[L6 heads; pics and descriptions]

I’m not real familiar with L-series cylinder heads for other markets/countries other than domestic USA market. Though I am pretty certain that this head is NOT a domestic USA head AND it has been modified.

 

1) Injector slots and injector manifold mounting holes along with carb mounting holes indicates post 1975 production.

 

2) The EFI Intake mounting holes “appear†to be 8 x 1.25mm, (Same as the carb and exhaust mounting holes), instead of the typical USDM 10 x 1.25mm, though the pictures could be deceiving and those holes could be the 10 x 1.1.25mm holes. (See picture below showing the mounting hole size difference on an US market N-42 head.)

 

3) In looking at the manifold face, note the 2 bolt hoes above the #6 exhaust port?…. NOT on any USDM L-6 cylinder heads.

 

4) Note the vertical casting lines above and between the ports in the unmachined portions of the head near the valve cover...

 

5) The measurement of the intake port opening means absolutely nothing in identifying that head as it had been “port matched†(opening of the port had been enlarged by hand), evidenced by sanding wrap marks left in the port entrance and the injector slots indicate most of the material removed in the intake port was removed from the roof of the port.

 

6) The casting number had been removed. The picture is difficult to tell but it looks like a sanding wrap finish.

 

7) Pics of the combustion chamber and clear well lit pics of the area surrounding the intake valve guide boss would help greatly in identifying this head, so long as the intake port work did not consist of altering the guide boss.

 

 

N-42 head. EFI mounting holes 10 x 1.25mm, carb mounting holes, 8 x 1.25mm

is not the first head with out code that I have seen. when here in Puerto Rico a group of my friend a lot time ago ran circuit races with a '79 280ZX the cut the head so much that the code desapears and then just like this head they port and polished the ports. So im thinking that it is a N47 Head very cut and port polished.

 

My two cents jajajjaa

[Giving More HP on a NA]

Do this my friend is my combination:

 

N47 or E31 Head with a Felpro Head Gasket

Flat Pistons

Pacesetter Header

3.90 Diff on 14" rims

You will be fast enough

 

If you want more power performance this cpombination with a MEGASQUIRT and you will fly for a N/A

 

With N47 you will get 10.0:1 compression APROX

With E31(best for me) you will get 10.5:1 compression APROX

 

I have now th N47 combination and belive me is fast and cool feeling im looking now for the E31 Head

[ZX won't start! volt meter goes to zero!]

For me your problem is the starter but check all the connections of the starter circuit first

[Photos of my ride and new project]

This are the photos of my ride and the new project becasuse this first Z has too much corrosion and then i buy a new entire body with out engine. So I moved the engine to the new body and now just paint and to the streets.

 

 

First day in my house

 

I changed the hood for this white one because the red was broken

 

My boy one day wake up with th DaVinci syndrome and with a spray he paint the hood to a black one. When I wake up all the hood was black.

 

This my project with the new body

 

 

[my broken motor (vid) 280z l28]

To me sounds like a main bearing problem. You need to take the engine out to make a good diagnostic but for me your problem is in the main bearings like i said.

[my broken motor (vid) 280z l28]

Pardon me people but i don,t see anything abnormal there. If some one can help me???????

[Hello people I,m new here]

^^^^^ jajajajajajajaja not fast enough theres a mountain in the middle and i will crush myself into it if i try it

[Hello people I,m new here]

Later I will put some photos of my Z for you all thanks

[Hello people I,m new here]

Hello people I,m jogaZ from Puerto Rico. I have a 280ZX 1982 coupe in restoration process almost there just waiting for new paint and lets race. jajajaa

 

So I,m just here to meet new Z lovers and all the hybrids Z that you people have and taking ideas for my Z project.

 

If you people want to see my project just click the following link:

 

280zx+The+Beginning

 

See ya around.

 

PD: :)If you want to pass by our page to see how is Puerto Rico in racing go to www.speedclubpr.com the only thing that the speaking language as you know is spanish but you can see our videos and galleries of all the events in our country. I,m a global moderator there:) Thanks again