9 Rules for Improving Engine Cooling System Capability in Hi-Perf Auto - Chevelle Tech
Heating & Cooling Heating, cooling and air conditioning

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post #1 of 1 (permalink) Old Apr 21st, 17, 8:28 AM Thread Starter
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9 Rules for Improving Engine Cooling System Capability in Hi-Perf Auto

This might be a good read and/ for a Sticky for the H&C Forum
9 Rules for Improving Engine Cooling System Capability in High-Perf Autos
Produced by the National Automotive Radiator Association (NARSA) and by Richard F. Crook, Transpro, Inc.

- IMPROVEMENT RULE # 1 -Anything you can do to increase the coolant flow rate, within limits described, will improve heat transfer and cooling performance. Anything you do to restrict or reduce the coolant flow rate will hurt cooling performance

-IMPROVEMENT RULE #2- Anything you can do to improve airflow through the radiator core will help. Anything that blocks or slows airflow, either before or after the radiator, will hurt.

- IMPROVEMENT RULE - #3 Increasing the face area of the radiator by making the radiator larger will help. Relocating other heat exchangers that were in front of the radiator in order to expose more radiator face area to ambient cooling air will also help.

-IMPROVEMENT RULE- #4 Increasing the fin count may help, but it may hurt. Increasing the count above 16 fins per inch will almost always hurt.

-IMPROVEMENT RULE- #5 A plate fin radiator and a serpentine fin radiator of the same fin count, tube size, tube rows, face area, core depth, etc., will have the same heat transfer performance. However, serpentine fin radiators can be made with higher fin counts, sometimes resulting in improved performance.

-IMPROVEMENT RULE-#6 Louvered fins provide greatly improved heat transfer with some increase in cooling air restriction. Changing from a non-louvered radiator to a louvered radiator core almost always improves heat transfer performance.

-IMPROVEMENT RULE- #7 Adding a row of tubes may help, but it may hurt by increasing cooling air restriction and reducing the coolant flow rate in the tubes. If the cooling airflow has been increased over the original installation, adding a row or two will probably help in this situation. Increasing the number of rows beyond 4 in a louvered fin core will almost always hurt.

-IMPROVEMENT RULE- #8 Adding two rows of tubes without increasing the coolant flow rate (Bigger pump or turning the old pump faster) will probably reduce performance because of low coolant flow rate in the tubes. Reducing the tube size or going to dimple tubes may help. Increasing the coolant flow rate will surely help.

-IMPROVEMENT RULE- #9 For maximum heat transfer performance in warm climates, use water as a coolant with an additive to provide a corrosion inhibitor and water pump lubricant.For winter service, use a 50/50 water to ethylene glycol coolant solution that includes corrosion inhibitors and a pump lubricant.
Thor454 and Not2Fast like this.

67 Chevelle Malibu SS Cdn
Born 283 / PG / A51
Now 468/Th400 2,500 stall/ S60 3.70 Gs
Prev M&H MSS001 street Tires/dress 2015/9/20
60' = 1.756 1/8 = 7.815 et / 89 mph
1/4 = 12.253 et / 111 mph
NEW Best on M/T S/R #6641 street Tires/dress 2016/10/9
60' = 1.720 1/8 = 7.747 et / 89 mph
1/4 = 12.112 et / 112 mph

Last edited by Kirk's67SS; Apr 21st, 17 at 8:52 AM.
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