rod ratio question

[Axkiker]

hey im gonna be buying an engine soon. Prolly a dart motor built by bennett racing. Anyways i saw that scat has a new 4.5 in stroke crank out for the 351w motors. that would be a huge jump in ci's but what about the rod ratio. I think it will be somewhere down about 1.3 or so. anywways just currious on your thoughts. Also any suggestions on what motor to get. It will be the 351 9.5 in deck by dart. I was thinking 408 or 427 or bigger with the 4.5 in stroke crank. anyways thanks again

[HotRoddin]

Originally posted by Axkiker
I think it will be somewhere down about 1.3 or so. anywways just currious on your thoughts.

Discussing Rod ratio is like discussing the universe ... you're never gonna get the same answer from any 2 people. My 2 cents worth is stay away from a rod that short ... with a stroke that long the cylinder wall side loading would be to great for my tastes. For a stroker in that motor, i'd stick with the 393 or maybe the 408 at the most, beyond that you are gonna start to have clearence problems and cylinder wall loading problems. If you want to get way up in the big cubic inch stuff, put a big block in it .... with the 460 motors deck height you can go monsterous in size with few issues.
I'm building a 372 long rod motor ... the oil ring is still above the piston pin hole and there are no clearence problems ... will that combo work ??? I'll let you know if i ever get it together? but it seemed like a good compromise to me and if there is one thing i am sure of, its that hot rodding is all about compromise

[DblAdigger]

That 4 1/2 stroke SCAT crank is for a 429/460 big block. I seriously doubt that a 4 1/2 stroke is possible in a Windsor block, no matter who makes it. And, DART is the best.