ESE's works engine tuner

[nasone32]

Unfortunately I don't have a thread anymore. but you can ask anything you like.
That rectangle is not hiding anything of the engine. There was just a logo of the previous brand i worked for. But i don't want free advertising. even less for bad people.

these are some pictures of the cylinder.

porting is 200° ex, 129° A , 131° B C
not completely sure, but close enough.
the big molds.
the small ones are from two 52mm bore engines (with pass-thru bolts) this is 50mm bore. look at the difference.

My friend Sprocatti casted this cylinder for me. I went to him and we worked together on the cores.
I made a T-port because it is easier to work with, since i have less experience on booster ports and his booster ports cores were very different from the RSA. and i don't plan to use a closed piston pin, so I thought i would not exploit the full potential and bore width of booster ports anyway.

now I understand the other advantages of the boost ports. but hey, it's done.

[Makr]

Beautiful work nasone32

[adegnes]

Beautiful work nasone32

+1
..................

[jasonu]

Sure, I believe you......

Self regulating class and all that...

[jonny quest]

Has anyone tried E85 in their 2 stroke?

I tried it in a 250cc 4 stroke single, it was worth almost 2hp. But I didn't spend the time to truly optimize jetting, so it was temperamental, and lost interest

[adegnes]

Has anyone tried E85 in their 2 stroke?

I tried it in a 250cc 4 stroke single, it was worth almost 2hp. But I didn't spend the time to truly optimize jetting, so it was temperamental, and lost interest

I have, same story as you, gained power but was temperamental. Didn't get to play much with it cause the urge for further modification got in my way, it usually does...

[jonny quest]

Was your test on a 2 stroke?

[TZ350]

Has anyone tried E85 in their 2 stroke?

Not E85 but a 50/50 mixture of acetone and methanol. RD barrels grafted onto a T250R Suzuki bottom end worked well, tested the seals by soaking them in a jar of it for a few days. The Suzuki ones were good, the Yamaha ones with the special lips were not.

Bike used to peak at 11,000 on petrol and dropped to 10,000 on the mix. The mix was run rich, the air cooled motor ran cool and there was a much better mid range spread of power for the whole race.

A friend ran E85 in his air cooled MX 2T, went Ok but you have to ensure its run rich when the motor gets hot. (there is a clue there, run E85 rich when really hot, don't tune for best power on a lukewarm motor).

Air cooled 2T dyno run on E85: - https://youtu.be/ifSEql1X4R0

Water cooled 2T dyno run on E85 - https://youtu.be/UEQli7nuak4

Both bike have done quite a few off road hours.

[adegnes]

Was your test on a 2 stroke?

Yep, 50cc
............

.

[AndreasL]

Would like to see and know everything of that design nasone32.
Really great work!

[TZ350]

Unfortunately I don't have a thread anymore. but you can ask anything you like.

Would love to see more posts and pictures as the project progresses.

[nasone32]

The engine is 98% ready to assemble. and it has been for years. I'm back in shape and now i just need some free time.
it just needs the head on the lathe and some minor details (water passage, small milling on the crankcase, making an intake manifold)

here's the cvt
for scooter users i must admit this is porn

[Tunisti]

Has anyone tried E85 in their 2 stroke?

We have tried and used RE85 somewhat alot in Finland. Our booze moped is 79cm^3 air cooled lazy 2-stroke Suzuki. RE85 gives enormous (not sure if you can say that ) amounts of low end torque, or shall I say toughness. It's not very well shown in the dyno graphs, but in real life the runnability changes dramatically, engine tolerates rpm's much lower than idle when crawling in forests, throttle response is better and it doesn't care if you slam WOT at very low rpm's. The engine runs much cooler too, and tends to be less sensitive to spark fouling. Good functionality required only jetting. After those dyno graphs the ignition advance was turned a bit earlier, leading to better overall curve and max torque/hp.



Blue is 98 octane gasoline, with 5% of ethanol in it. Red and greenish are RE85 runs. Red curve is at normal operating temperature and greenish is intentionally overheated pull. Only difference was the change of fuel and jetting.


Our RE85 moped: https://youtu.be/gt6gUc91nWA
Another RE85 moped, con-rod failure: https://youtu.be/x7kXIHxhMfw
And sitkuura's RE85 Race-Suzuki's dyno charts (last message on that page, you can try google translate if you want...): http://www.pv-foorumi.org/viewtopic....0472&start=208

We have used 3,5% of Shell Racing M 30 with RE85. Works well, stays mixed even in the middle of winter. Here's also some kind of test raport (4th message on page, unfortunately in Finnish): http://www.pv-foorumi.org/viewtopic....=9705&start=13

E: We have also made couple of DIY RE85 car conversions. Only required some ECT data manipulation with potentiometers. http://i893.photobucket.com/albums/a...psjhxjdwrl.jpg

[TZ350]

here's the cvt for scooter users i must admit this is porn

I am very interested in this as Team ESE have a CVT project in mind.

[TZ350]

A lot of digital ignition and EFI wiring to package neatly onto the frame. The EFI injectors fire from the back of the cylinder across the transfer ducts.



This is my EFI throttle body. The bellmouth and throttle spigot onto the rotary valve cover which has the 24mm equivalent choke or 452mm2 area machined into it.

Some people think this is a bit grey because the current rules only refer to a carburettor, but it does have the word "equivalent" in there.

MNZ rule 24.2 Engines must be derived from non-competition motorcycles. Motocross, Road Racing, Enduro and Go Kart motors and transmission parts are not permitted. There shall be no restriction on the make, type or design of carburettor, ignition, exhaust, piston, cam, valve springs or cooling system except for class eligibility. All engines must be normally aspirated except F4 4 stroke engines of less than 100cc capacity, which may be turbo or supercharged. F4 2 stroke engines over 104cc are restricted to carburation equivalent to a single 24mm carburettor, F5 4 stroke engines over 53cc are restricted to carburetion equivalent to a single 20mm carburettor.