ESE's works engine tuner

[TALLIS]

Attachment 325383

Team ESE has taken on a cylinder porting apprentice.

Must be a dentist or tattoo artist

[husaberg]

Attachment 325383

Team ESE has taken on a cylinder porting apprentice.

Tell the apprentice she will get fired/disowned/Introduced to Donald Trump, if she doesn't put on her Safety glasses.

[peewee]

hemi im glad you like what ive done but most these guys have accomplished way more impressive things. besides, i only copied old hat that i found around this site. none of it was my own ideas

[Hemi Makutu]

hemi im glad you like what ive done but most these guys have accomplished way more impressive things. besides, i only copied old hat that i found around this site. none of it was my own ideas

Peewee, what you have kindly shared is interesting, esp' doing it with a big cylinder,
& showing the port/time/area issues of getting it to breathe well, rather than just 'tractor' about..

Maybe you could ask Flettner to do a bolt-on P-V for it?

[wobbly]

Listen you perverts, instead of doing that buy her one of these.

http://www.ccspecialtytoolstore.com/...ivel-p/bv1.htm

Makes porting a doodle even for dirty old men bucket racers.

[Frits Overmars]

Tell the apprentice she will get fired/disowned/Introduced to Donald Trump, if she doesn't put on her Safety glasses.

Listen you perverts, instead of doing that buy her one of these. http://www.ccspecialtytoolstore.com/...ivel-p/bv1.htm

Yeah, that will do her eyes a lot of good. That head-swivel is a fine tool, but it won't be much use to a blind tuner.
Come to think of it: judging by the pictures there must be more than one blind tuner around. Ouch-01.zip Ouch-02.zip

[adegnes]

Yeah, that will do her eyes a lot of good. That head-swivel is a fine tool, but it won't be much use to a blind tuner.
Come to think of it: judging by the pictures there must be more than one blind tuner around. Ouch-01.zip Ouch-02.zip

Would love to know the story behind that wooden piston in there!

[wobbly]

The FPE disaster pics reminds me of running in the very first recieved Rotax twin on the Zipkarts new dyno.
Rotax QC was non existent back then, and the very first time I did a full power test, it threw a rod and cut the front of the case
completely in 1/2.
We had to buy 100 big end bearings, and I sat for hours with a 4 digit micrometer and put together sets of needle rollers
within 1 uM of each other - then it was reliable.

[SwePatrick]

If that piston you seek is for a Yamaha, you could be in luck..

It´s actually for an Kawasaki, but it has 18mm pin and pistonheight isn´t very important as i already has a spacer to move the cylinder upwards to fit the long rod i use.
I can just make an another spacer or shim of the one i have.

The imprtant thing is the locking pin for the ring.
I want it at six o clock so i can port out the B-transfers a lot more.
As i can see with wiseco´s 'racers choice' piston for KX250 the single ring is ~7 o clock, not good.

[adegnes]

E8 is up!
https://youtu.be/NAYQyAf0rdY

[Frits Overmars]

A port map is fine for recording the number of ports, but that's about it. As you say, radii and chamfers will distort the map, so you can't take reliable port height measurements from it. But you cannot take reliable port corner radii measurements from it either, so why bother making a port map at all?

Having gotten that off my chest, I want to say that I enjoy your vlogs more and more. A lot of familiar tips are passed on in a relaxed, understandable way.
Keep up the good work Adegnes .

[adegnes]

A port map is fine for recording the number of ports, but that's about it. As you say, radii and chamfers will distort the map, so you can't take reliable port height measurements from it. But you cannot take reliable port corner radii measurements from it either, so why bother making a port map at all?

Having gotten that off my chest, I want to say that I enjoy your vlogs more and more. A lot of familiar tips are passed on in a relaxed, understandable way.
Keep up the good work Adegnes .

Thanks! Means alot!
Anyone with ideas for better ways of measuring the port corner radii?

[Frits Overmars]

Thanks! Means alot!
Anyone with ideas for better ways of measuring the port corner radii?

The pictures show Jan Thiel's 'coins-on-a-stick' that were mainly used for feeling the passage width of ports but that can also be used to check radius diameters.

[adegnes]

The pictures show Jan Thiel's 'coins-on-a-stick' that were mainly used for feeling the passage width of ports but that can also be used to check radius diameters.

Thanks! I'll fabricate a set!

[Frits Overmars]

Thanks! I'll fabricate a set!

You can make those coins-on-a-stick like Jan had, but for radius checking it could be even more useful to have a set of balls-on-a-stick.
If I need to measure a radius in a port corner, I usually check with a drill shaft. After all I've got those lined up with 0,1 mm diameter increments.