What size engine to build with 94mm pistons and case to use

[jcannut21]

I am new to building air-cooled engines. I got pair of J&E 94mm piston kit as a gift. I was wondering what size engine I could build and what case I should use? I dont know if I should use a stock 1600 dp and have it machined or go buy a stronger case? I want to start buying parts to get this motor built by summer.

[Ragman]

Piston/cylinders are either A or B. A's for stock stroke, B's are for larger stroke. So, the size engine you can build will depend on which ones you have. Chances are JE are most likely stroker pistons. Common 94 stoker sizes would be 2165, 2276 or 2332.

Stock cases are more than able to be built up to 2332 fairly easily provided you have a later case, dual relief. If you have an earlier single relief case, it is a lesser candidate for building the monster engine.

Check the engine code on the case, and share, we can tell you what you have based on the code.

[jcannut21]

Ok longer stroke motor I will go with and who has good cylinders to use and what should I do to cool the motor?

[bugguy1967]

If the engine is built correctly, it will not need any special cooling. Some stroker engine have lower running temps than stock. An original German doghouse shroud and German tins will be all you need.

You still need to know what those pistons are for. Stroker/non stroker. It depends on the distance from the center of the wrist pin to the crown of the piston.

Any barrels will work as long as they are honed for those particular pistons. AA and Mahle both make good enough barrels for street use. There's plenty here on The Samba.
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"A petrol engine can start readily, run smoothly and give every appearance of being in good order, without necessarily being in good tune." - Colin Campbell, "The Sportscar Engine"

[jfats808]

2 sets of JE p/c? Nice. You got two so u cam use a set why not. They are high quality p/c set. Got a size in mind? 74-86 cranks will need clearancing. Put some mo.ey aside for a.fully machined case. What ot comes down to is what you want, how you want it to drive, and how much cash u got to budget. Concensus is usually budget 700-800$ on heads and build as big as you can afford with the remainder.
Edit noticed its just pistons. If it fits, AA cylinder sets run about 105$ + shipping, mahle are 175 + shipping.
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2276 IDA's 86C 11-1 DD

[stevensj13]

[turboblue]

[mark tucker]

you dont need the je pistons, those arnt the je pistons your looking for, you can pass on those.I have a used knotched set of 90.5 with total seal rings that you want to trade me for the je's..........is my jedi mind trick working??? with those pistons I would use no smaller than a 86 stroke probably bigger, 88,90,92 honda rod motor.

[jcannut21]

Sorry Mark not looking to trade or sell. I am looking to build a nice size engine. I am still strugglin on what case to use. I want a strong case to handle the power and not crack on me.

[[email protected]]

use a dual relief case, and put case savers in it if they are not there. Use 8mm head studs.

Clearancing depends on the stroke and the rods used. Good rods will require less clearancing than the others.
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