Messages

1

General Two Stroke Talk / YZ 250 EFI

« on: March 15, 2013, 10:51:41 PM »

for the throttle body, since you have the ability to cast and machine, id like to see a rotating arrangement ,like a old  the old ypvs .... think snail cams!, it might take up too much space but there will be a way........very aerodynamic, enought for an exhaust port! so there will be a huge flow increase!

2

General Two Stroke Talk / YZ 250 EFI

« on: March 15, 2013, 10:35:43 PM »

i love the 2 strokes , shame on those who killed them in mx , big applause for those who still work on them like YOU!, 2 small problems , maintaining a 4 amp power at idle:  have a small battery/capacitor to store peak charge for release at idle? nowadays this may not add much weight.
 Since you are setting up efi, why not use a big tuning advantage over carbs, that is,Inputting the e.g.t. into the efi and tuning  to match the pipe will  broaden the peak rpm of the pipe. e.g. colder egt after peak , hotter egt before peak.   there could possibly be a point where it can ,as rpm decreases, change from hot to colder but this would require almost instant egt change (maybe this is possible as it does change very quickly). tuning older 2 strokes with an optak was very effective. cheers and all the best