ESE's works engine tuner

[wobbly]

All latest generations of engines with normal stagger ( A port first ) have the same axial relationships as the Aprilia.
Flat A ports are long dead.
Welding the roof corner is needed in the Yamaha B port to flatten it out as it goes into water, the A port simply needs epoxy
to fill in the top radius and increase the upward tilt.
The C port is always in the 50 to 60* range, depending upon the end use, the bore/stroke, and the port width in relation to the B width.

[Flettner]

The crank in the photos is from a Mercury inline six, but (guessing) about fifteen years and one design-generation newer (early '70s) and with 40-50% more displacement than the red Mk78 (about 1958) in the photo. The car has a V-6 that's a good ten years newer yet. If you're into this old stuff, the last generation of crossflow Mercs was called "Direct-Charge;" google that term for photos of the somewhat unusual piston.

On Pg. 78 of The Bucket Foundry thread is some talk about an oddball outboard project; Flettner, I think the crank you picked up might well be the one that Dick Austin is using in his homebuilt motor (which however is loop-scavenged, not crossflow).

The rod with the beam, page 78? That's a rod, and I am using a crank from, a 250 four 4T to make an oil less twostroke. Will be using the FOS concept (sort of). It's being machined out of solid plate as I wright. Is using a "leagal" pressurised crank case.

[ken seeber]

Well what? Bets please, on what the outcome might be

I can understand that many of you have been holding your breath, just waiting, so, to avoid any further suffocations, I am happy to say it works.
However , working to the level of 70 hp @ 18k, it might take a tad more effort. There's some weird phenomena going on that I've gotta get my head around. But after that, I'm going for 80hp. Sorry Harry.

[breezy]

I can understand that many of you have been holding your breath, just waiting, so, to avoid any further suffocations, I am happy to say it works.
However , working to the level of 70 hp @ 18k, it might take a tad more effort. There's some weird phenomena going on that I've gotta get my head around. But after that, I'm going for 80hp. Sorry Harry.

Ken ,any chance you could be more specific?? or are you holding yourself back because of legalities

[Flettner]

Anyone here friends with BRC karts? I'm after one of their pistons, for the sleeve engine. 24mm crown height from the gudgin pin center.

[Lef16]

Welding the roof corner is needed in the Yamaha B port to flatten it out as it goes into water, the A port simply needs epoxy
to fill in the top radius and increase the upward tilt.

I think epoxy is also good for inner radii!Does it work?Did you test it?
What brand should I trust?
Cheers

[Haufen]

Ken ,any chance you could be more specific?? or are you holding yourself back because of legalities

I think I got something here. Remember, the RSA had a carburetor from the garden sized 43mm and 54hp @ 13000 rpm. Then along comes the Ryger with 18000 rpm and a carburetor from the garden sized 30mm. Now in Ken's picture, guess what's there! Exactly, an even smaller carburetor from the garden! This can not be coincidence! I can not say for sure which number there is on the carb, but if it's anywhere near the 19 I think I could decipher on that carb, then this thing should have the potential for triple digits, for sure!

[husaberg]

Anyone here friends with BRC karts? I'm after one of their pistons, for the sleeve engine. 24mm crown height from the gudgin pin center.

try rick he is spanering Superkarts with a Aprilia clone DEA?

Hello all, great forum, great to see a bunch of enthusiest sharing ideas, knowledge & encourigement

My question, can anyone assist with the direction to the page where Frits Overmars mentioned, fuel pump type / site link, pressure ect upon the Aprillia

Cheers all, keep up the great sharing of a common interest, Without competers we all LOOSE

[Frits Overmars]

Anyone here friends with BRC karts? I'm after one of their pistons, for the sleeve engine. 24mm crown height from the gudgin pin center.

Neil, the man to talk to at BRC engineering is Riley Will: http://www.brcenginc.com/contact.html
Other possibilities are
Andrea degli Esposti of DEA, deaengineering@gmail.com
and
Francis Payart of FPE, f.p.e@wanadoo.fr.

You can give those guys my regards, and they may still help you .
Francis is even a kiwibiker forum member, so you could send him a PM, but I don't know how often he takes a look here.

24 mm from gudgeon pin center to tip sounds familiar. The Aprilia RSA and RSW had either 24 mm or 21 mm.
Try Asso and Vertex in Italy; both of them supplied the Aprilia racing pistons.

[peewee]

wobbly you ever tried this stuff ? i got some the other day as i figure now the cylinder is located 6mm higher and wider sides with the pieces i welded over the water jackets it puts the head and cylinder much closer to the fuel tank underside. a heat barier on the fuel tank bottom couldnt hurt i guess

http://www.ebay.com/itm/DEI-010396-2...27c1fc&vxp=mtr

[Flettner]

Neil, the man to talk to at BRC engineering is Riley Will: http://www.brcenginc.com/contact.html
Other possibilities are
Andrea degli Esposti of DEA, deaengineering@gmail.com
and
Francis Payart of FPE, f.p.e@wanadoo.fr.

You can give those guys my regards, and they may still help you .
Francis is even a kiwibiker forum member, so you could send him a PM, but I don't know how often he takes a look here.

24 mm from gudgeon pin center to tip sounds familiar. The Aprilia RSA and RSW had either 24 mm or 21 mm.
Try Asso and Vertex in Italy; both of them supplied the Aprilia racing pistons.

Thank you, again.

The sleeve engine has been sitting waiting for me to build a piston, so I decided to build a blank and see what was required (no drawings, the engine just evolves as I go), to my good fortune it would seem I can use a ready made piston (as above request) but just modified a bit. This has put the sleeve engine "back on the burner" as it were.
This is NOT the oil less engine as this sleeve engine will consume a lot of oil I think (like the Crecy).

[wobbly]

For smaller jobs J B Weld is a great epoxy for ports.
Better for bigger filling jobs is Devcon F.

I have used the same type of reflective tape around kart fuel tanks, and airboxes to stop heat buildup - seems to work fine but have
not used the gold stuff before.

[husaberg]

Thank you, again.

The sleeve engine has been sitting waiting for me to build a piston, so I decided to build a blank and see what was required (no drawings, the engine just evolves as I go), to my good fortune it would seem I can use a ready made piston (as above request) but just modified a bit. This has put the sleeve engine "back on the burner" as it were.
This is NOT the oil less engine as this sleeve engine will consume a lot of oil I think (like the Crecy).

Piston pour TM K7 e Vortex, TM 10050
not quite

http://www.superkart.it/index.php?ma...x&cPath=92_108


these I think might be 25mm
you will gain the rest offset boring the pin housing
http://www.ebay.com/itm/otk-tony-rac...-/252037482178


http://www.ebay.com/itm/go-kart-vert...item3a9f90b4bf

[TZ350]

Still searching for a 38PWK - anyone

Think I found one, Wob if you are still looking for one and if this is what you want, PM me.

[peewee]

i think this is the same stuff jan used. it works pretty good and cheap as peanuts. consistency is like putty so you can do alot of build up http://www.ebay.com/itm/Green-Stuff-...item19cbff5d2b