can you get different spec of otter switch?

[chrisdurham]

hello,

can you get different spec of otter switch? cars getting quite hot now ive fitted a new working stat - gauge may not be accurate though.

just wondering what my options are?

[Barreti]

You might find this interesting clicky

[Simon says]

Hope Spend don't mind me quoting this
TVR COOLING INTERMOTOR ELECTRIC FAN SWITCHES



Part No.A/F Size Thread Temp °C

50100 29 M22 x 1.5 82-68
50101 29 M22 x 1.5 84-79/88-83
50250 29 M22 x 1.5 86-76
50012 29 M22 x 1.5 86-77
50090 29 M22 x 1.5 86-81
50120 29 M22 x 1.5 88-79
50295 29 M22 x 1.5 88-79
50296 29 M22 x 1.5 88-79/110-102
50271 29 M22 x 1.5 88-83
50272 29 M22 x 1.5 88-83
50275 29 M22 x 1.5 88-83
50217 29 M22 x 1.5 88-83/92-87
50091 29 M22 x 1.5 88-83/92-87
50212 29 M22 x 1.5 88-83/92-87
50213 29 M22 x 1.5 88-83/92-87
50216 29 M22 x 1.5 88-83/92-87
50221 29 M22 x 1.5 88-83/92-87
50219 29 M22 x 1.5 88-83/92-97
50240 29 M22 x 1.5 90-80
50110 29 M22 x 1.5 92-82
50111 29 M22 x 1.5 92-82
50112 29 M22 x 1.5 92-82
50113 29 M22 x 1.5 92-82/95-80
50218 29 M22 x 1.5 92-82/97-92
50170 29 M22 x 1.5 92-87
50200 29 M22 x 1.5 92-87
50210 29 M22 x 1.5 92-87
50211 29 M22 x 1.5 92-87
50220 29 M22 x 1.5 92-87
50230 29 M22 x 1.5 92-87
50231 29 M22 x 1.5 92-87
50235 29 M22 x 1.5 92-87
50260 29 M22 x 1.5 92-87
50270 29 M22 x 1.5 92-87
50280 29 M22 x 1.5 92-87
50281 29 M22 x 1.5 92-87
50285 29 M22 x 1.5 92-87
50290 29 M22 x 1.5 92-87
50215 29 M22 x 1.5 92-87/97-92
50011 29 M22 x 1.5 93-88
50102 29 M22 x 1.5 93-88/97-92
50035 29 M22 x 1.5 95-85/102-92
50130 29 M22 x 1.5 95-86
50030 29 M22 x 1.5 95-90
50033 29 M22 x 1.5 95-90
50061 29 M22 x 1.5 95-90
50062 29 M22 x 1.5 95-90
50160 29 M22 x 1.5 95-90
50092 29 M22 x 1.5 95-90/100-95
50174 29 M22 x 1.5 95-90/100-95
50104 29 M22 x 1.5 97-92
50282 29 M22 x 1.5 97-92
50103 29 M22 x 1.5 97-92/101 -96
50214 29 M22 x 1.5 97-92/102-97
50190 29 M22 x 1.5 100-95
50195 29 M22 x 1.5 100-95
50196 29 M22 x 1.5 100-95
50197 29 M22 x 1.5 100-95
50198 29 M22 x 1.5 100-95/110-105
50000 29 M22 x 1.5 103-98
50013 29 M22 x 1.5 103-98
50014 29 M22 x 1.5 103-98
50191 29 M22 x 1.5 120-115

[chrisdurham]

hi guys,

dont think they have the temp range i need - LMAO - only kidding.

IVe just put a std new stat in, 82 deg. but would like the fans cutting in a bit sooner.

Is the 92-87 the std range?

Looking at that though, the next range down is 92-82 will that work being so close to the stat opening temp or am I trying to achive a temp it wont get down to without using a colder stat?

[Simon says]

The 1 I removed from my car about 5 yrs ago as OE pt number PRC 3541 temp 96/91 C

[scotty_d]

I disconnected my otter and went for this. This let me set the fans to come on at what ever temp i wanted, great little MOD that worked a treat when i had my chim.

http://www.djbeer.hostingbt.com/id29.html

Edited by scotty_d on Friday 11th May 00:21

[Bassfiend]

scotty_d said:

I disconnected my otter and went for this. This let me set the fans to come on at what ever temp i wanted, great little MOD.

http://www.djbeer.hostingbt.com/id29.html

My fans are now controlled by the ECU ... I'll find a blanking bung so that I can get rid of the dodgy looking (now unused) otter switch.

