Was hoping some twin owners would comment on my running video. Oh well.
Maybe its because they run so well there is no need to come here for counsel
OR they all blew up.
To me my #2 sounds fat and powerful whereas my #1 sounds wheezy and ball-less. #2 spill time checked at 24 degrees with exhaust opening at 48. #1 spill was 20 BUT exhaust opening is 43 so I don't know what to think. I have never heard a good running 12/2 so I really don't know. Can anyone post a link for a good running 12/2 coming up to speed? 1 cylinder at a time would be awesome. I posed this question in my other thread but, does anyone know what the reason is for the different exhaust timing in COV versus non COV engines? My non COV 12/2 came with a COV timed exhaust event. Unfortunately the 2 exhaust lobes are at both ends of the spec tolerance (43 and 48). Should I put the 55 back in?
I also learned that there are TWO places where fuel will shut off when spill timing. My theory is that instead of being between the inlet and the helix, I was so loose I was on the other side of the inlet groove. That'll throw off your timing efforts. Does that make sense?
Its been raining here for most of a week. My engine is under a roof but the mechanic isn't and I aint that hardcore. I did get a few hours in here and there. I got an Iphone app called slopro. Claims to be 1000fps capable. It doesn't seem anywhere near that but, at 500fps I'm able to crank and see/hear 1 frame per degree of revolution. Initial results seem promising. I have an old 5.6kw duct heater with three switches so I should be able to do some decent empirical testing. I spent a couple of hours on the interweb and it seems that slow running IDI engines are typically between 0 and 5 advanced. Going to make timing changes (+2,0,-2,-4) with the camera as it will go much faster. If its an epic fail, I'll come back and tell y'all. The camera should help with recording performance results as well. I would definitely recommend to anyone else, spill time it FIRST. I wouldn't even try this if I was cranking by hand either.
I also made a wrench. Looks like a crowfoot with a piece of 1/2 X 1/4 welded on at a 45 degree angle. Helps a lot. I should have plate sanded the mating surfaces between the locknut and the roller. I think that would help expedite things as well.
@Ronmar. I was going by Radio Shack the other day and figured what the hell. Every time I go in Radio Shack stores now I weep a little. I swear that there is one less component cabinet each and every time. HOWEVER they had both parts! So I bought them. I think your doohickey and my thingamabob are going to be pretty close to each other.
Now that I've written all of this, does anyone think I am wasting my time or might hurt my engine? Thanks for any advice you can give me. Please and thank you.