Dual caliper rear brakes

201250 · 01-10-2013, 01:43 PM

Thanks Ed ................good input. My experience has been in SS so leave off the tranny brake and let her eat. Now with getting back into stock eliminator need to learn new ways of staging/leaving.

TC

Ed Wright · 01-10-2013, 01:57 PM

Quote:

Originally Posted by 201250

Thanks Ed ................good input. My experience has been in SS so leave off the tranny brake and let her eat. Now with getting back into stock eliminator need to learn new ways of staging/leaving.

TC

I let FJ Smith to the brain work for me. :-)
Just bought his master cylinder kit and firewall brace for my model car, and followed the enclosed instructions for re-drilling my pedal.

Sean Marconette · 01-10-2013, 01:58 PM

Maybe I am missing something, but if you are using a LL it is only active for the front brakes and staging the car. What would it matter if you had 8 rear caliper brakes on the rear? Just a curious 3 pedal racer.

Sean

Wade_Owens · 01-10-2013, 02:45 PM

Quote:

Originally Posted by Sean Marconette

Maybe I am missing something, but if you are using a LL it is only active for the front brakes and staging the car. What would it matter if you had 8 rear caliper brakes on the rear? Just a curious 3 pedal racer.

Sean

Sean, you can stack the brake pressure by pumping the brake pedal, holding the line loc, and repumping the pedal, then releasing the button before rolling all the way in. Problem is, it still only gives the front more pressure and that's not generally where its needed. I can slide the front tires by doing this because I dont have enough rear pressure. After you get it all figured out, you can stall the right converter VERY high with the std 2 front, 2 rear setup. Believe me, I chased it for awhile.......

Wade

Ian Hill · 01-10-2013, 04:27 PM

whoooooaaa! i get it. forget i said anything.

i thought the new craze of 6 and 8 piston calipers where for down the top end.....but not so much it seems. i want to try this now, damn snow....i can bring the rpm up to 4800 now, should able to hit mid 5k with more brake. i still only launch at 3400 during the bracket race, but qualifying would be more fun!
Ian

Jeff Lee · 01-10-2013, 05:53 PM

Wade,
I sent you a PM
Thanks

Sean Marconette · 01-10-2013, 07:23 PM

Quote:

Originally Posted by Wade_Owens

Sean, you can stack the brake pressure by pumping the brake pedal, holding the line loc, and repumping the pedal, then releasing the button before rolling all the way in. Problem is, it still only gives the front more pressure and that's not generally where its needed. I can slide the front tires by doing this because I dont have enough rear pressure. After you get it all figured out, you can stall the right converter VERY high with the std 2 front, 2 rear setup. Believe me, I chased it for awhile.......

Wade

I figured it had to be the auto cars, as with a stick all you need is enough front brake pressure to not roll, the less the better. Thanks for the explanation.

Sean

Bill Bogues · 01-10-2013, 09:07 PM

Several years back I put aerospace disc brakes on our Nova. I went with dual calipers on the back for more holding power when staging. It was the best thing I ever did. The car went from really having to push the brake pedal hard to stage at 3000 to where with just a little pressure on the pedal I can take It up as high as I dare without it trying to creep at all. The only problem I then had was that the master cylinder didn't have enough volume to have a good pedal on the first pump.I fixed most of the problem by going to a big bore (11/8) master cylinder.It then had good brakes on the first pump but It was still about 3/4 of the way down. ( Not good for finish line braking) I finally put a 2lb residual valve in the brake line going to the back brakes and now I have a pedal nice and high. The back discs don't seem to have any more drag than they had before. Hope this might help someone. Bill

201250 · 01-11-2013, 08:58 AM

Bill THANKS for sharing that info!!!!!!!!

