good for you. im sure youll be hitting 12,000 rpm any minute now...
and make, maybe, what? 9 horsies or so?
120? was free last time i downloaded it, the links on here somewhere at least five times, and any quick search on google will find it...
*rolls eyes so far back that he can see his own rear end...*
all right, ill come right out and say it, rather than snide implications and innuendos...
if you think you can get 11000 rpm from a HT engine, go for it, but you wont get any help from on here
the few that COULD do it, know its a complete waste of time, if not impossible. therefore, wont be handing out any useful information to achieve results. we will say things like " you cant open the exhaust up to 70% of the bore and/or raise the timing to a nice 170 degrees or so because there simply isnt enough metal there to remove".
we will say "you cant stuff anymore air down a 14mm diameter tube than will go down a 14mm tube"... regardless of what size carb you stick on, physics stays physics... therefore, what good is an 18mm carb on a 14mm tube? or a 19mm carb for that matter? unless the port is bigger than the carb...its a waste of time. bling, gimmicks, and lighter wallets...
the rest will just keep whispering sweet nothings into your ears while you get more and more frustrated or...ambitious. or theyll take your money while smiling
gobbedley-**** is a really good way of ensuring people will give you money. baffle em with BS and its like hitting the jackpot!
ambition is great. so is perseverance and determination! as long as the end result is worth it! cropdusters may dream of winning races... but they cant
get gordon jennings book (download) read it. five or more times. find graham bells book. read that one too. if you cant rewrite both books and condense all the important points into one concise page... read them again. for such small books,they cover so much!
then blairs book. you can just scan that one...its hard to "read" as such...and is actually possibly confusing... makes one go chasing geese rather than concentrating on the basics. its also based on early computer programming, ie...its a uni level textbook for computer modelling of two stroke engines. very complex. so, unless youre conversant with earlier computer languages...avoid.
then reconsider this project of yours
forget about squish bands for now. forget about their angles, their dimensions, and their ratio of squished area to combustion chamber... think about airflow, breathing, and port timings.
you havent even said if you have a decent exhaust on this thing yet... thats the second thing to think about, after port timings...
for conrod stretch, still no definite answer, is there?
why not weigh the piston and pin. figure out the g-forces at 11krpm- pretty easy, you know the stroke and the rpm and the weight...
then get a rod, make a jig so you can hang the appropriate weight off of it, and measure the distortion with a dial indicator...
also remembering the rod isnt as stretched on a 2stroke as it is on a 4 stroke, as its always under compression... its very hard to find any reference to rod stretch in any application other than fourstrokes... 4 strokes have an exhaust cycle.
yes, im nasty. yes, im rude. yes, im negative.
just suggesting to start at the beginning and work your way up, not just dive into the deep end chasing geese... far more rewarding
