Z20(s)

[datzenmike]

Was wandering through the engine storehouse at a local wreckers and found a Z20 engine. What's remarkable is that this one was, at one time, a carburetor engine. No one there knew what they took it out of. I have two Z20E motors, both from 200sx's so fuel injected.

 

I was wondering what cars used an eight plug, carburetor Z20 engine. Well besides the 720 truck. Anyone know?

[datsunfreak]

80-81 510 used that engine. ;)

 

Looks like this:

http://farm1.static.flickr.com/209/511719482_50e2ef4ec0_o.jpg

[gen4maxima536]

yea, the hl510 had it for a time

[datsunfreak]

yea, the hl510 had it for a time

 

That car's not called an HL510. ;)

 

But for some reason everyone in the PL510 community calls it that... :confused:

[nismopu]

I thought the ones in 510's were 4 plug? The one at the former PAW now LKQ has four plugs I believe. Its like the 4th or 5th z20s I have found this year, lol.

[LenRobertson]

I'm curious, were the carb and FI Z20 engines more or less the same, as far as cam, pistons, head, with just different intake manifolds?

 

Len

[datzenmike]

No they weren't exactly the same. The two Z20E (fuel injection) motors I had used 152.5mm rods and 31.75mm flat top piston combination. (long rod) I believe the Z20S used the 35.56mm pistons and 148.6mm rods (short rod).

 

Both Z20E 200sx heads I have, '80 and '81, are both 4 plug design. They are also Canadian. As I understand it all California ones were 8 plug, with the other states changing to 8 plug later, perhaps when the Z22 was introduced in '82.

 

OK then the 510 AFTER the HL510 had the Z20S in it. Was it the HLA510????

PL= L16

HL=L20B

HLA=Z20????

 

Thank you all.

[LenRobertson]

I'm looking at a Z20e in an '81 200SX, with 8 plug head. The car is going to the crusher, and it seems a shame not to save the engine. I was reading a Dime Quarterly article on doing FI to an L engine, using mostly Z20e bits and pieces (although not manifold, of course). I doubt if I'll ever do the conversion, but if I squirrel away the parts, I'll have them if I ever need them.

 

Len

[datzenmike]

Excellent idea! (I have two EFI sets, '81 and '82:D) Initially I planned to put one on my L20B but now I have a Z24 in the truck. The Z20E EFI manifold will bolt to the Z24 head. Woot!

 

Yeah, as I said the California cars had 8 plug because of tighter emissions laws, the other 49 didn't, but did change to them. Information is scarce as the Z engines aren't popular for performance. All I could find was that they all went to 8 plug, possibly the next year ('81) or maybe some states did and the rest followed later, who knows? Pretty sure all Z22 were 8 plug. ('82)

 

Both Canadian '80 and '81 were 4 plug.... This means they had a 4 wire dizzy that will fit the L series engines too. :D

 

Len. The Z20E also has the 152.5mm long rod and 31.75mm piston assy in them. In adition the pistons were flat tops. (with tiny reliefs cut for the valves) The crank is also identical to the fully counterweighted L20B, identical. If you wanted a high compression long rod L20B, these are the parts to put in. Except for minor web changes on the outside of the block and the dip stick hole on the driver's side, the Z20 block is basically an L20B. If you are into L20Bs, the Z20E is a really good parts bin, save what you can from them.

[datzenmike]

That car's not called an HL510. ;)

 

But for some reason everyone in the PL510 community calls it that... :confused:

 

What were the Z motor 510s called?? Need to know for sure.

[datsunaholic]

'78-81 510s were HLA10's. The A10 was the Datsun Violet (160J) and was an evolution of the 710 (which was also a Violet). It was a separate line from the Bluebird line which BASICALLY went 110, 210, 310, 410, 411, 510, 610, 810, 910... skipping 710.

 

The '78-79 HLA10 used an L20B, virtually identical in equipment to the 620 and 200SX of the same years. The '80 510 used a Z20S with 4-plug head in the 49-States (I had one) and 8-plug in California. All '81 510s used the 8-plug head, at least in the US. My factory manual says the 1980 Canadian 510 had the L20B (the book had sections for both engines) but I can't confirm that as I haven't seen any Canadian HL's.

 

The Z22 was introduced for the 1981 model year in 720 trucks (Z22S) and was used through CALENDAR year 1982, which meant some early '83 720s had Z22(S). Later ones had the Z24, 1983 ones were the ONLY ones without the feedback electronic carbeurator (84-86 720s had said feedback carb).

 

The '80-83 200SX (S110) always had fuel injection (the '76-79 S10 200SX was carbbed/L20B). The 80-81 had the Z20E; the '82-83 had the Z22E. I have heard rumor of an EFI 4-plug Z20E but have never seen one- all '80 200SXs I saw had 8 plugs.

 

 

All Z18-Z22 heads have round intakes and square exhaust ports. All Z24 heads have square ports on both sides. However, just like the L-series, the bolt pattern on both varieties is exactly the same and the ROUND intake manifolds work on the squareport heads. Vice versa isn't a good idea.

[datsunfreak]

'78-81 510s were HLA10's. The A10 was the Datsun Violet (160J)

 

Exactly. But when you call it an A10, eveyone goes, "Huh?"

 

I have heard rumor of an EFI 4-plug Z20E but have never seen one...

 

I've owned two, so... :D

 

They were both early production, non-CA, '80 models.

 

FWIW, these are also good EI dizzy donors for L-series engines. They are reputed to have a slightly better advance curve than the L20b dizzy.

[datzenmike]

l Later ones had the Z24, 1983 ones were the ONLY ones without the feedback electronic carbeurator (84-86 720s had said feedback carb).

 

Canadian Z24s must be different due to the smog laws. Seen lots of reg carb Z24s.

 

 

l

I have heard rumor of an EFI 4-plug Z20E but have never seen one- all '80 200SXs I saw had 8 plugs.

 

Again, both Canadian '80-'81 200sx heads I have are 4 plug.

 

http://i138.photobucket.com/albums/q251/datzenmike/motorZ20Eheadsingleplug.jpg[/img]"]

 

Thank you for the info Doug.