ESE's works engine tuner

[TZ350]

http://www.lortim.demon.co.uk/alpha/index.htm[/URL]

This is it a narrow disk valve set up, One engine used the half circle crank as the disk valve so the engine looked piston port but was disk valve. There is pics of about three versions of the engine here.

I think the crank web inlet idea would be a good way to get the carb out of the way but the crank webs on the GP are to narrow to be able to get enough port area.

If you had a contra rotating Disk valve with a jackshaft to reverse the direction with a bob weighted in this case retard (much like a bob weight centrifugal distributor advance on a 50s Morris minor or 70s ford escort)
I suppose only in reverse hence the jack shaft.
Ie the faster it goes the more retard.

That is an interesting idea, it would take a bit of work, and more time than I have, it would be interesting to see though.



My own approch also decreases the size of the inlet tract when the inlet closing point is reduced, this keeps the inlet tract gas velocity up.

I tried the RC Servo out and it opens/closes the valve OK and quickly enough but the RC servo does not automaticaly return to its neutral position like I thought it would.

So now I have to find a way of driving the servo both open and closed using a single switched output from the Ignitec. Probably use a Com-NO-NC relay and two RC Servo testers, one set to open the other set to the closed point.

With the RC Servo signal line connected to the Com of the relay and one servo tester connected to the NO and the other to the NC then whenever the Ignitec makes the relay change state the Servo receves a different signal and opens/closes.

[husaberg]

So now I have to find a way of driving the servo both open and closed using a single switched output from the Ignitec. Probably use a Com-NO-NC relay and two RC Servo testers, one set to open the other set to the closed point.

It was a joke but got me thinking don't windsceen motors have a memory functon of returning to initiation point I know it used to be an overcentre switch on the ancient one's but surely modern ones are a bit more trick.

At worst I think they could be the sourse of your relay.

Failing that have a look at the Jaycar site heaps of automotive curcuits and kits plus ideas.

Aditionally like I said earlier i have a rz one available for loan/lend.
but why can't use use a simple cable off the throttle and use a correct shaped ramp cam to get the right tipping point .

[wobbly]

Why all the shagging about with relays and RC crap - just stick a PV servo on the Ignitech that drives it open and closed, with loop feedback accuracy and simplicity.
The problem with connecting to the throttle is that in the situation where you want maximum effect, wide throttle/low rpm, it works the worst.
The best setup would be a 3D map for the servo in the Ignitech with PV position over rpm and TPS ( this is coming soon as I have been hassling them for over 12 months about it) but simply relating servo to rpm is way better than just a valve opening as you open the throttle.

[TZ350]

Why all the shagging about with relays and RC crap - just stick a PV servo on the Ignitech that drives it open and closed, with loop feedback accuracy and simplicity.

Saving that for pulling the slippery pipe.

Frits Overmars
A powervalve does not really give you real resonance power; it just prevents the pipe pulses from completely messing up the power curve at low revs. I expect a sliding pipe will make more low-down power.

http://www.pit-lane.biz/t1666p15-tec...ht=twin+rotary

[husaberg]

The problem with connecting to the throttle is that in the situation where you want maximum effect, wide throttle/low rpm, it works the worst..

I know I should be getting this but in a race bike as oposed to a roll on roll off situation and passing and acelerating moderatly etc you have in road situations .

The only times I can think off where you would have a wide throttle low rpm would be when...?comming out of a harpin is the only thing that springs to mind?

What am i missing I can follow the high rpm/low throttle sernaro for over run into corners chicanes etc .

I know from dataloging far better riders than myself S.F.A time is spent anywhere near full throttle even on open curcuits.
but where is the wide thottle opening low revs situations?

[Henk]

but where is the wide thottle opening low revs situations?

On an FXR (yes I know it's a diesel) out of just about every corner.

[husaberg]

On an FXR (yes I know it's a diesel) out of just about every corner.

