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"B" stamped cam but externally oiled?


Dwigley

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I need help identifying a camshaft.  The L28 in my 240 is from a JDM sedan like a Cedric or Gloria (I think).  First off, I swapped the auto for a five speed and found the hole in the back of the crank too large for the standard Nissan pilot bearing.  Had a bearing machined to fit and finished the retrofit.  Then I found the N42 head was different in that it did not have the injector relief cutouts. Thats when I realized this might be a Cedric L28. I pulled the cam out of that head and found a large "B" stamp on the back.  Turbo camshaft is what the book says. Right?  Well I'm standing there looking at it on the workbench and I notice it's a solid cam, externally oiled.  Well that would make sense as the N42 head was pre-77 and ran a spray bar.  But it has a "B" stamp. Nissan didn't make a turbo before 1977 did they?  Was there a turbo Cedric?  So what is this thing? Also, the B stamp is much larger than what I've seen on the 280ZX Turbo camshaft.  I've searched for hours and can't find any info on it. Thanks in advance for any input.post-1634-0-71893100-1412036460_thumb.jpgpost-1634-0-31270300-1412036558_thumb.jpg

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Pretty sure i just read a thread from an Australian forum about carbed L28's with N42 heads used in the S130 body.  There's a reference to the head also in the L6 Heads FAQ.  Maybe they used a B cam for carb'ed L28's.  I've wondered why the atlanticz cam spec. compilation (is that what you meant by the "book", or is there actually a book out there with cam letter designations?) skips the B.  Tony D probably has details.

 

http://forums.hybridz.org/forum/90-l-series/

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Oh, sounds like you have the same engine I do in my 73, bought from an automatic transmission 1977 Nissan Cedric Corporate Limo. No injector reliefs, carb bolt spacing, external oiled cam. Cam worked great in my turbocharged application for years till I got a true turbo cam.

 

But my crank fit a standard Nissan Pilot Bearing, bought from Naha Prince Motor Co. in 1985...

 

The downfall of the North Americentric publications is they think that because it existed there, it existed everywhere and that's that. Like it was designed and produced in North America. It wasn't. And North Americans are generally clueless on what the rest of the world got, and what existed in Japan in terms of manufacturing and production...the best they can do is guess in most instances, and rely on heresay and gossip.

 

Like one US 'Expert' stating "it was one of the original metal G-Noses".... Love ya man...but you haven't a CLUE what you're talking about!

 

Camshafts are odd bugs, the much vaunted "428 CJ" cam was a standard truck grind with a 4 degree offset dowel in it and a paint stripe put on it in manufacturing to designate the application-specific dowel. I don't know what the hangup is on it....degree it and see what it is if it's that important. Knowing 'application' gives you what?

 

What good is a stock camshaft, other than as a core? Seriously! What? Send it to the grinder and get what you need made. Swapping stock cams is an exercise in futility IMO... for the effort expended get it reground to something GOOD and not a compromise grind achieved through consensus and approved by legal.

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That's the purpose of the post. I was going to list it for sale as a stock Nissan turbo cam but I don't know how to describe the cam. It's in good condition and could be run "as is" if it's a turbo cam. If it's N/A i'll keep it for a re-grind core. Thanks for the input.

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That's the purpose of the post. I was going to list it for sale as a stock Nissan turbo cam but I don't know how to describe the cam. It's in good condition and could be run "as is" if it's a turbo cam. If it's N/A i'll keep it for a re-grind core. Thanks for the input.

Why do you think the "turbo cam" is no good for a core?

 

It's a "Stock Nissan Cam, it has a "B" on the back. External Oiling. Would make a perfect regrind core."

 

There's your description. Supposition gets you nothing but heartache if you're found out to be wrong.

 

Cores is Cores.

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