Hey all, I know i seem confused but thats because i am.... Some people tell me to put a naps-z engine into my 210 and some guy just gave me an L20B engine that missing little things like the exhaust and intake manifolds... Now Im not sure in which direction i should go.... Naps-z, Naps-z w/ L20B Head, or L20B.... I need some opinions.... not looking to put a turbo or anything... looking for an race vehicle yet street legal.... Or should i just keep the A12A thats in my car now??

well if you dont mind an engine conversion, the l20b option is cheap with good results, me and quiet a few others have done the conversion, do a search plenty of info out there. Its a tight fit though!

But if you like your car to be mostly original, I'd stick with the "A" series motor

What's the casting number on your L20b head?

808 when you say race vehicle could you clarify......local drags , autocross or just something that will scoot along your mostly 2 lane roads (IE early morning blast to the other side of the Island)

The L20 will require a differant crossmember and front suspension changes.......it's a bit involved.

If you want a zippy little car for blasting round I would recommend the following:

Keep the A12A bolt on a Weber 32/36 carb , header and 2 inch exhaust. Depending on your smog laws you can further add valves from an A14 , GX valve springs and a mild cam. This should get it to around 90 HP (your have about 70 now)
Next buy some good tires and rims 185/60 13's . Add a set of sway bars and some good shocks.
Finally are your best beaches still down dirt roads?? Reason I ask is if your headed down some of the old beach roads you don't want to lower the car. If not then also lower the car about 1-2 inches.
A 210 with 90 HP and good suspension will be great fun on your roads......if you shop carefully all this will set you back about $1000. You will have to do the work yourself but as you have probably already found out these cars are great to work on.

My .02 , Tom

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Remember that this is a Datsun 210, or B310 & these have a lot more room in there for the larger L series engine than earlier models. These cars are also heavier & benefit more form the larger engines too.

If you chose to stay with the A series, & these are certainly a good choice, then I would suggest that you come up with an A15 as the 12mm [1/2"] longer stroke will haul the heavier weight of the B310 better than the A12A engine, yet will simply bolt right in.

I have had over the years, A few nice A Series engines from A12 twin webber to A14 Turbo and Most of the L Series motors from L18/20 heavly worked to L26 Turbo. In my Opinion the A series is the (Cheaper Option). And the L series is the Power Option. I have found the A series motors are classed as Rev engines, Rev it to go and the L20's up, are torque motors. As noted it depends on the type of racing your going to do and the best set-up for it, plus how much $$$ you want to spend.

My rule with Datsuns engines is (no such thing as stock! if a part comes off i goes back on Worked)

Dodgeman how did I miss this.... "DUH" it's an A12..."A". (guess I've been playing with early A12 for too long) I agree with Dodgeman 808 go to an A14 or A15 engine........then add weber carb and headers. A15 is 82HP stock so paired with a mild cam you should easily get 95 HP.

Tom

the casting number on the l20b head is U67.... thanks for all the info...

I think 808 never specified if her car is a B210 or the 210 ( aka 310).

I agree with everyone here, the A engine would make a cool fast and swift car. The L engine is more torquey and definitely a improvement , but not needed unless you are bent on more and bigger motors.
The A engine fitted with a Weber, a cam, head work with bigger valves and some sturdy push rods will have more power than needed to have a great car.
Also think about the suspension improvements. A better and swift motor with a bad "hamock" suspension can endanger your engine investment and your safety.
You will need to make your brake system 100% responsive. You will need shocks and tronger springs and a real kicker will be the sway bars.
You will save money by improving your A engine and will have spare for the suspension.
Unless money is no issue......