I am currently building a new engine for my fez, it's a 2.0 with forged pistons 11.1 comp ratio, big spec head, piper cams, 3mm oversized valves ported flowed etc. Im after a throttle body kit to go on this engine but I'm not sure if the standard kits for the 2.0 zetec(45mm) are big enough to release the full potential of my engine, would 48's be too big ?
Someone please help as I'm not sure what size to go for.