So I will be documenting the Abarth 124 built engine/big turbo build in this forum. This turbo is a Garrett G25-550.
It is rated as a 300-550 hp turbo by Garrett. The exhaust housing is the small 0.49 A/R unit so it should have a very reasonable spool time. At the very least, it will spool faster than the TD05H 16G on my old 500T (TD05H was full boost around 3500-4000 rpm depending on the tune).
The block I had assembled a while back. It is CP Pistons, Carrillo Rods, deleted oil squirters, APR head studs and the head is ported a polished cylinder head, stiffer springs, radius polished valves and a modified multiair brick.
This build will easily hit 300 so the real goal is 400+
This will be attempted on the stock cam initially (want to know the limit of the stock camshaft) and then we will move to replacing the cam. Aside from the cam, this build is only going to take a couple days so I will report back frequently. The full story will be on my YouTube channel and I'm sure John from Tork Motorsports will be dropping some good info over the next few days on social media.