davies craig thermo switch

[vscaprice98]

done me cooling system in me 5ltr repalced rad to 3 core uped the size of the transmission cooler to big basterd got a 16inch thermo fan on there now resized me orginal shroud for the fan to pull center air out cooling system is going good but any ideas roughly where to set the thermo switch atm i got it set on 92 deg where me thermistate opens is that a good spot or bring it up just a touch to about 93 94

[hako]

If you are using the standard 1.35Kpa/20psi radiator cap, then I'd use the setting the standard electric fans come on at - from memory it's 103deg. Also it will depend on what thermostat you have fitted and where the thermo switch is located. You don't want to run them cold as it's not best for efficiency - your thermostat starts to open at 92deg so switching the fans on just a little above this may cause the fans to run when the really don't need to. The 3 core radiator will be excellent for cooling....
What I'd do is leave the engine idling and watch the temperature gauge - when it reaches a reading just above where it normally sits, adjust the thermo switch to bring the fans on.....watch it cool the engine and switch off then see if it switches in again at the desired gauge reading.

[vscaprice98]

thanks hako me thermistate is opening at 92 degrees i was thinking about going back down to a 88 thermistate and prob be able to play around with the temperature and work out what temperature me motor runs best at as well where some motors run better running hotter than others do running at a lower temperature

[VrWagz1]

Just from threads on this forum, the 16" thermo will be to small. It will probably work through winter but wont be sufficient on a warm summers day. Pretty much duel thermos is the only way to go with the 5ltrs. I have twin au thermos on mine and they work hard on a hot summers day, but they do work. I had the memcal re-flashed though, to use the factory ecu thermo fan output though.

[vscaprice98]

i was looking at the au fans but the 16 inch fan im running delivers more cfm than the au fans do had a good look at it and the fan im running is Thermo Fans the 16 inch one from these guys