This is simply not true. In fact, the opposite is true. The higher the compression, the less advance you can run, or need to run.Compression loves more timing. The more of one then the more of the other.
I'm not saying u can advance it 3 inches but u can the width if the key. My 64 has to key ways increase the flywheel I've had it in the other one by accident and it still ran not very well but it did. Compression and timing are limited to detonating that's it. On 93 octane gas a 14:1 motor has to run less timing than a 10:1 motor u are correct but only because of detonation. Now what that has to do with a chainsaw I don't know.This is simply not true. In fact, the opposite is true. The higher the compression, the less advance you can run, or need to run.
Were you able to get those numbers without epoxy in the intake?
Mine is a red light cylinder and I can't remember how much it's lowered but it enough that I had to do some work to the plastic to get the sparkplug out and the intake was still barely in the 70's. I think it's 76 now. A 660 cylinder would b in the high 80's.It was the old flat top, non decomp 066 cylinder, the port timing numbers where much better to start with than the new 660 cylinders. That's basically leaving the intake timing alone with cutting 0.030" out of the squish band.
I believe I lowered mine .072Mine is a red light cylinder and I can't remember how much it's lowered but it enough that I had to do some work to the plastic to get the sparkplug out and the intake was still barely in the 70's. I think it's 76 now. A 660 cylinder would b in the high 80's.
Wow I've never tied it that low, seems to work! My new favorite for a beast is a 394 and it's basically a stihl only with way better numbers, I think it's around 77 and it's bn lowered enough that I had to make a new hole for the decomp. Think I'll break out the jb weld after while!I believe I lowered mine .072
Yeh I can't lower mine anymore. I got lots of piston left on the 394 though. After machine work the exhaust was 109 wish them stihls had that problem.Not many Pistons will allow that much but luckily this one did, I actually have a little room left
Yeah, it wouldn't take much to get my 660 out from under meI'm finally getting a flat top 66 there a very rare item around here, it's costing me a 660 but I've got several. It was seized basically brand new and has bn in a box for 20 years. He thinks he's got me over a barrel but honestly I'd trade 2 660's for it there a dime a dozen around here
Yep every other saw u gotta raise it. I don't even touch the exhaust or intake on a 660 anymore unless it's for someone i don't know, I don't want them to take it apart and c nothing. I don't widen or ruff up or polish just raise the transfers and clip the lip on the lowers and add bridge ports. Can't tell a bit of difference either066/660 is the only one I know of that has a hard time gettin ex. Low enough.
They don't mean anything to me hell everybody has 4 or 5 of them, now a flat top on the other hand.Yeah, it wouldn't take much to get my 660 out from under me
I in no way have the amount of work u have but it can still become overwhelming.I just do the best I can. I get behind........then I catch up. People normally understand. I never shy away from communication.
Enter your email address to join: