Recently picked up a Poulan 3800 in awesome condition. But what a friggin turd saw. Has decent low end but super slow. It does have the plated piston and aluminum cylinder and they’re still in great shape. It is an open port cyl.
I’d like to breathe some pep into this thing but I think I need some direction with numbers and such.
I tore it down and got the stock numbers.
With base gasket:
Squish .047
Ex: 98 ATDC
Transf: 120 ATDC
Int: 64 BTDC
Yanked the base gasket and got:
Squish: .037
Ex: 100
Transf: 122
Int: 66
Ideally I’d like another ten thou off the squish but I don’t have a lathe so I suppose that’s that.
As for target numbers, im thinking (maybe):
98
120
70
I’m new to porting so I’m at still trying to get the hang of what numbers work with what saw. I’ve done a husky 262 and a 353 that turned out pretty fun but this saw sort of has me stumped and I couldn’t find much info on hotrodding these older poulans. Any ideas or advice is greatly welcomed and maybe this thread will benefit other members.
I’d like to breathe some pep into this thing but I think I need some direction with numbers and such.
I tore it down and got the stock numbers.
With base gasket:
Squish .047
Ex: 98 ATDC
Transf: 120 ATDC
Int: 64 BTDC
Yanked the base gasket and got:
Squish: .037
Ex: 100
Transf: 122
Int: 66
Ideally I’d like another ten thou off the squish but I don’t have a lathe so I suppose that’s that.
As for target numbers, im thinking (maybe):
98
120
70
I’m new to porting so I’m at still trying to get the hang of what numbers work with what saw. I’ve done a husky 262 and a 353 that turned out pretty fun but this saw sort of has me stumped and I couldn’t find much info on hotrodding these older poulans. Any ideas or advice is greatly welcomed and maybe this thread will benefit other members.