914/V8 Fan Operation, Conversion Cooling Options

[tyler]

Can you conversion guys tell me how your electric fans operate and if you've modified the air dam?
Put in my 15.5x28 Griffin radiator with 944 Turbo fans on a shroud. Crusin at 70 on the freeway the temp starts at 170 for 6 miles and creeps up to 195 when the fans come on and bring it back to 170. This continues to cycle like this both on the freeway and around town. I'm using a 160 Tsat until the cooling system is done. I ran with the lid off so I know the cuts in the wells are ok. So I figure I'm either blocking the airflow with the fans/shroud or the air dam need to channel the air in somehow. It doesn't seem to me like the temp should cycle like this. I'd like to hear how yours run.
Thanks,
Tyler
'70 914/350/4 webers

[John2kx]

QUOTE (tyler @ Jul 22 2005, 10:56 AM)

I plan to move the fans and shroud back to make sure I'm not blocking airflow out of the radiator. Next I'll put the cover back on the airspace in front of the radiator to see if that directs air into, instead of over the radiator (I've been running all open with the hood off).

Putting the cover back on shroud is highly advised and should help a lot when on the road. Too much air is being allowed to escape through the opening and not "through" radiator. The right t-stat (180F) and setting the fans to come on earlier should fine tune the system in all areas of operation (traffic and open road).

Note: the Renegade switch is set to come on at 180F and off at 171F. Your system is playing catch up with the activation switch set at 200F.

I'd also do some further testing to really heat soak engine and cooling system. I define a real test as logging 30 or so miles of open road driving in 90+F weather with a occasion journey in stop and go traffic.

I really like the idea of holes (three 1/8" equally spaced) in the t-stat since the "by pass" is omitted with the remote water pump. The holes in t-stat eliminate dead heading of pump when starting from cold as well as provides a path for air to escape from "other side" of cooling system when being filled. Also assists in removal of air when performing the burping procedure.

John