The test by Clarance Lee was actually more of a review of how the engine was done - -as a performance test? - it simply was not -he said as much - I am not criticizing him .
I hear some good comments about he Poulan - I know nothing about that engine -so I won't comment on it .
I have run the ZDZ50 on 22x10 MenzS and 22x8 MenzS
The ZDZ50 performance was I thought - good - low 7000 rpm's on the 22x8
and high 6000's on the 22x10 --
exhaust was not tuned on these tests but was a very quiet, small JMB can
I don't run the open stack type stuff
or the BCM
The ZDZ50 was NOT designed for that type muffler .
On tuned systems - which that engine was definately designed for -
the power increases quite a bit .
I don't have full power figures using the tuned systems - yet -- so I won't comment more than that.