Phil

[scotty_d]

Hi Phil are you on a After market ecu now? Thats how the Cerb works as well all done through the ECU.

[chrisdurham]

hi guys,

ive just bought one of the 92-87 ones, it has a small look coming off it - so i will have to mod my wiring a bit but no problem with that.

I see that the switch actually switches earth. Does this then go through a relay? or does the full load of both fans go through the otter switch?

[Pink_Floyd]

chrisdurham said:

I see that the switch actually switches earth. Does this then go through a relay? or does the full load of both fans go through the otter switch?

Through a relay.

[Dr Mike Oxgreen]

Barreti said:

You might find this interesting clicky

At first, that looked interesting. But on studying the circuit diagram in the installation instructions, two problems strike me: firstly, the fan override only seems to switch one of the fans on; secondly, I can't think of a way of wiring the existing otter switch into that circuit in such a way that it switches both fans on whilst maintaining the fans' independence when controlled by the relays, if you see what I mean. I would also want to wire the otter switch so that it doesn't go through the relays - otherwise it's not a true backup if the relay(s) fail.

You could wire the otter switch instead of the fan override in that circuit, but it would only switch one fan on and it would still not work if the corresponding relay had failed. Alternatively, you could wire the otter switch between +12V and the high-temperature fan, which would completely bypass everything but only switch that one fan on - and have the manual fan override switch acting on the low-temperature fan, as depicted in the circuit diagram.

But on balance I think I prefer the concept of the mod-wise two-stage kit, which I believe leaves the otter switch able to completely override everything and switch both fans on.

Does anyone know if the mod-wise kit is compatible with aircon - i.e. can the aircon still switch the fans on and off?

[blitzracing]

Hve a look at the kenlow offering for a Fan 2 stage kit, (just the control unit) it has just a single electronic sensor you pop into the radator core, really neat.

http://www.demon-tweeks.co.uk/motorsport/fan-contr...

Edited by blitzracing on Friday 11th May 12:25

[Bluebottle]

Simon says said:

Hope Spend don't mind me quoting this
TVR COOLING INTERMOTOR ELECTRIC FAN SWITCHES



Part No.A/F Size Thread Temp °C

50100 29 M22 x 1.5 82-68
50101 29 M22 x 1.5 84-79/88-83
50250 29 M22 x 1.5 86-76
50012 29 M22 x 1.5 86-77
50090 29 M22 x 1.5 86-81
50120 29 M22 x 1.5 88-79
50295 29 M22 x 1.5 88-79
50296 29 M22 x 1.5 88-79/110-102
50271 29 M22 x 1.5 88-83
50272 29 M22 x 1.5 88-83
50275 29 M22 x 1.5 88-83
50217 29 M22 x 1.5 88-83/92-87
50091 29 M22 x 1.5 88-83/92-87
50212 29 M22 x 1.5 88-83/92-87
50213 29 M22 x 1.5 88-83/92-87
50216 29 M22 x 1.5 88-83/92-87
50221 29 M22 x 1.5 88-83/92-87
50219 29 M22 x 1.5 88-83/92-97
50240 29 M22 x 1.5 90-80
50110 29 M22 x 1.5 92-82
50111 29 M22 x 1.5 92-82
50112 29 M22 x 1.5 92-82
50113 29 M22 x 1.5 92-82/95-80
50218 29 M22 x 1.5 92-82/97-92
50170 29 M22 x 1.5 92-87
50200 29 M22 x 1.5 92-87
50210 29 M22 x 1.5 92-87
50211 29 M22 x 1.5 92-87
50220 29 M22 x 1.5 92-87
50230 29 M22 x 1.5 92-87
50231 29 M22 x 1.5 92-87
50235 29 M22 x 1.5 92-87
50260 29 M22 x 1.5 92-87
50270 29 M22 x 1.5 92-87
50280 29 M22 x 1.5 92-87
50281 29 M22 x 1.5 92-87
50285 29 M22 x 1.5 92-87
50290 29 M22 x 1.5 92-87
50215 29 M22 x 1.5 92-87/97-92
50011 29 M22 x 1.5 93-88
50102 29 M22 x 1.5 93-88/97-92
50035 29 M22 x 1.5 95-85/102-92
50130 29 M22 x 1.5 95-86
50030 29 M22 x 1.5 95-90
50033 29 M22 x 1.5 95-90
50061 29 M22 x 1.5 95-90
50062 29 M22 x 1.5 95-90
50160 29 M22 x 1.5 95-90
50092 29 M22 x 1.5 95-90/100-95
50174 29 M22 x 1.5 95-90/100-95
50104 29 M22 x 1.5 97-92
50282 29 M22 x 1.5 97-92
50103 29 M22 x 1.5 97-92/101 -96
50214 29 M22 x 1.5 97-92/102-97
50190 29 M22 x 1.5 100-95
50195 29 M22 x 1.5 100-95
50196 29 M22 x 1.5 100-95
50197 29 M22 x 1.5 100-95
50198 29 M22 x 1.5 100-95/110-105
50000 29 M22 x 1.5 103-98
50013 29 M22 x 1.5 103-98
50014 29 M22 x 1.5 103-98
50191 29 M22 x 1.5 120-115

