Whats the biggest crank I can use in a stock block? I have 94 piston with a stock crank which is a 1914. What is the calculation for the CC size?
I just want to be able to put in the largest motor without having to cut the block.


The Wild Kids

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I refuse to grow up therefore I will never grow old, and I will never die.

Try this engine calculator..http://davisracing.com/engine%20calculator.htm Thanks Dave T

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RAJAY + SAND = FUN!!! Can we put a turbo on that??*** Hey look in here for more junk.*** http://s119.photobucket.com/albums/o157 ... ndoffroad/

I think you are stuck with the 69.
Even a 74 crankshaft would require a bit of case trimming.

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Gary

Turbo VW Sand Racer
Polaris Ranger



"If you don't run into the Devil every once in awhile, you must be going in the same direction!"

Davis Motorsports FaceBook Page

Will the 74 fit without having to align bore it and just clearance the sides? Or even a larger crank without having to align bore.

The Wild Kids

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I refuse to grow up therefore I will never grow old, and I will never die.

Align boring and crankshaft clearancing are two different operations.
I can almost say any engine case with a fair amount of time on it will need align bored no matter what your plans are.
Align boring is the process of machining the main bearing tunnel through the case to correct any "pounding" that usually occurs in a magnesium case.
This is the surface where the bearing locates after align boring.


Crankshaft clearancing is just that, removing material in the case to swing a larger than stock crankshaft.
Here is an example.


How far you need to go depends on how big the stroke is.
IMHO if you are gonna clearance one for a stroker crank, might asa well be a big one..........

One other thing, if you go bigger than about 76, you'll need to clearance the camshaft too.

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Gary

Turbo VW Sand Racer
Polaris Ranger



"If you don't run into the Devil every once in awhile, you must be going in the same direction!"

Davis Motorsports FaceBook Page

We also had to clearance the crank with my 84. The counterweights would hit the cam lobes.

Kyle

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2332cc Air Cooled Screaming Meanie. Predator Singleseat.

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What crank do you use Kyle?
Had issues with 86 and 88s but never an 84.........

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Gary

Turbo VW Sand Racer
Polaris Ranger



"If you don't run into the Devil every once in awhile, you must be going in the same direction!"

Davis Motorsports FaceBook Page

78 is the largest that I can use without boring it for a stroker. I know that I will have to clearance for the balancers to clear. So what would a 78 crank and 94 pistons give me?

The Wild Kids

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I refuse to grow up therefore I will never grow old, and I will never die.

78 stroke 94 bore makes 2165cc

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Travis

Thanks Travis, How did you come up with that? I have tried and never get it right. I am missing a step in the calculations.

The Wild Kids

_________________
I refuse to grow up therefore I will never grow old, and I will never die.

Try this engine calculator http://davisracing.com/engine%20calculator.htm

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Travis