if i add a +3 crank to my engine,are there any other mods i need for this to work? or could i just buy it and put it straight in and just have to jet? thanks in advance.
+3 crank question
- Thread starter twostrokefolks
- Start date
You should/would have to port it to match the ports a little more, maybe not if you use the spacer plate.
You can put it straight in and just use the spacer plate and it will be good no jetting changes needed usually
I would recommend that you have it ported to match and send your head to KOR for a rechambered head. Especially if your going to spend the money for a stroker crank.
what if the motors already ported ?
i dont see any harm in a stuffer block. granted its just another oppurtunity for an air leak, but if its installed correctly, i see no issue in reliabilty.
havent tons of guys on this forum ran them with no issues ?
i am currently thinking about adding a +3 and a stuffer block in the mix.
stratton.
i dont see any harm in a stuffer block. granted its just another oppurtunity for an air leak, but if its installed correctly, i see no issue in reliabilty.
havent tons of guys on this forum ran them with no issues ?
i am currently thinking about adding a +3 and a stuffer block in the mix.
stratton.
Help me here, it is late and my head is foggy. What do you mean by "Stuffer Block"?
Can you show me a picture?
Steve
The stuffer blocks are built onto the plus 3 crank. There the blue part you see on the crank. The stuffer block reduce the volume of the crank case area so the pressure stays up. The piston coming down makes compression in the crank case and that is what forces the gas threw the ports into the combustion chamber. The pressure helps atomizes the fuel going into the cylinder.
Ok, I am used to just calling that a "stuffed crank" because the plastic parts are not easily removable. Our Vitos cranks come that way, and I am used to using stuffed and unstuffed cranks in my KTM:
The term "Stuffer Block" is usually reserved to an intake port or reed box block like in these pictures:
In place in the top two pictures, Available in different sizes for different effects.
These were for the carb side, sometimes they are available for the intake side as well.
None were available for the Blaster so we filled the intake box with 3 tubes of epoxy for the same effect:
Quite the opposite of what most people are doing to their intake.
Red is where the epoxy was applied:
The effect is substantial. Usually increasing the low and midrange power without hurting the top end. In effect broadening the powerband.
Steve
Ok, I am used to just calling that a "stuffed crank" because the plastic parts are not easily removable. Our Vitos cranks come that way, and I am used to using stuffed and unstuffed cranks in my KTM:
The term "Stuffer Block" is usually reserved to an intake port or reed box block like in these pictures:
In place in the top two pictures, Available in different sizes for different effects.
These were for the carb side, sometimes they are available for the intake side as well.
None were available for the Blaster so we filled the intake box with 3 tubes of epoxy for the same effect:
Quite the opposite of what most people are doing to their intake.
Red is where the epoxy was applied:
The effect is substantial. Usually increasing the low and midrange power without hurting the top end. In effect broadening the powerband.
Steve
Thanks for that good info. Have some rep.
