[DeTomaso] Waterpump

[Ian H]

I decided to go with the Flow Kooler.  First because it was highly 
recomended and second because it was half the price of the Edelbrock.  $89 
from Summit and I got a Robertshaw stat from them too for $22.

Ian


----- Original Message ----- 
From: <JDeRyke at aol.com>
To: <Thomas.Tornblom at hax.se>; <detomaso at realbig.com>
Sent: Tuesday, March 10, 2009 3:19 PM
Subject: Re: [DeTomaso] Waterpump


> In a message dated 3/10/09 7:47:47 AM, Thomas.Tornblom at hax.se writes:
>
>> I am think that further pump improvement can be had be rebuilding a pump
>> with the curved vane impeller and using much closer than EOM tolerances 
>> for the
>> pump vanes to the pump housing. I just had a pump rebuilt in this fashion
>> and the difference in tolerances is significant. I cannot document any
>> improvement in coolant temps at this point with the new engine. In my 
>> opinion, a
>> custom rebuilt water pump over normal aftermarket pumps has similar 
>> advantages to
>> a custom rebuilt carb over an off the shelf Holley. Off the shelf is 
>> purdy
>> good, but custom rebuilt is better.
>>
>> The Edelbrock pump has a cast curved vane impeller, with cast backing 
>> plate.
>> I'm really satisfied with my pump.
>>
> Agreed, but 'better' is relative; I use a fully warmed up engine at 
> 2500-3000
> rpms on the road as my critarium for lowering water temps. Over the years,
> I've changed absolutely everything in our 351-C's cooling system, and 
> NOTHING I
> did had ANY effect at all on the running water temp, except adding a 
> bigger
> aluminum Fluidyne radiator. Thats why I say the benefits of different, 
> more
> efficient pumps, water tubes, thermostats, fans etc, etc are mostly 
> theoretical-
> and maybe psychological- to us owners.
> One other thing- completely removing the thermostat and experimenting with
> restrictor washers of various size holes- will likely also lower 
> stabilized
> water temps. Guys who remove the thermostat and run nothing in its place 
> complain
> about only getting 120 F running water temps at 80 mph.... so this tells 
> me
> the 351-C thermostat is a designed flow restriction that might benefit 
> from
> larger drilled bypass holes in it. Something I'm going to look into later. 
> Cheers-
> J Deryke
>
>
>
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