Basic LZ22 Build w/ Flat Top SSS SU

[jvb5577]

Thanks for the info!  I'll get a new sprocket so timing can be exact. 

[Sealik]

Thanks for the info!  I'll get a new sprocket so timing can be exact. 

 

 

Buy the whole kit

[jvb5577]

Well took everything just about apart to see how it was.  Front timing cover is broken :sneaky:   No wonder there was so much RV sealant around this.  Also one of the threads that hold the head to the block seems to be stripped on the block.  It is one of the middle ones.  Bolt came out but upon inspection I can see they are rounded in the head.

 

Here are the pistons

Pretty clean and smooth

 

The valves look nasty

 

You can see the bottom middle bolt is oily, that is the one that is stripped in the block

[Stoffregen Motorsports]

I bet the block is cracked. That's why the threads stripped.

[jvb5577]

I gave the block a good look threw and didn't see any cracks but to be positive this thing would need to be hot tanked. 

[jvb5577]

Going to be picking up a Z22E block today for $150 complete.  :D   Pictures will follow once I get it back as it is still in the vehicle '82 200sx.

[heretic]

:rofl:   What are you planing for your build?

 

:) single sidedraft LZ23 

[jvb5577]

Do you already have your Z motor?

[heretic]

I have not.

 

My initial plan was to use a Z22 but now I'm contemplating a Z20. I'm watching your thread close :))   

[jvb5577]

Well here it is.. The Z22E

 

 

All the intakes are clean

 

This is where it sits at TDC

[jvb5577]

Got the head off.  It will be for sale if anyone is interested.  It is fuel injection.

 

[K_trip]

- removed -

[jvb5577]

Okay guys and gals,

 

I am going to start to collect parts for this build.  I am planing this from the jason grey:

 

Big Bore 2.3L

KA24 pistons into a bored Z20/Z22/L20B block. The small 2.8cc dish area of the KA24 pistons helps to preserve compression ratio even with the low piston deck height. Compression ratio with a open chambered U67 head is 9.9:1 or use dished Z24 pistons and peanut chambered head for 8.9:1 compression ratio.
Parts: Z22 crank, KA24 pistons, Z22S/ L20B rods in a +2mm bored Z22 block or +4mm Z20/L20B block.
s/2+r+p= 92/2+145.9+34.0= 225.9 mm
piston deck height: -1.55mm below deck

 

 

I have some questions. 

What would be a good cam to use for this setup?  Say I am going with the U67 open head.  Also going to use as a DD

What valves, springs, ect. should be fitted to the head?

Can I use the Z22 alternator?

I need the KA24e pistons out of a truck?

[Dawa]

so you havent decided on which block huh?

[jvb5577]

I am going to use the Z22E block, guess i forgot to mention that.

[jvb5577]

Just took the pistons out.   Rings seem to be in good shape.  I noticed there are a lot of drill marks on the crankshaft.  Is this like this out of the factory or did someone balance it?

 

[Stoffregen Motorsports]

Those are factory balance holes. Most shops balance by grinding away material. Nissan/Datsun engines are famous for being within 4 grams balance anyway, so unless you're changing rods or pistons, I would leave it alone.

[jvb5577]

Thanks!

 

Okay I have been looking for a set of KA24e pistons.  Don't want to spend anywhere near $400.  Should I just go with stock pistons from a D21 or 240sx?  OR will a pair of cheap ones that go for $150 with pistons and rings be recommended?

 

I still need the cylinders measured, if they are well within spec I may just have them honed and new rings on the pistons to keep cost down for say a R1 carburetor setup?

 

Why does there have to be so many options to this build :hmm:

[Stoffregen Motorsports]

There are three different sytle KA24 pistons that I can remember; early pistons, late pistons and 16 valve pistons. The dish is different on all of them.

[jvb5577]

Good to know.  I am pretty sure I need the early ones from the KA24e?

I have the block bare and was looking at the crankshaft bearings.  One is worn down the the brass looking finish.  Should these be replaced? 

[banzai510(hainz)]

if your that far just replace the bearings with new ones.

99% of the time STD size bearings.

[jvb5577]

What manufacture would you recommend for the bearings?

[datzenmike]

Good to know.  I am pretty sure I need the early ones from the KA24e?

I have the block bare and was looking at the crankshaft bearings.  One is worn down the the brass looking finish.  Should these be replaced? 

.

Abso freeking lutely!!!

.

There are three different sytle KA24 pistons that I can remember; early pistons, late pistons and 16 valve pistons. The dish is different on all of them.

..

 

The first few months of the S13 there were 9 to one compression (slightly domed) KA24E pistons 12010-40F10.

 

From November '88 on the S13 pistons were 2.8cc dish 8.6 compression pistons 12010-30R12.

 

The truck KA24E pistons were similar to the 12010-30R12s above, but not cut for C clips to retain the floating pins. They were the same, but different, and with a different number.

 

The S14 KA24DE has a vastly smaller combustion chamber and so has a much larger piston dish. Probably around 11cc or so. 12010-53F00

 

The truck KA24DE pistons were similar to the 12010-53F00s above, but not cut for C clips to retain the floating pins. They were the same, but different, and with a different number.

[jvb5577]

Mike for the LZ build based on the Jason Grey information I would want the KA24E truck pistons with the 2.8cc dish?  I won't mind running higher octane fuel with the higher compression. 

[GreaseMonky]

What manufacture would you recommend for the bearings?

 

I was told Clevite brand bearings, that say NDC on them, i have part # if you want for atleast standard size