350skabarat Posted August 25, 2012 Report Share Posted August 25, 2012 Was wondering if anyone has done their own porting and had success with a realy nice usable broad powerband? Wouldn't mind getting some tips? Quote Link to comment Share on other sites More sharing options...
ClayAiken Posted August 25, 2012 Report Share Posted August 25, 2012 (edited) Seems like everyone that does their own porting it comes out to be a hit or miss you might get a decent running motor one time most of the time it just runs like poop. Edited August 25, 2012 by KatyPerry Quote Link to comment Share on other sites More sharing options...
sheerider11 Posted August 25, 2012 Report Share Posted August 25, 2012 I just smoothed everything out, fixed any casting flaws, and polished the exhaust port. This is the only picture I have. The bike is a lot more responsive now. With the fmf pipes its not half bad. My girlfriend weighs 100 pounds so the thing can be a rocket. But I've ridden it and a few others here that'll tell you, it can hold it's own. A few people in the pit know to watch the black bike with pink flowers on it. Quote Link to comment Share on other sites More sharing options...
350skabarat Posted August 25, 2012 Author Report Share Posted August 25, 2012 I just smoothed everything out, fixed any casting flaws, and polished the exhaust port. This is the only picture I have. The bike is a lot more responsive now. With the fmf pipes its not half bad. My girlfriend weighs 100 pounds so the thing can be a rocket. But I've ridden it and a few others here that'll tell you, it can hold it's own. A few people in the pit know to watch the black bike with pink flowers on it. Well that's not realy classiffied as porting man. By the looks of it your intakes are bigger? That usually makes a motor lazier down low if you don't touch the exhaust. Anyways thanx for replying though. Seems like there a whole lot of selfish mother bitches on here. Quote Link to comment Share on other sites More sharing options...
gotta_goatsfast Posted August 25, 2012 Report Share Posted August 25, 2012 Not the best idea calling out everyone on the forum as "selfish mother bitch". Here's why you don't get much information.... As previously stated, those who have ported their own cylinders get lucky sometimes and the bike runs okay. The ones that do make more power usually do it at a cost of narrowing the powerband. The real port layouts and designs come from years of knowledge, experience, trial & error, cool mathematics, and lots of money tied up everywhere from tooling to failed experiments. These guys make a living off of port designs and I don't blame them for not sharing all their secrets around the internet for everyone to copy. These companies charge as little as $300 to port cylinders. Tried and true porting... the tooling alone I have purchased for cylinder head porting (4 stroke toys/automotive) costs more than that! It takes more than a dremel and a degree wheel to design a port worth competing. Some advice in shaping metal in general... You'll get a cleaner/smoother "less wavy" shape using a 1/4 die grinder with cartridge rolls than you will with a dremel. When I port iron heads I'll use a carbide burr with 8" shank but with aluminum I can get away with 60 grit rolls to shape the port and then use 120 grit to blend that shape. Some of the cartridge rolls I have are 1" long and about 1/4" in diameter which would be perfect for smaller spaces such as your transfers. In your other thread, the pictures you posted looked decent for a dremel tool. But I still see a lot of imperfections where the radius of metal can be a smoother transition. This is where the die grinder and cutting tools come into play. I would take a small stone cylinder and shape it to the contour I was trying to achieve. Then I would use that to rough in my new shape. I would then use 120 grit rolls to blend everything together. Also, the cuts look wavy and not uniform. It is probably from using a cutting tool that removes too much material and has too little surface area (such as a small carbide). An 80 grit tapered roll would be more managable and would allow you to create a clean straight cut. Good luck with your cylinders but take note that most "experienced" porters will share limited (or no) information. Quote Link to comment Share on other sites More sharing options...
gwinnraptor Posted August 25, 2012 Report Share Posted August 25, 2012 Seems like there a whole lot of selfish mother bitches on here. That sure the hell aint gonna get you anywhere around here. Send it to a site sponsor, most of them do the porting for a reasonable cost (between $250-$400) and they know what the hell theyre doing, there is no guess work involved. A ton of guys around here have used them for porting, so they can vouch for their work. Quote Link to comment Share on other sites More sharing options...
