WTB - J 521 cams or cores

1965-1971 Datsun 521 forums. All 520 and 521 topics and discussion can be found here.
emoze
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WTB - J 521 cams or cores

Postby emoze » Sun Jan 26, 2014 1:38 pm

cam cores or sources needed for the 521 J engine

- the cam number is 13001-A3800 - -

you experts would know if the E J H/R16 cam cores or blanks are the same for regrind purposes :confused:

- i was apparently mislead about the MG cam and 311 Roadster cams being essentially the same blank

J cam will regrind to performance specs for an MGB, so just need any suitable J core or blank

need several

LarryM


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Li'l Truckie
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Re: WTB - J 521 cams or cores

Postby Li'l Truckie » Sun Jan 26, 2014 6:41 pm

LarryM,

Okay, you are looking for a cam from a 520 (J13) and not a 521 (L16).

If you want to compare spec on the 311 1500/1600cc and the MGB 1800 then you can go to this website for King Engine Bearing and compare the spec for all three cams. You will need to down load the e-catalog.

http://kingbearings.com/

The J13 info is on starts page 476. Cam is part number CS 309BB, no specs, so they may not make it. No problem, just compare the cam bearing between the three. King does not list any thing earlier than the J so no Es or E-1s, so 1965 to present

I have my PhD class Tuesday night and I need to go by VB to pick up some barrel connectors for my windshield wiper motor so I can take my one cam down and compare it to a MGB and/or MGA cam. The MGA camshaft is the same as the 3 main bearing in the first MGBs.

Li'l Truckie

emoze
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Car: Miata, MGB, Porsche, Manx, 510, et al

Re: WTB - J 520 521 cams or cores

Postby emoze » Sun Jan 26, 2014 8:44 pm

fantastic!

- I'll be glad to have any info you can supply to narrow this down to a purchasable solution

- there are several threads on the MGExperience site that i have gathered my current info from, plus recent conversations with several Datsun parts folks

the basic claim is that the 13001-A3800 cam is the one to get - and a MG supplier I know used to import them -

the various letter & model number designations and parts interchange of Nissan-Datsun engines is stuff that only you insiders know -

Googling that part number turns up a Taiwan supplier (lots of 10) - but i dunno if it is really a correct solution

- i believe that there is enuf market for a lot buy, that i would front the money to do it - but i don't want to own a boxful of cams that don't fit

(I owned a spl-311 back in the late '70s - traded it for a 510 - wish i had both of 'em back)

Larry M
(Ph.D. - IaState - 1980)(yup- an old guy)
http://www.pbase.com/emoze

Thanks Again!

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Li'l Truckie
Posts: 558
Joined: Thu Jan 02, 2014 9:28 am
Car: 3 x '65 PL 320
1 x '64 PL 320
1 x '63 PL 320
1 x '62 PL 320 - parts :(
1 x '60 PLG-222
and many more Datsuns from 48hp to over 500hp
Location: Leavenworth, KS

Re: WTB - J 521 cams or cores

Postby Li'l Truckie » Mon Jan 27, 2014 8:12 am

Okay, Dr. LarryM,

Researched and read the mgb thread on the Datsun/Nissan cam from our northern neighbors and the dudes in the Carolinas. Absolutely no idea why one would regrind a J13 cam over a factory spec mgb cam blank. Money maybe, don't know. But I do now that MGB/MGA cams are readily available, back then and today. Good luck finding a Nissan J or E series cam, as you already know.

So part of your question is if a J13/J15 somehow works in a MGB, then is the opposite true. Cannot not confirm this yet. The camshaft sleeve bearing part numbers are off by a single digit difference.

Found the APT web site but no mention of J13/J15 cams.

Let me do some more research and I'll get back with you on this one. Sooner or later I'm going to need a cam too.

v/r
Li'l truckie

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Li'l Truckie
Posts: 558
Joined: Thu Jan 02, 2014 9:28 am
Car: 3 x '65 PL 320
1 x '64 PL 320
1 x '63 PL 320
1 x '62 PL 320 - parts :(
1 x '60 PLG-222
and many more Datsuns from 48hp to over 500hp
Location: Leavenworth, KS

Re: WTB - J 521 cams or cores

Postby Li'l Truckie » Mon Jan 27, 2014 9:36 am

Good news, just confirmed with King Engine Bearing that part number CS-309 BB and (J13) and the CS-304 BB (MG Series B) are in fact the same bearings with the same specs. They only have a different part number because one is for the Nissan J13 and one is for the 3 x Main Bearing Series B for the MGA and early B. So no difference.

Need to research the timing, lift, and duration of the two.

emoze
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Car: Miata, MGB, Porsche, Manx, 510, et al

Re: WTB - J 520 cams or cores

Postby emoze » Mon Jan 27, 2014 7:39 pm

thanks for trying - at least it adds to the knowledge base

the reason is: - the datsun cam has a more durable pump drive gear - more teeth

the MG cam shaft drive gear is well known for wearing out in 10-20 hrs racing use at high rpm & high oil psi

racer experience is that the datsun cams LAST and LAST - we regrind to our specs - just need cores

i bought a NEW D9 MG cam - gear is worn knife-edged in under 1000 miles of use (6500-700 rpm, 75 psi)

I will buy any J cores I can find so long as they can be reground, and/or welded as needed - DELTA CAMS does it , and so do Paeco

some scca racer-builders use early bronze MG drive shafts - they wear out sacrificially - instead of the cam - good for about 10 hrs, but at least you can fix the problem without pulling the complete engine



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