| Author |
Message |
Tcash
Samba Member
Joined: July 20, 2011
Posts: 12844
Location: San Jose, California, USA
|
 Posted: Sat Jul 14, 2018 4:53 pm Post subject: Re: High CHTs |
 |
|
| samwise wrote: |
| Could hold my hand on the fan shroud for 4-5 seconds before it got uncomfortably hot. |
You got a baseline, now crank your oven up and find out what temp that 4-5 seconds is?
Tcash |
|
| Back to top |
|
 |
Tcash
Samba Member
Joined: July 20, 2011
Posts: 12844
Location: San Jose, California, USA
|
| Posted: Sat Jul 14, 2018 5:00 pm Post subject: Re: High CHTs |
|
|
Or you can use the Grilling Temperatures method.
http://onyourgrill.com/grilling-temperatures/
Tcash
You need to figure out why you are lean, I would guess 90% of the time, it is a vacuum leak, 80% of the time it is the TSII. |
|
| Back to top |
|
|
Tcash
Samba Member
Joined: July 20, 2011
Posts: 12844
Location: San Jose, California, USA
|
| Posted: Sat Jul 14, 2018 5:03 pm Post subject: Re: High CHTs |
|
|
| You could back pin one of the injector connectors and jump the cvs driving the mixture rich. Test drive it and see where you are at. |
|
| Back to top |
|
|
pittwagen
Samba Member
Joined: November 08, 2005
Posts: 765
Location: North of the 49th parallel
|
| Posted: Sat Jul 14, 2018 5:59 pm Post subject: Re: High CHTs |
|
|
Yes SlowLane Aircare is dead. Liberal govt pandering to the masses. Did not work. They were defeated in last election. I will rethink the LC-2.
Tcash, I used my infrared thermometer to check heat ar various locations. We really need some data on the mixture. At one point I found some data from CARB on my bus. It spent most of its life in your area. It was one of the last 79's into the port of San Fran. |
|
| Back to top |
|
|
SGKent 
Samba Member
Joined: October 30, 2007
Posts: 41031
Location: Citrus Heights CA (Near Sacramento)
|
| Posted: Sat Jul 14, 2018 7:59 pm Post subject: Re: High CHTs |
|
|
can't tune one of these without an air to fuel meter. I can say that most seem to get around 18 - 19 MPG when in tune at 50 - 60 mpg flat and level. Anything higher in mileage is leaner and runs hotter.
_________________
“Most people don’t know what they’re doing, and a lot of them are really good at it.” - George Carlin |
|
| Back to top |
|
|
pittwagen
Samba Member
Joined: November 08, 2005
Posts: 765
Location: North of the 49th parallel
|
| Posted: Sat Jul 14, 2018 9:39 pm Post subject: Re: High CHTs |
|
|
| Yup. Thats about right for mileage. Maybe a bit more under ideal circumstances but that is rare. Winter mileage can drop about 2 mpg if I use the BN4 a lot. |
|
| Back to top |
|
|
guitarman63mm
Samba Member
Joined: September 03, 2008
Posts: 797
Location: Asheville, NC
|
| Posted: Sat Jul 14, 2018 10:33 pm Post subject: Re: High CHTs |
|
|
On a day with high ambient temps, low 400s in 4th is perfectly possible. Why not gear down to 3rd and see where you land? Going 50 in 3rd vs. 4th will easily drop CHTs by 25 degrees.
Yes, your motor will be humming at 3800-4200 rpm depending on your tires, but as was said before - you really ought to never be giving it more than 50-75% throttle for cruising, any more and you're just cooking it.
Of course, check all of the items mentioned previously (timing, vacuum, etc.) - but consider downshifting more.
_________________
Jimmy
- 1974 Safaré Custom Camper. 091 trans + Dual Weber 34 ICTs + Pertronix SVDA + 1.7L 914 T4 engine. |
|
| Back to top |
|
|
samwise
Samba Member
Joined: May 04, 2010
Posts: 611
Location: North Salt Lake, Utah
|
| Posted: Thu Jul 26, 2018 10:51 am Post subject: Re: High CHTs |
|
|
Life gets in the way - family obligations, young kids, root canal, etc etc. Still hoping to get onto this at some point.
Missing under tin for driver's side:
Passenger side is there, missing some bolts
Part # for a 1979 California model?
Looking at the parts fiche, left lower are either 043 119 351B or 021 119 355B, but there's lots of warm air channels shown on the fiche, so am I missing other things too?
Click for bigger
_________________
Ben
1979 7-passenger bus
Harvee the Wonder Bus' pics |
|
| Back to top |
|
|
|
