Це відео не доступне.
Перепрошуємо.
Two Stroke Cylinder Porting Tips #2 | WATCH THIS BEFORE YOU START CUTTING! | 2 Stroke Tuning
Вставка
- Опубліковано 20 жов 2017
- I've started porting the Peugeot Spx iame m50 and thought I'd share a few more tips for how to go about porting two stroke cylinders.
Support me on Patreon!
/ 2strokestuffing
Donate to 2STROKE STUFFING
www.paypal.com/cgi-bin/webscr...
Instagram
/ 2strokestuffing
twitter
/ 2stuffing
facebook
/ 2strokestuffing
Sweet more pro-tips! Would love to see a time lapse of the porting process.
+FORCED-INDUCTN Thanks! That's a good idea!
Hei man, great videos, finally someone who goes detailed about porting. Thanks for making these. I could have sworn you were Norwegian from your accent, then it got confirmed in one of your videos :) I'm a french guy living in Norway, importing, restoring and tuning mopeds. Norway will soon see its first liquid cooled AV10 MBK 51 in the streets. Also a 103 RCX LC in the making. Keep up the awesome videos!
+Baptiste Ringot Thanks! That's really cool!
+Baptiste Ringot There's something special about the single variated bikes! And the MBK look so good!
2STROKE STUFFING Indeed. I also have a Monza 4 speed, but a properly tuned AV10 engine rips so hard... Awaiting for a mint condition Bidalot RR exhaust and an AV10 Gilardoni Booster LC Kit (This one is a rare gem) to mount on it. Can`t wait haha. Keep up posting man, the videos are awesome.
Just watched the for the first time thks interesting as I used to play with 2 strokes a lot.as I’d blow up my banshee once a yr & rebuild it after every season just to keep it fresh..be nice to have a start to finish time lapse of a completed cylinder with instructions..I can’t tell you how many ports I screwed up learning to do it as a kid..I end up making templates once I got it right
I love your work man, very professional. Do you do customer work? Like someone sends you an engine for porting job?
Hi
you´re doing great stuff!
can you make a vid about details for porting, size/layout/angels/timings/exhaust flange design
recommendations for 1geared mopeds, 2geared, 3/4/4+ geared.
would be great and helpful for all 3rd class tuners
Great tips!
+SWED Typez Thanks!
This stuff is interesting as hell. Unfortunately I will never have the patience to do it without trashing a cylinder.
I was wondering when you chamfer is it just a breaking of the edge of the port window to allow the rings to pass. Thank you for the video.
Very nice videos and i really like the dyno idea, you have a new sub. Greetings from a fellow 2 stroke addict from the Netherlands SKOLL (cheers)
+Chris creations Thanks!
2STROKE STUFFING how far are you with the rpm problem on the readings from the dyno? Maybe i can be of help
+Chris creations It seems to be working fine now actually. Thanks for the offer. I'm going to get a prototype made probably next month, then I'm starting a Kickstarter to hopefully get funding for materials etc.
2STROKE STUFFING thats very nice, i was trying to make one too a very long time ago for my classic 50cc racer but then a friend of mine bought a tovami test bench so it was discarded. Do you have a email i can reach you on?
+Chris creations 2strokestuffing@gmail.com
This is an older video, but I think it should be mentioned for anyone looking to do their own at-home porting. Unless you have a Sleeved Cylinder, Do Not chamfer the exhaust port, or do any porting on the bore side. Many modern cylinders are plated, and the carbide burr/tooling will flake off and crack this "hard shell" of nikasil plating and often effect it further running down your bore. For plated cylinders, professional porters will often port the cylinder then have it replated before installation.
Part 1 addressed this
I started to study and port 2t AV10 engine cylinder recently. In the video you kept the exhaust angle when changing the duration of it. My doubt: do I have to keep that angle until the cross-sectional area of my exhaust port or a little before or after it won't "influence" so much? great videos, I'm accompanied here in Brazil.
New subscriber from Norway😊. Buy a Suzuki ts50x ....want to make it go like a hero. So want to learn by watching your videos😊👍
Great tip on angling a rod did not think of that. Nov 3
+derk nobit Thanks!
Is it ok to port and polish the transfer port... good day and thank you for reply...
Do you mess with the transfers? Should do a chainsaw cylinder
How about cylinder head modification to fix less compression from raising the port. Thanks
+norcodon With the pipe doing it's thing there's not much difference to the trapped volume in the combustion chamber after porting (in theory anyway...)
Could you do a video on proper break in procedures on a 2 stroke
+mark willson Could do!
Are you cutting new port timing? I think it would be cool if you could dyno two different cylinders, one with cut port timing and do another with spacer and decking.
+Rotaz Racing Yep. That's a great idea! I wanr to do a comparison series on the dyno and your idea fits perfectly.