TC

Rob Petrie E395 · 01-11-2013, 01:43 PM

How are you guys plumbing your brakes? If you look at the Aerospace brakes instructions for plumbing dual rear calipers. It looks like they are saying to hook the front and rear ports together with a tee's. Are you guys doing it this way? I am sure it works but what happens if a line breaks. Seems like you would have no brakes instead of weak brakes.

http://aerospacecomponents.com/image...ons/dualpl.pdf

01-10-2013, 01:43 PM	#1
201250 Junior Member Join Date: Nov 2010 Location: Florida Posts: 53 Likes: 0 Liked 0 Times in 0 Posts	Re: Dual caliper rear brakes Thanks Ed ................good input. My experience has been in SS so leave off the tranny brake and let her eat. Now with getting back into stock eliminator need to learn new ways of staging/leaving. TC

01-10-2013, 01:58 PM	#3
Sean Marconette Senior Member Join Date: Mar 2006 Posts: 977 Likes: 797 Liked 275 Times in 76 Posts	Re: Dual caliper rear brakes Maybe I am missing something, but if you are using a LL it is only active for the front brakes and staging the car. What would it matter if you had 8 rear caliper brakes on the rear? Just a curious 3 pedal racer. Sean __________________ Sean Marconette 84 Mustang 5060 SS/N

01-10-2013, 04:27 PM	#5
Ian Hill Member Join Date: Sep 2008 Posts: 216 Likes: 0 Liked 6 Times in 3 Posts	Re: Dual caliper rear brakes whoooooaaa! i get it. forget i said anything. i thought the new craze of 6 and 8 piston calipers where for down the top end.....but not so much it seems. i want to try this now, damn snow....i can bring the rpm up to 4800 now, should able to hit mid 5k with more brake. i still only launch at 3400 during the bracket race, but qualifying would be more fun! Ian __________________ They say money can't buy happiness, it can buy race car parts, and that makes me happy Ian Hill GT/FA 1982 Camaro, F/CM 1968 Camaro Last edited by Ian Hill; 01-10-2013 at 04:36 PM. Reason: didnt get it...but now i get it! LOLOLOL

01-10-2013, 05:53 PM	#6
Jeff Lee VIP Member Join Date: Jul 2007 Location: Anthem, Arizona Posts: 2,766 Likes: 0 Liked 3 Times in 3 Posts	Re: Dual caliper rear brakes Wade, I sent you a PM Thanks __________________ Jeff Lee 7494 D/S '70 AMX

01-10-2013, 09:07 PM	#8
Bill Bogues Member Join Date: Apr 2005 Location: Bethany La. Posts: 323 Likes: 96 Liked 169 Times in 53 Posts	Re: Dual caliper rear brakes Several years back I put aerospace disc brakes on our Nova. I went with dual calipers on the back for more holding power when staging. It was the best thing I ever did. The car went from really having to push the brake pedal hard to stage at 3000 to where with just a little pressure on the pedal I can take It up as high as I dare without it trying to creep at all. The only problem I then had was that the master cylinder didn't have enough volume to have a good pedal on the first pump.I fixed most of the problem by going to a big bore (11/8) master cylinder.It then had good brakes on the first pump but It was still about 3/4 of the way down. ( Not good for finish line braking) I finally put a 2lb residual valve in the brake line going to the back brakes and now I have a pedal nice and high. The back discs don't seem to have any more drag than they had before. Hope this might help someone. Bill __________________ Bill Bogues 4696 STK

01-11-2013, 08:58 AM	#9
201250 Junior Member Join Date: Nov 2010 Location: Florida Posts: 53 Likes: 0 Liked 0 Times in 0 Posts	Re: Dual caliper rear brakes Bill THANKS for sharing that info!!!!!!!! TC

01-11-2013, 01:43 PM	#10
Rob Petrie E395 VIP Member Join Date: Dec 2007 Location: Woodlawn IL Posts: 1,092 Likes: 162 Liked 216 Times in 77 Posts	Re: Dual caliper rear brakes How are you guys plumbing your brakes? If you look at the Aerospace brakes instructions for plumbing dual rear calipers. It looks like they are saying to hook the front and rear ports together with a tee's. Are you guys doing it this way? I am sure it works but what happens if a line breaks. Seems like you would have no brakes instead of weak brakes. http://aerospacecomponents.com/image...ons/dualpl.pdf