Super Jet Need help, building 5mm stroker engine.

[Dustin88]

Looking for some info, I have a 62t bottom end with a Pro-tec 5mm stroker crank with I think stock length rods. It curently has a old school 6m6 cylinder on it that has been race ported and is running a 82mm piston. The engine runs great up top but has no bottom end. It currently has a spacer between the cylinder and cases.

I am looking to build a budget freestyle engine out of it, what cylinder would work good with the stroker crank? 61x, 62t, 760 cylinder? Should I run a space, is so what size?

I tried searching but didnt find much info on building a stroker.

 

[eyeless]

if you have stock lenght rods i reckon your spacer is the correct size with that 6m6 cylinder. you could fit any cylinder on there with the same spacer.
Are you sure your lack of bottom is not due to some other facts ie mechanical fault at carbs, air leak etc?

Anyways if you want to change your cylinder, i would go the 61x way and send it to groupK, art at jetworks or other peoples who can do the cylinder port work, that will give you more than any stock cylinder.

 

[davidescu_radu]

same problem for me: i have a plus 5mm crank - with stock rods and 62t cylinders at 84.75mm - how is the best way to make an engine from it? have also ada head - can cut the domes but need more info?

 

[Chris V]

call PRO-TEC ask for Carl.. he was the builder/ designer..

 

[x2mafia]

send it to @holeshot

 

[holeshot]

By far your best option is to have a builder set it up with either a 701 62t or 760 cylinder. The cases will need to be decked to correct port timing and recessed domes will be needed. A stroker baseplate should not be used with a 5 mil shortrod unless your focusing in mid to top end power and even then some dome recess would be needed.