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Thats awsome that GM is putting this engine together. I noticed that the intercooler is before the blower :confused: . I'm sure it works to cool the air some, but I can't see it being as eficient as after the blower. After all, it's the blower that heats the air up.

But it does make for a nice small tight package!

If that engine doesn't do it for you, Raylar has offered this NA 550 hp small block at a reasonable price. Reasonable concidering the R&D that has gone into the engine.

I asume this engine offered by GM will soon have a Merc version??
 

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Canada Jeff said:
Look at the picture again, it's on top before the supercharger.
The air enters the supercharger then is directed UP and around the supercharger down to the cyl. heads. Kind of like a ram horn, up over down.

If you look at it in a traditional sense of the air always being directed downward you would be correct, but they changed things a bit on this. It's an air to water intercooler too.


http://www.blogsmithmedia.com/www.autoblog.com/media/2008/01/ls9-cutaway-06.jpg

This may help.
 

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BIG MACZ said:
The air enters the supercharger then is directed UP and around the supercharger down to the cyl. heads. Kind of like a ram horn, up over down.

If you look at it in a traditional sense of the air always being directed downward you would be correct, but they changed things a bit on this. It's an air to water intercooler too.


http://www.blogsmithmedia.com/www.autoblog.com/media/2008/01/ls9-cutaway-06.jpg

This may help.
Well holly crap ! Didn't see that. Cool.
 

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201liberator said:
9.1:1 pistons. Compression seems a bit high for a roots blower.
There are some other weak points: Cast hypereutectic pistons instead of forged ones and forged powder metal connecting rods.
The 4 lobe rotor they us is VERY efficient, lowers intake temperatures significantly compared to the old 3 lobe design. The cooling system on them is also very condusive to forced induction as the heads are very well cooled and dissapate heat quickly. As for the pistons and rods I would not be concerned, I know many people running LS based engines in cars up to 700 HP with stock pistons and rods, they are pretty strong. The week points in the LS engines have always been the rod bolts. The stock rotating assembly will handle 550 HP without breathing heavy.
 

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That is just the tip of the iceburg for the LS based marine engine. I bet there will be 1000 HP small blocks in our future with the LSX platform and they will be easier on parts than a BBC and pretty driver friendly. Maybe not from GM or Merc, but the aftermarket will eventually jump on these. The LS based motor is the best thing to come along since the roots blower! :D
 

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WETTE VETTE said:
That is just the tip of the iceburg for the LS based marine engine. I bet there will be 1000 HP small blocks in our future with the LSX platform and they will be easier on parts than a BBC and pretty driver friendly. Maybe not from GM or Merc, but the aftermarket will eventually jump on these. The LS based motor is the best thing to come along since the roots blower! :D
Agree 100%, cost me a small fortune to convert my SBC 427 over to 18 degree heads, the LS engines are 14 degrees stock and there are bolt on heads out there that flow near 400 CFM. This engine is the future of boating.
 
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