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Cooling testing #2546768
09/06/18 04:36 PM
09/06/18 04:36 PM
Joined: Mar 2004
Posts: 314
Medina, OH
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dart440_72 Offline OP
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dart440_72  Offline OP
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Joined: Mar 2004
Posts: 314
Medina, OH
I just wanted to share some of the most scientific coolant testing that I am capable of. I have been chasing cooling issues for a while so I thought I would play with different restrictors, thermostat, and open system.

This is what I found:

Outside temp 75
Lower hose 137
Upper hose 98
Car holding at 186
Restrictor 3/4"

Outside temp 75
Lower hose 132
Upper hose 100
Car holding 196
Restrictor 1"

Outside temp 75
Lower hose 128
Upper hose 91
Car holding 188
180 thermostat

Outside temp 75
Lower hose 142
Upper hose 93
Car holding 197
Open system

Outside temp 75
Lower hose 131
Upper hose 92
Car holding 198
Restrictor 5/8"


72 Dart 500" low deck Indy SR heads. 10.40 @129 best so far
Re: Cooling testing [Re: dart440_72] #2546783
09/06/18 04:52 PM
09/06/18 04:52 PM
Joined: Aug 2011
Posts: 2,842
Pattison Texas
CSK Offline
master
CSK  Offline
master

Joined: Aug 2011
Posts: 2,842
Pattison Texas
Why is the upper hose colder ? reverse flow ?


1968 Charger COLD A/C Hilborn EFI
512ci 9.7 compression, Stealth heads, 4.10 gear A518 ODtrans 4100lb,10.93 full street car trim
2020 T/A 392 Stock 11.79 @ 114.5

Re: Cooling testing [Re: dart440_72] #2546791
09/06/18 05:11 PM
09/06/18 05:11 PM
Joined: Jan 2003
Posts: 14,478
So. Burlington, Vt.
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fast68plymouth Offline
I Live Here
fast68plymouth  Offline
I Live Here
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Joined: Jan 2003
Posts: 14,478
So. Burlington, Vt.
Assuming you just mixed up the upper/lower hose temps....your findings seem to contradict this:

http://stewartcomponents.com/index.php?route=information/information&information_id=11


68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123
Dealer for Comp Cams/Indy Heads
Re: Cooling testing [Re: dart440_72] #2547057
09/07/18 03:33 AM
09/07/18 03:33 AM
Joined: Nov 2003
Posts: 36,040
Lincoln Nebraska
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RapidRobert Offline
Circle Track
RapidRobert  Offline
Circle Track
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Joined: Nov 2003
Posts: 36,040
Lincoln Nebraska
Quote:
I have been chasing cooling issues for a while so I thought I would play with different restrictors, thermostat, and open system.
what system/parts/tuning/symptoms do you have?


live every 24 hour block of time like it's your last day on earth
Re: Cooling testing [Re: dart440_72] #2547077
09/07/18 09:22 AM
09/07/18 09:22 AM
Joined: Mar 2004
Posts: 314
Medina, OH
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dart440_72 Offline OP
enthusiast
dart440_72  Offline OP
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Joined: Mar 2004
Posts: 314
Medina, OH
I have a griffin radiator, flowkooler pump, with a 1:1 pulley ratio. I am trying to figure out why my upper hose is cooler than my lower. I tested the pump and it is pushing water out the top hose. But I can't understand why the top hose would be cooler than the bottom


72 Dart 500" low deck Indy SR heads. 10.40 @129 best so far






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