KaN Powersports Posted October 29, 2013 Report Share Posted October 29, 2013 I spot read this whole thing.... 1-K&T Sold all of those guys the overseas his builds and they paid him to go over there and teach them how to maintain/tune his builds. (His son is there building turbo'ed razors as we speak!!) 2-trap door floors is old!! Suzuki did this in the '70's and the lt250r got produced with them again all through the '80's. Trying to get a wider power range from a piston ported design (Due to poor reed materials available at the time)-Thank the Japanese "Naito and Namura" for that research-as well as almost anything else in 2T Tech. 3-Stepped exhaust ports were invented by a builder in the mid-80's in the USA for smaller cc 4-stroke bike engines, and was sold to an Australian, only after this builder/racer had 10 years of records under his belt. (Common knowledge) 4-Comparing an Engineering team with a performance modder (No matter the engine/vehicle) is just simply a asinine. 5-Yamaha owned the first rotary disced intake motor (An English design), and sold the patents to McCulloch, Who then sold it to Rotax. Yamaha found it to be too bulky, and problematic with multi-cylinder engines, and that the benefits could be compensated for elsewhere... 6-When it comes to Modifying this almost 200 year old technology, Americans have made the biggest numbers, and records that they have been involved with. To the trenching question- 1- The piston/bore are part of the flask. So you are dealing with more than just the area difference of the trench. There are accepatble ratios of CCCR vs. Transfer area Vs CR. Without measuring and checking, you are playing 'roulette'. Will it run? Probably Is it right or ideal? Probably not. 2-Any tuner knows that math gets you close, and it's up to skill and ability to get it right (Even in new developement). 3 Quote Link to comment Share on other sites More sharing options...
registered user Posted October 31, 2013 Report Share Posted October 31, 2013 (edited) 1 i wouldnt know k&t if i seen em walking down the road. im sure theyre nice folks though 2 wasnt talking about suzuki floor ports. more like a door that opens the intake to the atmoshere 360* 3 not sure who invented stepped exh nor do i care. but they do work and have been used on yz250, cr250, rsa, just to name a few 4 if a performance modder cant be somewhat of a engineer also, then i guess youll never get any faster 5 dont know why you brought up rotory disks 6 aparently we agree to disagree on this. i prefer to learn 2t fundamentals from the guys across the pond Edited October 31, 2013 by registered user Quote Link to comment Share on other sites More sharing options...
KaN Powersports Posted October 31, 2013 Report Share Posted October 31, 2013 I just brought in some very old innovations to show how they set the stage for us today... Despite where you are the 2T still is a 2T, and people are constantly trying new, innovative ideas, However, the reason I posted some of the findings above, are because a lot of times people think that these releases are 'new'. When, in fact, they are old ideas-stuck to new applications. Example: The pic posted earlier of the cylinder looks just like a diesel engine's port layout. Poppet valve, and variable valve intakes have been in production and abandoned since the early 1900's. Two strokes main advantage is simplicity-So things come and go, but the proven innovations have been widely adopted....... Quote Link to comment Share on other sites More sharing options...
sprinklerman Posted October 31, 2013 Report Share Posted October 31, 2013 1 4 if a performance modder cant be somewhat of a engineer also, then i guess youll never get any faster 6 i prefer to learn 2t fundamentals from the guys across the pond What kind of racing do you participate in with your Banshee ? Just curious on how you fare against some of the " slower , less advanced" US tuners with the superior technology from across the pond. Serious question. Not inflammatory. Sent from my SCH-R970 using Tapatalk Quote Link to comment Share on other sites More sharing options...
locogato11283 Posted October 31, 2013 Report Share Posted October 31, 2013 What kind of racing do you participate in with your Banshee ? Just curious on how you fare against some of the " slower , less advanced" US tuners with the superior technology from across the pond. Serious question. Not inflammatory. Sent from my SCH-R970 using Tapatalk There answer here is definitely NO racing. Quote Link to comment Share on other sites More sharing options...
