ESE's works engine tuner

[andreas]

In the editing room:
-What is diesen Maico, how many takts it got?
Bruno? -Vier, because of the nockenvelle.
Klaus? - Zwei, It fires every revolution.
Well, nockenvelle counts for at least one, must be it's a dreitakter.

[Flettner]

Finally got the aulternator sorted, 14.1V continuous.
Time to find another trail ride, tuning time.

[TZ350]

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Starting to get there, supercharged nitro 50cc 11hp @ 8k rpm. https://youtu.be/hKaGf_9yMLU

Our Team ESE RG50's need 14k rpm to get 11hp. Sure looking forward to when 2Stroke Stuffing gets his bike running consistently.

[SwePatrick]

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Starting to get there, supercharged nitro 50cc 11hp @ 8k rpm. https://youtu.be/hKaGf_9yMLU

Our Team ESE RG50's need 14k rpm to get 11hp. Sure looking forward to when 2Stroke Stuffing gets his bike running consistently.

Don´t trust the numbers, a lot of noise and the sensor was calibrated high.
But yes, it will produce quite high numbers at lower rpm compared to a 'piped' engine.
It might never get a big peak later in rpm band thou, just because there isn´t any more breathing than the superchargers capacity.

[Flettner]

Edited....

[andreas]

Indeed. Maybe it can also be an "inverted" type, where the induction happens through the valves, and exhaust at ports in the cylinder. That way it can still have a good pipe.
Talking about the uniflow.

[ken seeber]

Indeed. Maybe it can also be an "inverted" type, where the induction happens through the valves, and exhaust at ports in the cylinder. That way it can still have a good pipe.
Talking about the uniflow.

My suggestion to Alex was to raise the transfers to above the exh port height. Yes there will be blowback into the transfers, albeit resisted by the blower pressure, but it will give the engine the opportunity to supercharge during the "blowup" period , as opposed to the blowdown period. Maybe the pipe will still work as well.

Blowup is still optional or even inevitable though.

[andreas]

At this point I've lost the understanding for what he is trying to do. The uniflow achieved everyting he is after- almost a century ago.

[SwePatrick]

My suggestion to Alex was to raise the transfers to above the exh port height. Yes there will be blowback into the transfers,

It will demand a LOT of pressure from the supercharger to overcome the blowdownpressure(who want´s to blow down into crankcase)
Pressure that high isn´t aviable from that supercharger.
He needs helix lobes and teflonstripe it.
And,, it gets very hard to drive.

[Vannik]

A supercharger like Alex is using is very inefficient and not capable of much pressure if I have his model right. This is its map:

[Frits Overmars]

My suggestion to Alex was to raise the transfers to above the exh port height.... it will give the engine the opportunity to supercharge during the "blowup" period...

Alex has got that covered with his rotary exhaust disc, that closes the exhaust before the transfers, so there is no 'blowup' phase.

[husaberg]

A supercharger like Alex is using is very inefficient and not capable of much pressure if I have his model right. This is its map:

I suspect they have Teflon tips and melt before 2 bar. like the Toyota used to.
Roots blowers are inefficient esp with regards to heat compared to screw blowers, but are cheap and cheerful

From memory, on the GM diesels they were only used to scavenge and later turbo was used to give a HP boost and likely make it quieter.
The AMR are 300cc per rotation run to about 14k
i would suspect that's enough flow for north of 45hp.
not sure what it would take to run one though.
but with a AC clutch and a IHI RHb31 it would be pretty spectacular.
there is a slighly bigger AMR500 but surely that's too big?

[speedpro]

I have an AMR300. they are plain jane, no fancy teflon in these babies. Ex suzuki Cappucino

[ken seeber]

Alex has got that covered with his rotary exhaust disc, that closes the exhaust before the transfers, so there is no 'blowup' phase.

Frits, it was a suggestion of some time ago when there was some discussion on the rotary exh valve and perhaps its potential durability.

I understand the comments on the efficiency of the selected blower, but when he gets it running properly then time will be the judge.

More to come...

[Vannik]

Frits, it was a suggestion of some time ago when there was some discussion on the rotary exh valve and perhaps its potential durability.

I understand the comments on the efficiency of the selected blower, but when he gets it running properly then time will be the judge.

More to come...

I know it is easy from a distance but from running a lot of simulations and tests on a land speed bike with a supercharger we learnt a few things. The hunting phenomena which is blamed on fuel starvation is in all probability the high cylinder pressure when it makes power preventing the full inflow of inlet gas leading to a pressurized inlet system, then the power drops, the inlet system discharges and the power climbs again. To be repeated again.