Thermostat - pick your brain please?? - Chevelle Tech
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post #1 of 8 (permalink) Old Oct 2nd, 19, 6:56 PM Thread Starter
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Randy
 
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Thermostat - pick your brain please??

Hi guys, I need some advice/opinions. I just installed electric fans on my Chevelle, I'm running a 350HO GM Performance engine in it. The OEM thermostat is a 180 degree which I have in the engine. I contacted Spal technical support and they advised me to install a 205 degree on/190 degree off temperature switch. I ran the car yesterday for the first time and my mechanical gauge indicates the on temperature is just shy of 220 degrees which in my mind is too hot. For another opinion I called Be Cool today and they advised to install the 195 on switch and replace the thermostat with a 160 degree. Give some thought please

Randy B.
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post #2 of 8 (permalink) Old Oct 2nd, 19, 7:05 PM
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Steve
 
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Re: Thermostat - pick your brain please??

Where is the temperature switch sending unit installed and where is the temperature gauge sending unit installed?

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post #3 of 8 (permalink) Old Oct 2nd, 19, 7:15 PM
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Eric
 
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Re: Thermostat - pick your brain please??

I'd leave the thermostat alone and install a 195 on switch.
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post #4 of 8 (permalink) Old Oct 2nd, 19, 9:01 PM Thread Starter
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Randy
 
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Re: Thermostat - pick your brain please??

Both are in the intake ports next to the thermostat.
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post #5 of 8 (permalink) Old Oct 2nd, 19, 10:25 PM
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Al
 
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Re: Thermostat - pick your brain please??

Quote:
Originally Posted by oldcutlass View Post
I'd leave the thermostat alone and install a 195 on switch.
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post #6 of 8 (permalink) Old Oct 3rd, 19, 7:45 AM
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Jeff
 
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Re: Thermostat - pick your brain please??

I'd put a Stant Super Stat 160 in there and put the clutch fan back on....
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post #7 of 8 (permalink) Old Oct 3rd, 19, 8:12 AM
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Rick
 
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Re: Thermostat - pick your brain please??

I have two e-fans that are each supported by their own completely adjustable and independent fan controller systems from the people at Four Seasons. Part number 35879, if I remember correctly.

This gives me cooling safety, reliability and redundancy. Each system has it's own independent power supply, ground, it's own relay, it's own temperature sensor, it's own AC compressor support wire and adjustable thermostat.

This also keeps the alternator from receiving a kick in the teeth if both high amperage fans turn on at the same time. Having a 140 amp LS truck alternator helps here but this system would still be good on far less amp capacity.

I'm very happy with this setup and I think I paid about $35 for each system.

Rick

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post #8 of 8 (permalink) Old Oct 3rd, 19, 10:04 AM
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Greg.
 
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Re: Thermostat - pick your brain please??

Quote:
Originally Posted by Randall B. View Post
Hi guys, I need some advice/opinions. I just installed electric fans on my Chevelle, I'm running a 350HO GM Performance engine in it. The OEM thermostat is a 180 degree which I have in the engine. I contacted Spal technical support and they advised me to install a 205 degree on/190 degree off temperature switch. I ran the car yesterday for the first time and my mechanical gauge indicates the on temperature is just shy of 220 degrees which in my mind is too hot. For another opinion I called Be Cool today and they advised to install the 195 on switch and replace the thermostat with a 160 degree. Give some thought please
First off you have supplied very little info
- what year Chevelle ?
- what type/size of Rad and how many Rows of Tubes ??
.... Efans work best when there are only 2 Rows of 1.25" Tubes to Pull Air thru
- is there a Shroud with the SPAL Efans ?
- is there anything in Front of the Rad Core blocking/Restricting Air Flow

SPAL Efans are the best Efans on the Market IMHO

I have a SPAL Dual 11" Efans/Shroud on my Small(16" Hi x 24" W) 67 Alum Rad with a 160* Thermostat



and the Temp Sender & one Efan Sensor( set at 170*) near the Thermostat Housing
plus the other Efan on a Toggle Switch if I need to turn it ON
and only a Trans Cooler in Front of the Rad that is located 3" Away from the Core and down Low





BBC Engine Runs 170 to 190* on the Hwy with one Efan ON or in the City Traffic with the 2nd Efan ON
plus Back to Back to Back Runs down the 1/4 Mile Track


67 Chevelle Malibu SS Cdn
Born 283 / PG / A51
468/TH400 2,500 stall/ S60 3.70 Gs
Prev Best on M/T ET S/S #3454 street Tires/Dress 2018/05/20
60' = 1.664
1/8 = 7.532 et / 91 mph
1/4 = 11.814 et / 115 mph
NEW Best with 3,500+ Stall TC 2019/09/08
60' = 1.547
1/8 = 7.311 et / 91.76 mph
1/4 = 11.595 et / 114.28 mph


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