it has probably been asked before but.can anyone tell me the best way to get good horse power out of an a 12 engine.the only thing is it has to retain the same carby.do they have a flat top piston avalible and an oval port head.it has to be an a12 otherwise i would have gone for an a14 or 15.can i get same pointers.are there any sites i can read up on or tech sections. thanks you

You suffering form P plater? The thing is that the standard carbies are really only an economy carbie, you can't get more out of them unless you have all the gear the Japs are using in their historic class racing.

But for fun that doesn't look illegal I'd go a weber 32\36 carby conversion, I mean weber make all this stuff for "problemmatic" carbies. I reakon that standard carby is "cough" "problematic"

Add a slightly larger exhaust all the way through and it'll be fun

just get a gx setup

Did you see how much Chris's went for?
Faaark me

and his a15 motor

I know he was offering it here for $350 or
something, that is mad! I should sell my a12t
getup once it's all shiney!

There are several things you can do: First off you can rejet the standard carb. (Weber 32/36 would be better of course) As mentioned you can go to a bigger exhaust. The flat top pistons will help regardless of any other mods. On the oval port head if you have the carb that came with it use that. You can also gasket match the manifold/head. Electronic ignition from a 120Y.Go to a 14lb flywheel. Keep it in proper tune etc. I would guess you that you could get the A12 up to the 75-78HP range. You might be able to ditch some weight out of the car as well.

Tom

ive heard a fair bit bout flat top pistons.
how much are they worth and are they easy to come across

turbo injection and electronic ignition...boom thats 100 horses right there... or 100 shot of nos. lol

A10 Pistons are flatop as far as I know.