i have no power brakes almost at low rpm.s. they are fine at cruising speeds/higher rpm.s, but when Im at the track and trying to brake torque the car, I have a firm pedal and not much assist. I was thinking I would get a vacuum pump from www.MPbrakes.com but not for $389!! Im just curious if they work for people or what. think it would work since I do have power at higher rpms and do make 12"s at idle. any thoughtsor comments would be appreciated. thanks chris

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1986 Iroc Z
355, cleaned up trick flow twisted wedge G1 heads, 750 holley, 700r4, 10:1 compr., forged flat tops, solidcam .501I .510E, 4gen rear w/3:73 posi, girdle, and disc's, Edel. torker II, shift kit, 2500 stal, hedmann LT. headers, 4 gen seats, man. strg., lt1 starter, alum. w/p, msd 6al, coil, dist., mallory wires.
12.86 @109mph so far(still need fine tuning)

1995 z28,SS Hood, Iroc style spoiler, tints and black outs, 700r4,2400 act. stall speed,B&M hammer shifter, 17" budnick trilogy III wheels, 275/40 ZR17, 160 stat, man. cooling fan sw., homemaid CAI,1LE elbow, hypertech airfoil, t.b.bypass,!cat, flowmaster, !maf screen, relocated batt., 1LE front l.c.a.s', poly trans and torq.arm bushings, MSD 6AL, custom program, p&p maf, accel coil, and under drive pulley

mods that i have, just not on car yet:
msd wires, edelbrock mid. headers, edelbrock rpm catback

 

I bought a vacuum canister from summit and I had to relearn how to stop my car because I actually had a brake pedal. My 79 was just like what you are describing with no brake at lower rpms. The vacuum canister is a lot cheaper and worked/works great for me.

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12 second 400 sm blk 79 Street Camaro. 68 camaro with 400sm blk street/strip project
http://www.wilsonmotorsports.net

 

sweet. than there is hope. thanks anyone else have experience w/these? chris