ESE's works engine tuner

[TZ350]

Power Curves

Which data will you take from the sims to feed the ecu with?

RPM, TPS VE and Fuel ...



Here is Fuel vis RPM and TPS.

There is a lot of good information to be gleened from the EngMod2T simulations that will be usefull in prepairing the initial Maps for the EFI.

[Grumph]

Is this it with the right cylinders
To tell you the truth i never knew it was a bucket. I thought it was a 125 and i posted the pics (you had sent them to me though for the chassis thread)
stilll think in this case the spine was to compromised with the reed engine, Neat bike though, who has it now?
Neat rear disk well before they were common on the tidlers.

In fact the barrel in the pics is a w/c Ag100 one - the current owner needs a YB100 piston to get it running with the right barrel. It's piston port too - not reed. Ports appear to be based on TD/TR layout.

Amusingly (to me) the frame is one of 3 built by the Westoby's - the other 2 had Rotax 125's in and ran in the NZ champs. You could therefore say they used a genuine race frame.....well predating the RS125 framed buckets.

All this shows really is that whatever you can think of doing in buckets in NZ, someone's probably done it before....

[rgvbaz]

I am under the impression that you are overcomplicating things in your thinking.

Quite possibly

Dave

[TZ350]

Chambers and my EFI stuff turned up today, only 4 days delivery time and it was Easter, how good is that! real good!



All the bits.



RF Shielded CPU



We checked and yes, the light you can see through the throttle body is equivalent to a 24mm carb.



Here are all the bits connected up on the wiring loom, real simple, real easy.



As an optional extra we got a wide band O2 kit to help with tuning on the dyno.

[chrisc]

As an optional extra we got a wide band O2 kit for tuning on the dyno.

This is awesome. Changing all those jets, the needle and inlet trumpets the other night on the dyno was such a hassle! When you can sit next to the bike with a laptop and change the fueling without anything mechanical... what are you going to do with all that time saved!?

[speedpro]

As an optional extra we got a wide band O2 kit to help with tuning on the dyno.

I'd check how that's going to last on a 2 stroke before using it.

[TZ350]

I have been told that as an optional add on, it can also have a mixture adjustment with exhaust temperature option. I am not sure how that works but hopefully it means we can give it a target ET and it will maintain it.

So if your exhaust gas temperature is lower than it should be, the mixture is made leaner, right?
Fine, except that EGT drops when the engine starts to detonate. Need I paint the rest of the picture?

The EFI unit turned up today and I am starting to get my head around how it works. Turns out, you give it a max exhaust temp and if its exceeded then the EFI self richens. There was no mention of a lower set point. Still won't react to deto and the subsequent drop in exhaust temp, but at least having an upper exhaust temperature set point is going to be much better than nothing.

[TZ350]

I'd check how that's going to last on a 2 stroke before using it.

I plan on looking in Pick-a-Part to see if there are any compatible ones to act as crash test dummys.

[Frits Overmars]

The EFI unit turned up today and I am starting to get my head around how it works. Turns out, you give it a max exhaust temp and if its exceeded then the EFI self richens. There was no mention of a lower set point. Still won't react to deto and the subsequent drop in exhaust temp, but at least having an upper exhaust temperature set point is going to be much better than nothing.

Enrichening when the EGT exceeds a certain level, is fine, as long as the base setting is rich enough without this EGT-enrichening and as long as the EGT-signal does not work in the opposite direction, i.e. leaning the mixture when the EGT drops below a certain level.

[rgvbaz]

I think, also taking the gear ratios of TZ's engine into consideration, a plot comparing rear wheel torque through the gears, with both curves geared to the same top speed would be quite handy. That one with the bigger area under the curve, wins.

Ok, I was a bit confused too so I did some maths (if your American that's: math). The pic below has two curves on a Driving force v road speed graph. I guess you would never have anything like that in reality but to show the point... Both the areas under each curve (well straight lines) are 18 grid boxes in area yet curve A can accelerate the imaginary vehicle to 35 Km/hr in 2.22 secs Vs curve B which takes 4.17 secs.

I used the equations out of John Bradleys book for most of my spreadsheet.




Dave

Edit: Cum time = cumulative time not...

[TerraRoot]

can't wait to hear all about how this efi kit works for you TZ, i've had it to the back teeth with ordering and changing jets

[TZ350]

Yep, that is a super sticky Hoosier, Chambers is building a sidecar and has been thinking about the dark side and CVT.

[chrisc]

I used the equations out of John Bradleys book for most of my spreadsheet.

Damn good book! I'm half way through now.

[Haufen]

Ok, I was a bit confused too so I did some maths (if your American that's: math). The pic below has two curves on a Driving force v road speed graph. I guess you would never have anything like that in reality but to show the point... Both the areas under each curve (well straight lines) are 18 grid boxes in area yet curve A can accelerate the imaginary vehicle to 35 Km/hr in 2.22 secs Vs curve B which takes 4.17 secs.

I used the equations out of John Bradleys book for most of my spreadsheet.




Dave

Edit: Cum time = cumulative time not...

Thanks for that, Dave. I think I missed something. I will think that through. What happens if you take an acceleration vs speed graph with the same area instead?

[F5 Dave]

. . . (if your American that's: math). ...

If you are English that is 'You're'. Oh you are? How embarrassing.