[Chevelle-list] Is there really a "high flow water pump?"

[Brad Waller]

Actually, the last part is wrong.  50/50 water/antifreeze is not as
efficient at transfering heat.  It lowers the freeze point and rasies the
boiling point, and it adds required lubrication for the water pump.  Pure
water will cool the car off, but you need to add a lubricant (or additive
that includes a lubricant) if you even want to think about it.  You also
need to be 100% certain that it will nevre freeze.

I have used distilled water plus water wetter quite successfully.  You could
go to a 25/75 solution of antifreeze/water for better heat transfer and
maintain a reasonable freeze protection for most people.  I wouldn't do this
in a northern winter, but we're talking about summer overheating I think.

Look at the chart for Heat Capacity on this page: 
http://www.engineeringtoolbox.com/ethylene-glycol-d_146.html
And you will see a significant increase in Heat Capacity for 25% ethylyne
glycol compared to 50/50.  The notes say:

Note! The specific heat capacity of an ethylene glycol based water solution
is less than the specific heat of clean water. For a heat transfer system
the circulated volume must be increased.

In a 50% solution with operational temperatures above 36 oF the specific
heat capacity is decreased with aprox. 20%. The reduced specific heat
capacity must be compensated by circulating more fluid.

Brad Waller (brad at epage.com)

'66 Corvette | 327/dead | 4-speed | Wilwood Brakes | 245/45/16 BFG R1
'67 Chevelle | ex-SS396 | 355/700R4 | F-Body Brakes | 275/40/17 Kumho MX

> -----Original Message-----
> From: chevelle-list-bounces at chevelles.net 
> [mailto:chevelle-list-bounces at chevelles.net] On Behalf Of 
> gm66 at netscape.com
> Sent: Saturday, May 31, 2008 7:12 PM
> To: The Chevelle Mailing List
> Subject: Re: [Chevelle-list] Is there really a "high flow water pump?"
> 
>  Also if you have an automatic transmission you need a 4 core 
> radiator. Otherwise a 3 core should suffice. I had a 66 in 
> which somone had put in a 2 core radiator, which should have 
> been a 3 core. Made a big difference. Don't forget to use  
> 50/50 antifreeze ratio coolant also. It diffusses heat better 
> than just water out of the radiator.  Gm66
> 
> --- chevyfan at hughes.net wrote:
> 
> From: "Trooper" <chevyfan at hughes.net>
> To: <jimthompsoncc at gmail.com>,	"The Chevelle Mailing 
> List" <chevelle-list at chevelles.net>
> Subject: Re: [Chevelle-list] Is there really a "high flow water pump?"
> Date: Sat, 31 May 2008 08:01:33 -0500
> 
> Dropping the temp of your thermostat will not affect an 
> overheating problem. 
>   ----- Original Message ----- 
>   From: Jim H. Thompson 
>   To: 'The Chevelle Mailing List' 
>   Sent: Friday, May 30, 2008 6:53 PM
>   Subject: Re: [Chevelle-list] Is there really a "high flow 
> water pump?"
> 
> 
>   Test show that if you have the proper capacity radiator 
> that copper vs aluminum is a break even.
> 
>   Go to a 160 thermostat, flush the block, make sure your 
> hoses are not collapsing inside (do not take out that bottom 
> spring). Test the pressure of your radiator cap that's 
> important for your over flow system.  If you have a clutch 
> fan replace with an aluminum flex fan. Make sure your fan 
> blades come to the back lip of your shroud.  
> 
>    
> 
>   Jim
> 
>    
> 
>   From: chevelle-list-bounces at chevelles.net 
> [mailto:chevelle-list-bounces at chevelles.net] On Behalf Of 
> tabius barrett
>   Sent: Friday, May 30, 2008 2:42 PM
>   To: chevelle-list at chevelles.net
>   Subject: [Chevelle-list] Is there really a "high flow water pump?"
> 
>    
> 
>   Hello all...I have a 71 SS 402 and I am still fighting the 
> summer time over-heat monster. I plan to order an aluminum 
> radiator soon but I remember someone telling me that the 
> so-called "high flow" water pumps are no better than a 
> standard water pump. My overheating seems to really occur at 
> idle (stop light, traffic, etc.). So here is the question: 
> Has anyone really found a high-flow water pump for my car and 
> if so, where can i get it and how much? Also, do you think 
> the aluminum radiator will help?
>    
>   Thanks,
>   tbDallas
> 

>