While the number of impeller blades is not the only factor determining coolant flow rate, I think I have read where the coolant flow rate through the radiator of an air-conditioned car is actually lower than that of a non-air-conditioned car. Other factors include pulley diameters and radiator core design. As previously discussed, higher coolant flow rates do not necessarily translate to more heat transfer from the radiator to the airflow across it. Chrysler engineers added a boxed fan shroud, a fan with more blades, possibly a different fan pulley and possibly a higher pressure radiator cap. I'm confident these systems were carefully engineered and tested by Chrysler engineers. It would be interesting to hear from those of you that may have air conditioned letter cars (or any early hemi Chryslers) how your cooling systems actually work in a worst-case scenario of idling while stuck in traffic on a 100 degree plus day. C-300'ly, Rich Barber Brentwood, CA 1955 Chrysler C-300 with "64" a/c From: Chrysler300@xxxxxxxxxxxxxxx [mailto:Chrysler300@xxxxxxxxxxxxxxx] On Behalf Of Jerry Lindsay Sent: Wednesday, June 16, 2010 4:02 AM To: Gary Nelson; skyhawk@xxxxxxxxx; Warren Anderson; bluesport62; Chrysler300@xxxxxxxxxxxxxxx Subject: Re: [Chrysler300] RE: Save the old drums Why would Chrysler design a water pump with (6) blades for a a/c engine and (8) for a non a/c engine? Jerry Lindsay Seminole, Fl. It's hot down ----- Original Message ----- From: Gary Nelson To: Jerry Lindsay ; skyhawk@xxxxxxxxx <mailto:skyhawk%40twave.net> ; Warren Anderson ; bluesport62 ; Chrysler300@xxxxxxxxxxxxxxx <mailto:Chrysler300%40yahoogroups.com> Sent: Tuesday, June 15, 2010 6:07 PM Subject: RE: [Chrysler300] RE: Save the old drums I have 3 re-built 60 up 4 bolt WP in stock. Both a/c and non a/c. a/c has 6 blade impeller, non a/c 8. That is correct, a/c has 2 less blades than non a/c. A bargain at $45 and $50 a/c. Not a pump around that will not start leaking at some point. No core required. I also have kits in stock while they last, up to 58 $29, 59 up $23. What a bargain. Shipping applies. Thank you, Gary, the parts doc Reno, Nevada 89521 USA The Biggest Little City In The World Mail: garythepartsdoc@xxxxxxxxxxxx <mailto:garythepartsdoc%40glnelson.com> 775 851-1420 -----Original Message----- From: Chrysler300@xxxxxxxxxxxxxxx <mailto:Chrysler300%40yahoogroups.com> [mailto:Chrysler300@xxxxxxxxxxxxxxx <mailto:Chrysler300%40yahoogroups.com> ]On Behalf Of Jerry Lindsay Sent: Tuesday, June 15, 2010 1:26 PM To: skyhawk@xxxxxxxxx <mailto:skyhawk%40twave.net> ; Warren Anderson; bluesport62; Chrysler300@xxxxxxxxxxxxxxx <mailto:Chrysler300%40yahoogroups.com> ; Gary Nelson Subject: Re: [Chrysler300] RE: Save the old drums Went down to NAPA today as my water pump on my 62 Sport Coupe was leaking. I had taken one of my one parts car that I had stripped some time ago, figuring I'd need a "core" replacement. He checked and there are only "new" ones available from NAPA now and he said to keep my old Pump which he said looked pretty good and said there is a company that rebuilts them. Also he said that old ones are worth keeping for that. Now, NAPA has brake shoes, but "NO" wheel cylinders or kits "LISTED" Food for thought. I'm beginning to believe that I shouldn't throw anything away now. Jerry Lindsay Seminole, Fl 33772 ----- Original Message ----- From: Gary Nelson To: skyhawk@xxxxxxxxx <mailto:skyhawk%40twave.net> ; Warren Anderson ; bluesport62 ; Chrysler300@xxxxxxxxxxxxxxx <mailto:Chrysler300%40yahoogroups.com> Sent: Tuesday, June 15, 2010 2:24 PM Subject: [Chrysler300] RE: Save the old drums There is a process called "Metal Spraying". I do not see any reason it would not apply to drums. It is to specifically used to build up metal surfaces to recondition. If someone wants to do a Goggle on line search, there my be economics to do several at one time. I am not sure if turning would work, grinding would. Maybe one of you out there has experience with this process. Thank you, Gary, the parts doc Reno, Nevada 89521 USA The Biggest Little City In The World Mail: garythepartsdoc@xxxxxxxxxxxx <mailto:garythepartsdoc%40glnelson.com> 775 851-1420 -----Original Message----- From: skyhawk@xxxxxxxxx <mailto:skyhawk%40twave.net> [mailto:skyhawk@xxxxxxxxx <mailto:skyhawk%40twave.net> ] Sent: Tuesday, June 15, 2010 9:11 AM To: Warren Anderson; bluesport62; Chrysler300@xxxxxxxxxxxxxxx <mailto:Chrysler300%40yahoogroups.com> ; Gary Nelson Subject: Re: [Chrysler300] rear drums You know, there was a time, back in the early 1950s, when welders who knew their stuff took worn brake drums (usually from large trucks), preheated them in a forge, then used a special rod and an electric welder to build up the surface. The drum was then carefully machined back to original tolerances, once again, by someone who knew what they were doing. I was about 6 years old when I spend one whole Saturday watching my Dad build up a set of truck drums for Tallent Transfer, a local long-haul trucking company. Tedious work, to be sure, but given the low quality of Chinese drums, perhaps it might be in vogue once again; assuming, of course, you can find anyone talented enough to do it. -----Original Message----- From: Warren Anderson Sent: Jun 14, 2010 10:37 PM To: bluesport62 , Chrysler300@xxxxxxxxxxxxxxx <mailto:Chrysler300%40yahoogroups.com> , Gary Nelson Subject: Re: [Chrysler300] rear drums Ask Bernbaum witch China they came from. There steel sucks. Gary Maybe so but "that's what's for dinner". When it says 'made in Mexico" maybe that's the good stuff now. Warren Anderson Sedona,AZ. 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