A good friend of ours in the Antigua we built a twin turbo LS1 for his 2004 corvette , called me last month and told me he had aquired a batboat and wanted to use his old engine we had in the shop so he proceeded to tell me he wanted it to be bad to the bone . We built this stroker combo with billet crank Carrillo rods JE pistons and ported and flowed the heads to be able to use the 1.8 ratio rockers with the big valve lift . We're awaiting a Fast EFI system to finish the tuning and I'll give you some numbers when we finish it.

here are some cylinder head pics of the ports and the components being used in the valvetrane

Since your using aluminum heads & block are you doing closed cooling?

yes it's a closed cooling system and the exhaust is custom by CMI it'll have circulating pump and raw water pump

Using a LS1 is something I've had in mind for quite some time. What's a engine like that running? I mean the cost for stock vs wild?

You can build one with some goodies like cam valves springs rockers forged pistons totaly balanced and blueprinted for around $8500 plus exhaust and cooling. And you can go crazy and spend $25,000 on big power big cubes but the factoy block will only take so much I've done some twin turbo strokers for some street guys here in town with the iron truck block and they hold up great.

now THIS is a cool as **** project, keep us informed.

Jim

what would you use for exhaust???

CMI is making some headers for it

Here is a company in New Zeland that has marine manifolds for the LS1.http://www.waspaust.co.nz/Chev6.htm