Vacuum reservoir

[Deleted User]

Hello all, I am looking to put a vacuum reservoir on the Hash and would like to talk with anyone who has done this and if there are any cons to the pro of having vacuum during acceleration. I am also going to add a overflow reservoir in case I have any heating problems



Harry

Unknown

Harry,



Make sure you put a check valve in the line from the vacuum cannister to the intake manifold. The idea is for the valve to close when there is insufficient vacuum, like when accelerating. An example of which would be the plastic check valve you have on a vacuum brake booster, just smaller. The line from the cannister to whatever is to be vacuum driven (wipers) would be a straight shot.



If you're going to do an overflow tank and want it to function properly, you can use your stock radiator cap. However, make sure that it seals to the top of the radiator neck. If you don't have this upper seal, and as the car cools, there will be no vacuum to draw fluid back into the radiator. Then, you can fill the radiator to the top without worry.



Dave

Park_W

Harry, for the vacuum tank, be sure to get a well designed one. I had one for a while that was made like a typical large "juice can" from the grocery. With its flat crimped on end-pieces, the constant back and forth flexing with varying vacuum kept causing the end-pieces to develop cracks at the outer edge. Soldered it up several times before finally chucking it in the trash. Now running without one, and with the dual (vacuum booster) pump on the engine, there seems to be no problem with either the wipers or the vacuum-operated cruise control unit.