Hi Mates !

I want to upgrade a Fiat 600D engine to a stronger one.

Which engines can be fit into the Fiat 600D and which one is the best ?
I want to keep the engine ccm around 1000cc and want to reach ~150bhp with turbo or nitrous.

Fiat 850 engines fit, watercooled though

Bug engines also fit, there was a drag 600 at Brooklands Auto Italia a few years back. 180BHP without nitrous.

Bug probably your best bet, since, they're alot easier to get hold of parts. Since you want to turbocharge/nitrous it....You'll need readily available parts lol