing to measure and compare to.

I'd think I'd try a buy from one of the salvage guys and request the support and pedal from a known '92+ and see if the booster push rod could be included with the sale.

Demps said he was parting a '91 and he thought he had them so he could take dimensions from his to compare to what you need/want.