turbowrenchhead Posted July 27, 2012 Report Share Posted July 27, 2012 Since you can port your cylinders larger. Can you do the same with the piston? Quote Link to comment Share on other sites More sharing options...
ClayAiken Posted July 27, 2012 Report Share Posted July 27, 2012 I dont think you want a hole in your piston? No you cannot port pistons. Quote Link to comment Share on other sites More sharing options...
Surfrjag Posted July 27, 2012 Report Share Posted July 27, 2012 You can also put a boost port above the intake windows for upper bearing lube and heat transfer. Might even add hp? Quote Link to comment Share on other sites More sharing options...
BB3 Posted July 27, 2012 Report Share Posted July 27, 2012 Like Zilla said....you can open up the windows on the pistons....normally u only want to open up the outside's of the windows though. Do get to hogging on them as the less material on the piston skirt in that area will make them alot weaker and not last no where near as long as they should....plus if one breaks off ur gonna be replacing alot of parts internally. Depending on what i am working with i usually go up .020, down .020 and over .040-.060 over "have gone farther then that before" i never mess with the middle between the windows. Quote Link to comment Share on other sites More sharing options...
registered user Posted July 28, 2012 Report Share Posted July 28, 2012 alot of little things can add up to a big thing but enlarging the windows by itself really wont do much except create a more crack prone area. plan to do frequent inspections if you make the hole bigger Quote Link to comment Share on other sites More sharing options...
BigRed350x Posted July 28, 2012 Report Share Posted July 28, 2012 The primary reason for the piston windows is case-volume filling and to get lubrication to the wrist-pin. You will see maybe 1-2hp by port-matching the pistons, but not much. Not worth the added chance of a skirt cracking and breaking off into your crank. Hell, the pistons I run don't even have the port windows.... Quote Link to comment Share on other sites More sharing options...
turbowrenchhead Posted July 28, 2012 Author Report Share Posted July 28, 2012 The primary reason for the piston windows is case-volume filling and to get lubrication to the wrist-pin. You will see maybe 1-2hp by port-matching the pistons, but not much. Not worth the added chance of a skirt cracking and breaking off into your crank. Hell, the pistons I run don't even have the port windows.... Sounds like I'm gonna leave them alone. I have done a ton or porting on the cylinders. I spent 6-7 hours on them. They look nice now. They are ready for a bore and hone and some new slugs. I just might have the engine running this year yet. Quote Link to comment Share on other sites More sharing options...
Coupelx Posted July 28, 2012 Report Share Posted July 28, 2012 Sounds like I'm gonna leave them alone. I have done a ton or porting on the cylinders. I spent 6-7 hours on them. They look nice now. They are ready for a bore and hone and some new slugs. I just might have the engine running this year yet. Oh this should be an awesome thread. Let us know how it runs Quote Link to comment Share on other sites More sharing options...
ticktock Posted July 28, 2012 Report Share Posted July 28, 2012 Oh this should be an awesome thread. Let us know how it runs Or maybe he knows what he's doing? Quote Link to comment Share on other sites More sharing options...
dave5.0 Posted July 28, 2012 Report Share Posted July 28, 2012 Or maybe he knows what he's doing? Or...... Quote Link to comment Share on other sites More sharing options...
Coupelx Posted July 28, 2012 Report Share Posted July 28, 2012 Since you can port your cylinders larger. Can you do the same with the piston? Because someone who even a slight inkling of what they are doing would not use the phrase ''port their cylinders larger'' Quote Link to comment Share on other sites More sharing options...
n2otoofast4u Posted July 29, 2012 Report Share Posted July 29, 2012 Do you have pics of the cylds? Quote Link to comment Share on other sites More sharing options...
sheerider11 Posted July 29, 2012 Report Share Posted July 29, 2012 I did my own porting on my girlfriends bike. Never again!! It was the hardest, and most time consuming thing I have done. I only did the intake and touched up the transfers. I didn't touch the exhaust or raise any ports. I don't know how port timings work, so that's why I didn't do any of that. And that is where the power is. Just opening up everything doesn't help much. I would also imagine that if the timings are off you would have a very inefficient engine. My girlfriends bike does run awesome. It helped the bike respond a lot better. I also matched the cases to the jugs. But like I said, there is so much more then just hacking away at some aluminum. It took about 8 hours. I felt so accomplished when I finished one, but realized that was half the battle. Now the next one has to match. Quote Link to comment Share on other sites More sharing options...
turbowrenchhead Posted July 30, 2012 Author Report Share Posted July 30, 2012 I'm not claiming to know anything. But I have been a mechanic for a long time. I have done several ports jobs on auto's. I'm sure what I did is going to greatly effect flow. I opened up the port windows and smoothed everything out. I opened up the exhuast port to the sides. I added boysen ports and then I reshaped the bottom of the transfer ports. I look at it like water flowing. The easier the flow more power you will make. If you guys want to go on and rant and rave about how I'm doing my own port job, go for it! Won't bother me any. Quote Link to comment Share on other sites More sharing options...
dave5.0 Posted July 30, 2012 Report Share Posted July 30, 2012 Everybody is busting your balls because we've all done it. It's surprising how much difference it doesn't make. I'm sure it's pretty, my first one was too. Wait till you line up next to a bike that's been ported by somebody that knows what the hell they're doin. You'll understand why we are givin you shit then. Porting a 2 cycle is different than a 4 cycle. Crap with valves just needs to flow. Flow is important on this junk we've got but the real powermaker is getting the timing right so you can cram that extra go juice in the cylinder. Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.