Stroker motor

[Jarrett#20]

I was wondering what the difference is in a stroker motor and a stock motor? What do u have to have done to your motor to make it a stroker motor? Also i was wanting to know who u think makes the best motors Please list websites if available Thanks alot

[pittboss45]

stroked motor requires crank modifications and case modifications.we have tried many builders and we're sticking with diamond.

[FourPlayBlaster11]

a stroker is a crank thats disasembled and rebuilt with a longer rod, it increses power extremely, i ride for Snyder Motor Sports and i switch motor's frequently, right now i have a 4 mm stroker, and i have a 1.6 mm stoker for natioanls, a 3 mm with a 240 top end, i like the way strokers act, and feel, they dont come cheep however, DIMOND, SNYDER, or set sumthin up with kurt....

[pittboss45]

your talking about 2 different things.. stroked and long rod are two different things.

[|~RaYne~|]

Jarrett#20 said:

I was wondering what the difference is in a stroker motor and a stock motor? What do u have to have done to your motor to make it a stroker motor? Also i was wanting to know who u think makes the best motors Please list websites if available Thanks alot

a stroker motor has longer stroke than a stock motor this meens the rod has more distance of travel.. you must have your cases mechined out for the stroker crank (1mm, 2mm, 3mm, 4mm, etc) they add quite a bit of power but yet cost a lil bit of moucho

[kheft]

FourPlayBlaster11 said:

a stroker is a crank thats disasembled and rebuilt with a longer rod, it increses power extremely, i ride for Snyder Motor Sports and i switch motor's frequently, right now i have a 4 mm stroker, and i have a 1.6 mm stoker for natioanls, a 3 mm with a 240 top end, i like the way strokers act, and feel, they dont come cheep however, DIMOND, SNYDER, or set sumthin up with kurt....

A stroker has a bigger crank. A long rod has a longer rod. Strokers have to maintained very good pecause the rod gets at some pretty good angles. Thats why most are Stroker longrods because it give good power and the longer rod knocks down the angle.

[snydermotorsports]

A longer rod only changes the rod length it does not change displacement of the engine. A longer rod does not make it a stroker engine. It does change the angle and it also changes crank case pressure, becuase you have moved the piston up in the cylinder. The port time has also changed, so now you have to recalculate your port timing. It does change rod angle @tdc.
A stroker engine changes displacement of the engine. If you have a 4mm stroker it means that the piston will go up 2mm and down 2mm further than stock stroke. When I build a stroker crank we weld the crank web pin holes, then relocate the center as desired and machine a new hole. Yes you have to machine the cases depending on how far you want to stroke the crank. I like to radious the B.E. of the rod, so I have more clearance between the rod and the cases.
When you build a stroker engine you again have to relocate the cylinder ports as the port time has changed. All builders have different ways to go about it.
I do not llike to use spacers on stroker engines, I feel it is not needed. I have also seen builders who do. When you don't use a spacer on a 4mm stroker the piston @ tdc will be above the cylinder deck, come out of the hole. Then you have to machine the head to have a recess for the piston not to hit the head.
I hope this helps the understanding. If you have any questions I can try to help. good luck

[Jarrett#20]

Thanks for everyones help. it is very helpful

[bc14]

i have a long rod motor right now and it runs good. by next year i am gettin a 3mm stroker hopefully it will be as fast as they say it is going to be.