Why are you stuffing the transfers? Why would you polish anything in the intake track, you want it rough so as to help keep the charge atomized meaning the fuel suspended in the air, smooth polished surfaces will allow the fuel to drop out of suspension and bead up.
Let me do some clairification here on these numbers.
Why becase I don't want open ports. I'm looking to keep the plenum velocity a little higher plus running a boost port. I'm in the city so stop and go threw to 35-40 if the power range I'm look for. I want. Top end but not at the expense on low power. These grubbee engines need to be cleaned before I use them. I didn't open them up so the crevices in the corner and the face of the cylinder wall is going to be shaped based on port b. I lowered the angles of the roof just slightly pointing just below the spark plug. And the boost is still relatively small with it's angle pointing sharply up. I'll take pictures when I have everything apart.
Grubee engines are usually very good to begin with, and by adding a boost port you've effectively reduced the velocity greatly and these transfers don't have the wall thickness to create a nice smooth radius as that would require enlarging the track area, the best thing to do with these is correct the sidewall angle that's closest to the exh port to match the intake side, increase the roof angle to around 15 degrees and blend the back of the roof into the back wall for smoother flow and proper turbulence in the chamber, if by stuffing you mean you want to create that bump as in example b you will just create a choke point because you can't radius out the outside wall to retain the proper volume in the track now so as not to change the velocity from dropping again to where there will not be sufficient cylinder fill costing you power and being lean/hot running through out the range.
I see what you are talking about. I Understand what you talking about even with crankcase volume which has lead me to do the anyways. Not yet. I have been debating whether or not to stuff the case but I guess I'm going to have to the theory that I think of is that of a restrictor plate and ventri or plenum velocity not so much volume. Which is why I lower the angle just. A little bit with the boost port shallow and. Steep not very wide though. Idk enough about the port itself to decide on the size. I do need to know where I can find the rubber tube they sell with these g2 reed set ups
Check the diameter and then try here.
