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Tom Turner · 06-26-2012, 09:06 PM

If your crankshaft grinder does not have a stroke checker, request that he gets one or find a grinder that does. You can check it yourself in the block with a long travel (at least as long as your stroke) dial indicator and a bridge (at least as wide a your bore spacing) Run the piston to BDC and zero the dial. Run the piston up to TDC and read the travel. You can do this with a dial caliper (like NHRA does) but a dial indicator is more accurate. Crank grinders tend to setup on existing crank pins and disregard actual stroke. Make sure your guy understands the concept of "grinding on index" and the importance of the stroke being the same on all throws. Another thing.....only take .014.

06-26-2012, 09:06 PM	#2
Tom Turner Member Join Date: Jan 2005 Location: Lake Tapps, Washington Posts: 137 Likes: 0 Liked 0 Times in 0 Posts	Re: How to check a crankshaft stroke If your crankshaft grinder does not have a stroke checker, request that he gets one or find a grinder that does. You can check it yourself in the block with a long travel (at least as long as your stroke) dial indicator and a bridge (at least as wide a your bore spacing) Run the piston to BDC and zero the dial. Run the piston up to TDC and read the travel. You can do this with a dial caliper (like NHRA does) but a dial indicator is more accurate. Crank grinders tend to setup on existing crank pins and disregard actual stroke. Make sure your guy understands the concept of "grinding on index" and the importance of the stroke being the same on all throws. Another thing.....only take .014.