ORIGINAL: ugly duck
You're down to 45* of crankcase compression timing on your modded motor, down from 65* - I don't know how that relates to the really wicked engines, but I know that too little crankcase compression time means bad things.
You've also increased the exhaust-transfer port offset to 20* from 16*. Adam, would I be right in thinking that for a higher performance motor you'd want to decrease this offset by opening the transfer/boost ports by a greater amount than you open the exhaust port? Or is the exhaust port more important for the high speed motor?
JB, this is an awesome idea. I tried to get this kind of thing going in another thread, but maybe because I'm a newbie on here I'm not going to get alot of response. The only one that got added to my thread was for the Dynamite Mach 28, with 120* boost port, 124* transfer port, 166* exhaust port, and intake port duration of 48ABDC to 50ATDC for 182* total.
Well, that could be because I'm not asking them to tell me what to set it or how to do it, I'm asking them how they like what I'm going to do. I already have been cutting away at a old wore out sleeve I call my test sleeve (I've cut randomly at it to get the feel of the files and how they cut)
Oh man, I forgot to time the SPI, well I'll have to do that tomorrow. I think the SPI is suppose to be around 70-80 degrees of duration. lsurber was the guy I was talking to about the SPI when I was first doing it, but now I think he left RCU, I haven't seen him post in a awhile.
I'm not sure if I'm going to cut the crank that far or not, I still have not got a carbide cutter for the dremel (even though I've been planning on it for months now)
Tomorrow I'll probably start cutting away at it, hopefully it still runs or my Maxx with be with out an engine for a little while.
