Author |
Message |
lawryrg Samba Member
Joined: October 17, 2020 Posts: 115 Location: Pensacola FL
|
Posted: Sun Jun 26, 2022 9:42 am Post subject: 1.7 with Weber progressive; temp sensor options? |
|
|
Greetings, I'm seeking advice on options for a temp sensor / gauge to monitor cylinder head temp / oil temp on my 79 Westy. I've seen lots of temp sensor discussion for FIs but am seeking an option for my setup.
Any advice is greatly appreciated! |
|
Back to top |
|
|
crownline Samba Member
Joined: September 10, 2010 Posts: 589 Location: Northwoods of WI
|
Posted: Sun Jun 26, 2022 10:02 am Post subject: Re: 1.7 with Weber progressive; temp sensor options? |
|
|
Cue can of worms opening.
I don't monitor head Temps but I have the drain plug temp sensor for my type 4 engine. I use it only as a Guage as to see what the average temp is over time. Is it the best spot? (cue the can of worms) It works for me. _________________ 1972 Bus 1700 cc Single Carb. But not a progressive.
Barelymuvin
Wish I still had the ones I got rid of.
"It"s got some dings and dents and neither of us is going to SEMA."(Update, I went to SEMA in 2019 but the Bus stayed home)
[url=http://www.vw-mplate.com/mplate-8446.png]Click to view image[/URL] |
|
Back to top |
|
|
danfromsyr Samba Member
Joined: March 01, 2004 Posts: 15130 Location: Syracuse, NY
|
Posted: Sun Jun 26, 2022 10:31 am Post subject: Re: 1.7 with Weber progressive; temp sensor options? |
|
|
while true that the FI has a Temp-II sensor.. it's just a basic engine temp (is it cold or warm or hot) to calculate the needed fueling maps.
but a cylinder head temp gauge is independent of whether you have FI or a Carb..
if you want to monitor cylinder head temps.. do just that..
/open can of worms
now if you have Fuel injection and a cylinder temp gauge you can make minor adjustments to the fueling to reduce head temps by modifying and modulating the temp-II signal that the ECM receives with a potential meter..
/close can of worms _________________
Abscate wrote: |
These are the reasons we have words like “wanker” |
|
|
Back to top |
|
|
Wildthings Samba Member
Joined: March 13, 2005 Posts: 50262
|
Posted: Sun Jun 26, 2022 1:59 pm Post subject: Re: 1.7 with Weber progressive; temp sensor options? |
|
|
Since progressives tend to run rich, versus FI which tends to run lean, a cylinderhead temperature sender is not as important with a progressive, but can be nice to have anyway.
Note: An oil temperature sender will not tell you much about the combustion process. Oil temperature tends to be rpm dependent, whereas head temperature tends to be load dependent. |
|
Back to top |
|
|
lawryrg Samba Member
Joined: October 17, 2020 Posts: 115 Location: Pensacola FL
|
Posted: Mon Jun 27, 2022 6:10 am Post subject: Re: 1.7 with Weber progressive; temp sensor options? |
|
|
Thanks fellas.
My objective is to monitor how hot the engine is running vice performance related concerns. Its so hot here in Florida I need to ensure my engine is as cool as possible.
Can you recommend a specific oil temp and cylinder head temp setup that works well for you? |
|
Back to top |
|
|
Wildthings Samba Member
Joined: March 13, 2005 Posts: 50262
|
Posted: Mon Jun 27, 2022 6:34 am Post subject: Re: 1.7 with Weber progressive; temp sensor options? |
|
|
Set your timing to 28° BTDC (or maybe a degree or two less) at 3800+ rpm, hoses removed and plugged and use an exhaust analyzer to get you air fuel mixture to 12.5:1 or lower when at full throttle, and drive at night if the ambient temperature gets above 100°F during the day. That is about the best you can do. Also choose an oil like a 10w40 over a 20w50 to maximize oil flow through the cooler and go with synthetic because it can better handle the heat. |
|
Back to top |
|
|
SGKent Samba Member
Joined: October 30, 2007 Posts: 41031 Location: Citrus Heights CA (Near Sacramento)
|
Posted: Mon Jun 27, 2022 7:10 am Post subject: Re: 1.7 with Weber progressive; temp sensor options? |
|
|
you won't be able to really monitor the engine other than trends. I pull oil temp from the sump on the taco plate because it tells me if I am pushing the engine too hard. I monitor cyl head temps on #3 how ever it is more for if an event like a plastic bag got sucked into the engine and covered the fan inlet. It also tells me if i am pushing the engine too hard. I also have a voltage meter, and oil pressure gauge. I tend to watch the oil pressure gauge more than any other gauge. As long as the engine has 10 PSI per 1000 RPM life is good. _________________ “Most people don’t know what they’re doing, and a lot of them are really good at it.” - George Carlin |
|
Back to top |
|
|
Wasted youth Samba Member
Joined: July 06, 2012 Posts: 5134 Location: California's Hot and Smoggy Central Valley
|
Posted: Mon Jun 27, 2022 9:16 am Post subject: Re: 1.7 with Weber progressive; temp sensor options? |
|
|
None of what I am about to say will answer your question, so just skip this blathering...
My understanding of Cyl. 3 temperatures relates back to the Type 1 engine before the oil cooler was moved away from the air path. I have read a few times of people with Type 4 engines continuing to express concern with that cylinder, but I am unclear why.
Monitoring temperatures is not something I do because I don't demand from the bus, beetles or vans any more than they are capable of, and that is done using Butt Dyno. Keeping ALL air seals, grommets and tin IN PLACE with the factory cylinder compression ratio, regular oil changes and valve adjustments, and keeping the engine tuned up has given me many miles of dependable service in a Mediterranean climate.
Having an adjustable timing light, the LM2 analyzer and The Samba people for advice and tips has resolved probably every mistake I used to do. I still have trouble now and then, and sometimes it takes awhile to figure things out.
Yesterday it was 104*f where I live and I drove the air-cooled Vanagon a lot and will soon take it in for a smog check. Not worried about anything. |
|
Back to top |
|
|
borninabus Samba R&D Dept.
Joined: May 18, 2006 Posts: 4532 Location: Arizona Highways
|
Posted: Mon Jun 27, 2022 4:06 pm Post subject: Re: 1.7 with Weber progressive; temp sensor options? |
|
|
an oil temp gauge is a great thing to have on an air cooled vw.
the "best" place for it on a T4 is the "taco plate". _________________ 71 Ghia A/S - 88 Van A/T - 13 JSW TDI 6M/T |
|
Back to top |
|
|
Wasted youth Samba Member
Joined: July 06, 2012 Posts: 5134 Location: California's Hot and Smoggy Central Valley
|
Posted: Mon Jun 27, 2022 6:16 pm Post subject: Re: 1.7 with Weber progressive; temp sensor options? |
|
|
|
|
Back to top |
|
|
orwell84 Samba Member
Joined: May 14, 2007 Posts: 2528 Location: Plattsburgh, New York
|
Posted: Mon Jun 27, 2022 7:24 pm Post subject: Re: 1.7 with Weber progressive; temp sensor options? |
|
|
I like gauges. I started with just an oil temp gauge and it was great for telling me when I was pushing too hard. I also have a cht and oil pressure gauge. Pressure gauge was useful for diagnosing a low pressure issue. Now I just glance at them from time to time. I think the #3 might run a little hotter because of flap for the oil cooler (on a type 4). Maybe not. |
|
Back to top |
|
|
|