I acquired this saw yesterday as payment for some saw work. It's an '07 model that has seen little use. Unfortunately, it had a short life and was straight gassed. I cleaned up the cylinder and will be putting a 353 piston in it, just like rms61moparman did. I ported this one as well. I thought this might interest those of you that want to spend less than what a 346 costs, and still have a nice running saw. I do not yet have the new piston, so it'll be a while before we get to see it run. I'll also be putting a degree wheel on it, and making any necessary adjustments to the port timing. For now, the bulk of the port work is done.
No, the ports aren't all polished and shinny. This will be a work saw, and it's not trying out for any beauty pageants.
Unfortunately, I don't have any before pictures. LOTS of work was done to the transfers. They needed a ton of work to flow like they need to. The intake and exhaust were widened a lot. They're now at 70% of bore. The rear transfers are probably at least 75% wider than they were stock. It sure is nice having easy access to them with the cover off!
Case and gasket matched. This was straight across with no radius. Care must be taken so as to not create a hole, since there's a sharp inside corner on the outside of the jug here.
Both the top and bottom of this divider were beveled.
There was a large hump here that mated with a similiar on in the cover.
This is what you end up with.
No, the ports aren't all polished and shinny. This will be a work saw, and it's not trying out for any beauty pageants.
Unfortunately, I don't have any before pictures. LOTS of work was done to the transfers. They needed a ton of work to flow like they need to. The intake and exhaust were widened a lot. They're now at 70% of bore. The rear transfers are probably at least 75% wider than they were stock. It sure is nice having easy access to them with the cover off!
Case and gasket matched. This was straight across with no radius. Care must be taken so as to not create a hole, since there's a sharp inside corner on the outside of the jug here.
Both the top and bottom of this divider were beveled.
There was a large hump here that mated with a similiar on in the cover.
This is what you end up with.