Try the left side lever down by your foot, click down once instantly high revs low throttle opening although may result in crankcase venting on the diesel pig FXR

[Henk]

Correct gearing for MT Welly on a diesel pig gets you 2 gear changes per lap.
I've tried doing the Randy Mamola quickstep but it increased my lap times, on an FXR less is more when it comes to dancing on the shifter.

[TZ350]

Correct gearing for MT Welly on a diesel pig gets you 2 gear changes per lap.

Less is better, we are aiming for only 2 changes per lap too, rowing the bike around with the gear leaver only slows you down I recon.

[ajturbo]

Ok... as you all know i know HEAPS about nothing...

BUT i have just got the RG 50 going again..
I found out that if you clean all the jets, it can drink and breath fire....

So when is the next race, i will need to "test " it... as i do not want any of the locals knowing what i have in the shed...

Next the GT 125 twin will get the same treatment...

[husaberg]

Less is better, we are aiming for only 2 changes per lap too, rowing the bike around with the gear leaver only slows you down I recon.

Push lever up to go faster! Just kidding.

If you want to get away with less gear changes .
What about centrifical clutch ala ktm50 sx.
= no gear changes per lap always on the pipe.
Before I am flamed Its not like a Honda 50 clutch though more adjustable chainsaw.

[TZ350]

If you want to get away with less gear changes .
What about centrifical clutch ala ktm50 sx.= no gear changes per lap always on the pipe.

Could be good.


But the KTM looks like a slipper clutch with a single gear???? Am I looking at the right one?



I have seen dyno graphs of engines with variable drive, more or less on the power at whatever speed. The longest flattest rear wheel power spread I have ever seen. Might be worth looking at.

Last time out at Mt Welly Kel was able to do a few fast laps with the GP using only 2 gears, we are pretty close to getting a wide enough power spread for single gear laps.

So it would be a quick start, up through the gears to 4th and then drive on the throttle the rest of the way. With the overall gearing set so the engine is at its best on the two or three short straight’s that matter.

That’s the plan.

[Henk]

Ok... as you all know i know HEAPS about nothing...

BUT i have just got the RG 50 going again..
I found out that if you clean all the jets, it can drink and breath fire....

So when is the next race, i will need to "test " it... as i do not want any of the locals knowing what i have in the shed...

Next the GT 125 twin will get the same treatment...

You have two weeks to get the GT going. 19th June at Kaitoke.

[husaberg]

But the KTM looks like a slipper clutch with a single gear???? Am I looking at the right one?

If you are a KTM dad (the Clutch) is the bane of your life if you have a 08 or earlier model,
But man does it keep them on the pipe and puts the power down like you would not believe.
Yes the are one gear but they go 0km to 55mph like you would not believe and are adjustable for kick in speed and characteristics.with special cuped washers and flat washers.
Go to a MX race and watch them.There is generally very little lap time wise between the 50's and the 6 speed 65's

Would probably suit the a100 yb100 more than anything else.

I think they are crankshaft mounted clutch aren't they?

It could prove a bit disconcerting on overun unit you got used to it though.

AND yes I know they are competition parts but there is a adventer model almost exactly the same only std springs instead of washers

[richban]

If you are a KTM dad (the Clutch) is the bane of your life if you have a 08 or earlier model,
But man does it keep them on the pipe and puts the power down like you would not believe.
Yes the are one gear but they go 0km to 55mph like you would not believe and are adjustable for kick in speed and characteristics.with special cuped washers and flat washers.
Go to a MX race and watch them.

Would probably suit the a100 yb100 more than anything else.

I think they are crankshaft mounted clutch aren't they?

It could prove a bit disconcerting on overun unit you got used to it though.

AND yes I know they are competition parts but there is a adventer model almost exactly the same only std washers

I had an adjustable clutch in my Vespa. There are heaps of options out there. I do have a dyno chart somewhere and yeh it was flat. You do need to drag the rear break a lot to get them turning in. Bit of fun but sure doesn't feel like a proper race bike.