Hi,

I've search but didn't find the specs for the factory 70 degree cam that
b310gx refered in my datto project.

I've found this list, is it any of this?
http://www.camtechcams.com.au/cat/nissanA12.html?

thanks

daniel

Factory cams are those produced by Nissan.

248/248 A12
248/244 1981-1982 hi torque
256/256 [edited] A12 GX
256/248 [edited] A14/A15 hi power

Then there are the Nissan Competition cams. Since the Wiki is broken, I can't look them up right now.

The 70 degree cam is a sports option part. It's listed in the Sports Option Parts listing for the B210 dated Oct 1 1977, Ref No R/B-210. The part number it's listed under is
13001-h5710. This part number is probably NLA. I've had a couple of cams of this grind here in Australia because somebody had a copy of the Masters, so they could make copies. It was a strong cam, with a wide power band, I had it mainly in an A12 with a 32dgv weber & it'd drive around like a stock engine, then blast off when you opened the throttle. I can't tell you the specs, but if you email Stewart Wilkins Rallying here in Sydney, the man I used to get them through works there. His name is Arthur Jackson, he might be able to arrange to get a cam ground for you, or at least tell you the specifications so you can get it ground there in Portugal.

From my tatty photocopy of B310 tuning manual.

70degree Factory Cam specs at 0.010" valve clearance:
Duration 280degrees
Inlet Opens 38 / Closes 62
Exhaust Opens 65 / Closes 35
Lift at Cam 0.370"

Part no. for the actual factory part was 13001-H5710. 70degree is a fairly mild/fast road cam - 80A (320 duration/0.413" lift) degrees) or 82 degree (328 duration / 0.413" lift) are pretty hairy though!
Cheers

fandatstick, can you list the specs for the other cams?

As far as I can find, these cams were not delivered in any roadgoing cars. They are only in the Nismo/Competition catalogs.

Nismo current catalog lists:
* 99996-H1031: 310 degrees, 0.487 lift
Old Nismo listed
* 99996-H1032: 320 degrees, 0.487 lift
* 99996-H5741: billet
* 13001-H5775: Semi-finished

Japan and North America production models only used one
of the four typical grinds, and not any of those cams. I checked B10, B110, B210, B310 and B120 catalogs. The GX cam (13001-H2300) is the strongest of the production cams (most lift, most duration). It is stronger than the A12T/A14T cam (13001-H5700).