ESE's works engine tuner

[ief]

Thanks, guys, I think I have enough info now to get going on it.

Only thing I doubt is the pin offset Wob mentions and the deckhight (latter will be different engine to engine anyways) The RZ has no pin offset, that all I know.

I'm pretty sure I have an oem banshee piston laying around somewhere so will measure that to make sure. If I find it that is.

[41juergen]

Only thing I doubt is the pin offset Wob mentions and the deckhight (latter will be different engine to engine anyways) The RZ has no pin offset, that all I know.

I'm pretty sure I have an oem banshee piston laying around somewhere so will measure that to make sure. If I find it that is.

At least my Woessner pistons for my RZ have an offset, here only 0.6mm...

[wobbly]

The 2mm pin offset came from Tom Turner and was measured on stock pistons for Banshee - not RZ.
The timing difference is minimal anyway.
The deck height came from a guy who has built many Banshee engines, so I have no reason to doubt his measuring.
But as it stands the port heights are given from TDC, so the deck position is irrelevant.

Its been my experience that if done well, an aircooled on Methanol is quite capable of better performance, with no power fade,over a
watercooled on petrol.
Only caveat would be running 110+ octane race fuel, then the advantage tips in favour of the watercooled.

Re Ignitech advance curve for Lef16 - sure I can give you exactly what the curve should be if I spent 1 1/2 days constructing an Engmod sim file
with every tiny detail of the engines spec.

[peewee]

why would Husqvarna aka ktm use a counter balancer when there was hardly any vibes to begin with, atleast in the 2wheeler frames ? I thought they were pretty smooth compared to the other bikes I have. even with the 300 barell I didn't notice any significant increase in vibration

[Peter1962]

why would Husqvarna aka ktm use a counter balancer when there was hardly any vibes to begin with, atleast in the 2wheeler frames ? I thought they were pretty smooth compared to the other bikes I have. even with the 300 barell I didn't notice any significant increase in vibration

Not so important on an MX bike, but for enduro and even more for trail riding in the woods this will enhance the comfort of the driver. And I think this engine will now also enter the karting market.

[41juergen]

As I need new bearings for my rear wheel I think about using ceramic ball bearings. Of course the much higher costs will not really justify the gain in less friction, but as a "nice to have" .... Has anybody experience with this type of bearings, are they durable for more than a season? Can I use them also in a street bike?

[cotswold]

As I need new bearings for my rear wheel I think about using ceramic ball bearings. Of course the much higher costs will not really justify the gain in less friction, but as a "nice to have" .... Has anybody experience with this type of bearings, are they durable for more than a season? Can I use them also in a street bike?

Ask speedpro what he thinks of ceramic bearings

[41juergen]

Ask speedpro what he thinks of ceramic bearings

Jeep, I remember his picture. But wasn't that in the engine?

[wobbly]

I have used ceramic mains in a race engine for 4 seasons and had no issues at all.
The dyno said a gain of 0.6 Hp in 47.8 Hp, but that was over roller mains as used by the factory teams ( that we found were unacceptably unreliable so ditched them
after wreaking two engines ).
But wheel bearings I am not sure about - in that you will have to have lip seals on them anyway,and that produces way more rotating friction than the bearing itself.
Having said that I know of several riders that are adamant the bike will "freewheel " into the pits way faster.
The MicroBlue bearings with polished races and steel balls are very good,and alot cheaper than the ceramic units from the same company - and i use them in classes where
ceramics are not sanctioned.

[Bert]

I have used ceramic mains in a race engine for 4 seasons and had no issues at all.
The dyno said a gain of 0.6 Hp in 47.8 Hp, but that was over roller mains as used by the factory teams ( that we found were unacceptably unreliable so ditched theM..........

Still to this day suffer sore neck from the high side.

[wobbly]

That looks like a ceramic outer race as well as balls that has failed ?
What brand sells those, never seen them before.
The main advantage of ceramic balls is the reduction in inertia = less skidding on the race/cage,I dont see any reasoning in a ceramic race ?
I have used MicroBlue sourced ceramic ball setups ( balls only are ceramic in polished and treated races, with plastic cages ) in literally dozens
of engines and never had a failure.
I would normally change mains every year in an engine that regularly gets raced, but as I say the TM125MX engine that won
3 straight titles = 36 + practice/heats/finals per year - ran for 4 years solid including literally hundreds of dyno runs, and the mains still looked like new, on Elf 909 at 20:1.

[Bert]

That looks like a ceramic outer race as well as balls that has failed ?
What brand sells those, never seen them before.
The main advantage of ceramic balls is the reduction in inertia = less skidding on the race/cage,I dont see any reasoning in a ceramic race ?
I have used MicroBlue sourced ceramic ball setups ( balls only are ceramic in polished and treated races, with plastic cages ) in literally dozens
of engines and never had a failure.
I would normally change mains every year in an engine that regularly gets raced, but as I say the TM125MX engine that won
3 straight titles = 36 + practice/heats/finals per year - ran for 4 years solid including literally hundreds of dyno runs, and the mains still looked like new, on Elf 909 at 20:1.

Out of high speed milling machine. Not doubting ceramics are the go. I can believe your figures from what I experienced in terms of free rolling.
Key is to make sure no side / lateral loading. I slightly fked up the machining of the primary drive spacer, loading onto the core of the bearing. Race collapsed then chomp chomp... Sudden stop and over the handle bars...

[Flettner]

why would Husqvarna aka ktm use a counter balancer when there was hardly any vibes to begin with, atleast in the 2wheeler frames ? I thought they were pretty smooth compared to the other bikes I have. even with the 300 barell I didn't notice any significant increase in vibration

Perhaps not just vibration? With the 450 4T's they use a counter rotating ballance shaft with fairly heavy counterweights, these bikes turn way better than they should. I think some of the crankshaft gyroscopic effect is offset by the counter shaft. Could be wrong, but I think as the crank gets bigger the effect is felt more by the rider (ride a TT500 and see what I'm saying). That's why I've started to build (but stopped due to cost to finish) the 360 reverse rotation crank engine, also happens to be variable RV and EFI.
But as I said earlier on another thread the EFI, variable RV F9 is going so well I'm keen to get the 360 up and running now. Perhaps 70HP is not a dream after all
I'm going to compromise the design and just run a throttle cable straight to the RV slide, without the expensive ECU fly by wire control. First up anyway, if it works well then I'll save my pennies.

[TZ350]

Well I got to try the small low speed injector in its new location. Totally changed things, it ran absolutely rat shit. Had to double the map numbers to get it to run at all at the low end. The injection-end timing had to be totally different too. A bit of re mapping work to do now, hopefully it being so different is a good thing.

[Frits Overmars]

Well I got to try the small low speed injector in its new location. Totally changed things, it ran absolutely rat shit. Had to double the map numbers to get it to run at all at the low end. The injection-end timing had to be totally different too. A bit of re mapping work to do, hopefully it being so different is a good thing.

...........