finished d950 anyone?

SUMO · Post by **SUMO** » Wed Mar 05, 2008 11:21 am

just getting to sorting fuel tank out for the bike and am trying to find out what sort of mpg i will get out of a d950

i really want a small tank but need to get at least to work and back on a fill-up

any ideas?

sbrumby · Post by **sbrumby** » Wed Mar 05, 2008 6:21 pm

A bit difficult to guess what MPG a bike will do but I would think you would get 100mpg, when considering tank size there is pretty & practical. Even if going to work is your only consideration filling up daily would get a bit of a chore.

SUMO · Post by **SUMO** » Wed Mar 05, 2008 10:00 pm

yea - i know its not a good one to guess which i why i was hopeing someone had a completed d950 project and they could tell me what they were getting.that would give me a reasonably accurate guess.

and yup - daily fill up is a chore but i did it on my chop for 6 months filling going in and out of london - at least i can fill up in my garage if its just the once a day

Post by **Stuart** » Wed Mar 05, 2008 11:13 pm

Yeah, I was wondering what I can expect from this Ruggerini 850 I've just got with the Enfield tank

Hoping it will give me a nice balance between power and economy

I guess I'll get about the 100mpg.

Ih8Suvs · Post by **Ih8Suvs** » Thu Mar 06, 2008 4:43 am

[quote="SUMO"]just getting to sorting fuel tank out for the bike and am trying to find out what sort of mpg i will get out of a d950

i really want a small tank but need to get at least to work and back on a fill-up

any ideas?[/quote

Asking what kind of mileage an engine will get is an unanswerable question without more information. What kind of bike are you putting it in? How much will it weigh? How much wind drag will you have? How fast do you drive?

If you want a rough idea, look up the specific fuel consumption specs for your engine, figure out how much horsepower you think you will be using and what the rpm will be at your cruising speed and do some calculations.

SUMO · Post by **SUMO** » Thu Mar 06, 2008 9:53 am

not being arsy but - its not an unanswerable question if you are running that engine in a bike... which is what i was asking

if someone wanted to build a shovelhead i can tell them roughly what mpg they will get by telling them what i get - im not talking accurate but ballpark figure, same goes for any of my bikes that i have running - yep it depends on how happy you are on the throttle and weight and all that other stuff but it is a GOOD ESTIMATE - probably more accurate than my sums would be based on absolute guesses

Ih8Suvs wrote: Asking what kind of mileage an engine will get is an unanswerable question without more information. What kind of bike are you putting it in? How much will it weigh? How much wind drag will you have? How fast do you drive?

If you want a rough idea, look up the specific fuel consumption specs for your engine, figure out how much horsepower you think you will be using and what the rpm will be at your cruising speed and do some calculations.

oilburner · Post by **oilburner** » Thu Mar 06, 2008 12:02 pm

Check out David Hubbard's BMW R80RT on the dieselbike.net website. IIRC this bike gets about 84 mpg (imperial) two up at 70 mph which closely matches the specific fuel consumption figures for the engine and the power requirements for 70 mph which is 12 - 15 hp. Perhaps someone has contact info for David.

Ih8Suvs · Post by **Ih8Suvs** » Fri Mar 07, 2008 5:58 am

I'm sorry if I sounded prickish in my reply, but what I was getting at was it would make a wild difference what kind of bike you are putting the D950 engine in, is it a 1000 pound Ural sidecar rig with 2wd and a ton of wind drag or a 400 pound bike with an aerodynamic fairing. Sorry if you have posted what kind of bike this engine is going into in another post. Also, just out of curiosity, is this a D950 Kubota, or a D950 Daihatsu/Briggs?

Ih8Suvs · Post by **Ih8Suvs** » Fri Mar 07, 2008 6:15 am

Ok, searched the posts and found pics of your project bike, looks good by the way, and based on what I have read about others with similar engines and similar weight bikes I am guessing in the ballpark of 50-70 mpg.

oilburner · Post by **oilburner** » Sat Mar 08, 2008 5:09 am

The sad reality is that you would do nearly as well with a Honda CN250. MIne is 12 years old and still averages 84 mpg, top speed 70 mph, and 225+ miles between fillups.

SUMO · Post by **SUMO** » Sat Mar 08, 2008 11:45 am

if i can get near 80mpg i will be very happy - that will more than half my fuel bill and then when i sort the veg oil / diesel mix it will half again with a bit of luck

thanks all

andrewaust · Post by **andrewaust** » Mon Mar 10, 2008 4:50 am

Hi Sumo

I'm sure you will get that sort of economy. Gearing etc plays a big role in economy along with wind drag etc. I stick a bit of Acetone in the tank to help mainly with performance rather than economy, getting anywhere from 1.4 to 2.2 liters to the 100 K's. Just depends on the conditions "and waiting for ages in traffic" etc.

Reading through the posts I'm sure I read somewhere that your going for high gearing? If you can get hold of the spec sheet for your engine and see where the torque and fuel burn rates are the best and go from there.

Cheers

Andrew

DieselBike.net

finished d950 anyone?

finished d950 anyone?

Re: finished d950 anyone?

Re: finished d950 anyone?