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Re: Crank Measuring part 2
[Re: Moparnut426]
#207239
01/28/09 10:21 PM
01/28/09 10:21 PM
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Joined: Jan 2003
Posts: 1,633 Jacksonville, NC
RonP
top fuel
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top fuel
Joined: Jan 2003
Posts: 1,633
Jacksonville, NC
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Quote:
So I asked about plastiguage earlier, wasnt really happy with my measurments as far a s accurate. So, i used a mic, my crank measures at 2.125 pretty much on the dot. K1 stuff is nice, I dont have an inside mic so I measured them with my digital dial calipers whick I tested with my mic, and its spot on, I had it calibrated erlier this year at a machining shop in town. The rods measure 2.250 without a bearing in it, and each bearing half measures .062. If I add the .062 together it makes .124, that added to my inside measurement of 2.250 makes 2.374, now take that measurement minus the 2.125 i end up with .249. Is this more accurate than plastiguage because I hit .25 almost on the nut. Its a lot of math, and a bit of hassle, but without a dial bore gage its all I have for now. Would you guys consider this an accurate enough measurement, and run it or should I buy a dial bore gage?
or is my math totally messed up? I am not known for my math skills so Im just asking it this will work, dont rake me over the coals if Im wrong. ![](/ubbthreads/images/graemlins/grin.gif)
Kasey
Your math is wrong
Crank 2.125 Rod big end 2.250 bearings .062 + .062=.124 SHould be Rod 2.250 - .124 = 2.126 Rod 2.126(with bearings in) - Crank 2.125 = .001 clearance
Last edited by RonP; 01/28/09 10:22 PM.
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