ESE's works engine tuner

[jfn2]

katinas
Thank you for the Wankel pics.
Now I see what your doing with the transfers and intake. With isolating the crankcase from the transfer tunnels and intake charge are you worried about oiling the big and small end rod bearings? Especially turning 15,000+ rpms?

[katinas]

Yes I worried about this, but the same rod holds two years without trouble on mix 1 to 20/25 no less oil. And then decided to lower oil 1 to 35. Con rod big end eye wears out in two weeks completely, not from contact with rollers but from contact with cage. Crank pin still OK. So changed con rod and bearing before this test.
But anyway I will stick to what used in my racing days. Together with fuel/oil mix I use oil pump connected directly to crankcase, at the line where big end center goes. On the left handlebar, using bicycle Sram front gear shifter, with cable to oil pump. Open fully in the heat of the race, never any fail with big end. Maybe it sounded archaic but it works

They used Wankel engines not only on "very important security person" cars, but on rally cross cars too, and long time ago in Ukraine where track was very very sticky with so much alumina and normal engine twisted shafts, cars with Wankel engines goes absolutely in another level. But the main failure was sealing.

Peugeot 205 with Mazda rotary engine
https://www.youtube.com/watch?v=aVtKGvwnmvM

[jfn2]

katinas
very good about your oiling issues. Good work.
Thanks again for the wandel info, very interesting.

[katinas]

Very interesting test today with thinner transfers reed leaps. From the first test, last week, started with 0.55mm and all was fine. Today changed leaps to 0.3mm
After one of hard runs stopped to turn around and immediately felt that something changed, not as good as before. Found this, 0.3 mm leaps damage , so must revert to thicker reeds again

[husaberg]

Very interesting test today with thinner transfers reed leaps. From the first test, last week, started with 0.55mm and all was fine. Today changed leaps to 0.3mm
After one of hard runs stopped to turn around and immediately felt that something changed, not as good as before. Found this, 0.3 mm leaps damage , so must revert to thicker reeds again

Your leap is a petal in English named after a flower Petals


Your English is great btw.

[ken seeber]

Very interesting test today with thinner transfers reed leaps. From the first test, last week, started with 0.55mm and all was fine. Today changed leaps to 0.3mm
After one of hard runs stopped to turn around and immediately felt that something changed, not as good as before. Found this, 0.3 mm leaps damage , so must revert to thicker reeds again

Katinas,

Do you think that the petal (leap......thnx Hooser) damage was caused by:
1. With no keeper or stroke limiter, could the petal have been striking the opposite side of the transfer passage?
2. Again with no keeper or stroke limiter, maybe the petal tip velocity at the time of closure created too much impact and the material broke down?
3. Heat damage, it does look a little black or charred?

BTW, good, interesting and different stuff.


Everyone,

Have a goodie..

[F5 Dave]

Happy Sol Invictus

[lodgernz]

Katinas,

Do you think that the petal (leap......thnx Hooser) damage was caused by:
1. With no keeper or stroke limiter, could the petal have been striking the opposite side of the transfer passage?
2. Again with no keeper or stroke limiter, maybe the petal tip velocity at the time of closure created too much impact and the material broke down?
3. Heat damage, it does look a little black or charred?

BTW, good, interesting and different stuff.


Everyone,

Have a goodie..

I've tried 0.3 CF petals in a normal reed block with stops, and they didn't last long.
0.5 CF seems to be the minimum for my engines.
Steel could be thinner I guess. Never used steel petals so don't know.

[diesel pig]

Steel could be thinner I guess. Never used steel petals so don't know.

and you don't want to, A broken fibre reed is annoying, A broken steel reed can lead to wrecked cranks and ruined pistons.

[ken seeber]

And, if you've got a spare half hour, you might find this interesting:

https://www.facebook.com/classic2str...wNzY4NjEwMzMz/


includes, EFI, oil strategy, carbon fibre, coolant pump, Britten etc

Enjoy

[husaberg]

And, if you've got a spare half hour, you might find this interesting:

https://www.facebook.com/classic2str...wNzY4NjEwMzMz/


includes, EFI, oil strategy, carbon fibre, coolant pump, Britten etc

Enjoy

Shocks like an old Yamaha

[F5 Dave]

I've used 0.3 cf regularly. Used to replace it when the edges got brinneled, sort of wearing through smooth surface to the weave, but that took a race season at least.

[katinas]

Ken, petals damage character looks like from deformation in to the window, from positive high pressure in transfers tunnels, or negative from piston moving up from BDC or impact deformation. With thicker petals I cant see any signs of damage, so temperature maybe not a big cause.
Looks like higher pressure in transfer tunnels resist more to hot gases.

Use piston from previous tests with RGV cylinder with two exhaust windows, so this piston partly masked A and weakened pulse when piston moves up. I simply want to test until the end of this year so have no time to made proper piston to NS cylinder with one exhaust window, that left more room to cut piston and fully open A, same like B when piston moves up. Add picture with red line.

[katinas]

Your leap is a petal i English named after a flower Petals


Your English is great btw.

Two stroke with flowers and cat from beautiful Sardinia

[SwePatrick]

Ken, petals damage character looks like from deformation in to the window, from positive high pressure in transfers tunnels, or negative from piston moving up from BDC or impact deformation. With thicker petals I cant see any signs of damage, so temperature maybe not a big cause.
Looks like higher pressure in transfer tunnels resist more to hot gases.

Use piston from previous tests with RGV cylinder with two exhaust windows, so this piston partly masked A and weakened pulse when piston moves up. I simply want to test until the end of this year so have no time to made proper piston to NS cylinder with one exhaust window, that left more room to cut piston and fully open A, same like B when piston moves up. Add picture with red line.

Katinas,
What alloy do you make your pistons of?