how do you identify a LS & GSR crank?
09-20-2012, 06:22 AM
#27
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Re: how do you identify a LS & GSR crank?
mikesrex... pictures of the cranks just don't seem to make sense with what Shodan or 93egSLEEPER posted...
09-20-2012, 06:39 AM
#28
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Re: how do you identify a LS & GSR crank?
A simple ruler could measure the rod journal diamater and the rod journal to main journal distance. The differences in the various sizes are big enough to figure it out with no more than a ruler.
02-19-2014, 07:01 PM
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Re: how do you identify a LS & GSR crank?
There are.
There's a small flat plate surface on the journal closest to where the crank pulley is. That marking helps determine which crank it is without going through all the micrometer headache.
B1-B4 = LS or B20 Crank
R= Type R Crank.
6 = B16
7 = GS-R
I'll edit this as needed, as I remember this through my builder and still have a couple of B20 and Type R cranks still around. I'm going to verify the B16 and GS-R numbers. I went by this plate system and it worked, as I needed to help out Ron and Project "SHE" with a spare B20 Crank I had left
There's a small flat plate surface on the journal closest to where the crank pulley is. That marking helps determine which crank it is without going through all the micrometer headache.
B1-B4 = LS or B20 Crank
R= Type R Crank.
6 = B16
7 = GS-R
I'll edit this as needed, as I remember this through my builder and still have a couple of B20 and Type R cranks still around. I'm going to verify the B16 and GS-R numbers. I went by this plate system and it worked, as I needed to help out Ron and Project "SHE" with a spare B20 Crank I had left
Just picked up a crank where is says B2 on the plate. Is it an LS crank?
02-19-2014, 08:45 PM
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02-20-2014, 05:13 AM
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02-20-2014, 06:18 AM
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Re: how do you identify a LS & GSR crank?
Sorry man didn't mean to make such a dick post. I was in a bad mood last night apparently. I have used the info in this thread in the past and never been lead wrong. Some people disagreed but I still haven't had it fail me.
02-20-2014, 06:59 AM
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Re: how do you identify a LS & GSR crank?
It's ok that's why I get on here cause I know I'm gonna get the right answer. I picked it up last night for $80. Just getting ready to send my b18c out to ERL
03-18-2014, 11:08 AM
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Re: how do you identify a LS & GSR crank?
found this thread trying to identify which crank was which.. i knew i had 2 LS cranks and 1 GSR crank.. so i started looking at the differences between them.. i've put arrows and such to point out some of the obvious casting differences between the LS and GSR cranks. I also measured the #1 Rod journal and included pics of the measurement.. figured i'd share my findings. the surest way is to use V blocks and dial indicator to measure the actual stroke, but not many people have those tools or access to them.
02-10-2017, 07:22 AM
#42
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02-10-2017, 09:17 PM
#45
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Re: how do you identify a LS & GSR crank?
02-12-2017, 04:17 PM
#47
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Re: how do you identify a LS & GSR crank?
DumpdEJ6, it would have been funny to me if I had gotten the reference !!! LOL I guess I gotta watch more movies... 
12-06-2017, 07:14 AM
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