350skabarat Posted August 25, 2012 Author Report Share Posted August 25, 2012 That sure the hell aint gonna get you anywhere around here. Send it to a site sponsor, most of them do the porting for a reasonable cost (between $250-$400) and they know what the hell theyre doing, there is no guess work involved. A ton of guys around here have used them for porting, so they can vouch for their work. Pisses me off when you cheese boys just say send it to a site sponsor. I'm from south africa, let's check. Shipping would be about R1000x2, porting R2000, waiting period probably 2months. It all adds up. Thanx mr "gota gofast" for your input. Much appreciated. I will have a look into my radiuses and try get them better with the methods you mentioned. Quote Link to comment Share on other sites More sharing options...
Coupelx Posted August 25, 2012 Report Share Posted August 25, 2012 Gotta gofast is exactly right, those that know had to learn the hard way. For the last few years I've read every book and piece of info I can find on 2 stroke design. I've also been developing my own bike and have ended up with something that performs respectably. There is far more than just raising port durations and honestly if a broad powerband is what you are after then its the wrong way to go about it. Insulting bhq due to your lack of research is also the wrong way to go about it. Quote Link to comment Share on other sites More sharing options...
gotta_goatsfast Posted August 25, 2012 Report Share Posted August 25, 2012 You may be better off searching the "for sale" section for some used ported cylinders. You'll only be paying shipping one way and there will be no down time due to turn-around. Quote Link to comment Share on other sites More sharing options...
coryv4 Posted August 25, 2012 Report Share Posted August 25, 2012 i like when we get the dumb fucks that ask a question then turn into whiny bitches when people put facts in there face. Quote Link to comment Share on other sites More sharing options...
joey83 Posted August 25, 2012 Report Share Posted August 25, 2012 You're gonna be looking for another set of cylinders from these mother bitches if you eff your cylinders up. Not smart. --Cheeseboy Quote Link to comment Share on other sites More sharing options...
350skabarat Posted August 25, 2012 Author Report Share Posted August 25, 2012 Atleast I'm willing to learn. Am I gana get anywhere by just shutting up? No! Questions are good! Atleast im not sitting on my fat ass posting dumb comments like "I like turtles". Doesn't matter what you say, a forum is there for people to join heads and help eachother. I'm not expecting builders to give me everything! Thanx to "gota gofast" atleast he gave me some advise. Looks like this forum has just become a bunch of guys ripping on people for asking questions. Anyways say what you want I just wanted abit of advise. Cheers Quote Link to comment Share on other sites More sharing options...
coryv4 Posted August 25, 2012 Report Share Posted August 25, 2012 Atleast I'm willing to learn. Am I gana get anywhere by just shutting up? No! Questions are good! Atleast im not sitting on my fat ass posting dumb comments like "I like turtles". Doesn't matter what you say, a forum is there for people to join heads and help eachother. I'm not expecting builders to give me everything! Thanx to "gota gofast" atleast he gave me some advise. Looks like this forum has just become a bunch of guys ripping on people for asking questions. Anyways say what you want I just wanted abit of advise. Cheers we are only ripping on dumb mother fuckers like you because this has been asked a million times. Quote Link to comment Share on other sites More sharing options...
So Cal Suspension Posted August 25, 2012 Report Share Posted August 25, 2012 First off, you fuckers claiming to be a cheese boy need to back the fuck off... Second, 350scab, I thought you did a pretty good job porting your cylinders in the other thread. Do what you want, man. If it doesn't work, it doesn't work. Who the fuck cares. It's your money, not theirs. There have been TONS of people who home port their cylinders. I'm sure all these "builders" ported their first set of cylinders as a professional. Get fuckin' real, people. Dude's in South Africa and wants to give it a go, let him. If you don't have any advice keep your dick suckers quiet. Quote Link to comment Share on other sites More sharing options...
Colby Posted August 25, 2012 Report Share Posted August 25, 2012 First off, you fuckers claiming to be a cheese boy need to back the fuck off... Second, 350scab, I thought you did a pretty good job porting your cylinders in the other thread. Do what you want, man. If it doesn't work, it doesn't work. Who the fuck cares. It's your money, not theirs. There have been TONS of people who home port their cylinders. I'm sure all these "builders" ported their first set of cylinders as a professional. Get fuckin' real, people. Dude's in South Africa and wants to give it a go, let him. If you don't have any advice keep your dick suckers quiet. ah, a useful comment Quote Link to comment Share on other sites More sharing options...
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