Re: 929 how far can it go in HP 155 ?? 160 ?? 170 ??
Custom is right, its basically money.
with a small turbo you can get 200+whp. remember to keep reliability in mind though. you don't want to run a crazy amount of boost without going and and strengthening the motors internals.
to build a high hp naturally aspirated motor its gonna cost you a lot more. the Erion FX 929s were putting out a little over 180hp but thats probably way more money than you wanna spend. but remember they could also easily rebuilt it if need be.
if you can't convince them, confuse them.