WEIRD Found A Nissan 4cyl, With "Z" on the vlave cover..

[brianglawson]

ok ill try and describe the motor the best i can, but its in a friends shop, it says nissan on the valve cover, but right below that it has a Z on it?? the valve cover looks alot like that of which is on the old nissan crossflow head motors

seen here

"respects to alan for the pic:)"

just the shap of it is like that

it is a rear wheel drive motor, but with no tranny.. it has a single CARB on it, and it looks like it has a decent amount of vaccuum hoses, but i just wanna know what it came from, becasue when one comes up a 510 will be in my driveway, and ill need a motor:)

[Gav240z]

I think this is the NAPS-Z Head found in an early 80's passenger car.

It uses an L series bottom end.

NAPS stands for Nissan Anit Pollution System or something. Look it up in our forums you should be able to find it.

Just found a pic is this it?

[Gav240z]

Bit clearer

[Gav240z]

To answer your query as to if they are any good etc..

They are a emission restricted head with small circular ports, and I imagine the chamber design to be low quench.

I don't think they are particularly great in terms of performance.

Even if the valve cover looks cool. :cheeky:

Gav (Trying to be Alan T # 2)

[brianglawson]

thanks man, any ideas in what they came in? also i suppose they are 2.0? i wonder if i could use the bottom end and a 1.8 head for some high compression?

[brianglawson]

wow after reading a lil bit it sounds like a waste of a crossflow desgin..haha, 8 vlaves, very restricted head, have to work an l series tranny to even work...screw tat lil bugger, but heah i might get it and put it in my room....hahaha

[sblake01]

That motor comes out of the late 510 (A10) 78-81 or the 200SX same years. To use it in a early 510 you'll need the trans from the above mentioned cars because that motor is tilted more than the L series and the trans that goes with it is tilted to match. Oterwise your shifter will come out at an angle if you use the L motor tranny. Putting a L series head on those NapsZ engines requires a lot of work because of the difference in deck hieght. Plus, you'll lose the cross flow aspect. In the US the came as 2l, 2.2l, and 2.4l. There were other versions on this engine in other countries.

[lordbiotree]

Those must be different from the ones we got.

U. S got 2.0 2.2 2.4 hemi heads. They have 2 spark plugs to each cylinder. There in all Nissan trucks from 80-85,86-89 fuel injected (those suck)! Back when they were brand new they were these high fuel economy quick engine.They came in other cars here in the us. Most notably is the 720 Nissan truck. As reliability goes I would never say the are junk! My fathers 84 truck has over 300,000 miles and never had a rebuild or any tranny work.

-Brandon

[brianglawson]

i just spoke with rebello, and they said there most powerful 4cyl is a z24 naps block with a ka24e head, making between 250-280hp, now how do i tell if its a 2.0, 2.2, or a 2.4? hehe

[Bambikiller240]

Originally posted by brianglawson

i just spoke with rebello, and they said there most powerful 4cyl is a z24 naps block with a ka24e head, making between 250-280hp, now how do i tell if its a 2.0, 2.2, or a 2.4? hehe

Bet they charge an arm, leg, and one testicle to get that much power out of that NAP Z based engine/head combination.

[sblake01]

Originally posted by brianglawson

i just spoke with rebello, and they said there most powerful 4cyl is a z24 naps block with a ka24e head, making between 250-280hp, now how do i tell if its a 2.0, 2.2, or a 2.4? hehe

Should be stamped on the block approximately where you would find it on the L engines-just harder to see because of the crossflow arrangement.

Lordbiotree, those are the same engines I spoke of only that the earlier ones were carbed. My 81 200SX did have fuel injection. I have seen import versions of that engine with the same arrangement but with only four spark plugs. I think that was the Z18. I feel that they are good motors to leave stock and run them to death because they do last. It's less expensive to build an L16, 18, 20B.