Which Rocker Arms To Purchase For A 274F Datsun L6 Camshaft

[jalexquijano]

I recently purchased a 274F Datsun L-6 Cam shaft 107 degrees carbureted with .175 thick lash pads for a 1972 Datsun 240z from Schneider Cams. Anyway they dont sell the rocker arms to be used with this cam shaft. Can someone recommend a rocker arm set that will fit perfectly with this set up and point out a good source for it?

 

Thanks!!

[madkaw]

The lash pad size is a suggestion based on new rockers which are no longer available . What is wrong with the ones on your head now? You can have the old ones resurfaced by Delta cams for cheap. You could also order new Chromemolly ones from RHD Japan for 600$

[jalexquijano]

The lash pad size is a suggestion based on new rockers which are no longer available . What is wrong with the ones on your head now? You can have the old ones resurfaced by Delta cams for cheap. You could also order new Chromemolly ones from RHD Japan for 600$

What about these ones?

 

http://www.ebay.com/itm/NISSAN-DATSUN-200SX-240Z-260Z-280Z-280Z-Z-L20B-L24-L26-L28-ROCKER-ARMS-214-2105-/301379094257?pt=Motors_Car_Truck_Parts_Accessories&hash=item462b9806f1&vxp=mtr

 

They are made by ITM Engine Parts and not by NISSAN. Will this be a problem regarding quality and performance?

[Chickenman]

You'd be better off getting the old arms refinished. The Nissan arms are extremely high quality. With aftermarket you never know what you are getting.

 

If your old rocker arms are in good shape with no grooving or pitting it is safe to re-use them. Use lots of break-in cam lube and use a proper break-in oil like Joe Gibbs " Break In " oil. Contains extra ZDDP which is a high pressure ingredient for cams. Make sure that you do NOT use any energy star oils ( SM or SN rated ).  That eliminates most off the shelf Synthetics below a 10w-40 rating. Never use ANY 0w-XX rated oil... Not enough ZDDP to protect cam surface with a HP cam and stiffer valve springs.

 

Pennzoil 20w-50 ( non-Energy Star ) is also good. The 10w-30 is Energy Star rated...so don't use it.

 

Then, after Camshaft break-in,  switch to a good Synthetic oil with adequate amounts of ZDDP ( Zinc and Phosphorous high pressure additives ). That means most Amsoils ( Their 10w-40 is great, as are their Racing lines ) , Redline, Joe Gibbs Hot Rod Oil, Brad Penn Racing oils or Shell Rotella T6 5W-40 Synthetic for cold weather. The Rotella T6 is a well known oil in the Turbo and Motor Bike worlds. Excellent oil, and because it is rated as a HDEO ( Heavy Duty Engine Oil ) it does not have to be energy star rated.  Racing oils, 4x4 Truck oils and Oils formulated for older cars are exempt from EPA Cafe rules and usually contain more ZDDP than formulations for new cars.

 

Remember, if it's SM or SN rated and is Energy Star rated, don't use it in an engine with HP cam . Go for an SG or SH rated oil ( pre-2006 standards with higher levels of ZDDP ).

 

BobIsTheOil Guy is an awesome site for researching Motor oils. No BS info, and actual Engineers for various Oil companies frequent the site. Search for articles on ZDDP if you are not familiar with the issues that reduction of this ingredient has created for Vintage car owners and Modified vehicle owners.

 

http://www.bobistheoilguy.com/forums/ubbthreads.php?ubb=cfrm