hey all ive looked through the tech section at the a12 gx bit and i was wondering if anything about the a12gx to the a12 wasnt listed im currently building an a15 to kind of gx spec soo just wonderin if anythin was left out?

cheers jacob

The A12 GX [B210] is alleged to have flat top pistons, but the one I dismantled didn't. They have a 'warmed over' cam profile, but it isn't what you would call HOT. They have a big port head with dual valve springs, but the valve diameters are standard A10/ 1200/ A12 sizes of 35 & 29 mm.

They use a free flowing dual outlet cast exhaust manifold & a dual Hitachi induction that uses square top carbs & some additional emissions equipment that the 1200 didn't have. These engines had an additional fitting on the water pump inlet pipe to take the coolant hose from the front of the inlet manifold. This is for the manifolds water heating system & for street duty, particularly in the cooler climates, I recommend that this feature be kept fully operational.

The distributor used a single spring for the advance weights [a stock B10 spring] & the fuel pump had a slightly stronger spring under the diaphragm for a whisker more pump pressure.

Other than that, the A12 GX engine was pretty much made up of stock A12 parts.

The B210 twin carb engine is the A12T or A14T. Is that what Dodgeman is talking about?

Quote:Sure, anything we don't know about isn't listed.

thanks guys

thanks guys