Darthwall Posted March 27, 2009 Report Share Posted March 27, 2009 I got a set of stock cylinders sitin around and have been giving it some thought lately if I do it they are going on a 4mil I would like something that would tear up the trails since that is the majority of what I ride I had the great idea of going with a drag port when I put it together and if you have rode a drag ported bike on trails you know why I wanna do this lol. I am looking for specs so I know what to cut out and what not to any imput would be great Quote Link to comment Share on other sites More sharing options...
tidos76 Posted March 27, 2009 Report Share Posted March 27, 2009 I ported mine. not as easy as it looks. and good luck getting someone to give you their numbers. there kinda sneeky :ninja: about it Quote Link to comment Share on other sites More sharing options...
Darthwall Posted March 27, 2009 Author Report Share Posted March 27, 2009 (edited) ya Im sure they are if I paid 500 bucks to have someone do the work I would hesitate in giving it away for free lol but here is a table I found on the next thread down if anyone else is interested PORT TIMING VALUES FOR RPM RANGE. THE FIRST DURATION IN THE XXX-XXX FORMAT IS THE MIN FOR THAT RPM. EXAMPLE: TO GET TO 9000 RPM YOU HAVE TO HAVE AT LEAST 184 EXHAUST AND 123 INTAKE EXHAUST TIMING 7500 RPM 176-178 8000 RPM 180-182 8500 RPM 183-185 9000 RPM 184-186 9500 RPM 186-188 10000 RPM 190-192 10500 RPM 193-196 11000 RPM 196-198 TRANSFER TIMING 7500 RPM 120-123 8000 RPM 121-125 8500 RPM 122-126 9000 RPM 123-127 9500 RPM 124-128 10000 RPM 127-131 10500 RPM 129-133 11000 RPM 130-134 Edited March 27, 2009 by Darthwall Quote Link to comment Share on other sites More sharing options...
blanco25 Posted March 27, 2009 Report Share Posted March 27, 2009 I dont know thAT much but that table looks to be about right. Quote Link to comment Share on other sites More sharing options...
2/2 many banshees Posted March 27, 2009 Report Share Posted March 27, 2009 (edited) I ported a old 1987 cr250 I had when it went back together it had more bottom end power Edited March 27, 2009 by 2/2 many banshees Quote Link to comment Share on other sites More sharing options...
2003LimitedBanshee Posted March 27, 2009 Report Share Posted March 27, 2009 I have some porting specs that somehow I was able to talk a reputable member of Planet Sand out of back in the day. I'm getting ready to grind on a set of cylinders myself, even popped for the right angle head tool, $300+, so I need to get my money out of that. The specs I had were right around 188* exhaust duration, but I had transfer specs, boost port opening specs etc. I can't find the flippin' file that I saved on it right now, but I'm digging for it tonight. I'll see what I can find. It was for a medium aggressive "dune port" though, not full out drag. He actually even went as far as to mention areas within the transfers that I should address, just from a flow standpoint, timing aside. His screenname was Backcountry on PS if I remember right? Quote Link to comment Share on other sites More sharing options...
2003LimitedBanshee Posted March 27, 2009 Report Share Posted March 27, 2009 (edited) I have some porting specs that somehow I was able to talk a reputable member of Planet Sand out of back in the day. I'm getting ready to grind on a set of cylinders myself, even popped for the right angle head tool, $300+, so I need to get my money out of that. The specs I had were right around 188* exhaust duration, but I had transfer specs, boost port opening specs etc. I can't find the flippin' file that I saved on it right now, but I'm digging for it tonight. I'll see what I can find. It was for a medium aggressive "dune port" though, not full out drag. He actually even went as far as to mention areas within the transfers that I should address, just from a flow standpoint, timing aside. His screenname was Backcountry on PS if I remember right? Haha! Found it! This is a very old post... Surprisingly my login was still current, but found I have very little access to PS now! http://www.planetsand.com/forums/ubbthread...1451#Post421451 Edited March 27, 2009 by 2003LimitedBanshee Quote Link to comment Share on other sites More sharing options...
2003LimitedBanshee Posted March 27, 2009 Report Share Posted March 27, 2009 Oh yeah, those specs were for a stock stroke, so... :shoothead: Quote Link to comment Share on other sites More sharing options...
Snopczynski Posted March 27, 2009 Report Share Posted March 27, 2009 Backcountry is Dan Wade from Patriot Racing. He lives about a mile from me and taught me how to port banshees. Quote Link to comment Share on other sites More sharing options...
2003LimitedBanshee Posted March 27, 2009 Report Share Posted March 27, 2009 Backcountry is Dan Wade from Patriot Racing. He lives about a mile from me and taught me how to port banshees. That's right, I do remember that now. Well, I remember from back in the day when I started that post on PS, that you could tell he obviously knew his stuff!!! I had forgotten that piece of the puzzle by now. I couldn't belive he would just come out with all those specs at the time! Quote Link to comment Share on other sites More sharing options...
Darthwall Posted March 27, 2009 Author Report Share Posted March 27, 2009 sounds like I should try and get ahold of him cause I have never done it before I have just been trying to find alil info that would point me in the right direction for atleast a good starting base. I know patroit does some nice work around the area I just dont want to fork out the money for the work right now Quote Link to comment Share on other sites More sharing options...
Snopczynski Posted March 27, 2009 Report Share Posted March 27, 2009 sounds like I should try and get ahold of him cause I have never done it before I have just been trying to find alil info that would point me in the right direction for atleast a good starting base. I know patroit does some nice work around the area I just dont want to fork out the money for the work right now Dan definitely likes to mess with me when we go over stuff. He makes me think about the answers, he doesn't just give them up when I am over there. Out of most guys I know he is one of the cheapest. He will charge $250 for a dune port on a stock stroke motor. Quote Link to comment Share on other sites More sharing options...
Darthwall Posted March 27, 2009 Author Report Share Posted March 27, 2009 you should tell him to write me up a port map for a trail/dune job on a 4mil or just see how much the job would be arent they over in Tacoma? Quote Link to comment Share on other sites More sharing options...
Snopczynski Posted March 28, 2009 Report Share Posted March 28, 2009 you should tell him to write me up a port map for a trail/dune job on a 4mil or just see how much the job would be arent they over in Tacoma? We live in Bonney Lake. He is not going to want and do that. He probably wont even really want to give you the specs either now. I think he would much rather have you do his cylinders for cash he could spend. Quote Link to comment Share on other sites More sharing options...
Darthwall Posted March 28, 2009 Author Report Share Posted March 28, 2009 We live in Bonney Lake. He is not going to want and do that. He probably wont even really want to give you the specs either now. I think he would much rather have you do his cylinders for cash he could spend. uhh you mean he would much rather do my cylinders for cash he could spend? Quote Link to comment Share on other sites More sharing options...
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