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I'm starting a 2.4L engine build and was curious if anyone knew what is the best year and model for the Generation 2 Ecotec 2.4L block?

I have a supplier that has all of them available and my mind is set on the 2.4L, so lets keep on the topic of the blocks.

What are the differences in design and build material or process. I know some are Port Injected and some Direct Injected, but the heads are all interchangeable with little or no modification. So just the block... which one is best and why?

I'm assuming the newer LUK, but I'm often wrong so tell me what you know!


--Christian



2.4L:

LE5
LAT
LE9
LAF
LEA
LUK
 

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The Cobalts had a slightly different version of the 2.4 than we did and it was Supercharged from the factory, don't know much about Cobalts but that was the block that most of the people I know building race motors used (drifters). The worlds fastest 4 banger is a 2.4 GM racing block built by Gardella Racing, you might contact Gary Gardella he is a very nice guy. He got a bit over 1400 HP out of the Red Bull Cobalt funny car.
 

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The Cobalts had a slightly different version of the 2.4 than we did and it was Supercharged from the factory, don't know much about Cobalts but that was the block that most of the people I know building race motors used (drifters). The worlds fastest 4 banger is a 2.4 GM racing block built by Gardella Racing, you might contact Gary Gardella he is a very nice guy. He got a bit over 1400 HP out of the Red Bull Cobalt funny car.
The Supercharged Cobalt had a Gen 1 2.0L, not a 2.4.

If you are going for a street driven, non race motor, and plan to boost it, i would recommend staying with 2.0L, as it has a square bore/stroke, making it more stable at higher rpms.

If you are NA, and looking to just rebuild a block, then i would look at the build spec. You named a series of engines, but for the most part their blocks will be identical, with the real variations being in the cylinder head, and aspiration.
 
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