You probably should consider pushrod 3 valve head like one of the aftermarket chevy heads and crossflow keeping all the pushrod gear but using roller cam

I think you meant Niel not Nigel ;)

...We're still waiting to hear back from that Finnish Man about his venture into building an AY12 style head. The numbers getting thrown around back then were something like 1200-1500 for the basic head that we'd have to get the engine builder to figure out the rocker geometry and stuff.

Nothing wrong with pushrods and 4 valves per cylinder if you can work out how to do it

http://www.araoengineering.com/

http://www.youtube.com/watch?v=vRKTRLD2h8k

What happened with the AY12? Has anybody heard from the Finnish man with any updates recently? He hasn't been online since the end of 2008. I think the price you mentioned above is very reasonable for what you are getting in return.

Are there many datsun events in Perth?

Nope, I haven't heard a peep, hasn't bothered me greatly since I'm not playing with that sort of disposable income at the moment.

we have a few gatherings ,toodjay is the main one ,its a cruise to toodjay when the targa rally is on ,we ride postie bikes around too and talk #OOPS# about datsuns hahah

and cover people that sleep in with water (ass holes you know who you are!)

and no i spelt it right ,nigel*

Advantage of 4 valves over 2 is around 30% more valve area

The complexity & cost required to gain 30% more flow can be surpassed and be cheaper with a good cast turbo manifold, good inlet & correct fueling on an 2 valver A series.

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If you do a search you should turn up discussions on GA16 head conversions for the A series. Bore spacing is the same and apparently only one head bolt needs to be moved 1.5mm. It would probably be the way to go and I thought about it but reality is I don't have the time or money to spend on it. Cool idea though, I hope you get there!

D, I have been down the turbo A series route already actually. It will definatley be N/A.

Have done quite a bit of reading on here on DOHC conversions etc. Should have a GA16 head by the end of the week.

Here was my turbo A series I built up-the car and motor has since been turned into a racecar!

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