Some progress, Now have 1 1/2 set of charade pistons but I'm now looking toward the L20A piston due to the flat top. Sticking with the A15 crank due to the fact I want to play now.

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that is an a13 (didnt come to aus)

Little progress yet, still finding the parts I need. Removed the head from the A15 to find it was much of alikeness to my A12 head.



A15 right, A12 Left

Intake on both is 36mm and extaust is 28mm.
Will now most likely stick with the A15 head due to the oval ports.

Sorry to disappoint D. It's quite a biggy for me as it's my first engine build. It's a lttle different to upgrading an ECU and winding up the boost.
Something more high tech may come along a little later on Morgan, but for the time being I will have some fun with this build.
Was thinking of using an early v2 Link, on TM they sell for a few hundred. Will just run some 40's in this build for ease of tuning.
Got a A12 'Peanut head' ported too, so I will use this now instead of the A14GX head. Anyone have a spare charcade turbo piston? Need to complete my set.
Now was it bore the block out 1mm or oversized rings when inserting the charade pistons?

Quote:The A12A is simply an A12 with a 75mm bore for 1237cc. Same short deck block, same 70mm stroke, same rod length, but with 19mm wrist pin hole.

If it is bored out to 76mm [second oversize] it becomes a replica of the A13 engine used in some B310 models. [1270cc]

B210 sleeper pm me and I could encourage you a little further
The 88mm crank, wet sleeve conversion, longer rods and spacer plate are no small modifications. They will however make for a great boost demon at 1597cc without losing the 76mm stock bores. It will also be a nice NA race engine with 77mm bores and 85.5 stroke using offset grinding 1593cc it would be very reliable.

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Thank you for explaining why that was done!

I saw it and i was like ok, you could, but to what end...

now i'm interested...


carry on!

no it has a smaller stroke

Isnt that juts an A12A ?

or forget the a15 all together and go a14 with a12 crank so you get a smaller stroke and bigger bore