Texas Two Step Taco

teazer said:

Hopefully that will eliminate the stutter at each gear change. Looks like a simple ground through the button should do the job for the Zeeltronic.

Are you using resistor plug caps or fully suppressed leads? I did notice that on the Zeel website that they mention the need for suppressed caps


BTW, Love those Pingel buttons/switches.

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Yes I am suppressed...did I tell you that I am also a sentimental fool? Have you smelled Q16 with a Paris Hilton tuning at Redline?

Well after the 8.36 with the 20:1 maxima 927 castor I remembered that John said “Richer” at the track and decided on the 290 jet instead of the 300 and we tuned for the Q16. Knowing that I have the advance retarded to 17 at 9k I felt like we were safe. I looked up and this kid road by me like this and I smiled. An omen?





So that is how we got to the Paris Hilton with q16...and me screaming YEEE Hawww in fourth gear on the rev limiter crossing the finish line. To have a friend named Rich is to be rich indeed. Thank you for always teasing!


If you watch in that video you will see Dave on the H2 for the first time racing Joseph on the meth quad. Joseph ran a 6:12 that night against Dave.

When I got home that night Zeke said, “dad most will spend a 1000 bucks to gain a .10 at the track. You just gain seven tenths for a lot less.” I smiled and said, “I have Team Old age and Treachery!”

Dan from the Philippines texted me about the q16 last night. His bike weighs 125 lbs and he has done 7:36 in the 1/8th. Told him that we were going to a skinny tire to remove 4lbs off the rotational mass. Here is a before and after of his bike. Look at that massive chamber!!!! That bike is inspirational.

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I think I'm almost as thrilled as you are with the performance Pat

I'm sure there's more in it, enough to get you well into the sevens at least. Keep in mind that a dyno tune will only get you into the ballpark, and it's a pretty big ballpark at that. I'd plan on making quite a few runs at the strip to home in on the best jetting and timing settings. Good luck and good work!

John Murray said:

I think I'm almost as thrilled as you are with the performance Pat

I'm sure there's more in it, enough to get you well into the sevens at least. Keep in mind that a dyno tune will only get you into the ballpark, and it's a pretty big ballpark at that. I'd plan on making quite a few runs at the strip to home in on the best jetting and timing settings. Good luck and good work!

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Thank you John! I hope to get to shake your hand one day and tell you thank you in person. Now let’s see if we can beat Zeke’s 996 Ducati. The most fun on two wheels! Bultaco!



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Here is our 8.08 in the 1/8th run vs a 4.5 second nitrous Busa...you have to train with competition that will make you faster.



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You gotta let the Busa guys win one occasionally, it's good for their self-esteem..

How many milliseconds should we start with for the kill time?


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Got the Zeeltronic shift kill wired in.



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I would start with 70ms and go down from there if shifting is still relatively smooth. A lot of it will be down to your particular transmission setup. I read somewhere that 50ms is "standard".

Sonrier is correct. A modern transmision should be around 50ms and one with semi-auto cut on teh dogs will be less. Old clunkers with excessive clearances and large engagement dogs take a little more time to get into bed with their next partner. GT750 with early style dogs too around 70ms . Much less than that resulted in the odd missed shift.

Thank you! 70 ms it is. We will give that a try!


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It's just a place to start. Try it there and you can always adjust it up or down as required.


BTW,
How on earth do you manage to ride it with the upside down clipons so close to the seat so you can't get your weight down and forward? On mine, I was fine with high bars but drag bars were unrideable -pain level was too high. Clubmans bars were fine though because they allowed me to get my shoulders into a less painful position. On teh next one, I may have to fit teh bars on an extension in front of the forks to stretch out enough.

teazer said:

It's just a place to start. Try it there and you can always adjust it up or down as required.


BTW,
How on earth do you manage to ride it with the upside down clipons so close to the seat so you can't get your weight down and forward? On mine, I was fine with high bars but drag bars were unrideable -pain level was too high. Clubmans bars were fine though because they allowed me to get my shoulders into a less painful position. On teh next one, I may have to fit teh bars on an extension in front of the forks to stretch out enough.

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With a big grin and my face shield open...


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Happy New Year Elf is on the shelf. Elf 909 HTX two stroke oil. I buy with conviction! Thank you John!


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Alex demonstrates how to launch. Bill is smiling and gracious. You're a lucky man, Pat.

John Murray said:

Alex demonstrates how to launch. Bill smiles and is gracious. You're a lucky man, Pat.

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Don’t leave out the rest of team old age and treachery...yes and I am very grateful for y’all and to be the court jester of our team.

Here is to being better and faster in 2021! Cheers! 7.77 for Bill and Alex will fall this year! They are at the top of their game!

My daughter says I talk too much about my Bultaco so I took her out to dinner. She took this picture.


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I had not caught up with BB's latest changes to EFI. That's a big change. and 780s on motor is no slouch. That's impressive.

teazer said:

I had not caught up with BB's latest changes to EFI. That's a big change. and 780s on motor is no slouch. That's impressive.

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He has been on the dyno extensively with the EFI. Fun to watch...he is in a different league. Helps everybody. Embodies the teazer spirit! Let’s you learn from your mistakes!

So Frits Overmars commented on this picture of an expandable two stroke chamber on Facebook but it and it needs to be saved and archived on a forum so I am adding it here. The following is his comment: I've posted the following text before, but judging by the above reactions not many have read it, so here it is once more:

There are several options in lengthening an exhaust pipe. You can move the end cone, or you can lengthen the header, like a trombone.
The gas pressure generates a force that is proportional to the cross section area of the moving part and proportional to the pressure difference at either side of that area. For a moving end cone this force can be up to 4 times larger than for a sliding header. That is one reason to go for the trombone system rather than the moving cone system.

The second reason: sealing. The circumferential gap that has to be sealed, is three times shorter for the trombone system. That means three times less leakage and three times less friction.

The third reason: say you wish to lengthen the total length of the pipe by 10 %. If you do it by moving the end cone, you will also enlarge the pipe volume by a little over 10 %.
But in a good pipe configuration the header length is about 1/3 of total pipe length, so in the trombone system, lengthening the pipe by 10 % will be done by lengthening the header by about 30 %. That gives a far greater variation in the pipe's Helmholtz frequency than a 10 % volume change.

It is true that the length percentages of all pipe components should be in a rather fixed relation to each other. Varying the lengths of all components by the same percentage would be the theoretical optimum, but that is not feasible.
Lengthening the belly will disturb the optimum relations, as will lengthening the header. So the pipe in its lengthened version will not be the optimum for the low resonance rpm dictated by the length. But it will be a hell of a lot better than using an exhaust power valve that spoils the 180° effective exhaust timing, necessary for true resonance.
And a pipe shortened beyond its optimum may not show the optimum length relations between its components either, but it will be a lot more effective in overrev than artificially raising the exhaust gas temperature by retarding the ignition, or by weakening the mixture strenght through closing a power jet, which has the disadvantage that not all inhaled air is used for combustion.



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So much info in this thread. I don't say much. I just read and learn LOL.

Maritime said:

So much info in this thread. I don't say much. I just read and learn LOL.

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Zeke was telling me how impressed he was with what we have done with the taco. I just hope this information is carried forward to generations. How a diverse group of people can transcend politics, race, religions, geography, et el to accomplish a common productive goal of going faster on a slow motorcycle.


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