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#1
07-30-2020, 02:22 PM
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Crower camshaft ID help
We've got a Crower cam that was installed in a 400 4-bolt shortblock that was purchased about fifteen years ago, freshly machined and assembled but never run.
We're disassembling it to clean it up and check everything out. The only markings on it are 'CROWER' and 'S6800' on the rear surface. Looks to have a lot of duration (fat lobes) so I posted the question here rather than in 'Street' section. I've emailed Crower but no response from them. Do we have a Crower 'guru' (or someone with an old catalog) out there? Thanks in advance for any help. |
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#2
07-31-2020, 05:52 AM
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Well you should have what's needed on hand to degree in whatever Cam your going to run so use that degree wheel to check out the overall spec's on that Cam in question, no?
I mean in all of 45 minutes you can find out what you need to know!
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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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#3
07-31-2020, 08:33 AM
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If the number on the cam starts with a letter it is a custom ground camshaft not a catalog or shelf camshaft. Contact with Crower via E-mail is typically hit or miss. I suggest a call to their technical support staff at 619-661-6477.
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'70 TA / 505 cid / same engine but revised ( previous best 10.63 at 127.05 ) Old information here: http://www.hotrod.com/articles/0712p...tiac-trans-am/ Sponsor of the world's fastest Pontiac powered Ford Fairmont (engine) 5.14 at 140 mph (1/8 mile) , true 10.5 tire, stock type suspension https://www.youtube.com/watch?v=qDoJnIP3HgE Last edited by Steve C.; 07-31-2020 at 08:45 AM. |
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#4
07-31-2020, 01:06 PM
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Talked to 'Shane' at Crower this morning.
He was helpful, confirmed that the 'S' indicated a custom grind, but tells me that their records for custom cams don't go back that far......only to sometime in the mid-1990s, when the sequence started with 'A' and five digits.
Based on the 'S6800' marking, he also speculated that this cam was at least 35 years old - maybe as much as 40 years old. Practically an antique.  He said they can generate a cam card for $20 plus shipping both ways. So in a couple weeks, I'll know what it is exactly and can make a decision as to its' usefulness. Thanks for the input. |
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#5
07-31-2020, 02:30 PM
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Crower will use a "Cam Doctor" or similar product to determine the exact specs of the lobes. A tool for measuring all important features of a camshaft and comparing the results to the published or expected specifications. That said, Steve25 made a good point. Years ago when my engine builder was "dialing in" a camshaft he found it had 2 degrees additional duration than what was published and what was on the supplied cam card. The cam company did not take into consideration the Pontiac journal size when grinding the cam.
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__________________
'70 TA / 505 cid / same engine but revised ( previous best 10.63 at 127.05 ) Old information here: http://www.hotrod.com/articles/0712p...tiac-trans-am/ Sponsor of the world's fastest Pontiac powered Ford Fairmont (engine) 5.14 at 140 mph (1/8 mile) , true 10.5 tire, stock type suspension https://www.youtube.com/watch?v=qDoJnIP3HgE |
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