Hi guys and girls
Just a bit of a build thread on what I may be doing in the next two months

Car: 1981 4 door datsun sunny a12 auto
Genuine 108,***ks on car and motor

Recently head gasket popped & then i snapped a head bolt in the block

So head is at the shop awaiting to be fixed when I sort out what it needs (m30)
Bottom end will be pulled out this weekend

New stuff I have for the a12

4into1 race tech extractors 2inch outlet (will be looking into an exhaust)
40 dcom single side draft weber with 28mm chokes (also came with 32mm chokes) redline manifold with soft mount kit
& high flow cotton air filter (I'm a bit worried about all the pollution gear tapping into manifold)
And unsure on what needs to be on it and what can be plugged?
Carby comes jetted to spec's of a stock Dino tuned datsun 120y running the same carby set up on an a12 so i hope it will be in the ball park

Other things I'm looking at
Cam reground found this in wiki
Camteckcams rough idle, strong mid range and top end recommended for modified engines.
Min 9.5:1 comp ratio RPM range 3200-7200 (how modified are we looking at?)
Auto gear box?? Hi stall? Can it be done 1500rpm or lower stally ?

I don't really wanna go down the sr fj rotary road for now just wanna put some life into that a12
For abit of fun and bonding time with my datsun 😜 haha

Any help/opinions will be awesome first time owning a datsun so be nice 😖

Once the A12 is rebuilt it should have no problems doing 100kph up the hills. In stock trim.

The factory torque convertor has a higher stall speed than 1500 rpm, so if you plan on revving the engine higher than stock, a high-stall speed convertor would be useful for quick starts. It won't help top speed.

Are parts interchangeable with the 3N7 AND THE L3N7 ??

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3N71B is the common auto
L3N71B - light duty - might swap?
L4N71B e.g. Commodore VL, Nissan Maxima, Mazda RX7, etc. As I recall, the convertor will not swap with the 3N71B because of the direct drive mechanism in top gear and physical shape of the convertor.

Get a Datsun 1000 convertor, it will be higher stall
* 3N71 - early Datsun 1000
* 3N71A - late Datsun 1000
* 3N71B - Datsun 1200
* LN471B: Light duty - Nissan S12 early
* EN471B: Medium duty - S12 late

May have to look into it DD depends on the cam really,
As for the hi stall found this good little read

http://www.badasscars.com/index.cfm/p ... t/product_id=78/prd78.htm

Hear are just some photo's of the car

One of the photo's was stuffing around with an air dam
Cars is still at stock height, rear is lowered with king spings
And haven't put fronts in yet

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Well scrap all that engine reconditioners have now hit me up for a 3.5k rebuild,
And I don't fancy spending that much with no head work done,
3.5k on just a 40thou rebuild, cam, pistons, rods, crank balanced the usual stuff
Is this right? Would hate to see the price with head work if I got the h89 oval port head :/

Well car is now out of rego and racking my brain on what to do with it
To get the motor back out of the shop is $200 and it's all in bits apart from the m30 head
Trying to chase a running worked a14 or a15 even a good worked a12

Cheers shaun

Yes that is the price of the most expensive place in town.

Give bige an inbox on here he can help u out with the direction u want to head.

It's the only place in town DD lol
72 Ill message bige now and seen what he can do for me cheers

As for the car it now has rego ;)
And some fat ssr meshies 15x7.5 +1 rear 15x7 +3 front
Fits nice and flush with low king springs good dish over all pretty happy with them

Hello

Ok big change of plans I recently have brought a complete crashed
79 b310 sedan
With a15 and 4 speed gbox running and rego'd
Very rusty car tho running gear is fine

So now I will be converting my 81 mod b310 auto to a manual
And dropping in the a15 and 4speed

Just a few things I'm abit worried abit

Gbox is fine but gear stick is very sloppy (ezy fix)???

When buying the car the guy told me the a15 uses oil and has to be
Topped up every 3 months, I can see that the rocket cover is leaking oil

Also the a15 runs fine has a 32/36 down draft weber
Tho when revving the motor out (foot flat up hill / or revving out a gear)
It blows a heap of black smoke, nothing when idling?
The smoke only appears when the car is under load

Is this running rich?
Maybe the weber is not tuned / jetted right
Any ideas?