LC/LJ Torana Brakes
#26
Posted 18 March 2022 - 06:49 PM
#27
Posted 18 March 2022 - 07:31 PM
take the one way valve off the booster and check it first , probably not the problem but its the easiest thing to start at
#28
Posted 18 March 2022 - 08:14 PM
Rexy, do you mean to run electric pump to booster, no engine vac? Do i still need cut -off switch?/ Thanks Paul
Correct.
You have a closed system with vacuum hose that contains the booster and the switch - switch reads the vacuum in the booster and switches on and off as required.
The pump is connected into this system with a one way valve in the line between the pump and the booster closed system. This valve only allows air to flow out of the booster system. Air out = increased vacuum.
If you have less than 10 inches of vacuum from the engine then a vac pump will produce a marked improvement in brake performance.
One persons big cam is another’s economy grind….
#29
Posted 19 March 2022 - 04:40 AM
264 @ .050", .600" lift, 105 LSA and I still stop ok.
#30
Posted 19 March 2022 - 03:29 PM
Out of interest what manifold vacuum does it make?
#31
Posted 19 March 2022 - 05:15 PM
around 8" but as other forum members have suggested, i will start with booster first. My local brake dealer said they cant test but might shop around, as i have mentioned earlier, dont want to waste money if not booster problem, paul
#32
Posted 19 March 2022 - 08:08 PM
8" is not enough
18" is the norm
You def need more supply
#33
Posted 19 March 2022 - 09:00 PM
was the booster connect when you got 8" ?
Vacuum leaks will cause low vacuum
block the boosters hose if the engine vacuum rises the boosters leaking
#34
Posted 20 March 2022 - 06:59 AM
No i just connected vacuum guage to carby spacer outlet, (engine vacuum)
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