LCW Posted October 31, 2013 Report Share Posted October 31, 2013 1 i wouldnt know k&t if i seen em walking down the road. im sure theyre nice folks though 2 wasnt talking about suzuki floor ports. more like a door that opens the intake to the atmoshere 360* 3 not sure who invented stepped exh nor do i care. but they do work and have been used on yz250, cr250, rsa, just to name a few 4 if a performance modder cant be somewhat of a engineer also, then i guess youll never get any faster 5 dont know why you brought up rotory disks 6 aparently we agree to disagree on this. i prefer to learn 2t fundamentals from the guys across the pond Well we know you aren't going to get any faster. Still be waiting on your prototypes... Quote Link to comment Share on other sites More sharing options...
Colby Posted October 31, 2013 Report Share Posted October 31, 2013 You people make me laugh Quote Link to comment Share on other sites More sharing options...
sprinklerman Posted October 31, 2013 Report Share Posted October 31, 2013 You people make me laugh Likewise . Quote Link to comment Share on other sites More sharing options...
trickedcarbine Posted October 31, 2013 Report Share Posted October 31, 2013 Pond? Doesn't scum breed in ponds? So if you went over it to get your info, then came back over it to get home with your info it's already all scummy.... Quote Link to comment Share on other sites More sharing options...
Nieskes Posted November 5, 2013 Report Share Posted November 5, 2013 I just brought in some very old innovations to show how they set the stage for us today... Despite where you are the 2T still is a 2T, and people are constantly trying new, innovative ideas, However, the reason I posted some of the findings above, are because a lot of times people think that these releases are 'new'. When, in fact, they are old ideas-stuck to new applications. Example: The pic posted earlier of the cylinder looks just like a diesel engine's port layout. Poppet valve, and variable valve intakes have been in production and abandoned since the early 1900's. Two strokes main advantage is simplicity-So things come and go, but the proven innovations have been widely adopted....... I like this dude. 1 Quote Link to comment Share on other sites More sharing options...
registered user Posted November 5, 2013 Report Share Posted November 5, 2013 leave it to a parts changer to compare poppet valve to the cylinder on previous page. he doesnt understand how or why it works so i would expoect that sort of analysis. in a conventional cylinder when the transfer port area becomes the limiting factor what do ya do ? Quote Link to comment Share on other sites More sharing options...
sheerider11 Posted November 5, 2013 Report Share Posted November 5, 2013 leave it to a parts changer to compare poppet valve to the cylinder on previous page. he doesnt understand how or why it works so i would expoect that sort of analysis. in a conventional cylinder when the transfer port area becomes the limiting factor what do ya do ?Direct injection? Quote Link to comment Share on other sites More sharing options...
KaN Powersports Posted November 5, 2013 Report Share Posted November 5, 2013 Mighty wide of you to assume I'm just a parts changer. Enlighten us all, registered user. What would you do??? Let's have your take. Quote Link to comment Share on other sites More sharing options...
sprinklerman Posted November 5, 2013 Report Share Posted November 5, 2013 I am currently building a 4 mil with super cub top end 72 bore. I have been looking for a set of cases to have sent out ported and milled to fit the super cub bore. I had a guy from here in Kentucky give me a good deal on a set K&T trenched ported and epoxied 12 mil cases. He told me that they have already been bored for the 72 mil and ported for what I need. I have talked to several guys that say that the bottom end will hold a bigger volume with the trenched cases and it will hurt the compression and be a noticeable difference. I run 200ft dirt drags here in Kentucky. Will the 4 mil in 12 mil cases cause power lose because of the case volume? Any info would be appreciated Mighty wide of you to assume I'm just a parts changer. Enlighten us all, registered user. What would you do??? Let's have your take. Wont happen. He strikes me as the type that gets caught up in minutia that you find prevalent on certain 2T websites but looses sight of the bigger picture. They also dwell on whats "wrong" with what others are doing but can't tell you how to do any better...at least in real world situations. Quote Link to comment Share on other sites More sharing options...
KaN Powersports Posted November 5, 2013 Report Share Posted November 5, 2013 Thanks sprinklerman , was curious what the 'come back' (or his 'building/engineering' solution) was going to be-haha We went a long way from the topic. but I couldn't bite my tongue anymore on the above posts and the "We have better engineers" stabs-haha Quote Link to comment Share on other sites More sharing options...
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