I recently purchased a N-66 head from a Nissan/Datsun inventory liquidator on E-Bay.

He says it is the equivalent to a 260Z head, and it is NOS. How could I go wrong.

Have an F54 short block next to my tired 240Z in Scottsdale, maybe a quick cure?

xstates@verizon.net

N-66??????

N-66??????

I was waiting for that response.

I've never heard of such a head. How about some pictures of said beasty.

Chris A.

I've never heard of it either. I wonder what it's really from? A later Maxima perhaps, although I thought they used modified versions of the N42 & N47.

N-33 looks similar to an E-31 laying around except ports might be a few thousandths larger.

N-33 and NOS - jpegs

E-31 comparison

More #'s on the E-31

started FAST, died slowly???????????????

Any answers?

Probably cc it and measure ports and seats, an an AB test to the lowly E-31.

Actually looks to be exactly what the Dealer said it was. He said many E-Bayer's said no such number.

So much for E-Bay experts. I'm biased, many of the E-Bayers who follow Z's and 24/7: beat-up Sellers and never bid. They are "bottom feeders" as aptly written by a member at this site.

Next step some Manley SS valves, and Comp Cam kit, have the RB cam, and F-54 short block for a relatively complete engine.

Any answers?

Ummm....you said you bought a N66 head. But you posted pics of N33 and E31. Where's the pics of the N66?

This is the best I can do for you....

BORE AND STROKE COMBINATIONS FOR L ENGINES HEAD # VOL. C.C. INT VALV. EX VALV. EXH. PORT PROD. DATE

E31 42.4 42 33 square ex 10/69-7/71

E88 44.7 42 33 square ex 9/71-7/72

N33 47.8 42 33 square ex 8/72-7/73

N33/P50 47.8 42 35 square ex 8/73-8/74

N42 44.6 44 35 square ex 9/74-7/77

N47 44.6 44 35 round ex 8/77-3/78

P81 44.6 44 35 round ex 2/79-6/80

P79 53.6 44 35 round ex 7/80-

P90 53.6 44 35 square ex 12/80-7/82Turbo

P99 53.6 44 35 square ex 8/82-Turbo Hyd

Again, I find no N66 anywhere. And I've looked.

Chris A.

It is N-33, not the other. Intake on a 260Z head is bigger than a 280Z and some ZX's?

Thanks for the info, should work well on a back-up engine and its NOS.

On the E-31, are the centerlines closer on those small valves than the later heads with bigger valves?

rick

On the E-31, are the centerlines closer on those small valves than the later heads with bigger valves?

rick

Good question, I doubt it. It would screw up the location of the lobes on the cam I'd think. I dont have any heads off except a E31 right now or I'd check. I'd think the distance between the valve's OD is probably farther apart on a E31 than say a N47.

Chris A.