My 1991 Talon TSi Compound Turbo AWD

[cRiPpLe_rOoStEr]

Originally Posted by Logic

IF there was a way to create a VERY large spark (or 4...) one could do away with it..??

Would it be out of question to use 2, or even 3, spark plugs. I guess you know about Bajaj using 3 spark plugs in the Pulsar 200.

[pgfpro]

Originally Posted by Logic

I came up with that means of optimizing valve/chamber shape (Tuliping. Thx freebeard) ages ago while gas flowing my Alpha Giulietta 2L head.
I miss that car! If I knew then what I know now..!

I'm getting my head around what you have said (and not! ) in the rest of your reply.
We'll chat more on that privately. But we are heading into territory where a picture (and gesturing) is worth a thousand words... (in a trustworthy ear!)

IIRC your compression ratio and AF ratio numbers aren't much different!? Hats off on that!

If I understand things correctly (with almost no research) the pre-chamber is basically about creating a very big 'spark' that lights more AF up faster, at a better crank angle closer to TDC, by setting fire to that separate mixture at a/the 'timing advance' that would otherwise be unworkable?
ie:
IF there was a way to create a VERY large spark (or 4...) one could do away with it..??

Hydrogen:
I NB that the previously discussed copper plating that creates a bit of H, more during/after the main combustion event, does not suffer from that drawback in a pre-chamber!

There are a good number of other possibilities for getting some 'free' H2 or Ozone type radicals out of an engine.
eg: A constant but separate (dioded) Ozone producing voltage (circuit) on the spark plug.
I'll get back to you on that when more of my vast multitude of ducks are in a row!
(I'm researching senescent cell clearance for my Mom (urgent) too atm, which is taking a lot of my free time)

Lots of good stuff here, thanks for the reply. In short what the pre-chamber does is makes its chamber an A/F rich area. I suspect the pre-chamber A/F during light load FE mode is around 16:1 to 20:1. The normal combustion chamber A/F is at 30:1 plus. Without the pre-chamber even with my race extremely high energy ignition system the engine starts to misfire above 20:1 A/F.

The second major thing the pre-chamber does is it creates a very powerful flame torch. This is due to its shape. The torch that enters the normal combustion chamber covers a lot of distance and a much larger area then a normal CC. This helps light off the very lean A/F area in the CC with a complete burn of all the fuel. The flame torch also increases flame propagation. This helps the extremely lean normal CC that without the pre chamber at a A/F ratio of 30:1 would have a very low flame speed. This where all my testing using my home-built gasoline combustion chamber paid off.

[cRiPpLe_rOoStEr]

Makes me wonder how it would handle ethanol.

[pgfpro]

Originally Posted by cRiPpLe_rOoStEr

Makes me wonder how it would handle ethanol.

It works great with all types of fuel including ethanol.

These are the fuels I have tested with... Gasoline pump 91 and 87. E98 E85 E75 and E10. DTR601 auto paint reducer, and 7 other types of paint solvent. GEM 42 and 38 fuel.

[cRiPpLe_rOoStEr]

I guess the only fuel it won't handle is Diesel fuel. Possibly it would be a good engine for a road trip...

[Logic]

Originally Posted by cRiPpLe_rOoStEr

I guess the only fuel it won't handle is Diesel fuel. Possibly it would be a good engine for a road trip...

Hmmm... With the compression ratios pgfpro runs I wouldn't be surprised if it did run on diesel too with the pre chambers blocked off.
The conrods etc might be a bit too light though.

(I get the impression compression ratio talk is avoided here to avoid a whole lot of: "Impossible! Lies!" hoo-ha BS.
Remember it's adjustable via the turbo boost and 2 AF ratios here)

[pgfpro]

Originally Posted by cRiPpLe_rOoStEr

I guess the only fuel it won't handle is Diesel fuel. Possibly it would be a good engine for a road trip...

At this time, I haven't tried diesel fuel and to be honest don't have the interest in it. All my time and energy are to test types of petrol and different solvents.
This Summer I will be finishing testing Gasoline Compression Ignition GCI with this engine. The initial test looks very promising.

[pgfpro]

Originally Posted by Logic

Hmmm... With the compression ratios pgfpro runs I wouldn't be surprised if it did run on diesel too with the pre chambers blocked off.
The conrods etc might be a bit too light though.

(I get the impression compression ratio talk is avoided here to avoid a whole lot of: "Impossible! Lies!" hoo-ha BS.
Remember it's adjustable via the turbo boost and 2 AF ratios here)

It definitely could run on diesel in the high compression engine V2 version, but my focus is petrol and solvents.

Your 100% correct on given the compression ratios. I decided to make a video on the compression ratio in the future and take advantage of visual aspect.

[cRiPpLe_rOoStEr]

If I were 100% sure you wouldn't risk ruining the engine trying to run on Diesel fuel, I would be curious to see it running on Diesel. But anyway, since you're more into testing it with solvents, I guess you already gave kerosene a try.

Originally Posted by Logic

Hmmm... With the compression ratios pgfpro runs I wouldn't be surprised if it did run on diesel too with the pre chambers blocked off.

With port injection? No way. Unless he tried a similar approach to the Hesselman engines, which featured direct injection and spark ignition yet were meant to use heavy fuels such as kerosene and Diesel fuel.

[pgfpro]

Originally Posted by cRiPpLe_rOoStEr

If I were 100% sure you wouldn't risk ruining the engine trying to run on Diesel fuel, I would be curious to see it running on Diesel. But anyway, since you're more into testing it with solvents, I guess you already gave kerosene a try.




With port injection? No way. Unless he tried a similar approach to the Hesselman engines, which featured direct injection and spark ignition yet were meant to use heavy fuels such as kerosene and Diesel fuel.

My focus has been solvent type of fuels. I just have too many irons in the fire to add another one. lol