New Zealand Datsun Club

A15's can be made to rev hard, but I agree that A14's seem to rev easier.
The thing which the A14's have over the A15's is the rod to stroke ratio. Since the A14's and A 15's utilise the same conrod, but the A15 has a longer stroke. The A14 has a shorter "dwell" at tdc/bdc. Longer rods make more torque. (Although longer strokes make the best torque as a rule of thumb)
Since the dwell is shorter, the "intake event" has a longer duration (in degrees of crank rotation) meaning more charge finds its way into the cylinder.
Obviously the A series aren't torque monsters in N/A configuration. So they rely on their ability to rev hard to complete the package.
I have a soft spot for the A14 too. I revved an old one of mine to over 9k. (Thanks to a dicky rev counter)

Cheers guys, so much great info. Allthought this now leaves me with hell of a difficult decision to make. Head scratch times a milion.

You could just buy my A15. It puts most A series motors to the sword.

Whats it had done? What condition an how much? Very important questions.

Ported head,
5mm oversized inlet valves,
Big cam,
Headers,
ARP rod bolts,
Shot peened rods,
HPC coated pistons,
and it's running forced induction via a supercharger.
If you're serious, come round some time and take a look.
I'm not looking to give it away, but it's only worth a tiny fraction of what I've spent building it.

awsome, can u message me a price and if its affordable il arrange time to view.

if he offers to take you for a ride, take some spare undies

Bart.....WTF.....you can't sell that engine!

I want to build a faster datsun. Bigger displacement, and a better supercharger.

The old saying comes to mind "there ain't no replacement for displacement!" sorry spam post.