moespeeds

So is it worth the $600? I'm track only, and am in the middle of a complete ground up rebuild, readying the car for ST2 next year. I was considering ditching the ABS altogether and going with proper racing pedals, but since Phoenix tuned my suspension in April the trail braking issues I was having with ABS on were solved. So if I'm gonna keep the ABS, should I just bite the bullet and get it? Running Wilwood SL-6 with Poly H and Coleman 2 piece up front, and stock calipers, Wilwood H and frozen rotors in the rear. Talk me into it, or out of it.

Thanks

mgarfias

What year car?

CP Thunder

see his signature......bet thats it.........grin

moespeeds

2000, but what difference does that make? Did they change the m/c in later years?

mgarfias

No, but they added dynamic brake proportioning to the 2001+ abs system. With those you don't need the adjustability of the DRM part.

I've got the SL6Rs on the front and find the brakes to not be as firm as I'd like - I'd like to increase the M/C diameter just a tad.

I wonder if DRM will/can sell the larger diameter master without the proportioning valve?

2002rich

That's interesting because when I spoke with Randy about the unit, he knew I had a 2001 Z06 with GT Brembo kit on all four corners.
At any rate, I have had it in my car for 2.5 yrs and now able to get the rear brakes to work much better. I also know some of the C6 Z06 folks are using it and like it too.

The pedal is nice and firm.

BTW - I'm not doubting your comment about 2001 up adding the dynamic proportion valve.

z06801

I have been running it, great peddle, feels alway firm, always in the same spot

moespeeds

I don't see how the dynamic proportioning would have anything to do with it, as it simply reacts to conditions? The adjustable valve will dictate the initial bias at the onset of braking.

Hi Volts Z06

If you keep the ABS you can simply find yourself a new M/C for a GMC truck application. That's basically what the DRM unit is with a rear proportioning valve added on. ABS sets your proportioning so you don't need that. The bigger piston will give you more fluid volume and therefore better pedal feel and response.

mgarfias

Any specific years or will any work?

Hi Volts Z06

I actually located this a while back but never ordered one. I will take a look again because I am going to replace mine as well. I believe its the same part as a 2002 GMC Crew Cab Dually.

mgarfias

I just looked at rock auto, the truck M/Cs appear to be 37mm bore vs the 1" (25.4mm) bore on the corvette m/c. Pics sure look like it'd fit.

Hi Volts Z06

I think the only issue COULD be clearance of the fluid reservoir with the hood. I think in that case you could retrofit the old reservoir. If you get yours done before me please let us know here how it worked out.

Screamin Z

Have one going in a C6Z with AP stuff. Might take a little while to dial in the rear bias, But Ive heard good reviews. Will try it out at Track Attack

trackboss

increasing m/c bore from 1" to 37mm without increasing the caliper piston bores will make the brake pedal extremely firm. Going up 1/16"-1/8", without changing anything else in an otherwise stock or stock replacement brake system will make for a great pedal, but beyond that I'd bet the driver may not like the feel. Especially on the street.

Hi Volts Z06

That statement seems reasonable but I thought the whole intent of this thread was to discuss upgrades to compliment a BBK on a dedicated track car- hence my suggestion.

mgarfias

Thats kind of what I was thinking.

Can anyone confirm the corvette M/C is 25.4mm? If so, does anyone make a 28-29mm replacement?

db2xpert

I have the DRM setup on my '01 Z, with 6/4 piston AP setup.
Great upgrade.

travisnd

No need to upgrade the master with your setup. Been running Wilwood SL6Rs for awhile now and stock calipers in the rear. Everything works perfectly.

RX-Ben

The mega bore size would make it more like a "real race car" where you brake on pedal pressure and not pedal movement. But the brake/gas pedals are not really situated well for that and exerting 150lbs of force on the brake pedal takes getting used to but does allow for good modulation, once you get used to dealing with those pressures. But there is less of a need for fine modulation with ABS.