Ducati Sporting Club UK > DesmoDue Race Series > DesmoDue - General Questions and Chat > In search of Dallas's Missing ponies

[Ghost]

Originally Posted by skidlids

Thing is guys at the start of the season it had a healthy output in the 64bhp area and then it lost nearly 20% of that and dispite Dallas spending out quite a bit to try and get it sorted its still not back to where it was.

As I said the bike is going through a bit of a re-hash at the moment and one of the things Dallas is hoping to do is to loose the Airbox.
Made a bit easier by Chaz having already repositioned the Battery under the seat.

Just a thought Kev its got adjustable pulleys, yes the marks line up but it doesn't tell you where the cam actually is. So You really need to go thro' that loop either work out at full lift or opening at 1mm lift. But needs veryfying.
He was still .....just faster than me at Pembrey.

[skidlids]

Nope Phil, it was all setup at the start of the season by Baines Racing using the non adjustable cam pulleys just as they did with his 2010 engine, went straight from Baines to have the power commander setup and came out of there with 64 and a bit BHP

[Ghost]

Originally Posted by skidlids

Nope Phil, it was all setup at the start of the season by Baines Racing using the non adjustable cam pulleys just as they did with his 2010 engine, went straight from Baines to have the power commander setup and came out of there with 64 and a bit BHP

Oh F<>k thats that scenario quashed. The Karl foggy lookaike at Pembrey was saying he had 150 psi on his compression. I thought gosh thats good, a lot better than mine. Then I put my trusty snap on guage on his and it read the same as mine 125psi.

So if comp and valve timing are good, then its fuelling or ecu or ignition advance.

Glad I've only got carbs. Good luck Kev, I know Dallas is p....eed off with his outlay and nothing to show for it.

[skidlids]

With Snow white for a front spark plug its certainly pointing to fueling, couldn't see anything that would be giving an air leak, but may well be worth us removing and taking a closer look at the front inlet manifold in case it has a split in it, you'll know exactly what I mean Phil
Maybe take the vac gauges up there next, but they would probably only identify an air leak below the point where the vac gauge connects to

[paynep]

How about checking the fuel pressure? Last year mine was ok when set up on the dyno then over the course of half a season the pump started failing, giving me no power, white plugs and finally a clucked engine come Snetterton.

A quick way is to check that there is fuel coming out of the return pipe, as it will prove there is more than the 3bar regulator pressure....

If that's ok, whip out the injectors and check they're ok, and/or swap front and rear to see if the white plug moves, if its only one plug.

Paul

[skidlids]

Pressure was checked at BSD and given the all clear.
I would also suspect a common element like fuel pressure to cause both cylinders to run weak not just the front one
Already tried another complete set of injectors that came off a bike that was known to be running well.
Maybe its a problem in the harness, is the injector receiving the full signal
The power commander was removed at the same time as the FIM ECU so can't be down to them as its now doing it with just a Magneti Marelli 59M ECU.
Stopped by at Dallas's earlier this evening on the way back from Durham and helped cut a few un-needed wires out of the replacement harness that is going on and just finished making a note of the last few remaining wires we need to connect up.
Once the harness is done its refit the PC3 USB and see about getting it mapped and then see what power we end up with.
Can't see it being the engine but as a last resort I still have his engine from last year sat in the garage, just needs the replacement front cylinder head setup to match the back one

[skidlids]

Hopefully we will soon know if we are any nearer to rounding up some of the lost ponies.
The bike is now up and running on a almost complete different injection system, the only things that haven't changed are the fuel pump, the pressure regulator and the engine temperature sensor.
Now it just needs the PC3 USB fitting and then getting it set up on the Dyno

should all be done just in time for Cadwell