That's best done with the piston cut method I mentioned in previous video.
So you end up only having to port the cylinder once and know it is best power and fit a new piston when you put it back together. Keep in mind that the timing moment is not when the ring clears the port but when the top of the piston clears the port roof.
To do each adjustment to the piston you don't need to even take if off, just remove the cylinder and lay rags around the con rod and engine top and get a bit of flat metal of wood and cut a slot in it to fit it under the piston on the con rod so you can wind the crank back to get the piston skirt to sit on the slotted metal or block as sort of a bench top to steady it while grinding, then grind the channel (shaped like a Water Dam spillway) in the piston a bit more and measure the crown to cut height, clean it up of grinding swarf, refit cylinder, measure ex timing and dyno it.
Repeat that until you see peak power drop off, just like jetting a carb to get the right one, if you did that method using the cylinder instead of piston you would be faced with buying a new cylinder, piston is much cheaper. You can do this in the pits at a track adjusting the piston in steps to get the best timing for power and go back to workshop and transfer new timing to cylinder which is what I and others did road racing 2 strokes as we had no dyno and limited funds.
+AuMechanic Good idea! At the end one could compare all three results too.
I use the piston method for Ex port only. But spacing method is good to test transfer mods as it sort of blocks out any changes in error other then timing height alone, that might be introduced by grinding them to change timing.
@@AuMechanic muchas gracias por su explicación
Love the videos, just wondering what the diameter of your dyno drum is? Cheers mate, keep up with the great videos!
+Geared Vegan Thanks! My drum is 317mm in diameter.
Cheers mate, what carb are you running on the spx as well? Thanks and keep up the great work!
+Geared Vegan Oko PWK 24mm, going to a 30mm now after porting.
Where can I get this porting tool
Sir i have two stroke cylinder i want to increase its rpm power please help me how i can increase the speed from its ports. Please help me tell me sir
Hi when you port the transfer ports do you smooth them? I have a cylinder what has been ported but you can see the tooling marks
I make them slightly rough, not polished but not uneven either.
2STROKE STUFFING thanks. I can still see the tooling marks on mine where the tool has gone left and right.
You used 20 digrees how would it affect the power band
On what rpm will the powerband hit ?
+Jamil Sultan 20° in this case is exhaust roof angle, doesn't affect the position of the powerband directly. Where in the rpm range your powerband will be is mostly decided by pipe dimensions. Different port durations will affect this some, but there's really no direct correlation between rpm and port timing. As an example before I ported the Spx it had 186° exhaust duration but reved over 18 000rpm
Everytime I see you run this motor on the dyno, I wish you would put some ultra light rollers in the variator. (My ears tell me you run the variator below the working speeds of your engine.) This would reduce strain on the motor components and give you more torque. Also you could temporarily try a fixed pully instead of the variator, so you can see engine chracteristics on the dyno sheet. As long as you leave the variator in while dynoing, you only see variator chracteristics on the sheet. It would help to see exactly where max. torque lies in the powerband, so you could choose the rollers for this rpm level.
I think when you have ported this cylinder to the max regarding port cross section and timing, you can achieve over 20hp, even without nitromethane.
By the way, I might steal your idea for a home made dyno, I like it a lot! :-)
+Elmar Dylong yep, I'm running too heavy rollers, it's actually on purpose. On the dyno I let the variator gear out fully first, the part after that is the real run. Kinda like a fixed pulley, it let's me plot power vs rpm. The downside is transmission loss and the uncertainty around it. The variator isn't very efficient and alot is lost to heat(after one pull you can't touch the pulleys, on the 17.4whp pull the belt started smoking at peak power) . After reading every paper on the subject I could find I estimate loss from crank to roller to be in the 20-30% range, maybe even more. This fits my simulations which produce around 23hp(crank) even when using relatively low combustion efficiency(weed wacker territory).
20whp should be a breeze😀
Thanks! The dyno idea is free to use!
Didn't know you did the heavy rollers on purpose, makes sense. I build scooters and know what losses a cvt has. The friction and slippage is why I use Kevlar belts from Malossi or Polini. Original belts only leave a frayed mess around the variator and converter. ;-)
Kan jeg spørre om du har tenkt på overladning(turbo eller lignende)?
+Vegar Skinne har planer om kompressor på en totakter når jeg får tid/råd.
why exhstport 20° ? can u tell me sir
Empirically around 20-25° has proven to work best.
yoo tanks
Hva bruker du til å redigere thumbnails?
+Alexander Veldman Gjør det på tlf, Pixler og Phonto.
How about Reed Case Porting?
Sir do gou have facebook.. I want to ask u something problem with my motorbike
Link to page in description!
di tunggu bang video lainnya, mampir jga ya bang kapan" ke channel saya hehe
Yoiii