Low end torque - 4 stroke vs. 2 stroke

[77SceptreOB]

Wanted to get some opinions on this subject. Assuming the HP is the same, say 225hp for this discussion. From my practical experiences there seems to be a NOTICABLE difference between the 2 stroke and the 4 stroke when if comes down to low end torque. Given the same boat, with comparable weight and prop sellection, the 2 str. seems to jump on a plane a lot faster than the comp. 4 stroke. The 2 stroke winds up faster also. The 4 strokes seem to respond slower out of the hole but preform equal after about 10 seconds when steady on a plane. I know the 4 strokes weigh more when compared to the 2 stroke, but the powerband/torque curve must be different too, to make such a difference when comparing engines of the same power rating.

is everyone elses experinces similar??

[Bigshrimpin]

The Suzuki 250 has a TON of bottom end torque and a HUGE diameter prop.

[joema]

yep

[76Red18]

2 stroke all the way!!

[Bigshrimpin]

Don't get me wrong . . . I love two stroke motors (especially old lightweight stinky ones with a LOT of power), but the Suzuki 250 is very impressive.

[76Red18]

Don't get me wrong . . . I love two stroke motors (especially old lightweight stinky ones with a LOT of power), but the Suzuki 250 is very impressive.

Big, I wouldn't have thought otherwise

[76Red18]

I heard some bass fisherman have those new 4 stroke V-Maxs' strapped to the back of their sleds and love em. Those guys are all about hole shot as much as top end.

[workinpr0gress]

Wanted to get some opinions on this subject. Assuming the HP is the same, say 225hp for this discussion. From my practical experiences there seems to be a NOTICABLE difference between the 2 stroke and the 4 stroke when if comes down to low end torque. Given the same boat, with comparable weight and prop sellection, the 2 str. seems to jump on a plane a lot faster than the comp. 4 stroke. The 2 stroke winds up faster also. The 4 strokes seem to respond slower out of the hole but preform equal after about 10 seconds when steady on a plane. I know the 4 strokes weigh more when compared to the 2 stroke, but the powerband/torque curve must be different too, to make such a difference when comparing engines of the same power rating.

is everyone elses experinces similar??

as a rule of thumb 2 stroke has a great holeshot but poor low end torque and a 4 stroke has good lowend torque and a poor holeshot, relatively speaking... A lot of time people confuse holeshot with lowend torque... But running the right prop and having a lighter boat tends to mask a lot of it

[76Red18]

I'd have to disagree when it comes to outboards. A 4 stroke won't spin the same prop as easily as a 2 stroke on acceleration. The 2 stroke will rev quicker.

[Old'sCool]

You would be surprised how much the variable valve timing on the new 4 strokes helps. That and Suzis 16" props is very impressive.