Itinerant Air-Cooled

It's almost time for another oil change, and valve adjustment.

luftvagon wrote:It's almost time for another oil change, and valve adjustment.

Why is this a whole post?

It's almost time to dust the dashboard, AGAIN.
Colin

Just bragging.. it's been running great. I have been putting some commuting miles on it.

luftvagon wrote:Just bragging.. it's been running great. I have been putting some commuting miles on it.

Commuting? Do you download your 84 channel data recorder at work each morning?
"Hey everybody, it's 43* out there today on I-40 at 17" off the pavement.
By the way, ozone's not too bad today, based on the fact that my EGS skewed only .0006%
towards unaccounted CO since the fuel tanked lightened up .043%. No really. "

Hhaha - Mr. Colin, I never figured you for an internet troll. But you nailed it.. i do annoy my co workers with some useless graphs. :)

Are there any interests in an IAC SPECIAL conversion guide? Several guys from theSamba asked me to post a how to. I recon, this forum would be the place to host it.

luftvagon wrote:Hhaha - Mr. Colin, I never figured you for an internet troll. But you nailed it.. i do annoy my co workers with some useless graphs. :)

Are there any interests in an IAC SPECIAL conversion guide? Several guys from theSamba asked me to post a how to. I recon, this forum would be the place to host it.

Sorry I am late. It's a big internet to troll . . .

If you do a conversion guide, would you have a parts list and a photo how-to?
Would you feel that your work could be extrapolated to other models?
Colin

I have the parts list, and some/most pictures. The system is easily adapted to any engine with some understanding of the car's electrical system.

luftvagon wrote:I have the parts list, and some/most pictures. The system is easily adapted to any engine with some understanding of the car's electrical system.

Then by all means, do a write-up, send me the text via PM, I'll sign off with grammatical corrections only, and you can slap that sucker up in the Engine Technical Forum WITH a sticky link from Fuel Delivery.
Colin

Alright, I removed heater control boxes, and heater elbows... The heater boxes are venting directly out into the open air.... Any issues with that besides having an open hole for critters and spiders to crawl into? I am going to be engineering electrical dash heater... along with the gasoline heater booster... Slightly healthier than OE...

New MPG Report: 21 mpg (87 octane, EGO Control ON, Fuel-Overrun On, mixed city and backroad driving). I am confident I can push this to 25-26 mpg with more conservative driving.

write it up!

luftvagon wrote:Alright, I removed heater control boxes, and heater elbows... The heater boxes are venting directly out into the open air.... Any issues with that besides having an open hole for critters and spiders to crawl into? I am going to be engineering electrical dash heater... along with the gasoline heater booster... Slightly healthier than OE...

New MPG Report: 21 mpg (87 octane, EGO Control ON, Fuel-Overrun On, mixed city and backroad driving). I am confident I can push this to 25-26 mpg with more conservative driving.

Give us a highway fuel mileage report at your next opportunity - steady 65 let's say. Vanagons are more aerodynamic than bays and get the greater advantage at higher speeds.

I can get 22-23 mpg with an aircooled 2.0 at 55 mph. I can get all of 16mpg at 70mph.

Amskeptic wrote:

luftvagon wrote:Alright, I removed heater control boxes, and heater elbows... The heater boxes are venting directly out into the open air.... Any issues with that besides having an open hole for critters and spiders to crawl into? I am going to be engineering electrical dash heater... along with the gasoline heater booster... Slightly healthier than OE...

New MPG Report: 21 mpg (87 octane, EGO Control ON, Fuel-Overrun On, mixed city and backroad driving). I am confident I can push this to 25-26 mpg with more conservative driving.

Give us a highway fuel mileage report at your next opportunity - steady 65 let's say. Vanagons are more aerodynamic than bays and get the greater advantage at higher speeds.

I can get 22-23 mpg with an aircooled 2.0 at 55 mph. I can get all of 16mpg at 70mph.

Vanagon's are also geared better for highway cruising speeds, aren't they?

airkooledchris wrote: Vanagon's are also geared better for highway cruising speeds, aren't they?

Nope. Air-cooled Vanagons, just like their ancestors, are geared for the cooling capacity/horsepower peak/drag intersection. That means, as ever, an air-cooled Vanagon is limited to 75mph cruise @ 4,100 rpm.

Waterboxer Vanagons have slightly taller gearing.
Colin

Mileage report:
This morning I filled up full tank at an I-40 exit. 48.9 miles later, I filled up the tank at the same gas station, and the same pump. It took 2.228 gallons to fill up. Average travel speed was 65mph.

That is 21.94 mpg with the same tune.

I am going to paste some of the graphs shortly.

Data LOG from Return TRIP:



Moment in HIGHLIGHT:
4th gear, 3400 RPM, 65 mph (GPS), 15-inch wheels sporting Michellin HydroEdge P215/65/R15 at 32psi
Manifold Absolute Pressure: 60 kPa
Engine Vacuum: ~11.812 inHg
Barometer: 100.5kPa or 29.53 inHg
Timing @ 29.9 BTDC
Computer estimated consumption based on (pulse width and injector size x 4) = 2.7 GPH
15.3 AFR
Pulse Width: 5ms (x4)
Steady 130F CLT as observed by temperature probe located at Temperature Sensor II location.
Intake Temperature: 99F