The QR is going into a 71 Coupe with an auto transmission. I bought another coupe along with an RX7 LSD axle and a few other items to bring the car up to a more modern feel.

IT was a barn find survivor with very little rust. Right now its just sitting in storage until my Ford F100 is my daily. Few weeks away...

I am getting the QR20 for the 71 Automatic car I picked up a few weeks ago. The motor looks to be more than the car needs.

The wife hates to drive manual trans.

I imagine the chamber design wouldn't be that exotic. The Hyabusa design isn't anything spectacular, Shallow dome with two intake and two exhaust. Spark right in the very center of the cylinder.


Anyone try to adapt this cylinder head to the A12 block, or is the symmetry off?

Hey Simon any of the turbo kit stuff you want to refine with a CNC I’m open to help.

Tom same for your setup.

I like that the A12 Budget turbo makes more power than the Standard 2-ltrs.

I'm still on computer design of the A12H crossflow head, but in the mean time I am going to be beefing up my A12 to a turbo setup, and can make double of the EFI Items for this setup Tom. The new head is going to take a while longer than it would to make a really nice EFI-Turbo A-series.

That is a high strung A12!!

I remember you posting something about rotary valve systems. Would you mind posting some more links on the rotary V system in this thread D?

Push rod angle doesn't change.

Barrel throttle valves are pretty cool.

I haven't done enough exploring on those.

Did a little more work this evening.

Things still yet to model after the Cylinder Head.

-Valve Seats
-Valves
-Lifters
-Push Rods
-Rocker assembly
-Camshaft
-Crankshaft
-Connecting Rods
-Timing Gears and Belt
-Pistons

Valve seats are on order.

I’m just getting factory sizes for now, and leaving enough for a much larger version of valve later.