ESE's works engine tuner

[Flettner]

11500, as seen in a glimpse on my Tiny Tach.

[Wos]

11500, as seen in a glimpse on my Tiny Tach.

Here we are Flettner

Dont mind about values under 1500...this area is only hard to influence in hpi programm

Black curve is my rebuild from foto of your curve youve showed us

Red new one from me to have a try...think nothing dangerous...in opposite should be much healtier against deto and too much heat in cilinder

Other pic shows values of my new curv

Let us know if you had a testride 😉

Grüße Wolfgang

[wobbly]

I have proposed on the FB group EngMod 2T Users , the we conduct a shootout to design the best pipe for a specific application.
This will help users understand how to most effectively use the sim , as well as see others attempts at pipe construction.
It was decided to do something " different " , not the usual 125/250 cc things that have large tech history to draw from.

I have bought a KR150RR bare engine that is used exclusively in Thailand scooter drag racing.
Im having trouble finding out what the rules actually are , but know they run VP Q16 fuel.
Once I have the rules nailed down , I will construct a sim , and people can give it there best shot at designing a pipe to suit.

When we have a " winner " I will build the engine to the complete sim and dyno it.
Anyone here who has info on these engines or wants to get in on the shootout , join the FB group ( Im an Admin ) or PM me on here.

[diesel pig]

My Goodness, I just looked up this VP Q16 fuel, on VP's own site and it has to be the meanest or 'best" fuel I have come across outside of pure methanol.

[husaberg]

My Goodness, I just looked up this VP Q16 fuel, on VP's own site and it has to be the meanest or 'best" fuel I have come across outside of pure methanol.

https://vpracingfuels.com/products/n...ne-racing-fuel

[diesel pig]

https://vpracingfuels.com/products/n...ne-racing-fuel

I have to admit I stopped reading after the Q16. It did my head in.

[pete376403]

My Goodness, I just looked up this VP Q16 fuel, on VP's own site and it has to be the meanest or 'best" fuel I have come across outside of pure methanol.

Is that the same cocktail miser they use in Laos nightclubs?

[wobbly]

C16 is oxygenated to hell , is full of lead and has a good RVP - perfect for a race 2T
Methanol has an inherently higher effective octane when run @ 20 % rich and can create more power , but also makes you blind and or dead.
Just plain greed , like the Chinese bastards that cut NZ baby formula with melamine or some such shit , the CCP gave that company's CEO a dose of Methanol quick smart.
About the only thing they are good at.

[Flettner]

Wos
Had the twin pipe AG out at a VMX meeting yesterday, didn't get round to fitting the video camera, perhaps next time. The little bugger goes.
But still that weird 'flutter' in the pipes as it comes on song or should I say when it flutters you are buggered as it just wont climb into the power. It seems totally random as to when it happens. Sometimes its just seamless other times a bit of a bitch. Definitely worse when hot.
Hanging my hat on the new water cooled cylinder although I have a few other tricks to try first.

[Wos]

Wos
Had the twin pipe AG out at a VMX meeting yesterday, didn't get round to fitting the video camera, perhaps next time. The little bugger goes.
But still that weird 'flutter' in the pipes as it comes on song or should I say when it flutters you are buggered as it just wont climb into the power. It seems totally random as to when it happens. Sometimes its just seamless other times a bit of a bitch. Definitely worse when hot.
Hanging my hat on the new water cooled cylinder although I have a few other tricks to try first.

Hope i am on right way
What you discricbe...
For me a sign the temperatures in pipe are staying to long to cool. Then pipe stucks to long time between reso entry and being really on song.

Exhaust gas temp on new kurve shoud be generally litle bit higher and after power peak a lot warmer to gain overrev...

For overrev you need a hot pipe and after shifting gear these heat stays in pipe for a second...

This could help further to be well on song seamlessly after shifting

Give new curve a chance...think you will feel very quick if something is better ��

Grüße Wolfgang

[Wos]

Wos
Had the twin pipe AG out at a VMX meeting yesterday, didn't get round to fitting the video camera, perhaps next time. The little bugger goes.
But still that weird 'flutter' in the pipes as it comes on song or should I say when it flutters you are buggered as it just wont climb into the power. It seems totally random as to when it happens. Sometimes its just seamless other times a bit of a bitch. Definitely worse when hot.
Hanging my hat on the new water cooled cylinder although I have a few other tricks to try first.

Hope i am on right way 😉
What you discricbe...
For me a sign the temperatures in pipe are staying to long to cool. Then pipe stucks to long time between reso entry and being really on song.

Exhaust gas temp on new kurve is generally litle bit higher and after power peak a lot warmer to gain overrev...

For overrev you need a hot pipe and after shifting gear these heat stays in pipe for a second...



This could help further to be well on song seamlessly after shifting 😉

Cilinder on new curve is running cooler everywhere to avoid detos or other overheating problems cilinder ...piston etc.

Give new curve a chance...think you will feel very quick if something better 😉

Grüße Wolfgang

[Flettner]

The twin port AG has no issues with detonation, at all.
The only time Ive had an issue was when I left full advance until 7500 and even then it was bearly noticable ( but it was there ). Since changing to reducing advance from 7500 to 6500 it has gone completely. It is surprisingly detonation proof, even when hot.

The surging Im experiencing is not detonation, for example I can let it happen indefinitely and it does no damage to the engine, just makes it hard to ride.

[Wos]

The twin port AG has no issues with detonation, at all.
The only time Ive had an issue was when I left full advance until 7500 and even then it was bearly noticable ( but it was there ). Since changing to reducing advance from 7500 to 6500 it has gone completely. It is surprisingly detonation proof, even when hot.

The surging Im experiencing is not detonation, for example I can let it happen indefinitely and it does no damage to the engine, just makes it hard to ride.

.

You told us before that there is no problem with detos after reducing to 6500 😉

Thats why i kept this point as maximums end 😉

building a curve is always a gamble...puzzle that we always should start from save side.

15 degree after peak power nowdays with programmable ignition seems to me much "under state of the art "

Other rpm points on curve without dyno only to do with many testing rounds with slightly diffrent curves.

Buy the way flettner... have fun and good luck fiddeling out 😀 I love it 😉

[Flettner]

Wos, you may well be right, 15 degrees may be too much and I look forward to playing with the curve on a dyno at some point.
In the mean time that is not my main problem. I have to sort out what these pipes are up to. Last pipes had a large joiner between the mid sections, these do not. I dont remember this issue with the old pipes. These new pipes certainly make more top end power with more accurate press tool sections.

[Wos]

Wos, you may well be right, 15 degrees may be too much and I look forward to playing with the curve on a dyno at some point.
In the mean time that is not my main problem. I have to sort out what these pipes are up to. Last pipes had a large joiner between the mid sections, these do not. I dont remember this issue with the old pipes. These new pipes certainly make more top end power with more accurate press tool sections.

Old pipe ...new pipe...dosent matter...you are collecting experience...can do conclusions for next needs ...

In combination of changing ignition you can even get more insight whats going on... worth doing it before thinking about other pipe...


Mid section? Cilindrical part? Belly?

Do you work with fos pipe calculation?
Very good start and easy with jan bros excel

Belly diameter now...lengt from piston to end cone?

If i had to deal with your twin x

Would calculation do with 50 cc ...go with small diameter/ shallow pipe ...resonance length 8500...9000 wide powerband for enduro use...

If i am completely wrong...dear other better speacialists here...tell me...tell us!! top!

Grüße from enduro fellow