I have decided to remove the majority of the hoses that were used to plumb in my w2a system. Whodumbass used 3/4" heater hose from end to end. I want to fab up some hardlines in aluminum. My buddy suggested I try PVC schedule 20. Obviously it wont be under much pressure. I am using the BOSCH "cobra" pump. I would be concerned about the temps coming out of the intercooler itself. I am not convinced. I would appreciate some input.

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2009 G8 GT Kook's 1 3/4 LT's, Kooks catted Xpipe, Magnaflow axleback, Vararam CAI, HSRK, HPTuners, Atari gauges

1988 Fiero GT L67, PT67bb, w2a, F23, & more

1987 Fiero GT 3.4TDC Road Racer.

ƒ13r0'$ rµ£3

quote Originally posted by BV MotorSports: I have decided to remove the majority of the hoses that were used to plumb in my w2a system. Whodumbass used 3/4" heater hose from end to end. I want to fab up some hardlines in aluminum. My buddy suggested I try PVC schedule 20. Obviously it wont be under much pressure. I am using the BOSCH "cobra" pump. I would be concerned about the temps coming out of the intercooler itself. I am not convinced. I would appreciate some input.

What's wrong with 3/4" heater hose and how would PVC be better if it takes up the same diameter space? You'll need to state your goals to have some idea of what kind of outlet water temps you can expect. Generally a high performance pump (Mezier for example) should work well with smaller diameter hose as the high pressure capability allows it to keep water flow sufficient relative to the lower performing bilge pumps which need tube diameter to insure good flow and cooling performance. I'm not sure where the BOSCH pump stands but a 3/4" outlet should be mated to a 3/4" line. McMaster Carr may have the flexible aluminum tubing to get the job done unless you happen to have some Fiero A/C or heater lines laying around to use in that application, otherwise I wouldn't go any smaller than 5/8".

[This message has been edited by Joseph Upson (edited 08-14-2013).]

I have used two of the large ID a/c lines. Works well and installs easily. Some re-forming required, but easy to accomplish.

quote Originally posted by Joseph Upson: What's wrong with 3/4" heater hose and how would PVC be better if it takes up the same diameter space? You'll need to state your goals to have some idea of what kind of outlet water temps you can expect. Generally a high performance pump (Mezier for example) should work well with smaller diameter hose as the high pressure capability allows it to keep water flow sufficient relative to the lower performing bilge pumps which need tube diameter to insure good flow and cooling performance. I'm not sure where the BOSCH pump stands but a 3/4" outlet should be mated to a 3/4" line. McMaster Carr may have the flexible aluminum tubing to get the job done unless you happen to have some Fiero A/C or heater lines laying around to use in that application, otherwise I wouldn't go any smaller than 5/8".

I don't like 20ft of rubber hose being used in my w2a system. It may be OK, but I don't like it. So that is why I want it replaced with something better suited for the task at hand.

I have 2 long azz copper hoses. It works pretty well.

quote Originally posted by BV MotorSports: I don't like 20ft of rubber hose being used in my w2a system. It may be OK, but I don't like it. So that is why I want it replaced with something better suited for the task at hand.

Whatever you use, you're not going to generate enough heat to put a dent in it so there's no worry to spend there unless you remove the heat exchanger and run about 15 psi continuously for 15 minutes. That may be long enough to heat 2 gallons hot enough to burn your hand and maybe damage your pump but it's not going to hurt your plumbing.

So you are saying the PVC pipe will be ok to use?

quote Originally posted by BV MotorSports: So you are saying the PVC pipe will be ok to use?

You'll have more to worry about popping up beneath the car and hitting it than damage from warm water.

You might find this thread with pump performance results interesting;

http://www.yellowbullet.com...wthread.php?t=564702