Mastermind
Work Saw Specialist
I've had this Poulan 330 for some time now trying to find some parts to make it run again. After searching high and low without any luck one of our fine members sent me a complete Craftsman version of the 330. Thanks Volks-man!!!
Here's the Craftsman after I got it down and checked the port timing and squish.
The stock numbers are:
Intake duration: 144°
Exhaust duration: 155°
Blowdown: 25°
Squish = .028
These aren't bad numbers for a work saw, should make plenty of torque and rev up good as well. The thing is, I'm building this saw more to pull out at a GTG and surprise people with.
I ordered a new set of crank bearings today so it will be a few days before it gets back together. In the mean time I plan to clean, clean,clean, plus do some matching of the cases and jug...
The first thing I noticed was the huge difference in the jugs. On the left is the Poulan jug. It is a plated jug with way more transfer tunnel area. The base also has a different bolt pattern than the Craftsman. The right hand jug is from the Craftsman, this saw has a plated piston and an un-plated jug.
Here's a shot of the pistons.
The stock intake port.
Exhaust.
Here is a shot of the case and jug. Notice how mismatched these two parts are. I'll unshroud the case here when I begin porting.
Another difference between the Poulan and the Craftsman was that the Poulan was sporting a rim drive.
I'll be adding to this thread for the next few days, hopefully we'll end up with a running saw in the end.
Here's the Craftsman after I got it down and checked the port timing and squish.
The stock numbers are:
Intake duration: 144°
Exhaust duration: 155°
Blowdown: 25°
Squish = .028
These aren't bad numbers for a work saw, should make plenty of torque and rev up good as well. The thing is, I'm building this saw more to pull out at a GTG and surprise people with.
I ordered a new set of crank bearings today so it will be a few days before it gets back together. In the mean time I plan to clean, clean,clean, plus do some matching of the cases and jug...
The first thing I noticed was the huge difference in the jugs. On the left is the Poulan jug. It is a plated jug with way more transfer tunnel area. The base also has a different bolt pattern than the Craftsman. The right hand jug is from the Craftsman, this saw has a plated piston and an un-plated jug.
Here's a shot of the pistons.
The stock intake port.
Exhaust.
Here is a shot of the case and jug. Notice how mismatched these two parts are. I'll unshroud the case here when I begin porting.
Another difference between the Poulan and the Craftsman was that the Poulan was sporting a rim drive.
I'll be adding to this thread for the next few days, hopefully we'll end up with a running saw in the end.