thekid

I road race a 13B N/A motor in a single seat Sports Racer an would like to find out if anyone has an opinion on water temp. I tried a new rad set-up this weekend and water temp was 150-160deg F, oil at 180deg F. Can the rotary run too cool?

Thanks.

Randy

j9fd3s

wow that might actually be too cool. the factory likes to run the engines in the 85-95c range (i think thats 180-200f). 235f/115c is bascially where it breaks. i would think that because all the clearances and stuff are setup for 180-200 kind of temps that thats gonna be the best place to have em, but thats my opinion and not based on anything more than a guess. i can see where you'd want to have some safety margin too



mike

dr0x

Actually, the 230ish F limit comes from the coolant, not the motor.

IGY

I saw a test on a 400hp Fd where they ran it at 85 C and it made 400hp, and then ran the same car at 75 C and only made 360hp.

toddp31

Guess I need to put a switch on my fans, I am only seeing 60-65c with them on all the time because they weren't working. I am not boosting yet, but I don't think it will jump all the way to 80-85C. Where can I order a temp controled switch? What should oil temp be at?

jspecracer7

With the stock dual oil coolers, you should have appx 5 to 10 degrees higher than water at idle. Once the oil coolers get air flowing to them, they tend to cool down quickly.

surfpac

http://www.dwyer-inst.com/htdocs/temperatu...riesTSR-TSD.cfm

http://www.directron.com/doc5.html

toddp31

thanks