Super Jet what do you think about this porting

[chriselmore_1]

i was getting ready to swap cylinders and was comparing the to. it looks like my old cylinder had extensive porting to the transfers and boost ports. lik boost port was made bigger and is lowered. the transfers apear to be wider. its a 0061x cylinder. the sleave to casting is flawless. exhaust ports were about 52mm wide measured with the diameter not across. the sleaves were cut and countersunk below the bottom of the cylinder castings too. i will post some measurements when i get home. just curious about this setup with for a limited motor for freestyle/freeride

 

[chriselmore_1]

also the motor this cylinder came with had trenched cases so im wwondering if it was possibly ported for a stroker crank

 

[chriselmore_1]

measurements from the top deck. down
exhaust port=39.6 to top of window 69.9 to bottom of window
transfers=53.5 to the top of window 71.8 to the bottom of window
boostport=54 to the top and78.5 to the bottom.
i will post widths when i figure out how to measure them

 

[chriselmore_1]

cool!

 

[chriselmore_1]

anyone?

 

[SUPERTUNE]

Pictures don't really tell the port mapping, If you would like a better answer, a more detailed port map would help you get a qualified answer.
Well at least I COULD then be able to.
Here's a link you need to study and learn what a port map is and how to properly understand what you have as far as porting done to that cylinder.

http://www.macdizzy.com/cylinder_map.htm

Also this will give you some idea as how your going to NEED to setup the rest of the engine package to make the porting work for intended use.
Some really good HP ported cylinder won't work worth a crap in the wrong application.

 

[Dustin Mustangs]

Great link!

 

[waxhead]

Please post the distance from the top of the exhaust to the top of the cylinder

 

[chriselmore_1]

Please post the distance from the top of the exhaust to the top of the cylinder

shoot thought i had that posted. musta forgot. its up now

 

[Kalwren]

Pictures don't really tell the port mapping, If you would like a better answer, a more detailed port map would help you get a qualified answer.
Well at least I COULD then be able to.
Here's a link you need to study and learn what a port map is and how to properly understand what you have as far as porting done to that cylinder.

http://www.macdizzy.com/cylinder_map.htm

Also this will give you some idea as how your going to NEED to setup the rest of the engine package to make the porting work for intended use.
Some really good HP ported cylinder won't work worth a crap in the wrong application.

Freaking awesome write up! Thanks for the link!

 

[Tyler Zane]

lots of good info it the link. i give all great engine builders props!!