CC Specialty Tools Guide to 2 stroke porting“How. To”Tips from TJ on Porting and Polishing 2 Strokessponsored. CC Specialty Tools . Purchase the Porting Tools you need at our Online Store.- . Determine the level of porting you wish to achieve before you start. You need to know what your are aiming for before. Determining this goal up front will also help. Is your goal a basic level of porting. Consider chamfering (bevel). This is the minimum amount of modification I. As for achieving a full. I suggest at a. minimum you invest in a nice porting. Take your time and pay attention when chamfering. Often I see this step treated like a minor detail, rushed through. Chevy S-10 2000 Vortec V6 I have been a mechanic for 40 years, and now I feel like an idiot. I am trying to install a distributor into an engine that has been rotated. You are visitor number since 19 September 1999 Last update 24/2/2002 Details on rotor arm spigot fitting Details on fitting distributor cap to converted VVC head. Eric Gorr Racing offers all-inclusive porting packages for all types of 2-stroke and 4-stroke engines used in dirt bikes, ATVs, snowmobiles, and shifter karts. Eric. The key reason to. This not only extends the life of this particular. Below are some methods to consider: 1. Your approach should. Putting a sharper angle on one side of a port and a more. Use abrasives or other method to further smooth. ![]() Use of a carbide. Remember cylinder liners are generally a much. Cast iron, Nikasil, and so on) than the surrounding. Use a felt buff and buffing compound to. By taking your time an. Don’t go overboard with chamfering. You're not putting a ramp on. Dimensions I like to advise are 1mm to. Here are some online videos that can help you with chamfering. WDKiv- n. Qtw. A ,youtu. UK1kz. Ejw. 1Sg , youtu. Y1. Th. QIr- J8- Radius or. A rounded corner offers a much less abrupt angle to the piston and to. Increasing the radius at the corner of a port opening. It is also a great practice to add at least a slight radius to the. Recess and radius (only. This usually applies to intake. The reason for this is the thinner metal of the bridge will heat. This expansion can cause the bridge to bulge out. Very little recess is needed, about 0. The radius should begin and end approximately 1 to 2mm above and. Keep in mind port. A air/fuel flow that is directed at the center of the piston area. There is softwareout. Also a guy named Tom Turner, on our user's list. TSR ) There are free and low cost options out there now(Bi. Motion. and www. porting- programs. Some have limitations but they can start to show you the. Another. option is purchasing templates that have proven design, and making. Exhaust. Port timing can. The exhaust port timing, and the pipe. In. general the higher the roof, or top edge of the exhaust port window. Typically a pressure wave return time is. If the exhaust port begins to open at 8. If the exhaust port is modified to open at 1. Keep in mind that raising the. The earlier in the cycle that the exhaust. This also. explains why Power. Power valve setups can allow the exhaust. This. will yield a much broader. Carbide. an essential part of porting. Long shank cutters may be able to reach farther, but the shortest. The differing patterns and cut options(diamond cut, spiral cut, and. Alumni- cut) will yeild different results, and for that. We have. several customers that find it necessary to invest in custom carbide. Don't buy into the "CNC. CNC machine. to get your cylinder. CC Specialty has several CNC machines and related. We have clients all over. CNC's to do some of the. We have several customers that do porting work, by hand, that has out. CNC and CAD. design machines and software. There are some other performance enhancers you may wish to look into. Among these are Boost. Bottles / Boost tubes. The addition of boost ports may be another. Turbo and. even supercharger setups. I did witness a 5. I digress).- . Consider the altitude and. Air. Density. When evaluating. Weather. and humidity also play a big role because they can change air density. Temperature will change air density by causing an. As a general rule you should enrich the air/fuel. Fun little side note, our race. CC Specialty got. We. had a monster of a 5. Texas, where this little red and yellow bullet. Alabama for a sponsored race, it. Texas for repairs, and BAM! Mac. Dizzy is. a long time customer and a great source of information on 2 strokes. There are several terms. Mac. Dizzy is also kind enough to provide you with some very useful. As far as information and good. One of the best articles I have found on any. John “Mixxer” Ziehl of Venom Performance and Voo. Doo. HVP. Read this article and check out the excellent illustrations. This guy knows a few things about Porting and Polishing. Follow this. link and be a more informed. I have read some great advice and insight on certain forums. That. being said, I have read a good deal of pure BS and poorly educated. One of my favorite is that porting makes little. I was worried about beating you in a. I would tell you the same thing : ).