Bob, what is the dimension from the inside of the hat to the inside rotor surface, it looks like it will allow using Rodney's lowering ball joints with minimal "clearancing" of the a arm... and provides a nice caliper upgrade...
Bob, what is the dimension from the inside of the hat to the inside rotor surface, it looks like it will allow using Rodney's lowering ball joints with minimal "clearancing" of the a arm... and provides a nice caliper upgrade...
Joe
Joe, it's a little difficult to measure with the wheel on, but it looks to be about 3/8" at ride height. This was the main advantage of using the Cobra rotor over the Vette.
Do you know if the LS1 dual piston front calibers increase the need of an adjustable brake proportioning valve? i.e. does it improve the brake bias or make it worse?
[This message has been edited by Fiero Vampire (edited 03-22-2017).]
Do you know if the LS1 dual piston front calibers increase the need of an adjustable brake proportioning valve? i.e. does it improve the brake bias or make it worse?
That I can't answer without doing some hard driving. My car isn't ready. You could try Dkcustom to see if his is running.
FWIW, C5 corvette *calipers* are very dimensionally similar to LS1 F body calipers. the biggest difference is in the caliper bracket. I've taken measurements off of the C5 and 4th gen bracket, and determined the C5 bracket mounting bolts are approx 0.355" further from the hub centerline than the 4th gen brackets. I'm currently working on a bracket to use the C5 caliper bracket instead of the F-body part, with RCR's permission, I'll post the finalized bracket design here, since it is a very similar design.
now the big question, why? well, the 4th gen brakes are 12", and the C5 are 13" the pads have a different curvature to match the rotors, and therefore have more pad contact area, and should yield better braking capability. is it enough to make a difference? dunno, but I like little details like this.
------------------ "I am not what you so glibly call to be a civilized man. I have broken with society for reasons which I alone am able to appreciate. I am therefore not subject to it's stupid laws, and I ask you to never allude to them in my presence again."
FWIW, C5 corvette *calipers* are very dimensionally similar to LS1 F body calipers. the biggest difference is in the caliper bracket. I've taken measurements off of the C5 and 4th gen bracket, and determined the C5 bracket mounting bolts are approx 0.355" further from the hub centerline than the 4th gen brackets. I'm currently working on a bracket to use the C5 caliper bracket instead of the F-body part, with RCR's permission, I'll post the finalized bracket design here, since it is a very similar design.
now the big question, why? well, the 4th gen brakes are 12", and the C5 are 13" the pads have a different curvature to match the rotors, and therefore have more pad contact area, and should yield better braking capability. is it enough to make a difference? dunno, but I like little details like this.
EDIT this bracket is for C5 rotors, which are about .11 smaller in diameter than the cobra rotor, the large holes will need to be mover out by approximately 0.055"for the cobra rotor, use at own risk.
the 'vette and camaro calipers have the same bore, the difference shouldn't be that noticeable. the advantage would be in the pads having greater contact area. here are the dimensions.
I'm the lower bolt holes are offset by 0.195 from the upper bolt holes. this offset is required for C5 rotors, the cobra rotor may need a 0 offset, or some other offset, YRMV.
The caliper bracket required some minor trimming to make fit the fiero, in the area inboard of the mounting bolts. the drawing in paint makes it look more severe than it is in real life. this bracket may work on the front, but I haven't tested it yet, and am not in a rush as my car is an 85.
[This message has been edited by ericjon262 (edited 06-04-2017).]
