I have a stock stroke crankshaft that's 10 on the mains and 30 on the rods, but may be offset ground. Is there a identifier for that? Other then measuring stroke? Thanks.
You really need a stock-journal crank to offset grind for a stroker. That one will have some material missing where you need it.
I could have asked that question better. Trying to find out if my crank has been offset ground. During the process, do they add material to the opposite side before grinding and end up standard size, or just remove material from one side and end up under sized?
No, what they do is grind it on a new center https://www.hotrod.com/articles/how-does-offset-grinding-increase-crankshaft-stroke/
Guess its time to measure. This engine has K1 H-Beam rods and Wiesco .036 over pistons, I think it may have been to Jim Burek's shop for this work awhile back.
With wiesco pistons it's most likely a stock stroke.. here are the #s. Stock Buick rod- 2.25 BBC- 2.20 SBC 2.10 An offset grind would be either chevy number.. Take .030 off each per your original post. A dial caliper should be accurate enough for this measurement.
IF you still have the last set of rod bearings that were in it, simply read the part number off the back. JW
All very good info, thank you very much to all. I will probable do some measuring in a few weeks. Funny thing, I found some paperwork on this engine and the F1 rods that are in it are listed as Chevy rods. Hmm, so maybe.
K1 never made a Buick rod to my knowledge, so it is very likely a BBC rod. Now, that still does not mean it is offset ground.. give me the rod length and piston compression distance, and I can tell you if it was stroked or not. I can help you determine both dimensions, if your unclear on how to measure them. JW
