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joecitizennn · Joined: 12 Sep 2005 Posts: 2096 Location: no mans land

Ok gohim. I know this is your hot topic. In the following link is a car that the owner claims to have made better by removing the water pump, and replacing it with an aluminum plate. I gotta hear some comments on this.

http://cgi.ebay.com/ebaymotors/Bulletproof-custom-timing-drive-electric-cooling-system_W0QQitemZ260186946586QQihZ016QQcategoryZ6434QQssPageNameZWDVWQQrdZ1QQcmdZViewItem
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87 924s
88 924SE gone
447 hp cgt clone
87 924S gone
84 944 sold
83 944 sold
89 turbo S LSD, ABS etc
86 951 white rocket
85 944 sport everything.
84 944 sold.
87 944 sold

johnathan1 · Joined: 08 Oct 2007 Posts: 308 Location: Downey, Ca

Don't see why it won't work...

People put those pumps on Supras all the time, which come stock with a pump similar to the 944...I think the advantage here is that hot coolant can be circulated through the cooling system while the engine is turned off. And the electric pump may be capable of higher flow rates than the stock pump...
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-1977 924, 4-Spd...Gone
-1987 Toyota Supra Turbo, Pearl White, BPU, 300RWHP @ 10psi.
-1989 Mercedes-Benz 300SEL

WARNING: MAY CONTAIN TRACES OF AUDI OR VW!

gohim · Joined: 02 Nov 2002 Posts: 4459 Location: Rialto, CA

uhh,

No thanks.

While it may work, there are too many unanswered questions for me to risk my engines.

Like, how does changing the number of teeth affect camshaft timing, and belt life? Obviously, if some rollers or pulleys were removed, and the belt line was changed belt life is going to be affected as the belt is shorter, and will rotate more times per minute.

I sincerely doubt if you are going to increase belt life to 240K miles as the Seller claims.

Rasta Monsta · Joined: 12 Jul 2006 Posts: 11733 Location: PacNW

I like how they say the "head first" cooling system is "like the LT1". . .it is also like the GTR Paul & I photographed at the Porsche Parade. The stock pump was still there, but no longer belt driven. An external pump (that looked a bit like a turbo) ran the cooling system instead, and pumped cool water from the rad into the rear of the head, and out the front of the motor. Pretty interesting.
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Toofah King Bad

WeiBe (1987 924S 2.5t) - 931 S3

Rich H · Posted: Wed Nov 28, 2007 6:56 pm Post subject:

Some of the Elise models have electric bypass pumps fitted that keep the water flowing (As they can lunch Head Gaskets

) but they are in addition to the engine pump and quite small, they just stop the water from standing in the head and overheating.

Do you guys get that much trouble with overheating? Is it that big a problem?
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1994 Lotus Esprit S4 - Work in progress...
1980 Porsche 924 S2 DITC Turbo - Original spec
1978 Homo-Sapiens - Tired spec
1953 Landrover S1 - Pensioner Spec

Rasta Monsta · Joined: 12 Jul 2006 Posts: 11733 Location: PacNW

Not since I got a monster aluminum rad.
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Toofah King Bad

WeiBe (1987 924S 2.5t) - 931 S3

Nobbi · Joined: 24 Aug 2006 Posts: 1396 Location: Germany

hey mates,

all new bmw models are delivered with a non-belt-driven waterpump.They work electric and are only switch on when needed.(Thermostat)
It reduces fuel consumption and is called "efficient- dynamics".Also with the package comes a start-stop function,engine off while just rolling and after a complet stop just press the clutch and engine starts.

crazy these germans....... but gas is getting expensive!

Nobbi

johnathan1 · Joined: 08 Oct 2007 Posts: 308 Location: Downey, Ca

I found this picture on a Supra forum I frequent...This guy uses this electric water pump inline with the lower radiator hose, on his 550HP big turbo inline-6, and reports far better cooling than the stock pump...Thought it was pretty interesting.

The thought behind using one is that you can get better cooler at lower speeds, for instance when you are in traffic in the summer with the AC on...and you get better flow at higher engine speeds, where the stock pump tends to cavitate.
_________________
-1977 924, 4-Spd...Gone
-1987 Toyota Supra Turbo, Pearl White, BPU, 300RWHP @ 10psi.
-1989 Mercedes-Benz 300SEL

WARNING: MAY CONTAIN TRACES OF AUDI OR VW!

Paul · Posted: Fri Nov 30, 2007 12:28 pm Post subject:

From this year's Parade (check out the water pumps and the HP:

_________________
White 87 924S "Ghost"
Silver 98 986 3.6l 320 HP "Frank N Stein"
White 01 986 "Christine"
Polar Silver 02 996TT. "Turbo"
Owned and repaired 924s since 1977
Porsche: It's not driving, it's therapy.