R/C Tech Forums - Pics of my engine porting..

R/C Tech Forums (https://www.rctech.net/forum/)

- Onroad Nitro Engine Zone (https://www.rctech.net/forum/onroad-nitro-engine-zone-71/)

- - Pics of my engine porting.. (https://www.rctech.net/forum/onroad-nitro-engine-zone/133070-pics-my-engine-porting.html)

Pics of my engine porting..

did you polish the outside of the sleeve,and what do you have on the inside of the sleeve.

i have sponge on the inside, it makes it easier for camera to focus....and yes the outside is polished.

Nice porting job on your sleeve.

the exaust port on the motor case looks just the opposite of a novarossi, the top part goes up hill instead of the bottom going down. instead it looks like it goes strait out at the bottom, wallyedmonds do you see that to?

Just wondering, after doing that killer port job on the sleeve why did'nt you advance the timing on the crank??

I just haven't gotten to the crank yet....LOL but I wanted to post a pic of it stock, and after I do the crank today I will post pics of it cdompleted...... I have my timings marked out on the crank though if look at it..

If I'm not mistaken, you don't port the boost port. I'd have to look at my engines to verify though.

Dave

Sorry Maximo I missed that first glance. When you finish that motor it should really rip!! :nod: Let us know how it does.

why dont you also try match porting the liner to the exhaust port ?

Quote:

Originally Posted by mrgsr

why dont you also try match porting the liner to the exhaust port ?

it is now ! i think I said I was still finishing that....but I do like to have a slight lip on top and botom..... the pics are ultra closeup, but if you see it live the port is almost perfectly matched... but in the pics it really doesn't show....

Do not port your sleeve to the exhaust port, you will mess up the timing for the exhaust . If you do not know how to messure timings and what changing the timing does to your enginem do not touch!!

I will also strongly advice you to messure timing on your crank before you alter this, then you know what you have done and you learn more from your project,

Quote:

Originally Posted by am

thanks for the advice,but I do measure timing and have altered the timing on several of these engines, with great results.... i alter the transfer, boost and exhaust as well as induction timing... I have been testing with this particular model of engine for 4 months and have come up with timing profiles that work excelent....

Quote:

Originally Posted by mugenb46

yes i wonder why and i would never polish the out sid of the sleeve,this is where the( seal ) of the motor is for the ports and exaust,and it may make the sleeve expand to much,i think you know what i mean

Quote:

Originally Posted by mugenb46

yes i wonder why and i would never polish the out side of the sleeve,this is where the( seal ) of the motor is for the ports and exaust,and it may make the sleeve expand to much,i think you know what i mean,but it dos look nice i hope it works,the crank looks nice too