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Laso Water Pump - Plastic Impeller

 
Old 05-24-2010, 02:47 PM
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ROG100
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Default Laso Water Pump - Plastic Impeller

Just arrived from Germany.
New build Laso water pump (87 to 95) with the ABS plastic impeller.

THE POWER OF RENNLIST AND THE 928 COMMUNITY.
They do listen to us
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Old 05-24-2010, 02:49 PM
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New new? or New rebuilt? Price?
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Old 05-24-2010, 02:50 PM
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New and $275 comes complete with gasket
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Old 05-24-2010, 02:53 PM
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I notice you wrote that they fit model years 87-95. What is different about the later water pumps vs the earlier water pumps?
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Old 05-24-2010, 02:56 PM
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If you are using a PKensioner it does not matter if you use old or new style.
Up until 86 the idler roller sits on a boss on the water pump.
They also added the bracket you see on the front of the WP.
A picture would be better but I can't find one.

The early style with plastic impellers are on the way to me as well - no worries.
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Old 05-24-2010, 02:57 PM
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Now there is little risk of of the impellor eating into the block is there still benefit from Ed's improved pulley/bearing design? I think yes as it seems like it will prevent a seized pulley and consequent possible valve damage. Is my thinking on this correct?
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Old 05-24-2010, 02:59 PM
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I beleive so for those that need that extra "peace of mind".
I will be selling the new WP's with Ed's modification to the pully for those that want it.
Roger
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Old 05-24-2010, 03:31 PM
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This is good news indeed.
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Old 05-24-2010, 03:40 PM
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These are made from ABS a tougher type of plastic.
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Old 05-24-2010, 03:42 PM
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FWIW here's the factory plastic impeller for comparison. Dunno what type of plastic it is, but the pump's casting date was 2008.

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Old 05-24-2010, 03:42 PM
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Way to go! This is great Laso is supporting 928's!
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Old 05-24-2010, 03:58 PM
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For you Plastic Boffins out there -----
To avoid any damage on the engine block we should change the material from grey cast iron to 40% Glass-Reinforced Ryton PPS. This product is the most recognized PPS. It is the compression molded analogue to Ryton R4 resin. It offers better dimensional stability and thermal performance and maintains its strength to above 425░F (220░C).
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Old 05-24-2010, 04:23 PM
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I disagree Dan.

Ed's design prevents two additional failures. One is the plastic impellor working loose from the knurled shaft. No major damage occurs, just that the car will overheat and the pump will need to be replaced. The second is more significant, in that Ed pins the impellor to the shaft. This prevents the shaft from releasing the impellor and getting pulled forward by the tension on the pulley. This causes catastrophic failure when the TB jumps off track and the valves crash.

What Roger has here is basically an improvement on the stock design and uses new castings, I'd run it on my OB 16v'r no problem. For the stroker, I'd wait until Roger has the sure-thing available. JMHO.


EDIT: Ha Ha, did I just get caught up in double negative here?

Originally Posted by S4ordie View Post
Now there is little risk of of the impellor eating into the block is there still benefit from Ed's improved pulley/bearing design? I think yes as it seems like it will prevent a seized pulley and consequent possible valve damage. Is my thinking on this correct?
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Old 05-24-2010, 04:59 PM
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Originally Posted by ROG100 View Post
I beleive so for those that need that extra "peace of mind".
I will be selling the new WP's with Ed's modification to the pully for those that want it.
Roger
When will those be available and at what price?

What's the availability of just the new pump for now? It's not a limited production run? How soon can you get these after your stock is depleted?
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Old 05-24-2010, 05:06 PM
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Borland,
I have 10 in stock with 4 available.
All Laso pumps will be to this standard - I just got the first batch.
There are still some metal impeller WP out there.

Using a new Laso as a base we are looking at about $650 to $700.
I need to talk to Ed about availability.
Roger
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Does it have the "Do It Yourself" manual transmission, or the superior "Fully Equipped by Porsche" Automatic Transmission? George Layton March 2014

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