ESE's works engine tuner

[jasonu]

Who was it that did a fair amount of races on the BSL? IIRC it was an Aussie and he did a lot of bitching about it 'ruined my career' and such. But maybe I am thinking of something else.

[F5 Dave]

From my own pics from the show. + the ally one that was built earlier. Kevlar one is sitting about 2k from here.

[TZ350]

EngMod2T

A small trick I use is this: say I see the value of delay at 10500 is between 10 and 12. I limit the Y-axis between these two, and set the X-axis to start at 10500. It says the exact value right on the Y-axis scale.

Basically, now that I think about it, while you keep using Prediscribed, there is no need for too great an accuracy, since you are only looking for differences between modifications.

TeeZee, yes best fit curve is fine for combustion data, its the value trend that is important. More especially when you are simply doing pipe performance tests, as the combustion characteristic will remain a constant.

Thanks for the tips, got that part working now.... this is how I went about it.



To select the file and range, I had to enter both Y (data range) and X (rpm) values or the screen screwed up.



Selected the variable I wanted to graph.



And there I have it, an expanded chart for more accuracy.

And I have finaly found the list of definitions.

RPM Simulated engine rpm
P-av Average engine power over the last three cycles (kW)
Torque The engine torque related to P-av. (Nm)
Tex-AvC Average temperature in center of exhaust (ºC)
Tex-AvT Average temperature at transducer position in exhaust header (ºC)
Power Power per cylinder (kW)
Imep Indicated mean effective pressure per cylinder (bar)
Bmep Brake mean effective pressure per cylinder (bar)
Fmep Friction mean effective pressure (bar)
Dratio Delivery ratio per cylinder
Purc Purity of the mixture in the cylinder at exhaust port closure
Seff Purity of the mixture in the cylinder at transfer port closure
Teff Trapping efficiency per cylinder
Ceff Charging efficiency per cylinder
BSFC Brake specific fuel consumption per cylinder (kg/kWh)
TC-av Average maximum cylinder temperature per cylinder (ºC)
TUBmax Maximum unburned mixture temperature per cylinder (ºC)
MaxDeg Degrees after TDC where maximum cylinder pressure occurs per cylinder
Timing Ignition timing (ºBTDC)
Delay The user prescribed delay period in degrees (deg)
Durat The user prescribed combustion duration (burn period) in degrees (deg)
TAF Trapped Air/fuel ratio
VibeDelay The calculated delay period for a turbulent combustion model (for the prescribed combustion model it is the same as "Delay")
VibeDurat The calculated burn period for a turbulent combustion model (for the prescribed combustion model it is the same as "Durat")
VibeA The calculated Vibe A value for a turbulent combustion model (for the prescribed combustion model it is the same as prescribed)
VibeM The calculated Vibe M value for a turbulent combustion model (for the prescribed combustion model it is the same as prescribed)

The units are standard SI units: kg, s, Nm, kW etc.

[husaberg]

Who was it that did a fair amount of races on the BSL? IIRC it was an Aussie and he did a lot of bitching about it 'ruined my career' and such. But maybe I am thinking of something else.

I know you don't mean this guy.
but I guess he may regret this decision to wear the misses undergarments on this occasion. Or maybe not.

[wobbly]

The Oz was Willis, but I fail to see how BSL ruined his career.
He got onto the Modenas team working for Kenny, when the BSL was stopped from racing by Dorna..
He was the quickest KR3 rider, so there were other reasons he didnt get to stay in 500GP.

[F5 Dave]

Well it looks like I'm schmozzled with a 16x19 small end bearing. All the ones I've found in my spares drawer have been 16x20 or 15x19. Might have to make some bushes which is a pain. Can't stretch to another rod with other bills atm.

[jasonu]

The Oz was Willis, but I fail to see how BSL ruined his career.
He got onto the Modenas team working for Kenny, when the BSL was stopped from racing by Dorna..
He was the quickest KR3 rider, so there were other reasons he didnt get to stay in 500GP.

Thanks for the reply.
The career ruining thing was something I vaguely remember reading some time ago. Maybe/probably thinking of someone else.

[Bert]

Well it looks like I'm schmozzled with a 16x19 small end bearing. All the ones I've found in my spares drawer have been 16x20 or 15x19. Might have to make some bushes which is a pain. Can't stretch to another rod with other bills atm.

you could always sell the piston to me to add to the collection for the future (took my a long time to sort out that YZ100's would fit my TZR project).

what about a crowded roller (as getting 1.5mm roller pins is easy enough) and packing washers (what was it: grown men cry.. Bell..)?
or could you pull a 15*19 apart and put in larger rollers (the cage maybe be slightly off centre as a result but...; just a thought don't shoot me down).

or machine up some small end - end caps (that act as spacers/bushings as well) (Woobly/Fits blow-by preventers) and taper/step the ends of the pin to match it all up nicely and provides some meat to the bushes??
again don't shoot me down; just some of the crazy ideas that came to me to resolve my issues.

[TZ350]

... what about a crowed roller (as getting 1.5mm roller pins is easy enough) and packing washers (what was it: grown men cry.. Bell) ...

1.5 mm crowded rollers with end washers and assembled up using a short dummy pin is my bet.

[wobbly]

16 by 19 isnt a standard size in any of my references.
But crowded rollers in a small end is going back to McCulloch chainsaw days, they all rub like hell on each other and die under any load
that a caged roller setup would live happily with all day.
Must be another way??

[F5 Dave]

Thanks for looking guys, I'll have to go down the bush path. There is a heap of room in between the pin bosses so I would have had to run some thrust washers in the Yam piston anyway (found out the hard way putting a RD piston in my MB50 back 1990). So there is room for bushes & I already have some scribbled pictures moments after the piston arrived. Bit of a pity to be doing some intricate engineering on what was hopefully going to be an interim solution & esp while I'm a bit broke atm. Taking my eye off doing new cases.

[F5 Dave]

quick question for the pipe builders: Stinger tube? Trying to think who would carry off cuts of thin wall steel tube with an ID of between 19-20mm. I kinda want to get it bent too. Too small for muffler shops to carry or bend.

[speedpro]

If I need thin light tube I make it myself from .8mm mild steel. I smash it into shape on a bar with the correct OD. I cut it on a guillotine so the edges are nice and straight, make it a good tight fit, and seam weld it while it's still on the bar. Quite often it needs a good hammering with a ball pein hammer to unjam it. Hammering it with a rubber mallet gives it a nice smooth finish. For stinger tube I've got some mandrel bends of 20mm ID from a custom motorcycle exhaust place here in Auckland. The walls aren't so thin but it's OK.

[koba]

Does anyone know the crankcase volume of an MB 100??

I will eventually measure mine but its a real prick to sort out and if anyone has an easy answer they are willing to share I'd be keen to know.

[koba]

quick question for the pipe builders: Stinger tube? Trying to think who would carry off cuts of thin wall steel tube with an ID of between 19-20mm. I kinda want to get it bent too. Too small for muffler shops to carry or bend.

I've seen handlebars used in a section of stinger by a respected local racer/tuner...