441 ls3
Advanced
Joined: Jan 2008
Posts: 85
Likes: 3
Below is a copy and paste from HPR
The HPR 442 is one of our own designs and features some exclusive components only found here. Erik designed this package to extract the most displacement from a stock LS3 engine block without having to go through the expensive of sleeving the block. The 442 features a 4.070" bore and a huge 4.250" stroke forged crankshaft.
https://horsepower-research.com/coll...uminum-442-ls3
The HPR 442 is one of our own designs and features some exclusive components only found here. Erik designed this package to extract the most displacement from a stock LS3 engine block without having to go through the expensive of sleeving the block. The 442 features a 4.070" bore and a huge 4.250" stroke forged crankshaft.
https://horsepower-research.com/coll...uminum-442-ls3
Pro
Joined: Oct 2014
Posts: 616
Likes: 193
From: Gilbert AZ
I've seen a stock LS3 bottom end handle 1100 HP dyno runs, but in my opinion, that isn't a good idea.
But for 650-700 HP, the stock LS3 bottom end is plenty strong. The weakest link in a NA "bolt-on power" LS motor are the hypereutectic pistons. They won't tolerate much detonation so make sure your combination is dialled in.
