[mikedsilva]

Someone has asked me to build his 3.0 Carrera engine with a bit more oomph (chasing 230-240)

It has the stock low compression 8.5:1 pistons so these will go in the trash.

He wants to keep it at 3.0litres so a modified piston will be required; not sure if they are available off the shelf or if have to be made (still waiting on a set from CP for 3 months and counting....) In my mind, if we are using a new 95mm piston then the cylinders will likely need to be recoated, in which case, why not open them up a little or find some decent 3.2 barrels along the way?

But he also wants to keep it with the stock fuel system.

So the question is, how capable is the stock CIS?

He requires heat so is looking at SSI - they make the normal 1.5 inch primary but I'm inclined to use the 1&5/8 primary. Would the larger primary hinder torque down low?

As for Cams, maybe something from John D or W Knight but what?

I guess I'm trying to find the 'sweet spot'....