Some brake questions for the experts...

[Dan Sherwood]

I have a 67 camaro with a bbc that weighs in at 3700 lbs+ with driver. I've got wilwood 13" 4 piston discs on front and big 11" drums on back. The car stops darn good for street use (as in right now) but it has a tendency on long road courses to fade before the 20 minute session is up, and use pads like holy cow.
It's a drop spindle setup, and I'm considering a larger rotor and 6 piston upgrade that will work better with less fade and fit with the 17 inch wheels up front, and if there is a good wilwood disc setup for the rear that will still allow me to run my 15" drag wheels? I am loking for a SUBSTANTIAL improvement in braking, so if it would just be a marginal improvement, I'll just make do. I already have a proportioning valve on my current setup.
I'm looking to be able to run much deeper in the corners for the whole session with this heavier car. Ideas????????

[homerneedspeed]

What pads are you running right now?

[chicane67]

4 pot Superlites are WAY too light for that chassis weight. Dont even tell me that they are Dynalites..... the Dynalites are about a 10 factor in being way too small for anything on a street chassis.

Drop spindles of more than about 7/8 to 1.0" are going to give you major problems with fitment. It will place the caliper too close to the UCA when in a turn and under load.

[Dan Sherwood]

Actually I believe they are dynalites, but they have been on the car now for 10 months and fitment has not been an issue. If the car were mostly street and occasionaly at the track as the 69 is, they would be fine, but I too believe they are way inadequate for the weight, power and speed this car is capable of.

So now that we've established they are inadequate (which I basically stated in the opening post) what other 6 piston units are going to work on this car? As far as pads, they are an aggresive track pad that works very well when they get some heat in them.

Looking for suggestions, not bashing, thx.

[68firehawk]

If you want to go with a rear disc brake setup for mild road race/street use you will be limited with your choises considering you want to be able to use your 15" drag wheels. Most Big aftermarket brakes take at least a 17" rim to fit the monster calipers.

I would check with the guys over at Precision Brake. They were a big help when I had my rear system engineered. They say they can make a system to fit any vehicle. I believe Victor is the current rep who is responsible for keeping tabs on the guys that come from this forum.

Do you have vented/slotted rotors? Heat may also be a factor with your current fade issues. As far as pads being eaten up. Race pads are much softer so they grip better. Thus they get eaten up much faster and if they are undersized it gets even worse.

If I were you I would sell my drag rims put the money on some 6 pistons with vented sloted 13" calipers for the front and order up a system for the rear that I could use my Dynalights on.

You can find the contact info for Precision Brake on this website.

Jake

[Dan Sherwood]

Got a reply from precision brakes. It appears they could make an 11 inch setup for the rear that would let me use my 15 inch drag wheels for those. The front would not be an issue using a 13 inch setup, as the front drag skinny wheels don't interfere with the calipers (at least not the current 12.9 dynalite setup).

Some 6 piston 13 inch up front with the 11 inch setup out back would probably help a bunch at 150+ mph in this heavy car. Thx!