ESE's works engine tuner

[WilDun]

How about a comedy thread? plenty of talent here!
It all reminds me of the girls at school who were either 'bitching' or 'not speaking'.

[ken seeber]

Turns out that the vast majority know what we want and what we don't like .
Mission accomplished?

[teriks]

Turns out that the vast majority know what we want and what we don't like .
Mission accomplished?

Lets hope so

[seymour14]

Lets hope so

I personally like to read about and see TZ's bikes, what this thread was all about until it got hijacked way back when.

How many people here race Buckets?

Ironically, and I do mean ironically, I believe Sidecar Bob has...

No disrespect TZ, but you must wonder some days where the "flash mob" came from...

Anyway, each to their own, rant over.

[jasonu]

I personally like to read about and see TZ's bikes, what this thread was all about until it got hijacked way back when.

How many people here race Buckets?

Ironically, and I do mean ironically, I believe Sidecar Bob has...

No disrespect TZ, but you must wonder some days where the "flash mob" came from...

Anyway, each to their own, rant over.

Did someone say flash mob???
https://www.youtube.com/watch?v=AqnORZOxL98

[FastFred]

When I get back from Vegas I will post pics of all the engine mods that will be of interest to the 2T people here.

Looking forward to seeing them.....

[WilDun]

I personally like to read about and see TZ's bikes,

How many people here race Buckets?

Anyway, each to their own, rant over.

I don't race, but only because I can't even throw a leg over the seat and if I could and fell off that would be curtains for me! ( I fell over in Bunnings carpark one day, ended up in hospital and nearly karked it) but ....... Still doesn't disqualify me from being interested though!!
Flettner, I can't contribute much of course but I will do what I can, hopefully enough to to pad things out occasionally.

[Sketchy_Racer]

So once again the actual facts are completely ignored and personal abuse takes centre stage.
The whole bike is completely Pre 82 Post Classic Junior legal.
The chassis is a Frepin, designed and first built by Peter Pinion ( in the pic ) and Fred Mclean in 1978.
I have two of the originals here, I jigged off the 350 version, and spent many hours running the design thru FEA and improved
the torsional rigidity to be as good as the best chassis of the day being a Bimota YB3, but its 10Kg lighter.
Unlike the rest of the world we must run period forks - so the legs are off one of only two period bikes with 41mm tubes - an 82 Suzuki GS1000 GK.
They cost $50 off ebay, then fitted with Maxton hi tensile thin wall tubes off ProTwin SV650.
Internals are free, so I fitted 2006 GSXR600 cartridges and KSS did the conversion to NIX20 with all Ohlins stacks and Com on the left and Reb on the right.
We are allowed up to 430cc in two stroke junior, so its a TZ350 - 3G3 six port with a 58mm Banshee crank and Blaster 60mm pistons = 400cc.
I welded CR125 reeds onto the back and fitted an inlet port divider with 2 extra boost ports - externally the same as a Kenny Roberts OW31.
Lectrons are legal flat slides for the period, so it has 40mmHVs.
When I get back from Vegas I will post pics of all the engine mods that will be of interest to the 2T people here.
But just so there is no chance of confusion, here is the crank power sim output - so take off around 12% and you get the final dyno rear wheel power of 82.81
from the video - exactly as it should be.

https://www.youtube.com/watch?v=p8ZJCPXAIyA

PS - if I wanted the thing to go F2 the swingarm would be 100mm longer and have slicks, add a speedshift and then Dennis would do 10s IMHO.

That bike is pure beauty. A real race bike that I'd imagine takes quite the skill to ride to its potential.

[speedpro]

That bike is a thing of beauty.

Whip the engine out and throw a watercooled MB100 in it. Tell me I'm not the only one thinking how it would go in bucket racing.

[jasonu]

That bike is a thing of beauty.

Whip the engine out and throw a watercooled MB100 in it. Tell me I'm not the only one thinking how it would go in bucket racing.

Well it is short enough (wheelbase wise).

[F5 Dave]

That bike is pure beauty. A real race bike that I'd imagine takes quite the skill to ride to its potential.

Ahh go on, you'd be just itching to try beat an old sparing partner on the same tackle. Go-on, there must be a rich American benefactor who can sponsor Sketch onto an identical bike

[Sketchy_Racer]

Ahh go on, you'd be just itching to try beat an old sparing partner on the same tackle. Go-on, there must be a rich American benefactor who can sponsor Sketch onto an identical bike

Well I would be lying if I said I didn't feel like there was a bit of unfinished business but mostly I'm just jealous of Dennis getting to ride that awesome bike! Back when race bikes were race bikes and men were men. No silly "rider aids"!

[Lightbulb]

We have been doing some more tests again. This time we were looking at rpm changes from one cycle to the next. Also tested two different pipes compared to the last lot of tests that were done. In addition, this time the frequency of the monitoring was increased from 1 mhz to 16mhz for the hall effect sensor in the engine back plate as it looks at the crank pin going past. We added a thermocouple onto the header pipe, but the 1st one came loose so changed the connection type on the second pipe. Also did some more analysis when the engine was stopping at the end of the run. The most staggering find was the rate of deceleration when the fuel was shut off and was slowing down. At 35 K the rate of slow down due to the prop load is a staggering 621 rev change to the next, so this occurred at only 0.0017 seconds, that is a rate of 355622 revs per second. So the variations from rev to rev at 200 to 400 rpm change is definitely very real and well inside the possibilities of the rate of deceleration.
The other part that was and still is very confusing is the 2 pipes. They are cnc made from bar stock with very similar volumes, the std performance pipe
has stinger of 4.5mm the slow pipe has stinger of 4.6mm , the slow pipe is 1.6 mm longer, but is 1600 to 1700 rpm slow. Only could do 38100 rpm, compared to 39700 of the std pipe. The header temp on the slow pipe is around 230 to 235 C, unsure of the header temp of the 1st run.
The graphs show the rpm on the bottom and pipe temp in the upper. top graph is temp/time, the lower graph is rpm/time
The crosses on the lower graph represents the trigger points with the hall effect sensor at tdc. We have not added the other hall effect sensors to monitor the quadrants just yet.
Neil

[TZ350]

That is very interesting, very impressed by how you are finding ways of making meaningful measurements with an engine that revs to 38K + rpm.

[adegnes]

That is very interesting, very impressed by how you are finding ways of making meaningful measurements with an engine that revs to 38K + rpm.

+1


............