ESE's works engine tuner

**F5 Dave** · 15th August 2017, 07:37

Originally Posted by adegnes

Did anyone say blowback?

I will make up a bunch of different length carb spacers to see where that gets me.

Pah! You're still using a carb? Get outta here grandad. The scooter kids are clearly the real trail blazers. Next attempt; no head fitted.

**adegnes** · 15th August 2017, 08:06

Originally Posted by F5 Dave

Pah! You're still using a carb? Get outta here grandad. The scooter kids are clearly the real trail blazers. Next attempt; no head fitted.

If I inject fuel directly into the EGT fitting maybe I can get the pipe to work as a scramjet. Could do away with the whole bike and just ride the pipe. Would need a serious slingshot to get it into the "powerband".

But seriously.
I'll play around with intake length and jetting. If it doesn't lead me anywhere I'll put it on ice for a while and get that replacement valve.

The charge is pushed out of the carb with quite some force.
First this had me thinking that in no way will I be able to "stop" it with just a longer intake.
But thinking about it now, charge going in the right direction is probably pushed in with similar force.
Maybe there's not that much required to "tip the scale"?
I mean all I need is to stall the outgoing charge, not reverse it.

**oldjohnno** · 15th August 2017, 09:00

I guess it might be possible to use an intake tract long enough and small enough to let the engine pull itself onto the pipe. But then it'd lose a lot of power when it was on the pipe..

I can't help thinking the whole diskless thing is a solution to a non-existent problem. Sure, a reed valve is obstructive but I'm not convinced there's much to be gained by deleting the disk. Maybe with enough work a no-disk engine could be usable but I suspect it would remain compromised, and the necessary kludges to make it work could well be more complex than the disk itself.

**JanBros** · 15th August 2017, 09:34

Originally Posted by adegnes

I
I mean all I need is to stall the outgoing charge, not reverse it.

maybe fit a rotating disk with a cut-out between the carb and that big hole ?

I guess that would stall the outgoing charge

**WilDun** · 15th August 2017, 09:55

If you really want to know the answer to what is happening, ask Jan (I'm sure he has tried everything - and he isn't saying much) but then, that would spoil all the fun of finding out! If you just want to fool around with different possibilities, then carry on I reckon.
(BTW I like to try everything - well, I did a long time ago,- it didn't get me far, but it was a very enjoyable pastime).
I do like your enthusiasm and videos!

**Nath88** · 15th August 2017, 10:00

Originally Posted by adegnes

If I inject fuel directly into the EGT fitting maybe I can get the pipe to work as a scramjet. Could do away with the whole bike and just ride the pipe. Would need a serious slingshot to get it into the "powerband".

But seriously.
I'll play around with intake length and jetting. If it doesn't lead me anywhere I'll put it on ice for a while and get that replacement valve.

The charge is pushed out of the carb with quite some force.
First this had me thinking that in no way will I be able to "stop" it with just a longer intake.
But thinking about it now, charge going in the right direction is probably pushed in with similar force.
Maybe there's not that much required to "tip the scale"?
I mean all I need is to stall the outgoing charge, not reverse it.

Wacky idea but hear me out, what if you put a cone that expands outward from the carburettor so the air/fuel escaping the carb is pulled out even more, then attach another cone to the first cone, but the other way around, to 'bounce' the air/fuel back into the carb? Perhaps make it from plastic, variable length. You might need to lean the carb out a lot, since the air will be travelling through it many times.
I made a rudimentary drawing.

Click image for larger version.

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**Flettner** · 15th August 2017, 10:18

Mazda HCCI

https://youtu.be/WBkfOUaEcWM

**sidecar bob** · 15th August 2017, 10:23

Originally Posted by JanBros

maybe fit a rotating disk with a cut-out between the carb and that big hole ?

I guess that would stall the outgoing charge

You could drive it off the end of the crankshaft & experiment with the cut out timing to gain peak performance!!!

**peewee** · 15th August 2017, 11:33

heres a oil question. i had been using 6% oil in methanol and decided to try 9%. i didnt notice the engine run any better or worse so i thought of trying 12% next time. if nothing else maybe the bearing and cylinder bore might last a bit longer. what do you guys think of this idea ?

**crbbt** · 15th August 2017, 13:12

maybe the answer lies in the valveless pulse jet's "inlet"
sorta getting back to the origins of the expansion chamber here

or a tesla valve on the inlet

This might be making the motor increasingly a single speed motor however

I was really hoping this would work. maybe with a secondary, electronic throttle slide or something like Flettner's variable timing slide.

**F5 Dave** · 15th August 2017, 13:20

Originally Posted by Nath88

Wacky idea but hear me out, what if you put a cone that expands outward from the carburettor so the air/fuel escaping the carb is pulled out even more, then attach another cone to the first cone, but the other way around, to 'bounce' the air/fuel back into the carb? Perhaps make it from plastic, variable length. You might need to lean the carb out a lot, since the air will be travelling through it many times.
I made a rudimentary drawing.

No. No. I like it.
Then maybe fit a sparkplug that goes every 5 seconds to reduce the surprise of the inevitable

**Grumph** · 15th August 2017, 13:27

Originally Posted by peewee

heres a oil question. i had been using 6% oil in methanol and decided to try 9%. i didnt notice the engine run any better or worse so i thought of trying 12% next time. if nothing else maybe the bearing and cylinder bore might last a bit longer. what do you guys think of this idea ?

What oil, and are you dissolving it in a solvent before adding it to the methanol ?

**tjbw** · 15th August 2017, 13:31

Originally Posted by Flettner

Mazda HCCI

https://youtu.be/WBkfOUaEcWM

Another video about the Maxda HCCI engine:

https://www.youtube.com/watch?v=9KhzMGbQXmY

**peewee** · 15th August 2017, 14:33

Originally Posted by Grumph

What oil, and are you dissolving it in a solvent before adding it to the methanol ?

klotz benol 100% castor and klotz super techniplate which is 80% synthetic-20% castor. they are intended for petrol, methanol, nitro methane. they can be mixed to atleast 18% oil content when used in methanol or nitro. im pretty sure the super techniplate is what some rc fuel manufacturers like VP are using, although the msds sheet doesnt say specific name brands. it dissolves just fine but beyond 18% i think it gets to viscous and some kind of thinner oil is used, thats my understanding anyway. i just figured with the corrosiveness of methanol and nitro why not use more oil if the internal components last longer.