Deadbeat Posted December 19, 2015 Report Share Posted December 19, 2015 are you going to dyno these Quote Link to comment Share on other sites More sharing options...
Deadbeat Posted December 19, 2015 Report Share Posted December 19, 2015 werent you one of the peeps talking up R3`s...where are these "game changing" pipes at Quote Link to comment Share on other sites More sharing options...
Zillaguy Posted December 20, 2015 Author Report Share Posted December 20, 2015 Yes the bike will be dynoed and dyno sheets will be posted in this thread. As far as the R3's go, the first set is at the chromer right now. They are designed for 500cc and bigger. Quote Link to comment Share on other sites More sharing options...
sleeper06 Posted December 20, 2015 Report Share Posted December 20, 2015 Tom told me the same porting specs for the r3s. I'm not a fan of that low of a blow down so I went with my usual numbers , they ran really well Quote Link to comment Share on other sites More sharing options...
Zillaguy Posted December 20, 2015 Author Report Share Posted December 20, 2015 Tom told me the same porting specs for the r3s. I'm not a fan of that low of a blow down so I went with my usual numbers , they ran really wellWhen i measured just now i got 33° of blowdown. My ex port comes in slightly higher than i would have liked. It's measuring 202°, and transfers are 134°. Damn! I hate screwing up, it is my first though. I give the guys who do this and are masters at it huge credit, it's not easy. One false move, or too much pressure, incorrect cutting speed, angle of the tool to the port hole, and it's over. Quote Link to comment Share on other sites More sharing options...
Zillaguy Posted December 20, 2015 Author Report Share Posted December 20, 2015 Exhaust opens 79°ATDC, and transfers open 112° ATDC Quote Link to comment Share on other sites More sharing options...
bigweav81 Posted December 20, 2015 Report Share Posted December 20, 2015 When i measured just now i got 33° of blowdown. My ex port comes in slightly higher than i would have liked. It's measuring 202°, and transfers are 134°. Damn! I hate screwing up, it is my first though. I give the guys who do this and are masters at it huge credit, it's not easy. One false move, or too much pressure, incorrect cutting speed, angle of the tool to the port hole, and it's over.Shit happens when you party naked. At least you're learning, and capable. Cylinders are cheap, and everywhere. A wise man once told me to leave a mm, and finish up after boring. Just a theory, but the slower you go. The easier the clean up it seems. I agree on giving credit to guys who do this for a living. When you want a port job you think holy fuck 350-400$. Once you buy tools, and try you start thinking.......holy fuck how do they do this shit for 350-400$ lol. I'm all for the do it yourself guys. Keep the curious updated. sent from yo mammy house. 1 Quote Link to comment Share on other sites More sharing options...
Zillaguy Posted December 20, 2015 Author Report Share Posted December 20, 2015 They should still work properly, just not speced exactly how i want. Im thinking 2° shouldn't hurt it. But yes, i have more into tooling than i would have paid to just let a pro port them. The Matco long shank solid carbide burr tool kit was $250 by itself, and only contains 3 bits. Then the old 90° pencil grinder broke, so i had to buy a new one $243 from Snapon and the 1/8 solid carbide burr set was $100. I have the tooling now, so im not going to stop, i have 3 other sets of virgin cylinders to play with if these don't work. Got to start somewhere, and sometime, no better time than now! 1 Quote Link to comment Share on other sites More sharing options...
Zillaguy Posted December 20, 2015 Author Report Share Posted December 20, 2015 Shit happens when you party naked. At least you're learning, and capable. Cylinders are cheap, and everywhere. A wise man once told me to leave a mm, and finish up after boring. Just a theory, but the slower you go. The easier the clean up it seems. I agree on giving credit to guys who do this for a living. When you want a port job you think holy fuck 350-400$. Once you buy tools, and try you start thinking.......holy fuck how do they do this shit for 350-400$ lol. I'm all for the do it yourself guys. Keep the curious updated. sent from yo mammy house. Hey, how'd you know i was doing this naked?! Quote Link to comment Share on other sites More sharing options...
bigweav81 Posted December 20, 2015 Report Share Posted December 20, 2015 Lol sent from yo mammy house. Quote Link to comment Share on other sites More sharing options...
registered user Posted December 21, 2015 Report Share Posted December 21, 2015 if cylinders are same height, using same gasket, all bolts torqued same, degree wheel set deads nuts, you shouldnt have any discrepencies unless you grinded beyond the pencil marks. most people fail because they dont pay attention to the things i just listed Quote Link to comment Share on other sites More sharing options...
registered user Posted December 21, 2015 Report Share Posted December 21, 2015 what may of happened is you put the piston to 80* atdc and drew the line. on small engines the width of the pencil mark can be 1* so you end up going 1* to high . depending on the stroke of the engine im dealing with i stop half to one degree short to account for the pencil width 2 Quote Link to comment Share on other sites More sharing options...
Zillaguy Posted December 21, 2015 Author Report Share Posted December 21, 2015 I definitely went too far on the final clean up cut. Should be good ill just have to match the other cylinder perfect. 202/134 should be a screamer Quote Link to comment Share on other sites More sharing options...
sleeper06 Posted December 21, 2015 Report Share Posted December 21, 2015 There's the first mistake. After doing it awhile I find it beneficial to do both cylinders at the same time , whatever your doing to one do the other . . For example, I use my 1/4 collet burr to cut windows on both intakes rite away and use that tool in both cylinders as long as I can until I have to change tool shape to fluff the ramps . I do the same for each bit . Keeps it consistAnt for sure. Do me a favor send me a pic of the exhaust port with the piston at the top of the transfer windows so I can get a visual of time/area before transfers open . You might need to increase time/area with that low of a blowdown . Whenever you hog the intakes and get more fuel up the tunnels you need enouph area to get get it out before transfers fill cylinder again Quote Link to comment Share on other sites More sharing options...
registered user Posted December 21, 2015 Report Share Posted December 21, 2015 There's a pic on the first page that shows what your asking Quote Link to comment Share on other sites More sharing options...
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