My experience is similar to Ben's. I typically see 10 degrees or less on water temp differential. 30 degrees probably too much unless in cold weather AND you are using a thermostat that limits rad flow.
Oil differential is a lot more. 40 - 50 degrees. Tracy
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For a baseline. On my 300+ HP V-8 ,I average about 11-14 degree difference between water out and water in temps... 30 degrees difference indicates you are not flowing the coolant at a proper speed. The coolant is spending too much time in the radiator, hence the big temp split.. My system holds 7 quarts and I circulate it about every 5 seconds. Worst split was when it was hot outside and I saw 11 degrees. Best was 16 degrees and that was when it was -30f OAT. Most aluminum blocks / aluminum rads cooling systems are designed to to run in the 12 degree delta range. My experimental has been running that way for over 400 hours. IMHO....... Ben Haaswww.haaspowerair.com
RV6A, 1986 13B NA, RD1A, EC2
The water after radiator temp registered 30 degrees below the engine out water.. is this enough?
Wishing you all had problems so basic as mine!
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