papa_smurf49319 Posted April 22, 2010 Report Share Posted April 22, 2010 Port timings are a good place to start. The guys that make good power figure out the shape/angle and how to get the charge in/out more efficiently with the same numbers as others... That's the secret...and no one will tell you how/what they do. I certainly commend you for wanting to try this on your own...on the other side of the coin none of the best builders in the country ever picked up a set of cylinders and hit the nail on the head the first time. They got better, and better.... Good luck...let us know how it turns out. Well said! I am also one to never want to send anything out, and always do work myself, but when it comes to porting i considered it a art, seeing you do your own will encourage others to do the same. Its just hard to find info on this subject and there isnt very many how to port banshee cylinder books out there lol! Quote Link to comment Share on other sites More sharing options...
SLORYDER Posted April 22, 2010 Author Report Share Posted April 22, 2010 Well said! I am also one to never want to send anything out, and always do work myself, but when it comes to porting i considered it a art, seeing you do your own will encourage others to do the same. Its just hard to find info on this subject and there isnt very many how to port banshee cylinder books out there lol! If you have 13 bucks to spare for a subscription I found a forum that is lead by a very experienced builder who shares all his information and pretty much tends to everyones threads on a daily basis. PM me if you are interested Quote Link to comment Share on other sites More sharing options...
SLORYDER Posted April 22, 2010 Author Report Share Posted April 22, 2010 Port timings are a good place to start. The guys that make good power figure out the shape/angle and how to get the charge in/out more efficiently with the same numbers as others... That's the secret...and no one will tell you how/what they do. I certainly commend you for wanting to try this on your own...on the other side of the coin none of the best builders in the country ever picked up a set of cylinders and hit the nail on the head the first time. They got better, and better.... Good luck...let us know how it turns out. Hey thanks a lot man. Since I read Grahm and Bell's books I have become obsessed with learning everything I can about 2 strokes. I'll try to get a dyno run after I finish. There's a couple tricks that I learned that I haven't seen before with this crew. Hopefully I'll be able to bring something to the table before it's all over. Quote Link to comment Share on other sites More sharing options...
Profilact Posted April 23, 2010 Report Share Posted April 23, 2010 Bragging about beating someone whose bike isn't running right is just stupid. I guess next you are going to be telling people that cubs suck because you beat one. A cub that is jetted right, chassis set up right, right tires with PT Hi-Revs will stomp on your bike with T-5's any day of the week. Stupid? Ha. Who's bragging? Just stating the facts. That bike runs hard, just not as hard as mine. It has all the goodies, except for pipes. I was very close to going cub with my build this year, but I didn't want to shell out 4-600 for the right pipes after the cost of the cub. Thats a lot of setting up with a cub just to beat my little stock cyl bike. Whats the point? Quote Link to comment Share on other sites More sharing options...
okbeast Posted April 23, 2010 Report Share Posted April 23, 2010 Stupid? Ha. Who's bragging? Just stating the facts. That bike runs hard, just not as hard as mine. It has all the goodies, except for pipes. I was very close to going cub with my build this year, but I didn't want to shell out 4-600 for the right pipes after the cost of the cub. Thats a lot of setting up with a cub just to beat my little stock cyl bike. Whats the point? Sloryder I commend you too wanting to do this on your own. I'd rather just pay someone for their knowledge since they've already made the mistakes and know waht they're doing. And Profilact, it barely takes a setup cub to run good and beat a stock cyl. bike lol. I took my cubs straight off my dune ported stock cylinders onto my cub, same with pipes, same frame, tires and everything and it kicks ass. I'm not saying a stock cylinder bike can't run good, but get your info straight before you start spouting off in someone elses thread. Quote Link to comment Share on other sites More sharing options...
Profilact Posted April 23, 2010 Report Share Posted April 23, 2010 And Profilact, it barely takes a setup cub to run good and beat a stock cyl. bike lol. I took my cubs straight off my dune ported stock cylinders onto my cub, same with pipes, same frame, tires and everything and it kicks ass. I'm not saying a stock cylinder bike can't run good, but get your info straight before you start spouting off in someone elses thread. Ok. Quote Link to comment Share on other sites More sharing options...
SLORYDER Posted April 23, 2010 Author Report Share Posted April 23, 2010 Sloryder I commend you too wanting to do this on your own. I'd rather just pay someone for their knowledge since they've already made the mistakes and know waht they're doing. And Profilact, it barely takes a setup cub to run good and beat a stock cyl. bike lol. I took my cubs straight off my dune ported stock cylinders onto my cub, same with pipes, same frame, tires and everything and it kicks ass. I'm not saying a stock cylinder bike can't run good, but get your info straight before you start spouting off in someone elses thread. Thanks man. I won't be able to ride for about 3 months due to work so I figure if I take my time and grind about 30 minutes a day I could have a fast bike when I get home. I plan on adding some finger ports, opening up the boost some and adding some ports that run from the intake straight up through the secondary transfers. As well as bringing her up to around 194 exhaust duration and 74% bore width on the exhaust. Don't see why I couldn't hit 65 plus with little to no extra money involved Quote Link to comment Share on other sites More sharing options...
okbeast Posted April 23, 2010 Report Share Posted April 23, 2010 Ok. Thanks Quote Link to comment Share on other sites More sharing options...
AKheathen Posted April 23, 2010 Report Share Posted April 23, 2010 74%?!?!?....whoa buddy....i really don't think the pipes you are gonna put on there will even utilize that much extra flow...i could be wrong, but i really don't think you will see any gain going that far, and it will really risk ring snagging. i think i remember you being just a cunthair over on your width anyways.....around that point, liniar length really starts to increase radial distance on the rings as the angle of the side of the port increases. i'd hate to see that thing not make it past break-in. remember what i mentioned in earlier pm's too. Quote Link to comment Share on other sites More sharing options...
Profilact Posted April 24, 2010 Report Share Posted April 24, 2010 Pipes again? Quote Link to comment Share on other sites More sharing options...
SLORYDER Posted April 25, 2010 Author Report Share Posted April 25, 2010 74%?!?!?....whoa buddy....i really don't think the pipes you are gonna put on there will even utilize that much extra flow...i could be wrong, but i really don't think you will see any gain going that far, and it will really risk ring snagging. i think i remember you being just a cunthair over on your width anyways.....around that point, liniar length really starts to increase radial distance on the rings as the angle of the side of the port increases. i'd hate to see that thing not make it past break-in. remember what i mentioned in earlier pm's too. Hey did you get my last PM? I was told by an experienced builder that at 75% ring life is still decent with today's rings.. And I know my pipes aren't the best..However the port is very oval and the area really isn't that great...If I just keep it oval and don't flatten the roof I think that I can still get an increase over what I have now.. Quote Link to comment Share on other sites More sharing options...
AKheathen Posted April 25, 2010 Report Share Posted April 25, 2010 i still wouldn't do it.......how about widening it on the bottom more, and keeping a steeper roof angle? look at the angles on the sides if you go that far.....not gaining much Quote Link to comment Share on other sites More sharing options...
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