Is there a high output water pump for the sl6? No, I'm not having cooling problems, but I am wanting more flow for the heater and propane converter. I have noticed that with the propane converter plumbed in, the heater appears to not have a lot of flow through it. I'm going to add a restrictor to the converter flow, but I would still like to find a higher flowing higher pressure water pump to help out.

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'81 W150 on Propane... Oversize valves, Oregon Camshaft cam, 10:5 static CR, Distributorless ignition, megajolt timing controller, PowerTrax lockers.

You may go electric.
(take a look at the booster pump, designed for LPG engines, among other things)

Olaf.

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Aspenized

I don't think that's an option.

I tried searching the forums, but I either get a hundred pages + of hits, or off-topic...

A few years ago, I had overheating problems with a poly 318, to discover there was a better water pump. The impeller was much bigger, more vanes, etc. Solved the issue.

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'81 W150 on Propane... Oversize valves, Oregon Camshaft cam, 10:5 static CR, Distributorless ignition, megajolt timing controller, PowerTrax lockers.

They stopped using the slantsix in cars and trucks almost 25 years ago, I think it is very unlikely that you will find a high capacity after market water pump for the SL6, that will be useful in a daily driver. The only high cap pumps may be for race application.

From what the manufacturer say, the electric pump in the lower part of the page in the link above, was made specifically to cover a situation similar to yours, as an additional booster pump.

Alternatively, you can use a smaller pulley to increase the speed of the pump. High revs may kill your pump, though.

Olaf.

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Aspenized

In the orignal pump impeller configurations there were versions with more "teeth" for the air conditioning equipped cars...
Probably not much of a bother considering the "new" chinese pumps last about 12-15 months if lucky before the bearing starts to squeal, I constantly have had them up to 3-6000 rpms drags or holley supertuning...

Smaller pump pulleys can be found on mopar small blocks and big blocks,
the stickler is the V-8 pulleys have a different "offset to them, so you may have to improvise (using an air conditioning crank pulley, the big block water pump pulley, and an alternator with the 2 row pulley...


-D.Idiot

They stopped production of the poly 318 in 1967 in passenger cars, it's hard to say that the slant six is more obsolete

Just the price alone is enough to rule out using that electric water pump. There may be a less expensive or more affordable one that could be an option, however.

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'81 W150 on Propane... Oversize valves, Oregon Camshaft cam, 10:5 static CR, Distributorless ignition, megajolt timing controller, PowerTrax lockers.

Yes, I get your point, but the V8s has always been more interesting for the manufacturers to make hi-performance parts for.

I believe the mid-sixties Ford 390 V8 (and maybe other engine sizes, I just remember a guy with a 390 using a SL6 pulley) had water pump pulleys that is a bolt-on for the SL6, but I cannot remember if hey are smaller or larger!

Olaf.

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Aspenized

Not on the slant-6, there weren't. There were V8 pumps with different impeller diameters and blade counts, used with different-diameter drive pulleys according to vehicle equipment (A/C, trailer tow, axle ratio).

Factory slant-6 water pump impellers were all 3½" diameter except the 1960 170 engine which used a 3¼" impeller. Six vanes on the cast iron, phenolic, or stamped steel impeller (depending on year). The latest aftermarket pumps have eight vanes -- not because that's better, but because that's what Ming Yoon Chiang Guangzhou World Water Pump Traffic Industrial Concern Ltd has on the shelf that's kinda sorta almost right.

Seems to me it'd be fairly easy for someone with mad CAD skills and hydraulics knowledge to design an upgraded impeller for the \6 water pump, maybe with curved vanes, but it also seems to me the \6 rarely has problems with inadequate water flow due to insufficient water pump capacity, so this whole thread looks to me like either a thought experiment or a misdiagnosis of a problem that is not being caused by an inadequate water pump.

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