ESE's works engine tuner

**cotswold** · 5th February 2013, 20:55

Originally Posted by TZ350

Attachment 277947 Attachment 277948 Attachment 277946

How to shorten a big end pin needed for a crank rebuild, just cut it off with a slitting blade, works a treat.

Thanks To TZ and Culley I now have a crankshaft almost ready. I was the entertainment this evening at team ESE's head quarters. I first had a play with the press and dismantled a couple of cranks that TZ wanted the rods out of, they go off with quite a crack and without much warning and Culley was sat waiting for my inevitable reaction, he nearly choked on his beer.
My rod kit needed surgery and the pin was shortened in the lathe with the help of a cutting disc, never seen this done before. The pin was then pressed into position, the first time I ended up with not enough free play ( which also amused my host no end as he had been expecting me to bugger it up ) so had another go with the aid of a 1 tho' shim and it came out pretty well. Have to go back thursday to balance it, I had a very enjoyable evening topped off by an un-named bucket racer turning up with his bike to set up his ignition, he provided the biggest laugh of the night and I may leave it to him to spill the beans or if I get enough requests I may blab.

**koba** · 6th February 2013, 10:00

Originally Posted by cotswold

if I get enough requests I may blab.

Request one...

**husaberg** · 6th February 2013, 10:12

Request two

Plus Neil (Fletner)
can you explain the Uniflow to us....
all casting i understand were made by you and what gearbox did you use for the 100cc
I must be honest i have never got my head around the uniflow...........

**2T Institute** · 6th February 2013, 10:25

Originally Posted by Flettner

Just trying to learn how this forum works.
Now I see how videos are posted!

Your a handsome devil Neil and do your own PR work as well

That sounds much better than the average aero engine

**TZ350** · 6th February 2013, 10:45

Originally Posted by cotswold

I had a very enjoyable evening topped off by an un-named bucket racer turning up with his bike to set up his ignition, he provided the biggest laugh of the night and I may leave it to him to spill the beans or if I get enough requests I may blab.

It was a great evening having fun working on bikes .... but someone un named (and not me) has a confession.

I have seen plenty of ....... from 4T's to the point of it almost being normal for them, but never ever so much ....... from a 2T.

a first for everything I guess ....

**RAW** · 6th February 2013, 11:44

http://www.kiwibiker.co.nz/forums/at...5&d=1359754172

Frits, the radius at the bottom of the cylinder into the A and B transfers ? Why isn't there the same radius on the C port entry

**wobbly** · 6th February 2013, 12:29

There is a rad on the C port - just hard to see clearly.
Look at the top right hand pic - I ringed the place you can just see it in Paint.

**cotswold** · 6th February 2013, 12:50

Originally Posted by koba

Request one...

No names but, it involved a 2t with a new ignition fitted by using some kind of epoxy then DRILLING and tapping out the epoxy to bolt the ignition to. Sounds fine until the bike was left on it's side for a trip in the car, when it made the workshop it was dripping oil like grandads trumpie, when the ignition cover came off it dropped about a litre on the floor, not supposed to connect with the gear box, but somehow

**TZ350** · 6th February 2013, 13:04

Originally Posted by cotswold

.... it was dripping oil like grandads Trumpie, when the ignition cover came off it dropped about a litre on the floor ....

It was

a few beers and lots of good natured laughing about the new bike pretending to be a 4T. But it was a bit of a head scratcher

for the team figuring out what had happened, in the end it was Chambers who twigged to it

.

All good fun.

**RAW** · 6th February 2013, 14:37

Originally Posted by wobbly

There is a rad on the C port - just hard to see clearly.
Look at the top right hand pic - I ringed the place you can just see it in Paint.

Thanks for the reply wobbly, yeh noticed the small rad, just wondered weather this is a planned radius size, ? for flow or if it may be larger than the pics show, more like the others and how this may have effected performance, that is if there is any proven knowledge into this.

Cheers All

**wobbly** · 6th February 2013, 15:41

Here is the reason the radi work on the duct entries.
This is a YZ152 ( 60mm bore for open class kart ).
Any flow coming from under the piston or sitting above the crank enters the duct over a dead sharp edge.
Sharp edges are only used in aerodynamics for supersonic flow over jet wings.
There is no supersonic flow in a 2T transfer duct I know of.

**Flettner** · 6th February 2013, 19:04

This is a uniflow crankcase induction ( no super charger ) in operation. This shows that the uniflow cylinder scavenge principal is sound. I was told before I started this project that the exhaust piston would melt and the concept was floored. This engine ran for many hours in this boat, under load, 9200 rpm max. After warming up the engine it could be held at 9200 until it ran out of fuel. This engine had cast iron pressed in sleeves ( bad for heat transfer ) and home cast exhaust pistons ( LM 13 ). This was the first day in the water under load, so I was taking it easy, no full throttle.
Second part to the video is the next day out on the lake, this time full throttle was used ( near the end of the clip over the back of the lake ). As per usual ( low budget ) the home made CDI burnt out so that was the end of our second day testing.