| View previous topic :: View next topic |
| Author |
Message |
Wildthings
Samba Member
Joined: March 13, 2005
Posts: 19931
|
 Posted: Wed Dec 22, 2010 10:40 am Post subject: Thermo Time Switch differences |
 |
|
Need to replace the Thermo Time Switch on my '72 411 which is running an L-Jet FI system off of a '76 bus. Would love a TTS which operated at about 20-25°C verses 35°C. Any one know what rigs might have used a TTS that operated in this range?
Thanks |
|
| Back to top |
|
 |
Wildthings
Samba Member
Joined: March 13, 2005
Posts: 19931
|
| Posted: Wed Dec 22, 2010 8:13 pm Post subject: |
|
|
| Well getting no replies I guess I will go with the OEM 35°C TTS. Looks like JC Whitney will get my business with a genuine Bosch switch for $75 shipped. They also have the 15°C Porsche switch of $87 shipped. |
|
| Back to top |
|
|
Wildthings
Samba Member
Joined: March 13, 2005
Posts: 19931
|
| Posted: Thu Dec 23, 2010 12:22 pm Post subject: |
|
|
Ordered the one for the Porsche from JC Whitney. Don't think I have ordered anything from them in a decade or more, not typically my first choice. But they supposedly have the part and they claim its a Bosch.
Why do these things fail or get out of adjustment anyway? I found several 35°C ones in my stash and all were still in the closed (cold) mode at least as high as 45°C. |
|
| Back to top |
|
|
raygreenwood
Samba Member
Joined: November 24, 2008
Posts: 4937
Location: Des moines Iowa
|
| Posted: Thu Dec 23, 2010 7:03 pm Post subject: |
|
|
| Sorry I was not close to my books and things to answer. They fail because they are a bimetallic element inside. Over the years and also with eat cycling, both metals work harden and lose some of their expansion or contraction ability. This makes them no longer accurate and sometime no longer operable. They can also corrode if they get moisture in them. There are also some models on some cars that have their own electrical heating element in them to give them the time feature. That can also burn through and fail just like a choke element. Ray |
|
| Back to top |
|
|
Wildthings
Samba Member
Joined: March 13, 2005
Posts: 19931
|
| Posted: Thu Dec 23, 2010 7:16 pm Post subject: |
|
|
| After not being able to find one that operated perfectly in my stash, it's got me worrying about keeping an L-jet running cheaply for another decade or two. I guess a button in the dash would work well enough if and when they become unavailable. |
|
| Back to top |
|
|
Wildthings
Samba Member
Joined: March 13, 2005
Posts: 19931
|
| Posted: Fri Dec 31, 2010 12:37 am Post subject: |
|
|
| JC Whitney didn't come through with a TTS for a Porsche, so I ordered one from them for a bus. We will see if they can supply the bus one for their quoted price. |
|
| Back to top |
|
|
Lars S
Samba Member
Joined: October 04, 2007
Posts: 172
Location: Sweden
|
| Posted: Sat Jan 01, 2011 6:57 am Post subject: |
|
|
There are lots of cheap (and small) industrial thermo switches available to almost any temperature setting and differtent hysteresis, wonder if these can withstand the vibrations at a car engine....
However these have no internal heating element in them so they will only use the heat from the engine to react and the right location is more important.
Below is one example.
/Lars S
http://ae.rsdelivers.com/product/rs/2455r-9082-459...82658.aspx
_________________
Porsche 914 -72, Bahia Red daily driver
VW411 2-d -70, White, in archive
VW412 4-d, -73, Gold Metallic, daily driver
Suzuki T500, -69, Candy Gold, in archive
Suzuki K50, -77, Black, daily driver
BMW R69S -69, White, in archive
Husqvarna 118cc, -47, Black, in archive |
|
| Back to top |
|
|
Wildthings
Samba Member
Joined: March 13, 2005
Posts: 19931
|
| Posted: Sun Jan 02, 2011 12:20 pm Post subject: |
|
|
| I think I will take the new stock style TTS switch when I get it and make a custom mount for it, relocating it to where it will be easier to access and set it up so it has a better thermal connection to the block. |
|
| Back to top |
|
|
ALLWAGONS
Samba Member
Joined: June 03, 2000
Posts: 2122
Location: Southern California
|
| Posted: Thu Jan 06, 2011 9:40 am Post subject: Re: Thermo Time Switch differences |
|
|
| Wildthings wrote: | Need to replace the Thermo Time Switch on my '72 411 which is running an L-Jet FI system off of a '76 bus. Would love a TTS which operated at about 20-25°C verses 35°C. Any one know what rigs might have used a TTS that operated in this range?
Thanks |
What's the part #?
_________________
Cancer, You have claimed another beautiful life, but You will be defeated....
I rather have a profitable than a sustainable lifestyle
I recycle old cars and parts, other than when I rot, that's as Green as I am going to get. |
|
| Back to top |
|
|
Wildthings
Samba Member
Joined: March 13, 2005
Posts: 19931
|
| Posted: Thu Jan 06, 2011 9:56 am Post subject: Re: Thermo Time Switch differences |
|
|
| ALLWAGONS wrote: | | Wildthings wrote: | Need to replace the Thermo Time Switch on my '72 411 which is running an L-Jet FI system off of a '76 bus. Would love a TTS which operated at about 20-25°C verses 35°C. Any one know what rigs might have used a TTS that operated in this range?
Thanks |
What's the part #? |
Haven't found that such a part actually exists. The ones for a T4 engine either operated below 10°C or 35°C depending on year and the Porsche ones below 15°C. I have found nothing that tells me at what temperatures other cold starts on other vehicles operate. Was hoping someone else might know. |
|
| Back to top |
|
|
ALLWAGONS
Samba Member
Joined: June 03, 2000
Posts: 2122
Location: Southern California
|
| Posted: Thu Jan 06, 2011 10:20 am Post subject: |
|
|
Actual pic. I'll look in my parts manual. I need onetoo. So I was told.
_________________
Cancer, You have claimed another beautiful life, but You will be defeated....
I rather have a profitable than a sustainable lifestyle
I recycle old cars and parts, other than when I rot, that's as Green as I am going to get. |
|
| Back to top |
|
|
|
