[Ducati Scotty]

Cool!  Any idea how that works?  Does it just send a constant voltage so that the ECU thinks the mixture is just fine all the time?

Scott

[prof_stack]

Here is the dyno run (top gear) chart.
The BLACK LINE is the Torque (upper graph) and HP (lower graph).
The RED LINE is the Torque and HP with the airbox door open.

Notice how just getting more air into the chamber improves things a lot once the motor is past 3,000 rpm's.  5th gear at 45mph is about that rev rate.  So, roll-ons would be improved with more air in the box.

Later, I'll post the Air-Fuel ratios.  This UCE shows to be rich for most all of the range.

[ace.cafe]

Dynos vary, so the numbers are most useful as a relative measurement against a baseline test of the bike on the same dyno.
So, I would use this same dyno for all future tests, and use this test as your baseline for comparison.

The issue of improvement with the airbox open seems to show restriction in cfm air flow thru the filter  or intake system at torque peak and higher. This creates a drop in air pressure at the throttle body entry, which impairs volumetric efficiency.
It's not terribly unusual for stock systems to show this kind of behavior.

Regarding the questions about 33% drive-line loss, these bikes usually show about 5hp driveline loss in the non-UCE 5-speeds, and I doubt that the UCE is any worse than the pre-unit models. The UCE should be a little better than the pre-unit in this regard.
So, I suspect that the crank hp rating was also optimistic.

[Ducati Scotty]

It's interesting how much the torque drops off at high revs.

Stack, was this with the stock paper filter or the K&N?  If you need a bigger filter the 65-68 Corvair filter fits in the box.  You can't use the airbox retrofit and you should flip the bottom bolt so it points out but you can get a paper one at any auto shop for $10 or get a K&N for way more flow.

Scott

[prof_stack]

It's interesting how much the torque drops off at high revs.

Stack, was this with the stock paper filter or the K&N?  If you need a bigger filter the 65-68 Corvair filter fits in the box.  You can't use the airbox retrofit and you should flip the bottom bolt so it points out but you can get a paper one at any auto shop for $10 or get a K&N for way more flow.

Scott

The K&N filter is the one in my C5.  There was no plastic cover inside the airbox.  I'll check out the Corvair filter.  Got part #'s?  thanks!

[Ducati Scotty]

http://www.knfilters.com/search/product.aspx?Prod=E-1150

E-1150

And  pic of my paper element one:
http://www.enfieldmotorcycles.com/forum/index.php?action=gallery;sa=view;id=3328

Scott

[prof_stack]

http://www.knfilters.com/search/product.aspx?Prod=E-1150
E-1150
...Scott

Great, Scott!  A shop in town has the E-1150 on the shelf which I will pick up on the way (pedaling) home.

[Desi Bike]

Just looked up the vehicle applications for the 1150 filter. It also fits the Dacia Sandero.. James May would be proud.

[prof_stack]

Here is an interesting chart of the air-fuel ratios over the rpm range.

What mastertuner Marty says is that 13:1 is the usual dividing line between being too lean (higher ratio) or too rich (lower ratio).  Notice that ALL the figures are in the rich range. 

But with the airbox door open, ALL the figures are closer to being "correct". 

So, at least for my C5, job 1 should be to get more air in there.  We'll see how the E-1150 pans out.

[Ducati Scotty]

It'd be nice if they did a run with a stock paper filter for comparison to the K&N.  They shouldn't charge you for that, they can use it as marketing material to sell K&N filters to new RE owners

Scott

[Ducati Scotty]

Hmmmmm...  If a C5 does 90mph with stock gearing (18/40) then we should be able to hit 95mph with 19/40 gearing.  Getting closer to the ton

[r80rt]

I think the UCE will be able to hit the ton with out a lot of work or expense, it's a sweet little machine.

[prof_stack]

http://www.knfilters.com/search/product.aspx?Prod=E-1150

E-1150

I pedaled to the Action Autoparts store and found that the 1150 looks WAY too big to fit into the airbox.  Here are the numbers:

K&N E-1150
Height: 3.5 in (89 mm)
Inner Wire: No
Inside Diameter: 8 in (203 mm)
Outside Diameter: 10 in (254 mm)   


This might be the proper size.
Paper
Wix 42087
Height:   3.109
Outer Diameter:  5.500
 Inner Diameter:  3.812
 CFM:  75

The clerk said that the 42087 is for Corvairs without air conditioning while the 42088 (or E-1150) is for Corvairs with air conditioning. 

Do you have a K&N number for the 42087?

Oh, it was a good bicycle ride today, so all is fine.  It will let me drink an extra pint at the Nick tomorrow.

[Ducati Scotty]

http://www.knfilters.com/search/product.aspx?Prod=E-0900
That one cross references with the WIX filter you noted.  And here's the search page:
http://www.knfilters.com/search/appsearch.aspx

I think I looked at 68 Covair earlier and only the 1150 came up.  I looked at 65 and they both came up.  Funny, it says the 1150 is w/o AC and 900 is with.  Regardless, the 900 looks closer to the size we want.

Scott

[prof_stack]

http://www.knfilters.com/search/product.aspx?Prod=E-0900
That one cross references with the WIX filter you noted.  And here's the search page:
http://www.knfilters.com/search/appsearch.aspx

I think I looked at 68 Covair earlier and only the 1150 came up.  I looked at 65 and they both came up.  Funny, it says the 1150 is w/o AC and 900 is with.  Regardless, the 900 looks closer to the size we want.
Scott

Thanks.  Yeah, I got the A/C reversed.  But the clerk did mention 900 for the K&N number, but didn't have any on the shelf.