ESE's works engine tuner

**Flettner** · 16th September 2015, 15:02

Originally Posted by Haufen

I don't think so. HCCI has always been a low load combustion process only.

I don't think for a moment that the Ryger's HCCI is like those being discussed here, Ryger has found a way of controlling this HCCI after blowdown becomes not enough time in a normal twostroke. I think spark ignition until this happens, then spark plug/system is just along for the ride.
All of this requires a high pressure transfer system to still push fuel air up into the combustion chamber, at elevated cylinder pressures.

**peewee** · 16th September 2015, 15:53

hey guys slowly but surely i still been plugging along on this engine when time allows, although it seems like im near a snails pace. i was wondering on the aux exh passages , if you guys have thought of any clever gadgets to stick in there and use for a gauge to keep the passage width correct in relation to the window flow width ? i dont want to make the passage to wide and have a mistake i cant fix

wob im still sorting out some of the sta, specifically the C port but ill let you know when i think ive got it somewhat correct. im working on trying to figure out how to maintain atleast about a 1:1 ratio from entrance to exit or even a slightly smaller entrance as this should allow the window area to be a bit bigger. it seemed simple at first but its proving to be just the opposite. basically trying to keep a duct area near the same from beginning to end when it has multiple radius turns on three of the walls and goes from sqaure entrance to rectangle exit. i have a feeling it may take several attempts with epoxy to get it anywhere near correct

**wobbly** · 16th September 2015, 16:15

The duct CSA isnt near as important as the entry geometry.
Here is a KZ10B that I modified to the red line - way more power, and looks like you need to get more
of a deeper radius into the Aux rear wall.

**peewee** · 16th September 2015, 16:34

yes it needs a deeper radius but before i made it to large i figured i would ask if you guys used anything special (like a piece of wire etc) to gauge the width or do you just eye ball it ?

**jonny quest** · 16th September 2015, 17:59

I thought the karting Ryger homologation papers were supposed to be out by now?

**J.A.W.** · 16th September 2015, 18:25

Originally Posted by SwePatrick

It´s all relative to pistonspeed.
An F1 engine doesn´t have that much of a pistonspeed to brag about.
Take an 500cui top fuel engine at 10000rpm as an example, there´s speed for you

That is what is known as a 'flash' reading.. lasts for a matter of seconds & only a few turns of the crank..

F1 & 800cc Moto GP were spinnin' at up to ~19,000 rpm, lap after lap..

F1 mills have toned down the rpm since going high-pressure forced induction for power instead, but lazy N/A 4Ts really have to rev
their tits off to do any useful work - with their inherent 3 dick-around down-strokes - for every power event..

**jonny quest** · 16th September 2015, 18:38

The faster you spin the motor the less chance it has to detonate

**adegnes** · 16th September 2015, 20:42

Originally Posted by peewee

yes it needs a deeper radius but before i made it to large i figured i would ask if you guys used anything special (like a piece of wire etc) to gauge the width or do you just eye ball it ?

I use a piece of solder and "conform" it to the outer wall with a pick to get the radius. To meassure the duct width/height I use moddeling clay, pushing it into the port from inside the bore. Wont work if the duct is larger than the port, or tapered out.(guess you could just push it the other way...)

**breezy** · 16th September 2015, 21:03

Originally Posted by Haufen

I don't think so. HCCI has always been a low load combustion process only.

maybe this is where a breakthrough has been achieved in controlling the hcci .

**adegnes** · 16th September 2015, 21:12

Originally Posted by adegnes

Re the Ryger.

...
- It runs on exhaust gas mixed with melted piston from deliberate runaway deto, one small port to keep the heat at critical levels, and to keep the melting piston from spilling out into the pipe all at once, the stinger nozzle is actually inside the port?
...

My version of HCCI. The bastards stole it!