Let me see if I can get this right.Sluggo wrote:2 liter crank & rods. 94mm P&C. Definite 71mm stroke.DurocShark wrote:Sluggo, you said your engine is an 1800 converted to a 2000? Did you swap cranks too? Reason I ask is, according to http://www.tunacan.net/t4/reference/displace.shtml, putting 94mm P&C on only makes you a bit under 1900. The 2000 has a 71mm stroke, 1700 and 1800 have 66mm strokes.
The stroke of a crank is how far the crank moves the piston within a cylinder. The longer stroke also provides more leverage... The piston is pushing against the crank at a greater distance from its center, taking that leverage and turning it into torque.
"Stroker" engines use a crank with a longer stroke.
You pick up displacement as well as a side effect, but the torque is where the magic is.
If you're using a 2000 crank, you already have a 71mm stroke. Cranks can be bought much larger. Raby sells up to 82mm stroke cranks (!).
I'm considering a 74mm crank for the engine I've got in my garage. $500 and counterweighted. The debate is 94mm cylinders (stock)? Or bore them out to 96mm?
Decisions decisions...
heehee
(I'm going with 96's using the OG cylinders, bored out 2mm.)