ESE's works engine tuner

[DaisyB]

And here's the start of next years engine. The latest "legal" barrel, and the crankcase mouth to give an idea of limitations. Bore 66.5, stroke 57, rod 107mm. Bear in mind I'm not allowed to add any material or move the studs.



I'll have lots of requests for tuning advice once I get the manifold questions sorted
Cheers.

[F5 Dave]

Ok just to join the club. Sorry for the noise it appears to only be firing every now and again. Oh and yes helmet not on. Bad bad bad. Sorry I was young and silly then.

That was like 3 years ago. Young? Sheesh!

[speedpro]

We all know he has problems with numbers

[jasonu]

[QUOTE=richban;1130651170]Ok just to join the club. Sorry for the noise it appears to only be firing every now and again. Oh and yes helmet not on. Bad bad bad. Sorry I was young and silly then.

That was like 3 years ago. Young? Sheesh!

You'd get thrown in jail if ya did that at Mt Welli (in my day anyhow)

[husaberg]

My problem with the inlet manifold can be seen, it can't be straightened out properly or a down draft used as the frame rail is right above it.

Can you twist the cylinder around 90 Degrees?
I guess not..... no crankcase mods.......

[F5 Dave]

[QUOTE=jasonu;1130651339]

Ok just to join the club. Sorry for the noise it appears to only be firing every now and again. Oh and yes helmet not on. Bad bad bad. Sorry I was young and silly then.




You'd get thrown in jail if ya did that at Mt Welli (in my day anyhow)

Ahh but that was at the slipway, a tiny temp track we used but it was built for drifting cars which I believe is some sort of means of diposing of old tyres.

[TZ350]

Chaps, experiencing a sense of finishing a good book- been reading the thread for the last few months and tonight I get to the end. (Now all I have to do is re-read the notes I've made along the way!)
Thanks for a brilliant read, I've learnt as much -if not more- in the last 800 odd pages as I have from messing about tuning 2 strokes over the last 20 years. Cheers, Dave

Hi Dave, you have done well to get through all 800+ pages.

I am stuck with a long inlet manifold of about 90 mm along center line, which curves about 35* What would be better for power: shorter & more curved or longer and straighter? Should the cross sectional area remain the same all the way through?

Would it be possible to do away with the inlet tract and bolt a Tillitson pumper carb to the cylinder? They can go on at any angle and we got good results with ours.

I'm allowed any carb (but no injection thank god given the last few pages) so I'm using a 39mm Dellorto flatside. Going to cast my own manifold having been inspired by Fletter

I am a real newbee to fuel injection and have probably caused most of my own problems.

Its good to see someone interested in following Fletteners lead and thinking about casting their own parts.

And here's the start of next years engine. The latest "legal" barrel, and the crankcase mouth to give an idea of limitations. Bore 66.5, stroke 57, rod 107mm. Bear in mind I'm not allowed to add any material or move the studs.

Vespa scooter, very interesting, I like these projects and its just like the Simpson, where you have to use all of your imagination to get the best out of the engine and bike within the rules.

This is certainly a good place to pickup usefull tuning tips.

Thanks for posting the pictures, please post more as your project develops.

[Flettner]

All I had time for tonight, four threads on top are not head studs. Both cylinders have been heat treated but I'll only machine one, untill there is a mistake!
This appears to be a very clean casting, must have had the risers ( feeders ) in the right place.

[F5 Dave]

_{I cannot believe the finish you are getting on that casting. That is outstanding.}

[Drew]

_{I cannot believe the finish you are getting on that casting. That is outstanding.}

How are you off for time Dave? I know you don't like to spend a great deal of money (and I can certainly relate), but your own castings to make your bike watercooled seems to need time more than anything else.

The MB could be outstanding with a proper water jacket, no?

[Flettner]

Greg at Thames foundry ltd, he knows how to cast aluminium proper.

[speedpro]

and you don't have a clue. Yeah right.

[F5 Dave]

How are you off for time Dave? I know you don't like to spend a great deal of money (and I can certainly relate), but your own castings to make your bike watercooled seems to need time more than anything else.

The MB could be outstanding with a proper water jacket, no?

Ask Jimmy about my RG/RGV/RZ/CPI 500 2 stroke. He's seen it once. Its rego & a speedo fix (and another trip to the dyno) from being used again, but its sitting with a sheet on it at the side of the garage due to lack of time.

[Yow Ling]

All I had time for tonight, four threads on top are not head studs. Both cylinders have been heat treated but I'll only machine one, untill there is a mistake!
This appears to be a very clean casting, must have had the risers ( feeders ) in the right place.

Even if it never ran properly it is still beautiful.

How does the outside of the sleeve get oil ?

[jasonu]

How are you off for time Dave? I know you don't like to spend a great deal of money (and I can certainly relate), but your own castings to make your bike watercooled seems to need time more than anything else.

The MB could be outstanding with a proper water jacket, no?

Fabricating and welding a water jacket to the existing cylinder is easier.