Quote:
Originally Posted by Vetman
My stock 1990 #2441 with 70,000 ran was running about 195 when on the road. Stop and go about 220 and with AC on looks like about 240. Marc programmed my chip and with AC on in traffic never over 200. Dave McClellan has stated that the stock radiator has more capacity than needed for the LT-5. I am convinced. Just clean up your radiator and get Marc's chip!
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What was the ambient temperature when you were running observing Coolant Temperatures?
Concur on cleaning the Stock Radiator but as Jim suggests the only way to really clean the Stock Radiator is to remove it for cleaning. I did not remove my Stock Radiator and thought it was clean but it was NOT completely Clean resulting in higher Coolant Temperatures.
The beauty of a Ron Davis Radiator (or any one of several other Aftermarket Aluminum Radiators) is that you do not have to turn AC off or concern yourself with relatively high Coolant Temperatures on HOT days in Stop and Go Traffic. I am talking about Coolant Temperatures over 230 deg F which I think is normal for a Stock Radiator with AC ON idling on HOT (over 100 deg F) days.
I am running more than 25 deg F Cooler with Ron Davis Radiator in traffic on HOT days.
Using Ron Davis Radiators......100 deg ambient temperature (no wind). Both a 1990 and a 1991 ZR1 had the same identical Results (the 1991 with Full Offroad Exhaust).
Cruising at 60 mph in 5th with AC Full On (fans at speed 10) Coolant Temperature stabilized at 197 deg F.
Idling (for at least 15 minutes) with AC Full ON (fans at speed 10) Coolant Temperature stabilized at 213 deg F. This Coolant Temperature dropped to 208 deg F with AC Off.