hey guys just converted over to s10 wheel cylinders and I still loose traction at about 1800 rpm when powerbraking, I applied the emergency brake and powerbraked I was able to build 10lbs of boost @3000 rpm, what are you guys using to give you that clamping force that you need oh yeah I have hydroboost brakes
How Much Boost Can You Hold
- Thread starter V6cious
- Start date
Welcome!
By registering with us, you'll be able to discuss, share and private message with other members of our community.
Turbo Indian
worlds quickest 6cyl bird
- Joined
- Sep 25, 2003
- Messages
- 3,493
20 psi off the trans brake! :biggrin: sorry I couldn't resist. seriously off the foot brake each car is different, I use 2 sets of elcheapo bonded (not riveted) shoes you can get these @ auto zone. use the 2 long shoes,with s-10 wheel cyl. & I was able to leave with about 11 psi. if you are still turning the tires also make sure the rear brakes are blead real well.
Using stock replacement rear shoes and stock original wheel cylinders I can hold between 12# & 14# with Hoosier QTPs on a prepped track. I use a line-lock for burnouts and my brakes are well bled. I do think tire type and track prep factor in (if only just a few pounds) how much boost I can hold with the brakes.
Turbo Indian
worlds quickest 6cyl bird
- Joined
- Sep 25, 2003
- Messages
- 3,493
don't act like a girl
if your blowing the tires away with cheap shoes & s-10 cyl. I would have to 1 of 2 things, #1 your breaks are not bleed real well, (I have heard tell by some that all you have to do to bleed the system is pump the brakes with the key off then turn the key on, that's BS) or # 2 your not holding the brakes hard enough, you can't act like a girl when holding the brakes. you need to give them 2-3 pumps then try to push the pedal through the floor!
if your blowing the tires away with cheap shoes & s-10 cyl. I would have to 1 of 2 things, #1 your breaks are not bleed real well, (I have heard tell by some that all you have to do to bleed the system is pump the brakes with the key off then turn the key on, that's BS) or # 2 your not holding the brakes hard enough, you can't act like a girl when holding the brakes. you need to give them 2-3 pumps then try to push the pedal through the floor!
I can hold up to about 17#, but by the time I get there the light is already green 
I use a proportioning valve bypass so all the brake pressure goes to the rear wheels when I mash a button. Also have s10 cylinders and complete set of the softest organic long shoe pads.
Also remove the drums and rough them up with 60 grit sand paper.
I use a proportioning valve bypass so all the brake pressure goes to the rear wheels when I mash a button. Also have s10 cylinders and complete set of the softest organic long shoe pads.Also remove the drums and rough them up with 60 grit sand paper.
I agree. I can hold 16 at the track.XLR8 said:
Front tires do make a difference at holding boost. In the driveway I can only hold 13 but at the track I can hold more b/c the front tires don't push as easy with the sticky track surface.
ks
stock replacement cylinders and the soft compound long shoes from Postons I can easily hold 15psi, and reach it pretty quick (PT61 & 3200 9x11), BUT...I can't really drive it on the street like that because barely touching the brakes will cause the rears to lock up! The stock shoes will hold 5psi and with our track that's about the max to launch on, any more than that and it just spins the tires after I let off the brakes...
another question I noticed that the little deal that all four brake lines run into is unplugged( located under vehicle on frame) would that have something to do with poor locking force, I have a 3000 stall but I can never take full advantage of it if I can't stall up to it there has to be a solid proven remedy for this I think that the bleeding of the brake system could be some of the problem
