thoughts on rear discs

[GoodysGotaCuda]

Now if I would want to go for the viper calipers with the 11.75 rotors up front would that work with manual brakes?

Matt

Contact

http://www.arengineering.com/

[MoparMatt383]

I emailed AR and this was their response.

"The Viper calipers work fine with manual brakes, in fact that is how we recommend that you run them.  You need to run the late A body drum knuckles.

Rick Ehrenberg at Mopar Action has used the Viper 11.75 kit on a couple of cars.  You might email him or check out the tech archives at Mopar Action for more info."

Matt

[Ornamental]

...Wilwood isnt very recommended for lots of street, it doesnt take conditions well from what i understand...

Can you elaborate on this?

[IMNCARN82]

This thread has helped alot.  Thanx all!!   I need help with my brakes too. As a result of all my looking I've decided to go with the viper caliper/11.75 rotors.First to see the results before going on to the drums. Thanks goodysgotacuda. The roads here are very curvy,ricers everywhere.  i'm thinkn just clean up the drums,new lines,adjustable valve?  and put some coin into. suspension too.

[Chryco Psycho]

Wilwood have differnet ratings for their brakes some are very light duty , thin rotors & light duty calipers etc
 make sure you get the correct stuff   

[Ornamental]

Wilwood have differnet ratings for their brakes some are very light duty , thin rotors & light duty calipers etc
 make sure you get the correct stuff   

I see. Thanks for the explanation.

Guess that this one should be ok then.
https://www.reillymotorsports.com/store/product.php?productid=16152

Judging from what i read happy customers write about Alterktion and Bill Reilly, i doubt that he would use crap brake kits. Of course, i could always buy any other brake kit for Mustang II spindles, but i really don't see a need to do that unless there's substantionally better deals to be made with other makes.

[GMachineDartGT]

Rear discs willpay off. Since discs are much easier to modulate, the rears will not lock up like drums in a panic stop. Just keeping the rears unlocked, will shorten stopping times dramatically. As far as assit goes, I have never seen a vacuum can do anything. If it worked, the factory would use them. Right now it seems the only 2 good alternatives are an electric pump (I use an old GM style, very fast and quiet) or a hydroboost setup. Both of these mimic factory configurations.

[heminut]

As far as assit goes, I have never seen a vacuum can do anything. If it worked, the factory would use them. Right now it seems the only 2 good alternatives are an electric pump (I use an old GM style, very fast and quiet) or a hydroboost setup. Both of these mimic factory configurations.

I had a built 340 with the 484/284 purple shaft cam in a 70 Cuda years ago. When I first put the car together the power brakes were scary due to the lack of vacuum. I pulled a vacuum canister off of a big car that had hideaway headlights (don't remember what car it was) and put it on the Cuda. Made a heck of a difference, I never had a problem with having enough vacuum for the brakes after that.

[c_u_d_a]

Why do the Viper calipers work so well with the smaller rotors?

The latest Viper calipers have 40mm and 44mm pistons, while the Mopar single piston calipers have a 2.75" piston and the Bendix (66-69) four piston calipers have 2" pistons.  For a given line pressure, the single piston caliper will have 38% greater force on the pads and the Bendix caliper will have 46% greater force on the pads than the Viper calipers.