"If it was a rebuilt 038M, did you use OEM parts or Chi-com parts?"
The history of our 038M saw is long and complicated. Here's the short version:
Basically, I pulled three parts saws from a dumpster outside a rental place. All three were 038's seized up/not running/in peices. I managed to salvage a decent P/C from one of them, put a new ring in it, and between all three parts saws built one running saw.
Since this occured about 20 years ago, the details of the overhaul escape me. I vaguely remember a difference in the P/C's that I was trying to salvage, I'm thinking it was the bore size and possibly the bolt spacing? In any case, without spending but a few dollars (money was tight back in those days as I was raising two children on a very mediocre salary) I was able to get one saw up and running in perfect working order from the 3 scrap saws.
It was a very good saw, decent power and torque. Very high on fuel comsumption, and I didn't really like the choke/ignition switch deal. I obtained a 24" bar for it. It lacked the power of our 480CD which also uses a 24" bar. It was much slower in the smaller stuff we typically cut than our 268XPS with a 20" bar, so it spent most of it's time on the shelf.
I never said it didn't handle a 24" bar well, it was OK with it. Not overly impressive anyplace, and certainly not a really high rpm/high torque saw by any stretch of the imagination.
Running the 038 reminded my of my dad's old Mac 610 on steroids. It simply revved clean and smooth clear thru the power range, with no rush of power anyplace, and a very "flat" torque curve. Certainly nothing impressive enough to make me start worshipping said "lengendary" saw manufacturer. Sorry if the specifics of my experience and details I'm providing aren't exactly what some folks want to hear? Since I had better choices in the line-up for the tops we cut, which are usually much smaller than 24", the old Stihl spend most of its time sitting.
There would be no need to bring down an 038 for side by side testing, I had both at my disposal for over 10 years, the 268XP is lighter, faster, and just a better overall saw in just about every area, IMHO......Cliff
PS: If you want to bring down your street car, my GTO and I are up for that, we can wonder over to our local track, I LOVE a good drag race!