There isn't alot of difference between the two styles of A12 manifolds both plenums and runners are about the same "measurement" and volume I have the other style on the car your talking about "D",but the casting is a lot heavier .
But the new manifold is alot larger and with the ports now being matched to eachother. The bigger difference is the larger volume i have :)I need to try to increase Hp but drop boost down.
Supafatto...sounds good im worried about the engine at the minute brakes will be next
cheers anthony

Yeah but with all that power you'll need to stop lol :)happy to come chat whenever only in langwarrin :)

Today i secured another head "but" im going to finish this one off and test it on the car just to prove a point and the oval head will go on the next engine I have reshaped the combustion chamber and Unshrouded the valves,I still need to finish areas off
cheers anthony

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There is a fella with petrol efi round port turbo A series getting 100kws atw, he didnt get any work done to the head so will be interesting how this round port setup goes. Are you getting 3 valve cuts or just leaving them stock? With bigger inlet and exhaust valves I do wonder if the oval port head can top this one on mid range.

Would this is Plasma ignition setup is worth while investment along with your setup?
http://www.youtube.com/watch?v=pI5_XBKg5BA
http://www.youtube.com/watch?v=7tt2Ho ... B4epg&feature=c4-overview
Heres is a fella with cadet e85 and plasma ignition setup.
http://www.youtube.com/watch?v=VwGs2-EKKNA

Not sure dave but im running the biggest coil recommended and still there is a chance of melting the rotor button or dizzy cap if i go any bigger.Its showing no signs of not being able to ignite the e85 on current boost levels and i very much doubt i will be increasing boost if anything i will come down...

Im still not able to reach my rev limit and with the motor running a basic tune im still running out of fuel with the bosch pump ,reg upgrades it was a little bit of a set back,but i think i have found where the issue is not sure how many more times the bottom end will handle a lean moment under load and boost time will tell.

i found the restriction and it cant be altered in any way cant push past 6500 leans out,so im happy with what has been done with this setup.
Tme to MOVE ON!
The new head is nearly finished and will be this week,should have the new setup bolted up over the weekend
quick pic of the new chambers after being roughed out,as you can see if you compare the new and old pictures quite a bit has been changed with the reshaping and unshrouding of the valves.
cheers anthony

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I have now finished the head,I have done some more work to it in a few areas,installed the valves and springs.
So its onto the gaskets,inlet,holley

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picked up my headbolts,new exhaust manifold flange and steam bends starting to get more gear together ,manifold has caused issues with the steel flange so i need to re work it in the mill,
Cheers anthony

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nice work. im enjoying the updates, and looking forward to seeing more progress