can somebody confirm that the 3 pin otters switches with 2no. temp ranges are a simple case of 1 pin is ground and then choosing either of the other 2 pins to select the temp range?
I dont have a cooling issue on Road but the intercooler is making life marginal at 12 psi boost on track where i saw charge temp in/out difference of over 40 Deg's which is causing my water temps to spike.
I've bought new fans which will increase free flow volume from 3800m3/hr to 5500m3/hr, but i want the fans to kick in sooner and draw down further just during track days and this seems like a simple pin switch rather can complex thermal switch boxes (the go wrong and long since chucked away).

Edited by Bluebottle on Monday 21st March 14:33

[Sardonicus]

Bluebottle said:

can somebody confirm that the 3 pin otters switches with 2no. temp ranges are a simple case of 1 pin is ground and then choosing either of the other 2 pins to select the temp range?
I dont have a cooling issue on Road but the intercooler is making life marginal at 12 psi boost on track where i saw charge temp in/out difference of nearly 40 Deg's which is causing my water temps to spike.
I've bought new fans which will increase free flow volume from 38oom3/hr to 5400m3/hr, but i want the fans to kick in sooner and draw down further just during track days and this seems like a simple pin switch rather can complex thermal switch boxes (the go wrong and long since chucked away).

Yep to ground the relay coil no problem, I did look at both VW/Audi and Citroen/Peugeot green 87/92 degrees,you will however need a resistor pack to run the fans at different speeds though unless your driving one fan then a 2nd

[Brerabit]

Another variation some of us are using is to have one of the fans switched by the ECU (CANEMS on mine) and the second fan switched by the otter switch at a higher temperature. This way you get two stage cooling and little bit more fault tolerance due to the two discrete routes.

[Bluebottle]

Sardonicus said:

ep to ground the relay coil no problem, I did look at both VW/Audi and Citroen/Peugeot green 87/92 degrees

Excellent thanks This should do nicely for road/track swicth M22 x 1.5 88-83/92-87

[Sardonicus]

Bluebottle said:

Excellent thanks This should do nicely for road/track swicth M22 x 1.5 88-83/92-87

[Bassfiend229hp]

Sardonicus said:

Bluebottle said:

Excellent thanks This should do nicely for road/track swicth M22 x 1.5 88-83/92-87

Is that a single unit with two separate switches?

Phil

[Bluebottle]

Bassfiend229hp said:

Sardonicus said:

Bluebottle said:

Excellent thanks This should do nicely for road/track swicth M22 x 1.5 88-83/92-87

Is that a single unit with two separate switches?

Phil

Yep single otter switch with 3 poles, you could rig up a relay and switch between the two temp ranges, but i'm just going swap the wire over in the pits on T/D's

[Bassfiend229hp]

Bluebottle said:

Yep single otter switch with 3 poles, you could rig up a relay and switch between the two temp ranges, but i'm just going swap the wire over in the pits on T/D's

Bugger that - looks to do exactly what I'm after it doing with my microcontroller solution in a single switch.

Two relays - one per fan - and we're good to go!

Where did you get it?

Phil