Atomic Monkey Posted June 4, 2014 Author Report Share Posted June 4, 2014 Got some updated pics, worked on the transfer tunnels tonight Quote Link to comment Share on other sites More sharing options...
Atomic Monkey Posted June 4, 2014 Author Report Share Posted June 4, 2014 Tried to get some light in there for this pic Quote Link to comment Share on other sites More sharing options...
trickedcarbine Posted June 4, 2014 Report Share Posted June 4, 2014 Down at the turn is a bitch. Takes some patience to open transfers up. Quote Link to comment Share on other sites More sharing options...
registered user Posted June 4, 2014 Report Share Posted June 4, 2014 its never easy or fast thats for sure. if you cut in new angles it can get real tedious Quote Link to comment Share on other sites More sharing options...
Atomic Monkey Posted June 4, 2014 Author Report Share Posted June 4, 2014 Yeah, just doing the tunnels was tough without catching the bit at the bottom. The Foredom grinder is what worked the best. Thinking about picking up the 90* tool for it to finish the turns into the cylinders. I don't think I want to even bother with the air grinder. Quote Link to comment Share on other sites More sharing options...
Atomic Monkey Posted June 5, 2014 Author Report Share Posted June 5, 2014 I biased the transfer flow towards the primarys. The secondarys are actually a little bit undercut in relation to the divider, and are angled more toward the boost port. I opened up the "Boyesen" ports as a little more to use them to help "charge" the secondary transfers. The plan is to stagger the port timings, and to depend on mostly using the primaries to charge the cylinder. The primary roof angles are going to be made to match the angle of the piston crown, pointing toward the boost port. The secondary angles are going to drive the charge at the spark plug. I'm hoping this is the right approach! If there's something I could do better, or if I'm going the wrong way, please let me know! Quote Link to comment Share on other sites More sharing options...
Pasi S. Posted June 5, 2014 Report Share Posted June 5, 2014 In my opinion, your work looks very good! Good job! 2 Quote Link to comment Share on other sites More sharing options...
toytech Posted June 6, 2014 Report Share Posted June 6, 2014 I biased the transfer flow towards the primarys. The secondarys are actually a little bit undercut in relation to the divider, and are angled more toward the boost port. I opened up the "Boyesen" ports as a little more to use them to help "charge" the secondary transfers. The plan is to stagger the port timings, and to depend on mostly using the primaries to charge the cylinder. The primary roof angles are going to be made to match the angle of the piston crown, pointing toward the boost port. The secondary angles are going to drive the charge at the spark plug. I'm hoping this is the right approach! If there's something I could do better, or if I'm going the wrong way, please let me know! looks good, you have a steady hand and good eye!!!!!! Quote Link to comment Share on other sites More sharing options...
registered user Posted June 6, 2014 Report Share Posted June 6, 2014 I biased the transfer flow towards the primarys. The secondarys are actually a little bit undercut in relation to the divider, and are angled more toward the boost port. I opened up the "Boyesen" ports as a little more to use them to help "charge" the secondary transfers. The plan is to stagger the port timings, and to depend on mostly using the primaries to charge the cylinder. The primary roof angles are going to be made to match the angle of the piston crown, pointing toward the boost port. The secondary angles are going to drive the charge at the spark plug. I'm hoping this is the right approach! If there's something I could do better, or if I'm going the wrong way, please let me know! nice job and i cant say your doing any wrong. maybe theres a few things for you to consider though. inline twin with cylinders crowded together has a bad side affect of making the tunnels mostly straight up and down. at the top where they make the turn and head into the cylinder your better off making that a gradual turn if at all possible. 90* bend will slow the momentum and energy. so i think youll be better off keeping somewhat of a upward angle into the cylinder so you dont end up with a sharp turn in the tunel. you can start at say 30* and test it then its no problem to lower the angle if you want. but if you start at 10* right from the get go the only way to bring the angle back up is to raise the window height or use epoxy but you dont want to go down that road. intake side looks good but you have alot of sharp corners everywhere. air will go around a corner much easier with a radius and the larger the radius the better Quote Link to comment Share on other sites More sharing options...
Atomic Monkey Posted June 6, 2014 Author Report Share Posted June 6, 2014 There's still work to be done. I do want to go back through and radius some of the edges, and rough-in the port heights so the tunnels into the cylinders are done before being bored. The exhaust hasn't been touched yet, so that will hopefully happen this weekend. Tomarrow I'm going to call F.A.S.T. and see about having them do the boring, and possibly touch-up the porting. The top of the cyls need to be "dusted", and domes need to made as well. While the cylinders are out, the cases need to be split. There is a problem with shifting up in higher RPMs. It would be nice to be able to get neutral while the bike's running too. Then when the cylinders come back, they'll get matched to the to the case. I want to get this thing running soon! Been at this off and on since December. But the hill climbs are coming up, and I haven't even fired up the WR yet. Thanks for all the help and positive comments! Quote Link to comment Share on other sites More sharing options...
registered user Posted June 6, 2014 Report Share Posted June 6, 2014 have someone else touch it up then you take the credit hahah. why not just do it all yourself Quote Link to comment Share on other sites More sharing options...
Atomic Monkey Posted June 7, 2014 Author Report Share Posted June 7, 2014 I prefer to have it done right, over bragging rights. Quote Link to comment Share on other sites More sharing options...
registered user Posted June 7, 2014 Report Share Posted June 7, 2014 i hear ya especially if you have a day job and little time. nights and weekends you dont get a hell of alot accomplished it doesnt seem Quote Link to comment Share on other sites More sharing options...
Russell Wealthall Posted June 8, 2014 Report Share Posted June 8, 2014 The choke points in the updraft close to the Center divider dosnt follow contour of cylinder but flattens out this is the upside wall but can be hogged out 3mm to then get a nice mirrow curve of the liner it helps un chock and stops curve change before exiting my 1cent Quote Link to comment Share on other sites More sharing options...
Atomic Monkey Posted June 9, 2014 Author Report Share Posted June 9, 2014 I'll have to take a look at that when I get to work tomarrow. I was worried about getting too thin so I really didn't touch it. Quote Link to comment Share on other sites More sharing options...
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