Hi guys people sometimes identify a genuine turbo block by the A8 after the engine number this is a HOLDEN identification number I also dont believe water and oil lines on series II blocks are a true indicator of an authentic vlturbo block what are the GENUINE RB30 turbo casting block numbers from NISSAN which are on the passenger side of the block These are located on the passenger/exhaust side of the block The casting numbers on my block (passenger) 67s ( at the top ) 6051D ( underneath ) 1 or I ( next to the oil return at the bottom ) Question 2 ) how many kgs should a factory vl turbo bare block weigh ? Andrew

No differences in the blocks,Just the latter ones form the factory were drilled so they did not have to worry what went where.(turbo or NA) Cheers Marty

thats not true ... the vl turbo blocks have more meat in them ...an authentic vl turbo block will weigh more than a na block

ive ever actually heard that one. i thought the a8 is the correct stamping and denotes that whats inside is ll of the turbo cams and pistons etc. who told you the casting is different?

Quote: Originally Posted by PISTVL [View Post] thats not true ... the vl turbo blocks have more meat in them ...an authentic vl turbo block will weigh more than a na block Holden state in their release for all 3 litre blocks(turbo and non turbo)That the Engine-crankcase Material Stiffened skirt cast iron with rib Fully jacketed cylinders Yes This was issued November 1985 and revised april 1986 Will hunt up the paper work for the dates the all blocks were revised for the oil and cooling ports for easier assembly on the line. Cheers Marty

86 series 1 blocks turbo & n/a some with water/oil feeds were the strongest apparently. nizpro even said more meat in block casting is different early blocks

Bringing this back up. Is there any clarification to the casting numbers? Besides having an “8” or a “6” which anybody could stamp onto any rb30 Nissan skyline block with inputs for water/oil lines, do actual “A8” stamped blocks have different casting numbers compared to an “A6” or skyline block? Is there information in the service books?