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#1
10-24-2016, 06:33 AM
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421 SD rods
Any one really good with IDing these rods?
I have many of these rubber forged ones, but two other ones I have check out to be 90% of the way to being SD rods. On these two the big end width is .985" like a SD rod. The rod bolt bosses are the taller type like a SD should be . The GM in the I beam is more pronounced then the rubber rods, but still not as highly definded as I have seen in photos of SD rods. The machined nut pad on the cap of the rod is like a rubber rod, not a SD rod, so what gives here? Thanks in advance for any help!
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Wernher Von Braun warned before his retirement from NASA back in 1972, that the next world war would be against the ETs! And he was not talking about 1/8 or 1/4 mile ETs! 1) 1940s 100% silver 4 cup tea server set. Two dry rotted 14 x 10 Micky Thompson slicks. 1) un-mailed in gift coupon from a 1972 box of corn flakes. Two pairs of brown leather flip flops, never seen more then 2 mph. Education is what your left with once you forget things! |
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#2
10-25-2016, 11:54 AM
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SD rods
Hello,I have a set + 2 nos 529238 rods.I had them tested at Callies 25-30 rockwell,also the rod bolt bosses are not 2"+ like early publications stated.
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#3
10-25-2016, 12:25 PM
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Yes, they are not quite 2" , but none the less longer / taller than the standard production rubber rods.
Is your GM in the I beam very well defined?
__________________
Wernher Von Braun warned before his retirement from NASA back in 1972, that the next world war would be against the ETs! And he was not talking about 1/8 or 1/4 mile ETs! 1) 1940s 100% silver 4 cup tea server set. Two dry rotted 14 x 10 Micky Thompson slicks. 1) un-mailed in gift coupon from a 1972 box of corn flakes. Two pairs of brown leather flip flops, never seen more then 2 mph. Education is what your left with once you forget things! |
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#4
10-25-2016, 02:23 PM
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I attached a picture of a 63 Super Duty rod. Are you guys measuring the bolt boss the same way?
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#5
10-25-2016, 02:47 PM
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Yes Paul that is how I am doing it, and mine read a few thousands less then 2" ,and I see your GM stamping looks kind of like how it looks on my two rods, but the G on mine is much much more defined and the M is better than on yours but not as good as the G is on mine.
That rod you show has been confirmed as testing in hardness like a SD rod should Paul, if so could you post up a shot of how the nut pad is cut on the cap ?
__________________
Wernher Von Braun warned before his retirement from NASA back in 1972, that the next world war would be against the ETs! And he was not talking about 1/8 or 1/4 mile ETs! 1) 1940s 100% silver 4 cup tea server set. Two dry rotted 14 x 10 Micky Thompson slicks. 1) un-mailed in gift coupon from a 1972 box of corn flakes. Two pairs of brown leather flip flops, never seen more then 2 mph. Education is what your left with once you forget things! |
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#6
10-25-2016, 03:06 PM
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Is this what you're looking for Steve?
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#7
10-25-2016, 11:41 PM
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421 SD rods
I just checked my nos rods.The bolt boss is 1.998 ,crank end is .985 ,and the GM is very well defined.I remember reading years ago the SD bolt boss is 2 1/16 but all 10 of mine are 2" or less.I tried to add a picture but no luck.
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#8
10-26-2016, 06:23 AM
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Thanks Paul, as that is the shot I needed!
I guess I really need to get those two rods tested for hardness even though I had got them years ago with a SD block with a 990 Crank in it!
__________________
Wernher Von Braun warned before his retirement from NASA back in 1972, that the next world war would be against the ETs! And he was not talking about 1/8 or 1/4 mile ETs! 1) 1940s 100% silver 4 cup tea server set. Two dry rotted 14 x 10 Micky Thompson slicks. 1) un-mailed in gift coupon from a 1972 box of corn flakes. Two pairs of brown leather flip flops, never seen more then 2 mph. Education is what your left with once you forget things! |
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