ESE's works engine tuner

[Flettner]

This was my E90 pump, inside is a Honda 50 ( fourstroke ) oil pump element running in an alloy bronze housing. I ran this off the outside of the flywheel with a small tooth belt. Fuel was regulated by a needle on the throttle slide. More revs, more fuel pressure.

[husaberg]

The wiring diagram thread
http://www.bikechatforums.com/viewto...322761#2322761

Many service manuals
http://www.carlsalter.com/motorcycle-manuals.asp

One thing to remember TZ is to start a bike with CVT it will need a crankshaft kick or a electric atarter

[Flettner]

husaberg, whats happening? are you sending me some patterns to look at? Send them depot only Hamilton and I'll pick them up. We are rural.

[husaberg]

husaberg, whats happening? are you sending me some patterns to look at? Send them depot only Hamilton and I'll pick them up. We are rural.

I was planning on flying up with them.... so i could see how it all works.
The misses has ok'd it and all.
Just the logistics to sort. When it suits you and the foundowndry.

[Frits Overmars]

Impressively complicated....beyond me. Hilborn mechanical pumps with what's pretty much a linear delivery with revs work reasonably well.

Think small, Grumph. That Hilborn pump is probably heavier than the airplane...

[TZ350]

What set up was the oiling on the GP125 std Rob? just a metered supply into the intake stream?

Yes ... But there is no pump drive now so I might make a metered suck supply that drips into the intake for some supplementary oiling.

[Forgi]

Hi everybody !

Wobbly!

I put some nozzle into the exhaust duct to check out where is the best point to narrow it. So far I didn't have the chance to test and measure, but once I get results I'll let you know. By the way didn't you have similar tests? Here you can see three variations.
The first was made the way that the duct narrows as soon as possible and keeps the shape all along, so the area is 75% with 25 mm behind the port and it stays the same through the entire length of the duct which is 65 mm. The second is almost the same as the first, the only difference is that at the end of the duct the area expands to 100%. The third one is tapering all along and at the end of the duct the area will be 75%. You can see some pictures to show how I've resolved the abovementions.

[wobbly]

I havnt tested variations like yours - only reducing the duct as far back as it is possible to weld, and having the 75% at the manifold face.
Then expansion out to 100%.
A CNC transition from oval to round made more power than the stepped face into a round spigot did.
Only point I would add is that you should also look into grinding the aux ducts all the way along the length to the pipe.
This helps promote the blowdown flow when the piston has only partially opened the top 1/2 of the Exhaust.
Edit - once you have done the nozzle test have a go at modernising the ports as well.

[Flettner]

TZ, is this what you had in mind?

[TZ350]

TZ, is this what you had in mind?

Yes that looks excellent, I will be able to make a top hat cover for the plenum with the control cables running through it for the ball valve.

[Frits Overmars]

You'd better copy Flettners rotary valve cover, TZ. Then you get it all: an extremely short inlet tract, variable valve closure timing and ride by (bowden) wire.

[wobbly]

I was thinking about a conversation we had a while ago Neil about using the variable timing rotary valve slider as a throttle,as well as its normal function as a port area control.
This then makes the ball valve redundant, but of course keeps the short bell intake.
Will make Frits happy as well due to making it even simpler.
Seems like a good time to try the idea on the old Kawasaki, but dont work on this till you have finish CNCing my TZ400 tripple clamps.

[Frits Overmars]

I was thinking about a conversation we had a while ago Neil about using the variable timing rotary valve slider as a throttle,as well as its normal function as a port area control. This then makes the ball valve redundant, but of course keeps the short bell intake. Will make Frits happy as well due to making it even simpler.

You too, Wob? I had the same conversation with Neil a couple of months ago: http://www.pit-lane.biz/t3173p810-gp...-part-2#139860
Now he has no option but to build it .

[F5 Dave]

Well continuing my mantra (when I am smart enough to follow it, or can be bothered) of testing obvious improvements. I'd found this before but decided last time I'd tested it I had a different pipe, porting & slightly different headshape.

So time to test a rinkydinky R7376 plug instead of my old B9EGV.

No diff. Well maybe teeny bit slightly worse, but in the realms of 2 different runs.

I hate the dyno. Can't imagine how powerful I would imagine the bike would be without using it. Maybe the placebo effect would make me faster.

[Flettner]

Frits, I don't think Rob's computer will " fly by wire " the throttle. The Link will.
Best to just copy the F9 for the minute, it works.
I'm fitting this fly by wire throttle / variable valve cover to my new engine the 360 rotary valve but it might be a while yet, still making patterns for the cases. It will be using the Link Storm computer.