our 340 challenger is only making 7.5in vac at idle and the brakes are not great.I want to keep the power brakes and would prefer not to spend a pile of money on the pump since this motor is only staying in the car for a few months than a 5.7 hemi is going in.Any recommendations for reasonably inexpensive reasonably quiet vac pump options? Maybe a junkyard oem setup or?
I tried a cannister today but was a waste of money,need a pump it seems....
D.
You need a minimum of 10 inches vac with a manual tranny vehicle, and at least 12 inches with an auto to have safe repeatable braking... I've used the SSBC vacuum pump with good success along with a vac resv canister, the pump is going to make some noise when it's running, just try and mount it on rubber pads/feet to limit the noise/vibration, I hid it in the front fender behind the headlight, and the vac resv canister under the battery tray to keep the engine compartment clean and factory looking
FYI: I had the SSBC pump on a 472 HEMI/auto with a big cam and a dual diaphragm Bendix booster, initially I could only get about 8" of vac, the SSBC/resv canister was good for a steady 14-15" of vac, and steady repeatable braking and good vacuum recovery
Mike
