New plan:
This cost is about $1300. I spent about $800 on brass fittings and 200 on the plate to plate. Fortunately I can return the other stuff. It’s not much difference to do it in a better way. Hope this helps others dealing with this.
I’ve found that crusader (also pleasure craft marine I believe they are under the same parent company) use a LS based engine in some instances (6.0). I know Ilmor and I believe Indmar utilize the LS. However, I’m excluding them for this conversation. My preliminary research shows crusader is the least expensive and most readily available.
I prefer Crusader die to the full closed cooling design. The Hardin Marine setup only does half closed (block only not exhaust) and costs $1600.
https://www.hardin-marine.com/p-7409...per-brass.aspx
Here is a link to the Crusader parts manual. Throughout the drawings reflect LS architecture.
Please see:
pic on p1
Pic on p8 of water pump diagram
Pgs 32-41 diagram the closed cooling and detail the setup for the 6.0
https://www.crusaderengines.com/wp-c...03/L510018.pdf
Here’s another view of the cooling diagram
https://macombmarineparts.com/pages/...tem-components
Parts required:
Heat exchanger- RA0147048a
Marine parts.us:
Heat exchanger Thermostat housing and splitter - r025038- $65.35
Perf protech:
Heat Exchanger Bracket- r090258- $137.15
Degas bottle- r146001-$75.38
Degas cap- r034045- $23.36
Degas bottle bracket?
Various suppliers:
Water pump inlet and threaded port- R025036 $44.27 p8 of crusader diagram
Searching for:
Water pump tee- R025035a
Misc hoses and clamps.
I’m still searching for the water pump Tee r025035a. I already made my own out of brass fittings and reducers. I used a 1.25” brass tee with 1.25” hose barb fitting inlet and reducers to 1” hose barb outlets. I suspect the crusader part r025035a would be much less expensive.
Per our first call, I learned that 1hp =2,500 BTU’s. However that number does not include the cooling requirements of a full closed system. Maybe you can back into it from the information provided.
Closing notes in exhaust manifolds. I bought these from Hardin Marine
https://www.hardin-marine.com/p-1045...-53-60-62.aspx
I wanted to keep iron out of the boat in my salt water environment. However, I did not consider that I might need exhaust riser spacers. I am now faced with definitely needing spacers and will probably have to fabricate them myself. I would tell others to buy the crusader or pcm exhaust elbows and risers if they might need spacers. Perforate h has a good article about this.