A12 GX Double Valve Springs on an A14

[KiloTango1200]

Will the A12 GX double valve spring fit an A14? I want a high rev A14 and need to know how to proceed with a healthy, stock A14. Also will an A12 header fit on an A14 head? Seems to be a lot more performance parts for the A12 than for the A14. Or maybe I'm not looking in the right places.

[metalmonkey47]

It's my understanding that most A12 and A14 parts interchange (for the most part) however the A15 had a taller deck height. I could be wrong. Been a while since I've been around A series. 

[Morrisun]

Yes the springs will fit. Here is a link to a mild A14 build-

http://datsun1200.com/modules/mediawiki/index.php?title=A14_Engine#Mild_Build_Upgrade

The headers will bolt on to the heads, it's the lenght of the tubes and collector as the B210/210 headers tend to be a bit long for putting into a 1200. However they can be cut and rewelded IF there is anything left of the tubes. An A14 block has a high deck height (started with the A13 blocks)  and that may also contrubite to fitting a header. New A-series headers are available but I would caution you in purchasing one from the Oregon state area. Cylinder heads like an H89 larger oval ports, valves- 37mm intake, 30mm exhaust- getting harder find and the cost is up. Peter Zekert, http://www.peterzekert.com/for-sale has cylinder heads for sale from time to time, most have been worked to flow better on race engines. He also has race pistons- used, that may work for your engine. Texas has it's share of Datsun race cars running A series engines, you may what to contact one of them and find who builds engines for them. Flat top pistons for a A14- new about $700.00+ Isky spring that don't bind another $125.00 plus retainers and what cam? And when it's done will it be "streetable" or are you building for Auto-X or the track??

[KiloTango1200]

Yes the springs will fit. Here is a link to a mild A14 build-

http://datsun1200.com/modules/mediawiki/index.php?title=A14_Engine#Mild_Build_Upgrade

The headers will bolt on to the heads, it's the lenght of the tubes and collector as the B210/210 headers tend to be a bit long for putting into a 1200. However they can be cut and rewelded IF there is anything left of the tubes. An A14 block has a high deck height (started with the A13 blocks)  and that may also contrubite to fitting a header. New A-series headers are available but I would caution you in purchasing one from the Oregon state area. Cylinder heads like an H89 larger oval ports, valves- 37mm intake, 30mm exhaust- getting harder find and the cost is up. Peter Zekert, http://www.peterzekert.com/for-sale has cylinder heads for sale from time to time, most have been worked to flow better on race engines. He also has race pistons- used, that may work for your engine. Texas has it's share of Datsun race cars running A series engines, you may what to contact one of them and find who builds engines for them. Flat top pistons for a A14- new about $700.00+ Isky spring that don't bind another $125.00 plus retainers and what cam? And when it's done will it be "streetable" or are you building for Auto-X or the track??

The 1200 is in very good original condition so it will get a cosmetic restoration, but I would still like to run it Auto-X occasionally. Texas Motor Speedway is only 15 miles from me.

[K Appley]

A14 and A15 block's were the same with just the crank stroke and piston's changed.

 

 

Kurt.