ESE's works engine tuner

[ceci]

the cut piston skirt idea i developed just as a cheat of the rules to win a world title , it worked , but i can see no other reason to be looking into it as an on going project with some worthwhile end goal.
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ok "touché"

[136kg136ps]

Are there any current aftermarket cylinders that are more up to date clones of the best RSA iteration? Or should I say incorporating the lessons Jan and Frits have so freely shared.

[husaberg]

I don't want to be judgmental about how deep your pockets are Husa, but casting cylinders using those ancient RSW patterns makes me think of taking up smoking because you found a pack of cigarettes.

Feel free
I feel The patterns can be modified to closely resemble that of the later models internally.
yes they will not have the benefits of the revised colling and head clamping
the "mach 3 septums" that dea improved can also be reconfigured.
But the beauty of this model is that they can be easily adapted to fit a RGV suzuki.
of which Suzuki made quite a few.
although dated they are still better than almost anything available in their current state.
PS i gave up smoking a few years ago, i still miss it occasionally.

[wobbly]

A few years ago I did a CAD project for PVP where they used the last Aprilia cylinder as the baseline for their 250cc Superkart tandem twin.
I signed an NDA so cant give you the files ,but the update made alot better peak and overev power , so getting one of those would give you all the details.
FPE do a similar rendition of the Aprilia for a 250cc tandem as well , but I dont know if they have developed the castings any further.

[Flettner]

Still a bloody sight better than a TF / KE / MB / cylinder, yes.

[wobbly]

Still a bloody sight better than a TF / KE / MB / cylinder, yes.

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Yea , but exactly the same amount of effort to build a 55Hp 125 cylinder as it is to build a 45 Hp one.

[TZ350]

Still a bloody sight better than a TF / KE / MB / cylinder, yes.

I would love to have a couple of those cylinders in 100cc (50mm) format. Better yet, some rejected 54mm ones that need re-plating. Will de stroke for 110cc F4 class re bore limit.

Or maybe even better yet. Some machined castings with semi finished bores. That I can finish as required and plate myself.

[Flettner]

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Yea , but exactly the same amount of effort to build a 55Hp 125 cylinder as it is to build a 45 Hp one.

Well, send me the pattern then, or a solid model of the cylinder you want. Oh, and a big sack of money too.
I repeat, I didn't build these patterns but I will cast some from this pattern, as requested, finally.

If you are going to model a cylinder up, make it a 59/60 bore x 61 stroke please, with full powervalve, on all three exhaust ports. Any bolt pattern, I can live with that.

[wobbly]

Trouble is Neil it would take an even bigger sack of money to do the sim work , then the CAD work on an oddball 59/60 bore/61 stroke cylinder that's never been done before.
Who wants that combination and for what ?

[F5 Dave]

Hmm, 170, 350, 510, 700cc.

Cant provide the sack of cash, but can pay in DaveCoin.

It's a bit like Bitcoin, but with less ability to transfer to any other tradable asset.

[Flettner]

Hmm, 170, 350, 510, 700cc.

Cant provide the sack of cash, but can pay in DaveCoin.

It's a bit like Bitcoin, but with less ability to transfer to any other tradable asset.

In other words, very like bitcoin.

[Flettner]

Trouble is Neil it would take an even bigger sack of money to do the sim work , then the CAD work on an oddball 59/60 bore/61 stroke cylinder that's never been done before.
Who wants that combination and for what ?

Off road 175cc, twin disc valve engine....
350 V twin disc valve, this one can be square.
Or perhaps with a commer. 350 V twin, disc valve engine but also perhaps twin discs per crankcase.

[ken seeber]

Here’s a question of Wob based on a guess that the TM KZ R1 is capable of maybe 51 hp with a rule requirement of 30 mm carb and flat line ignition.

So, if this engine was fitted with a Ø40/42 carb and programmable ign, would it be far off the 55 hp RSA, acknowledging that it was reed (maybe this might need to be enlarged) vs RV?

I’d reckon it wouldn’t be far off, given my lack of knowledge on the sensitivity of friggin 2 strokes. Given this, it’d be a pretty simple matter of taking exh and transfer shapes from the R1, scanning these and then 3D printing coreboxes. Obviously this would be for a 54 * 54 layout only and to suit an engine with the same general power delivery curve requirement of a KZ /125 road race application.

[Frits Overmars]

Here’s a question of Wob based on a guess that the TM KZ R1 is capable of maybe 51 hp with a rule requirement of 30 mm carb and flat line ignition. So, if this engine was fitted with a Ø40/42 carb and programmable ign, would it be far off the 55 hp RSA, acknowledging that it was reed (maybe this might need to be enlarged) vs RV?
I’d reckon it wouldn’t be far off, given my lack of knowledge on the sensitivity of friggin 2 strokes. Given this, it’d be a pretty simple matter of taking exh and transfer shapes from the R1, scanning these and then 3D printing coreboxes. Obviously this would be for a 54 * 54 layout only and to suit an engine with the same general power delivery curve requirement of a KZ /125 road race application.

A reed valve engine is less dependent on carburetor diameter than a rotary valve engine. And switching from flat-line ignition to 3D-mapped ignition, ditto power jet and ditto power valve will do more for the power band than for maximum power, so equalling the RSA power figure, 16 years after it was measured, still won`t be a piece of cake.
But in any case, copying Wobs R1 cylinder would be a hell of a lot cleverer than using 1994-Aprilia patterns.

[peewee]

what is this. ktm put one injecter to the rear now it seems