yep read his stuff, is that the one where he takes the Suzuki or Dt motor and runs it on castor oil for days "does more equal less" or somthing like that ? if so what i got out of that was the bore clearances. The oil was oil from what i have read in that regard by him.
HIs big thing that turned the lights on was that 40 thou race clearances were a pile of shit, that you would be in a worse place the more room you gave the piston, even a few jap's did a PHD on that later on and you look at the data and HP was gained by tight tollerances, the heat didnt build up amoung other things keeping the motor in HP and away from heat failures.
well thats was what i got out of that one. I dont remember him talking about thicken up the mix though to get more seal, i remeber the one he did on the Dykes rings etc, that was also interesting. Without rereading the article or another, Im cant comment on the oil thing really, but im not convienced though that thickening the mix in respect to an older bike is going to have such a dramatic effect on performance in this case, i have to agree with MX250 that suspension and other items would play a larger role, if vandy is chasing lap times.
Too much oil will also cut HP through Stanction and the oil drag on the piston so its a fine line if your playing in these levels of gain. I really dont think going to 25: is really going to make much differant to his bike as would a perfectly gapped piston and ring set would.
not sure where you got the ring bit from but i was talking about runing dry so to speak on the ex side when the piston has pulled (not the ring) it either was growing hot or not enough oil, since then i have experimanted with feed hole and put the catch marks on the face, and have never pulled a piston on that side since and relating that info if Vandy was trying to oil up just to get more lubrication, he should perhaps be doing that instead.
any way i guess you answered my Quetion to Vandy anyway, i was trying to get why he was going down into more ratio as it wouldnt be for lubrication which what i though was being aluded to, i needed to understand what was actually behind it.
On that note what's the story with chaps pushing port grooves down in the barrells ? never seen that before but come across a few lately that look like they are trying do some kinda barrel boost by joining the inlet ports to the cases from inside the barrell , whats the theory there ?
