rod length calculator. how to determine what a rod length is

is there any sights that can calculate a rod length? i have a bbc standard deck and a rod 6.335 long. i want to know what crank this can work with ? and any other info. thanks

 

depends on the piston pin height,with 1.29 you could use up to 4 3/8 if you use a thicker headgasket.

 

Piston pin height

Piston pin height depends on what your building the motor for. Nitrous, blown, normally aspirated. You asked a question that has lots of variables. Normally with a blown or nitrous motor, you need a taller pin height, n/a can get away with a shorter pin height.
TAFCCREWGUY, if I'm wrong tell me, but if your thinking about sticking the piston out of the deck at TDC, not on a BBC. Leave that for the Chryslers.
chadcox, I think your question is about piston pin height, not rod length.

 

I think he wants to know how big he could build his motor.It might not be proper but my BBC has been .020 above the deck for 9 seasons and no problems yet.Not a big deal.

 

My understanding on a short deck is that 4.375 is about the max stroke, although this is just what I've heard.

 

rod lenght formula

Rod length = Deck height - (Stroke/2) - (compression height) - (distance down hole at TDC)

Note:
-if the piston sticks out of the hole you will add # not subtract.
-Compression height is measured center of wrist pin to top if piston (not top of dome)