Here's where I stand on the lsx platform. Right now I don't think there is a better bang for the buck engine when you're talking about your average 4-500hp small block. .
This is where the logic coming from the LS crowd eludes me. First of all 4-500 hp from a typical sbf or LS motor is not that much. I'm building a 351 right now that will make around 500 hp and is a mild motor. 10.6:1 compression, flat tappet cam, .600/.610 lift with 242/252 duration, 114 LSA. Valve springs are very mild around 325 pounds of open pressure. This is going to be driven almost every day. When I get done, I might have $2500 in the entire build from the ground up. A brand new fresh built motor with zero miles. Not a used pull out. By the time you buy a used motor, add the cam kit, and other stuff, you'll have way more than $2500 and still a used motor.
And guess what else? The engine is going to bolt right into the car! No fooling with custom mounts, drive shafts, headers, radiator hoses, nothing. So I don't see how you can say an LS motor fits better when they will not bolt directly into the car nor will anything else work.
They are plentiful/affordable, they have a huge aftermarket,.
Ummm, how you taken a gander at what's been available for an sbf for the past 40 years?
I have had both a 351w and a ls2 in my car. Both were run of the mill builds with very comparable parts.
If they had comparable parts, they should have had comparable power. If not, then the 351 had some mismatched parts, or the tune was off. It could be either if you were having problems with it running smooth.
It's easy to screw up an sbf. There's plenty of aftermarket support, and the parts are cheap, but the entire world is geared toward tuning/building chevrolet motors. Very few people I have run across really know what they are doing when it comes to choosing the right parts and tuning/building an sbf. This goes for the bbf stuff as well. There is no telling how many potentially fast combos I have seen that were being killed by a stock mass air meter, or the guy refusing to get a custom computer tune. We have one local that can't get his carbed bbf coupe into the 11s and the damn thing has aluminum heads while another guy has the same motor in the same type car and runs 10s with the stock iron heads. Less money, more power, simply because one guy knows what he is doing and the other does not.