ESE's works engine tuner

[adegnes]

Just a thought.
Some of you may remember when I was struggling with getting the Spx to rev and discovered the intake valve was loose and able to shift about 30° on the crank. You may also remember that fixing it made no difference at all. Almost like the engine didn't care, at least not about intake close timing.
Frustrating then, interesting now.

[Greg85]

There was a Jaros flow bench at Aprilia, it proved to be useless, with unrepeatable results...
And even with repeatable results it is useless.
Think of moving piston, pressure pulses, circumstances constantly changing on both sides of the piston!
The only way I found of testing various transfers was by actually making them.
And testing them for power!
The results were quite good....

Thanks for the answer mr jan, i will test this several levels, right now i test that 2 level 16 and 40 mm but you say useless for you the results are insignificant not precise enough? I look in a post you worked with a flowbench MCF what difference with jaros?Thanks

[jamathi]

Thanks for the answer mr jan, i will test this several levels, right now i test that 2 level 16 and 40 mm but you say useless for you the results are insignificant not precise enough? I look in a post you worked with a flowbench MCF what difference with jaros?Thanks

With the MCF you measure the total flow in duct or ducts.
After many years of using flow benches I think they are most useful for developing exhaust ducts.
I can not see the usefulness of a Jaros bench....

[Greg85]

With the MCF you measure the total flow in duct or ducts.
After many years of using flow benches I think they are most useful for developing exhaust ducts.
I can not see the usefulness of a Jaros bench....

Thank you mr jan for your informations

[philou]

Jaros seems interesting for the symmetry of the flows of the transfers.

But maybe it does not matter?

[adegnes]

The bellmouth startup reed.



Just a proof of concept.
I actually made this a couple of years ago as a cure for hard starting with late intake close timing. Soon after I realized my problem was a massive case leak, and never tried it.

[breezy]

The bellmouth startup reed.



Just a proof of concept.
I actually made this a couple of years ago as a cure for hard starting with late intake close timing. Soon after I realized my problem was a massive case leak, and never tried it.

a bit more sophisticated than using your hand... nice

[TZ350]

The bellmouth startup reed. Just a proof of concept.

This is very interesting, looking forward to hearing about the results, could be good......

[F5 Dave]

Can you get a VForce model?

[Frits Overmars]

Can you get a VForce model?

Anything is possible but what good would a VForce reed do? Once the engine is running on the pipe, the reed is removed anyway.

[adegnes]

Anything is possible but what good would a VForce reed do? Once the engine is running on the pipe, the reed is removed anyway.

Think he's joking Frits 😀

[breezy]

Anything is possible but what good would a VForce reed do? Once the engine is running on the pipe, the reed is removed anyway.

Frits the term "running on the pipe", at what point can you deem this is happening?

[husaberg]

Frits the term "running on the pipe", at what point can you deem this is happening?

[breezy]

oh of course... you cant explain it with words either... thats why i asked Frits.

[husaberg]

oh of course... you cant explain it with words either... thats why i asked Frits.

you don't really need words though......... who is this frits character

if Frits was here he would say something like its when all the results of the volumes and the wave actions from lengths and durations that result from either complex math or painstaking trail and error or both finally start to work in unison to produce a pitch perfect HARMONY