the block differences between an A-14 engine and a A-15

[wobbedennis]

subject kind of says it all. I want to build an A-14 to the A-15 specs, but I don't know if the block will work. ideas?

[ggzilla]

A15 uses same block as A14. The early A14 block has to be modified slightly. If it has 'A14' casting mark it is an early block.

[wobbedennis]

ok, it's in a 1979 210, and it's the original engine. it has the casting mark, and what would I have to do to get this engine to the 1.5L specs, with higher compression?

[wobbedennis]

also, may I ask what would be the best build for my little engine?

[graveltrapp]

Try looking over the 1200.com site. They have tons of info on the A series engines. The wiki link is incredibly detailed.

http://datsun1200.com/modules/mediawiki/index.php?title=Datsun_1200_encyclopedia

[wobbedennis]

I couldn't find much for these engines on that site. and the builds I can find on here are of a different engine, not the factory A series. The engine in my car is the factory A-14, so that's why I want to build it. And I don't want a radical build, I just want to bump the horse power rating to about 100. 

[rusty12ver]

Don't know where you are located, but there are shops that can build you a motor, or If you plan to do It your self they can point you in the right direction. Do you know what shape the ports are on the cylinder head?

[ggzilla]

What I would do is plop a good used A15 in there. No machining, mixing or matching - it just works.

 

A15 1980-1981 has same HP as an A14. A15 1981-1982 has less HP per datsun1200.com.

[ggzilla]

Since the head is the same as an A14, peak power will be the same, but in lower RPMs there is a 7% cubic inch advantage.

 

To make a huge difference, bore it out. A 3mm overbored A14 will make more mid-rpm power than an A15. Of course you could likewise overbore an A15. Custom forged pistons are only $100 from Arias.