That's very peculiar--assuming your correct one should be technically able to ship out the eccentric shaft and have it tempered. However, bending an E-shaft would seem counter intuitive if I'm imagining it right. Where exactly was the bend and how did you measure it, was the bend .006" from the front or was the measurement dictating that the shaft was out of spec by .006" in the front?
I ask because I would be very surprised that the stresses seen are orders of magnitude higher in a turbo built engine compared to the redline of the eight. Do we have the material mazda uses for the E-Shaft (what specific steel they use, etc)? I'll be happy to look up the stats on the material and see what forces would need to be present in order to deform it. I would also think that the REW's shaft would endure more stresses since it's rotational impulse is higher than the 8's (the .6lbs being more weight that needs to be spun up and down depending on the throttle puts more axial stress on the bearings--though the .6lbs may be of no effect or worry).
While doing google searches I came across this:
Quote:
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One's one piece (OEM), and the other is actually 3 pieces (designed to eliminate e-shaft flex at higher rpms, which again, isn't really a concern unless you're building a race motor that will rev that high and is built to withstand the BLOCK flex you'll experience prior to having to worry about SHAFT flex).
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This is for 20B engines, but I believe the principle is still applicable. Was the original engine Pinned or Doweled?
06-09-2009, 11:43 AM
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