427 LSx or LS7?

[TravisB]

Originally Posted by victionone

I don't plan to make 1000+ hp and the 454 LSX's aren't making any more power than a 427 LS7.

that depends on who builds the 454 LSx....

[68protouring454]

Originally Posted by victionone

I had to make the same decision and went with a LS7. The GM crate LS7 was a few thousand dollars cheaper btw. The LSX has a few extra cubes and is bulletproof. I don't plan to make 1000+ hp and the 454 LSX's aren't making any more power than a 427 LS7. The LS7 has a lighter rotating assembly, aluminum block, dry sump, and was cheaper.

are you serious? not making any more power??? on the edge of street driving, 11-1 lsx with a serious cam in it will see 700 hp easily n/a for 1/2 the price of a built ls7, and the ability to go bigger if something bad happens

[trapin]

My official "canned response" to this type of thread is; If money is not an option, go with what your heart tells you. If money IS an option, forego the "wants" in favor of the "needs".

To me I've always viewed the LSX block as something for the drag racing community. 2500 horse power? That's drag racing country. If you plan to have your face in the sky for the first 60 feet, then do the LSX engine. For a Pro-Touring car, weight is the big consideration, and for that I would do the LS7. Short on money? Then a warmed over LS3.

[rocketman]

There isn't that much wieght differnce in the two blocks, maybe 50 pounds

[victionone]

Originally Posted by 68protouring454

are you serious? not making any more power??? on the edge of street driving, 11-1 lsx with a serious cam in it will see 700 hp easily n/a for 1/2 the price of a built ls7, and the ability to go bigger if something bad happens

I apoligize. I meant to say not much more power than a LS7. The two 454 LSX dynos I have seen both dynoed under 600 rwhp. SW made 571rwhp on his LS7 with a cam. I know there are a lot of variables, and there is no doulbt a bigger cubed LSX will make more power. No arguement here.

I got a few estimates for a LSX build and they all ranged from $14-15k depending on components. This price includes injectors, rails, tb, coils, sensors, etc. Basically everything a crate GM LS7 would include. A GM crate LS7 can be had for under 12k and also includes a flywheel and clutch btw. A build with a LS7 block would cost $700 more since a LS7 block is about $700 more than a LSX block. I don't see how it can double the total cost.

[jeff s]

Originally Posted by rocketman

There isn't that much wieght differnce in the two blocks, maybe 50 pounds

It's actually well over 100 lbs heavier.

[rocketman]

I didn't have a Ls1 block to weigh it doesn't seem that much heavier, but I found where it's a 105 pds heavier

[James OLC]

for what it's worth:

http://www.ls1tech.com/forums/showth...37#post8356237

[tyoneal]

Originally Posted by reboot04

for what it's worth:

http://www.ls1tech.com/forums/showth...37#post8356237

--------------------------------------------------
I guess for now, that takes care of that.

I hope they get things settled, for everyone wanting one.

TY

[trapin]

I have a friend that builds engines, Chris Uratchko is his name. He owns Uratchko Racing Engines here in Michigan. We've talked about that block in the past and I remember him telling me his disdain for it. That was the first I heard that they were made in China. Interesting that this now comes out. I'll have to show him this thread.