ESE's works engine tuner

[husaberg]

Detonation
Might have been posted before (i looked but couldn't see it in the searchs)but it's pretty hoselistic approach here.
http://klemmvintage.com/deto.htm


I never really considered the heat produced from an ignition.

[TZ350]

Page 860 ......

Great little explanation of how a two stroke works. http://www.atvriders.com/articles/twostroke.html

[TZ350]

There were people working in the workshop tonight so it was not appropriate to run the dyno and make a lot of noise.

So started on another part of the project, better handling. By fitting the special front end that Kel got for me from Japan, light weight, pre load, compression and rebound adjustable cartridge forks.

They were a bit short in the steering stem for the MC18 frame. So I made up an alloy cup for the top bearing along the lines that Gigglebutton had suggested to me and cut away the top of the steering head to fit the cup. The plan is to temporarily tack weld the cup in place until the wheels are fitted then the alignment, rake and trail can be checked then the cup can be welded in permanently.

.

[wobbly]

Weird that guys who profess to know plenty have remotely no idea about air flow dynamics.
Having a forward facing "scoop" is bullshit, note the size of the intake on the front of Moto GP bikes, in all classes.
The entry area is way smaller than the exit from the duct into the air box.
A small intake area with an expanding duct will utilise the intake velocity and convert it to increased pressure at the exit - basic thermodynamics.
Then dumping this into a resonant volume can increase efficiency dramatically - be it cooling air, or an airbox feeding the engine.
Same deal as the scoop on a P51, or a Spitfire or anything where getting air from a forward facing intake is actually supposed to do something.

[husaberg]

Good excuse to post a pic of a NSR500
the intake pick up is positioned to comply with the FIM rule of not being ahead of the Axel that's probably dates back to the banning of dustbin fairings.



these intakes wob will be more familiar with
http://www.kiwibiker.co.nz/forums/at...7&d=1322447613
http://www.kiwibiker.co.nz/forums/at...0&d=1322448168
http://www.kiwibiker.co.nz/forums/at...4&d=1322447361

[Grumph]

For years the FIM rule was nothing protruding forward of the axle - fairing or scoops etc. I think even now it's only something like 50mm permitted.

laughed at the kawa pic Hus, as i hope you intended...matching scoops for ignition and intake plus a weird one for the head.

Wob is of course correct - the cross sectional area of a runner from an air inlet should increase as length does.

[husaberg]

For years the FIM rule was nothing protruding forward of the axle - fairing or scoops etc. I think even now it's only something like 50mm permitted.

laughed at the kawa pic Hus, as i hope you intended...matching scoops for ignition and intake plus a weird one for the head.

Wob is of course correct - the cross sectional area of a runner from an air inlet should increase as length does.

narr....I didn't worry about the pic or the right or wrong of the pickup execution just the idea behind it. did ya follow the link......

Btw i bet Neil made that head here in NZ.
I can't find the pic of the Aprilia airbox forced air intake and Banjo.

..later Here a few few Aprilia did inc the banjo.....
Ram air stuff inc how to set up a rig are here.

.....

I did have a nice little car piece on Vee mounting radiators intercoolers and airflow but i can't find it............Honda used it on the NSR from memory but i can't remember anyone else doing it.........

[pete376403]

For years the FIM rule was nothing protruding forward of the axle - fairing or scoops etc. I think even now it's only something like 50mm permitted.

laughed at the kawa pic Hus, as i hope you intended...matching scoops for ignition and intake plus a weird one for the head.

Wob is of course correct - the cross sectional area of a runner from an air inlet should increase as length does.

The right side scoop is not for intake - it is to provide cooling air for the cases utilising the original Bighorn air filter attachment

[TZ350]

I never really considered the heat produced from an ignition.

We have been dynoing an Aprilia 50 that still has its original flywheel/generator setup and the flywheel gets very hot, so hot you can't keep your hand on it. We were wondering if that is normal or not, maybe it is???. If its normal then it would be adding to the motors heat load for sure so some air would be very beneficial.

[Grumph]

We have been dynoing an Aprilia 50 that still has its original flywheel/generator setup and the flywheel gets very hot, so hot you can't keep your hand on it. We were wondering if that is normal or not, maybe it is???. If its normal then it would be adding to the motors heat load for sure so some air would be very beneficial.

If it's surviving the high temp is probably normal - though not of course helpful...

The classic case is grafting on chainsaw magnetos - they rapidly die from heatsoak after running as in their designed environment they run in the stream of air from a cooling fan.

[husaberg]

I guess no one did.......

But has anyone such as Jan Frits or Wob tried?

I guess This is how the crankcase was sealed so it does have the odd modern application.


I found an article on the Porsche air cooled turbos the other day Rob. The airflow requirement per HP was rather startling to say the least.......scarey very scarey

[wobbly]

That last pic of the BSL is interesting in that I spent hours of FEA to design the foot peg mount correctly.
The gearchange lever has a strain gauge built into the tip, for powershift switching.

[cotswold]

I was casting around on the interweb last night and spotted this, can anyone explain what the thinking behind this would have been??

[F5 Dave]

We've covered this picture before. Home-schooling or insufficient protein in the diet.

[wobbly]

I never knew what the definition of excessive was, but in relation to masturbation , that is a prime example.