- Here are some useful resources with several 2 stroke porting theories and formulas. I don't know that I would consider this information the indisputable truth and it is fairly specific to these particular smaller cc cylinders, but it can be a very enlightening as to observable relations in altering 2 stroke port timing, enjoy: Relation of port timing to peak RPM , and Port timing for a specific 4. Piston "ramp" modifications because some guy want to do similar mods, A very DIY way to increase compression , and Port time duration as related to a specific cylinder , and exhaust port shape related to this specific cylinder . This is a pretty good discussion from a long time customer, Eric Gore. Forward Motion. These two links are a great guide, and will help you and. This first link will. The next link will go over some basic principles. I might have a slightly different approach for some of the. This is a great free. Some advice on making a port. I recommend knowing what you got before you start changing it too. Typically I don't endorse too many products, but if you are starting. Sport Port templates can take a whole lot of the guess work. If you are unable to find a template for your project at this site. CNC machines. A template can. At any rate be sure to measure twice and cut once, the aluminum is. When. you are doing major. Increasing horsepower by. Modifications to reed. Take into consideration the pulses that. Expansion. the exhaust are a big consideration! Lubrication and cooling need. Even. the transmission will. A. few videos that. T_BXe. Xo. Gz. D8 ,youtu. U_2. Jk. El. SAis , youtu. XWUo. Ck. GVU , youtu. MNJy. 59. ZId. GY , youtu. Lffv. Ajb. Q ,youtu. UJbtzxt. Pp. Ss , youtu. X- BFqt. 2lw , youtu. RLLb. L4p. AQ4 ,youtu. Mvvdc. 8R9o. U , youtu. Gwtqu. XIAOrk , youtu. WDKiv- n. Qtw. A ,youtu. UK1kz. Ejw. 1Sg , youtu. Y1. Th. QIr- J8, youtu. T_BXe. Xo. Gz. D8. Purchase. Online- -. Here is a handy link. I am not saying it is perfect but it is very. DIY guy out there looking to do some 2 stroke. Porting- the- 2- stroke. Do. it yourself DIY porting and polishing for the beginner and. Here. is a quick video about some of the basic tools I will use for porting. N7xm. KQ0_H7. AComment Section. Submitted by. Anonymous on Sun, 0. Seems. alot of the stuff i read on there, some guy says all i need are some. See. above. Submitted by. Anonymous on Mon, 0. I'll. tell you this much. I started porting 2- strokes with a dremel and a. It'll take. you about 1. If you really want to do it properly, you. I. have two 2. 00. GP1. 30. 0R jet. Submitted by. Anonymous on Sun, 1. I. have two 2. 00. GP1. 30. 0R jet skis that did roughly 6. They ran neck. and neck when me and my wife raced each other. I ended up blowing. I took my. time gasket matching every single intake and exhaust piece. I spent. hours upon hours which turned into days removing the casting flaws. I wondered if I. was wasting my time and if it really made that big of a difference. I. started out enthused but after a couple of days of porting it got. But I didn't give up. When I took the ski out for it's. I couldn't believe it. It was spooky. fast. My ski's top speed only went up to 7. My wife rode it and it scared the crap out of her .. After riding mine neither me nor her wanted to ride hers. I. used carbide bits with a die grinder, sand paper, rubber fuel hose. I purposefully broke to get to the. Oh. yeah and lots of light into the port your working on helps. Thats my. pay off of Porting and Polishing. Submitted by. ccadmin on Tue, 1. Glad. to hear you stuck with the Porting and Polishing to the end, so you. You are absolutely right, it can be. However you. summed it up perfectly when you said “ After riding mine neither me. The power delivery and performance. Thanks. @ CC Specialty Tools. Our. tools are the best option. Submitted by. ccadmin on Sun, 0. The. title kinda says it all, but I will elaborate. A dremel is for wood. Files are great for busting out of. Pro's don't look at it as the cost of the. Bottom line, your better off to.
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