Sprint brake question
 

New master cylinder (1" wilwood). New lines (-3) newer calipers(wilwood) Have tried three different ones on rear. Bled master cylinder, gravity bled everything, bled calipers. Have ran four bottles of brake fluid through. Still takes three pumps to get a solid pedal and get the rear to stop. What am i missing here?

Bench bleed your master then put it back on then be sure all of your bleeers are at top when you bleed themm air raises to the top so if your bleeders not on top you wont get the air out

Thanks for the reply. I have already done that

Re: Sprint brake question
 

For the front, take the caliper off of the mount, put a spacer between the pads that is the same thickness as the rotor, try to hold the caliper above the master cylinder, then bleed both sides of that caliper.

Is the master higher or lower than any of the calipers? If it's lower, you need to bleed backwards, if it's higher, just fill the master, crack the bleeders, and sit for about 5 minutes, and it should be OK, you may have to take the front's off, and lay them down. I mounted my reservoir on the panel above the motorplate, and hosed down to the master. Where my reservoir is, it is higher than any of the calipers! Bob

Okay i will try that for front. Calipers are lower.

Besides the first few times i never get any air out of the calipers either its full fluid

If you have any doubts, hook up a squeeze bottle and a PC of hose, and push the fluid through the calipers and master to the reservoir! Bob

Wilwood master cylinders are hard to get bled. You have to make sure it returns all the way out on each pump when bleeding it and bleeding the rest of the system.

Re: Sprint brake question
 

Do you have enough travel in your pedal , some guys want to get the pedal away from the seat , it shortens the stroke to much , won't allow for enough fluid to transfer .

Been good about letting pedal travel back all the way. Lots of travel room in pedal also

Re: Sprint brake question
 

What kind of lines ? Metal ? Aluminum ? Braded ? Possibly cracked line , or fitting , everything thread taped or sealed ? Could be sucking air somewhere , especially if your still getting air ..

Aluminum hard line. Braided from frame out. Not getting any air on bleeders. Strictly fluid.

If you have a bad flare you could be getting just enough fluid to cause this on your aluminum hard line.

Changed all the bleeders. Must of been one of those suckin air. Fixed. Thanks for everyones input. Who really needs brakes anyways!!

You only need them to stop in Victory Lane!

Kinda need them to push the car off to. Really don't want to rattle the drive line, lol.

Sound like a push truck deficency

Re: Sprint brake question
 

I can remember back to Danville, Il, them boys with them souped up Jeeps, probably had as much power, as some of the cars they were pushin, forget the brake, get a grip, and hang on, they were probably in the 40 mph range in the chute, instantly! Bob

Maybe its just me, and this rarely happens at local tracks, but often at Usac events, I cringe every time they get behind our cars with a atv/utv to push off. Not enough pushin power for my liking.

Depends on the ATV & the operator. My Kawasaki Prairie 400 started Steve Kinser at Fargo just fine.