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> 914/V8 Fan Operation, Conversion Cooling
tyler
post Jul 22 2005, 08:01 AM
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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
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pjhaun
post Jul 22 2005, 09:23 PM
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QUOTE (John2kx @ Jul 22 2005, 06:32 AM)
Tyler,

It does not sound like you have a real overheating problem since your temps. are well within normal range, but I admire your desire to smooth things out. You may want to burp the system a few times to ensure all air is removed. This will help the temperature cycling if air is present.

A 180F thermostat may keep temps more consistant as well. Of course anytime you break into the cooling system you will have to spend several days going through the burping procedure.

A kinked hose can cause similar problems. Double check the inlet hose to water pump as well as the two smaller hoses from pump to inlet at engine.

What temps. are you using to turn fans on and off? The attached pic shows what RH uses and should show the on and off trip points. Another factor may be where you have your sensor located. The optimum location is at the radiator with sensor actually making contact with coolant as opposed to being attached to a hose or radiator surface.

John

John:

Could you possibly tell me the size of the thermo switch? Is it 3/8" pipe threads?

Thank You!!!!
Phillip J. Haun
Oak Harbor, Wa.
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Posts in this topic
tyler   914/V8 Fan Operation   Jul 22 2005, 08:01 AM
John2kx   Tyler, It does not sound like you have a real ove...   Jul 22 2005, 08:32 AM
914GT   Tyler, John is right. If you go with a 180 thermo...   Jul 22 2005, 09:15 AM
neo914-6   related question, the tstat of choice is Mr Gasket...   Jul 22 2005, 09:42 AM
MikeP   I've drilled a few small holes around the tsta...   Jul 22 2005, 11:31 AM
bondo   How big are your hoses? I've heard having larg...   Jul 22 2005, 11:52 AM
tyler   Thanks for the comments - I did drill a hole in th...   Jul 22 2005, 11:56 AM
bondo     Jul 22 2005, 12:06 PM
914GT     Jul 22 2005, 12:34 PM
tyler   Hoses are 1" from engine and 1-1/4" back to pump. ...   Jul 22 2005, 12:56 PM
John2kx   ...   Jul 22 2005, 02:13 PM
ewdysar   ALL air entering the trunk through your front open...   Jul 22 2005, 02:18 PM
John2kx     Jul 22 2005, 02:29 PM
pjhaun   <...   Jul 22 2005, 09:23 PM
John2kx   Phillip, I'm going on memory, but think it wa...   Jul 22 2005, 09:31 PM
LS6/914   Is there adequite air flow volume exiting the the ...   Jul 22 2005, 09:37 PM
914GT   Do they make those screw-in thermo-switches adjust...   Jul 22 2005, 10:30 PM
tyler   I have a top cover and there is complete sealing t...   Jul 25 2005, 09:45 AM
tyler   I have a sensor threaded into the radiator for set...   Jul 25 2005, 09:49 AM
914GT   The fans would probably shut off if the water temp...   Jul 25 2005, 10:15 AM
Andyrew   Show us a pic of your air inlet. Show us a pic of ...   Jul 25 2005, 10:21 AM
John2kx     Jul 25 2005, 12:34 PM
tyler   John, You're right, I did make a run with both...   Jul 25 2005, 12:46 PM
John2kx   I found these while surfing a little while ago. M...   Jul 25 2005, 01:11 PM
Terryst1   Tyler: The first question I have is how much HP a...   Jul 25 2005, 07:07 PM
Terryst1   Tyler: By the way, I forgot to mention that I hav...   Jul 25 2005, 07:18 PM
John2kx   Terry, Your name sounds familar and I think I kno...   Jul 25 2005, 08:00 PM


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