L6 Heads and Blocks
From Factory 4 R And D
This page contains information in regards to the Inline 6 Nissan L-Series Heads. For information on the Inline 4 Heads please visit L4 Heads and Blocks.
The Nissan L-Series Head came out on a variety of models ranging from the late 60's through late 80's. During its extensive run there have been a number of iterations and variants made. The feature below is by no means a complete list but is enough information to make an informed decisions in regards to appropriate head use or a foothold to base calculations off of.
[edit] L6 Head Combination and Details
Head | Model | Year | Engine | Block Casting Code | Pistons | Head | Volume (cc) | Intake Valve (mm) | Exhaust Valve (mm) | Exhaust Shape |
---|---|---|---|---|---|---|---|---|---|---|
E30 | C110, C210, 240Z | 1977 | L20A,
L24 | E31 | Dished | E30 | 37 | Small | Small | Square |
E31 | 240Z | 1970 | L24 | E31 | Flattop | E31 | 42.4 | 42 | 33 | Square |
E88 | 1971 | P30 | Flattop | E88 | 44.7 | 42 | 33 | Square | ||
260Z | 1974 | L26 | ||||||||
N42 | 1975 | N42 | Dished | N42 | 44.6 | 44 | 35 | Square | ||
N47 | N47 | 44.6 | 44 | 35 | Round | |||||
N42 | 280ZX | 1979 | L28 | F54 | Flattop/Dished/Siamesed | N42 | 44.6 | 44 | 35 | Square |
P79 | P79 | 53.6 | 44 | 35 | Round | |||||
P90 | P90 | 53.6 | 44 | 35 | Square | |||||
P90A | P90A | 53.6 | 44 | 35 | Square | |||||
P81 | - | 1979 | - | - | - | P81 | 44.6 | 44 | 35 | Round |
P99 | - | 1982 | - | - | - | P99 | 53.6 | 44 | 36 | Square |
N33/P50 | - | 1973 | - | - | - | N33/P50 | 47.8 | 42 | 35 | Square |
05L | C210, HR30 | 1980 | L20ET | - | - | 05L | 37 | 38 | 33 | Square |
Y70 | C210, HR30 | - | L20ET | - | - | Y70 | - | 38 | 33 | Square |
[edit] Note
As stated previously, the list is not complete. Some omitted items include;
- The R30 N47,
- The R30 E88E,
- The Cedric 2300 block and head,
- 240C combinations,
- 260C combinations,
- 280C combinations,
- And the Patrol combinations.
It is also important to note that the F54 blocks vary in water jacket sizes.
- The 280ZX possesses the smallest of the F54 water-jackets, arguably good for overboring but 89mm + results in thin cylinder walls before water-jacket contact.
- The 280C Cedric contains F54 jackets of the next size up. These blocks are few and far between due to the limited number of cars containing them.
- The Patrol has the largest water-jackets of all F54 blocks perhaps to ensure that the potentially hard-worked engine could sustain the expectations of a 4x4 offroad vehicle. This block is especially ideal for turbo applications as its ability to pass a larger volume of water and subsequent heat dissipation can allow for added performance in high end installments.