Quote (ride686 @ Dec 15 2012 03:25am)
It doesn't take much to put a 4.6 s197 to shame lol, Regardless, the FRS is built around an essentially powerless engine, putting a v8 model into production would take alot more than just cramming in a new motor.
Miatas don't take much at all and respond great to the change. I don't know what a boxer weighs but the i4 in miatas isn't much lighter than an ls1. The entire swap adds 200 lbs and that is spread between the rear end and tranny too so it's still almost evenly balanced.
The 4.6 in the 2005+ mustangs can put out ~500 hp on stock internals and the 5.0 that epic has isn't too far from that stock.