thermo fans

demonx · December 18, 2006, 04:22:09 PM

I've been thinking about upgrading the original fan set up to a twin thermo fan setup.

Anyone have any input or comments/opinions?

Has anyone else here done anything similar?

77CVT · December 18, 2006, 04:43:01 PM

ICE fans flow as well as Davies Craig and drag a LOT less amps. For a C3 I still think you will need a shroud unless you have a big alum radiator.

2 x 10in will fit (just). You may get away with a 10in primary and a larger secondary.

It wouldn't be hard to make one if you are handy with fibreglass. Just make a template of the rad from 3mm mdf and build the rest from there. A '75 rad is a different shape to a '77 FYI.

MADLT1 · December 18, 2006, 04:59:35 PM

i have the standard fan on mine ,but i allso have twin thermos at front of radiator,they come on at about 160 and work fine,in summer i will run at 180 on a long drive,it ran better befor with a 7 blade at the front of engine.

Chromie · December 18, 2006, 05:21:59 PM

Hi demonx;42
I do not recommend thermo fans at all on C3's or earlier.;38
Use a 160 degree F thermostat with factory fan blade and fan clutch with factory fan shroud.;27
While thermofans may keep your engine under the boiling point. They will not keep it as cool as the factory design.;50
To put it simply it will feel like you are driving your Corvette with the heater on all the time.
;37;37
Hope this helps:25

MADLT1 · December 18, 2006, 05:49:20 PM

i disagree,i dont think the factory desighn works for the australian climate,there are more c3s out there bioling there heads off with factory setup then there is cool ones with factory setup,just my experience with them.;40

Chromie · December 18, 2006, 06:55:09 PM

QuoteOriginally posted by MADLT1
i disagree,i dont think the factory desighn works for the australian climate,there are more c3s out there bioling there heads off with factory setup then there is cool ones with factory setup,just my experience with them.;40

Sorry MADLT1;37
But all the Corvettes that I have done barely get off the 100 degree mark in cool conditions and might reach quarter on the gauge when in Summer stuck in traffic big block or small block
And I am more than happy to show the Corvettes to proove it;42

MADLT1 · December 18, 2006, 06:58:48 PM

very interesting chromie,could we do a poll on this one,chime in cam:grr:grr

Cameron 77C3 · December 18, 2006, 07:02:10 PM

For my two cents worth. One, I have never used the electric fans so can not comment there but what I do know is that all your rubbers that go around your fan shroud need to be intact or you still may get air bypassing your radiator. Your air dam needs to be fitted as well.

On a side note, as I stated, I have not used the electric fans but I have heard people not being happy with the electric fans ON C3'S.

MADLT1 · December 18, 2006, 07:27:53 PM

still not convinced ;37 sorry boys ;eek

Cameron 77C3 · December 18, 2006, 07:34:03 PM

QuoteOriginally posted by MADLT1
very interesting chromie,could we do a poll on this one,chime in cam:grr:grr

Ask and thou shall receive.

Tell me what questions ya want asked.

MADLT1 · December 18, 2006, 08:01:44 PM

ok lets see, the question is for those with c2 & c3.does your car run cool all year round with a factory set up,or my car runs cool now because i alterd the cooling system.hows that sound?

Chromie · December 18, 2006, 08:02:46 PM

QuoteOriginally posted by MADLT1
still not convinced ;37 sorry boys ;eek

MADLT1 my son;42
As I have said I have a Big Block Corvette here and I am more than happy to let it idle all day, and let you watch the temperature gauge and use a thermo gun to confirm the temperature. I can also get more Corvettes in to confirm that the one I have is not a one off.;29;29
You can'tr argue with proof my son:spook

MADLT1 · December 18, 2006, 08:07:27 PM

i think a poll would be fun;43;43,mine will idle all day too and stay cool,but then the twin thermos will cut in and make sure of it ;42;42

demonx · December 18, 2006, 08:27:37 PM

Some interesting points.

I'm going to get the block and radiator reverse flushed in a few weeks, so maybe thats a good time to put in a new thermostat.

For now I'll sit back and watch you guys kill each other deciding whether thermo or factory is better.

Cameron 77C3 · December 18, 2006, 08:41:07 PM

QuoteOriginally posted by Chromie
.............You can'tr argue with proof my son:spook

That's never stopped you before. ;53:22

QuoteOriginally posted by MADLT1
i think a poll would be fun;43;43,mine will idle all day too and stay cool,but then the twin thermos will cut in and make sure of it ;42;42

Yes I'm still waiting for you to tell me what ya want in the poll. Read my post a few up in this thread.:grr

Actually here it is for ya

QuoteOriginally posted by Cameron 77C3
QuoteOriginally posted by MADLT1
very interesting chromie,could we do a poll on this one,chime in cam:grr:grr

Ask and thou shall receive.

Tell me what questions ya want asked.

Get ya act together :22;39

reserved · December 18, 2006, 08:43:17 PM

;55

My C3 ran at a temperature of 210 to 220C with a 210C thermostat fitted.
I had the thermostat changed to a 180C one and now it runs at 180 to 190C.

;42

Cameron 77C3 · December 18, 2006, 08:45:47 PM

QuoteOriginally posted by reserved
;55

My C3 ran at a temperature of 210 to 220C with a 210C thermostat fitted.
I had the thermostat changed to a 180C one and now it runs at 180 to 190C.

;42

Ah yes, but the big question we have here is what fans are you running? Electric or original? That's what all the fuss is about. ;35:22

QuoteOriginally posted by Cameron 77C3
QuoteOriginally posted by MADLT1
very interesting chromie,could we do a poll on this one,chime in cam:grr:grr

Ask and thou shall receive.

Tell me what questions ya want asked.

reserved · December 18, 2006, 09:19:15 PM

QuoteOriginally posted by reserved
;55

My C3 ran at a temperature of 210 to 220C with a 210C thermostat fitted.
I had the thermostat changed to a 180C one and now it runs at 180 to 190C.

;42

I am runing a standard setup.

;mmm
However I just realised that my car does not run on super heated steam and all reference to degrees C shoukd be
degrees F

:p

MADLT1 · December 18, 2006, 09:42:17 PM

QuoteOriginally posted by MADLT1
ok lets see, the question is for those with c2 & c3.does your car run cool all year round with a factory set up,or my car runs cool now because i alterd the cooling system.hows that sound?

i have my act together,cam you just missed it;40;40;40;40;40

Cameron 77C3 · December 18, 2006, 10:05:00 PM

QuoteOriginally posted by MADLT1
QuoteOriginally posted by MADLT1
ok lets see, the question is for those with c2 & c3.does your car run cool all year round with a factory set up,or my car runs cool now because i alterd the cooling system.hows that sound?
i have my act together,cam you just missed it;40;40;40;40;40

DOOHH! ;30 ;39

I'll get straight on it. ;35