Widen open transfers?

[Zombiechopper]

Is there anything to be gained widening open transfers at the top? Anyone have pics of how they have done it? I suspect it's a waste of time but I'd like to hear opinions.

 

[Adirondackstihl]

Waste of time? No sir.




Oh yeah....

 

[Zombiechopper]

seems like a good spot to stick a little fingery boost port type thingy. Round the corner and come in and up a smidge.

 

[Zombiechopper]

transfers are always a mystery to me. As in, how much and where and why. Just mulling it over.

Would love to see pics of open transfer port work....... Please.

 

[Tpagel]

I have nothing to offer but want to sub in.
I also am curious what you can do to port an open cylinder.

 

[David Young]

just be careful to keep an eye on your ring ends.

 

[drf256]

I'm interested as well. Bet it depends on saw.

Notorious place to catch a ring, and I know some of the best builders here used to widen towards the intake and stopped.

 

[Zombiechopper]

Back when I was doing my first ever port jobs I copied Brad's gigantically widened uppers. Did two saws like that. One is a snarly fast 361 that still runs perfect. The other one was the widest. It was a 461BB kit. It snagged a ring on first startup........so yeah. I don't think the sting of defeat will ever fully go away enough that I would forget to check ring end location again LOL.

 

[Al Smith]

I could never figure out why some cut out the bottom out of tunnels either .I'd think you'd first want to build up a little crankcase pressure and also keep it through the piston window to cool it .For all I know the examples might have been 5 second wonders too,cookie cutters .Made for the quick run,not the long haul .

 

[paragonbuilder]

Subbed. I'm going to be digging into a husky 66 soon.


Sent from my iPhone using Tapatalk

 

[Zombiechopper]

I think all the bottom would ever need is to be matched to the case. I don't see any point in hogging out a divider at the bottom. Maybe rounding it. But hey, what do I know. I'm just a hack. I need a professional to tell it like it is.

 

[David Young]

039 hung a ring

 

[David Young]

44 rancher
Sponsored by jb weld.

 

[smokey7]

I am interested in this as I got 2 jonny 625s to build and a husky 61. I would love some info on which way to go

 

[Keith Gandy]

Subbed!! Ive got a bg55 blower apart ive been pondering the gasket delete and transfer raising and opening the exhaust alil

 

[bikemike]

Subbed!! Ive got a bg55 blower apart ive been pondering the gasket delete and transfer raising and opening the exhaust alil

If you could get an extra 1,000 rpm out of it. It might really blow

 

[Keith Gandy]

If you could get an extra 1,000 rpm out of it. It might really blow

Ive never fooled with porting one but I had an almost new one given to me that dropped a bottom crank bearing . When I took it apart the cylinder maybe had a few hrs on it so I ordered parts and that thing has been sitting on the bench lookin at me and Im lookin at that cylinder thinkin hmmmmm!

 

[Motorhead]

Crude but effective

 

[bikemike]

Crude but effectiveView attachment 15870View attachment 15871

IL post a picture of a 37cc pocket jug I started making a 3rd transfer port and widening exhaust port

 

[bikemike]

Pocket rocket jug 37cc