Harvester Gas Engine Fuel Octane Rating

[blmtnc]

Shockingly its only 4,300rpm when generating.

Wow, yeah, I'm gonna call BS on BMW's recommendation for premium in that application. Considering my motorbike runs a 12.2 CR, redlines at just under 12K, doesn't even have a knock sensor, and calls for only 90+ octane. Unless BMW is doing something with the combustion process that really induces knock (super lean mixture, higher than normal cylinder head temps, etc), I'm just not seeing it. But I am intrigued lol.

 

[timmyhil]

Wow, yeah, I'm gonna call BS on BMW's recommendation for premium in that application. Considering my motorbike runs a 12.2 CR, redlines at just under 12K, doesn't even have a knock sensor, and calls for only 90+ octane. Unless BMW is doing something with the combustion process that really induces knock (super lean mixture, higher than normal cylinder head temps, etc), I'm just not seeing it. But I am intrigued lol.

It did have to meet the environment emissions targets. They usually run on the lean side.

It happens to be one of my favorite engine to work on because of the complexity and the uniqueness of how it runs and is tuned.

 

[hayduke]

not a mechanic or engineer...but why not use LPG?

 

[timmyhil]

not a mechanic or engineer...but why not use LPG?

I believe it has to do with that its pressurized.

 

[hayduke]

yeah, but there are plenty of engines which are powered/converted to lpg, right? it's also generally cleaner than gasoline. (https://afdc.energy.gov/fuels/propane-benefits)

so figure if the Harvester version (which I've reserved) is solely to get us a another 150miles, and since I'm looking at the EV as a. "cleaner" vehicle than what I'm driving, why not use lpg?

 

[timmyhil]

yeah, but there are plenty of engines which are powered/converted to lpg, right? it's also generally cleaner than gasoline. (https://afdc.energy.gov/fuels/propane-benefits)

so figure if the Harvester version (which I've reserved) is solely to get us a another 150miles, and since I'm looking at the EV as a. "cleaner" vehicle than what I'm driving, why not use lpg?

False the Battery gets us 150miles and the Harvester gets us the other 350miles. It was confirmed by Jamie from Scout.

 

[hayduke]

Sure...math...still doesn't answer the question about why not LPG vs "which octane"

 

[timmyhil]

Because LPG isnt well established. With the car industry. For Gas Grills they are.

 

[JesseS]

Why on earth would a generator engine have a turbo??, not going to happen. A DC generator will have a variable speed demand governor, speed dependent on load, with a RPM limiter.

 

[timmyhil]

Why on earth would a generator engine have a turbo??, not going to happen. A DC generator will have a variable speed demand governor, speed dependent on load, with a RPM limiter.

You would really hope that Scout keeps it simple with a naturally Aspirated engine but it all depends on what they get from VW.