Hi there,
I have 2 LS7 engines in stock right now. I'll sell them for 12,500 each at this moment! Give me a call or send me an email.

Thanks,
Gene

 

Dave, I'm no mechanic but with close to a 15K budget (from what other stuff I've seen here you'll need) that's a lot of pazzuldabums & all you've got to show for it is a stock LS7 engine?

You could could go nuts on your LS1... bore the engine, upgrade the heads, intake, cam & crank and even supercharge on top of all that if you want, by then aren't you putting out insane horsepower that would make the poor ole LS7 go running home to mama? .... and for way less money. Heck you don't even need to supercharge to whoop the LS7 and with everything you could be replacing you have a new engine anyway for a fraction of your LS7 costs.

Obviously your a gear head and this swap seems to appeal to you. $12K for a 500 hp engine, plus a few more K's for electronics (plus all the unknown electronic gremlins) just to make it work and you haven't even begun the necessary work of beefing up your drivetrain, trans, suspension, etc. All in all, it doesn't pencil by my mind....

At the end of the day, I assume since you want to road race you'll want a package that produces mid-range power and can handle upper range rpm's for long periods. Just seems to me that's a custom order but I'm just a nobody spouting off...

 

I'm puzzled with all the get the LS2 not the LS7 recommendations. the LS7 motor is a whole 1.0 Liter bigger than the LS2; for the LS2 to get to the same HP numbers that the LS7 could easily achieve by N/A mods, it would require radical changes with radical change to drivability.

If I was going to invest in a new motor, I would make it count and go for the LS7 or another 427 motor.

 

I think you perhaps misunderstood the recommendations. The LS7 delivers 500 horse, probably 420-440 rwhp for a nifty 15K all told. That power level is paltry for the cash invested and for the fragility that cast pistons provide, not to mention hassle factor with electronics.

On the other hand taking an LS2 to that power level is a walk in the park and very driveable at half the cost.

On the machismo level, yes a 427 is nice, but you could make one yourself with less hassle and have a near bullet proof foundation for at least same dollars as a LS7.

 

...no doubt... and the L92 based motor WILL be the cost alternative outperforming the LS2 in any form (including cost/dollar, IMO). The LS2 is yesterdays news... however look how much the 246 head (orginal C5 Z06) assembled is selling for through the aftermarket CNC shops... cheap CHEAP! They are trying to get rid of these castings because the L92 and LS7 stuff coming up is, in fact, that much better...

Bill

 

oops hassle and not hastle for the English majors out there.

 

What he said.

FWIW, people saying that you can build a much better (well, more powerful) motor for half the price probably haven't ever built up a motor, except in their shopping carts before they logged off and went to bed.

Rebuilding a motor (with the good stuff) can get insanely expensive. Fast. If you are looking for stout, OEM reliability, with 450rwhp or so, get the crate engine. Anything esle, regardless of how much power it will make, is not going to give you the longevity and reliability that a stock crate motor will offer.

Call me crazy, but I'd venture to say that you couldn't build a motor within 100hp of the LS7 for the price (assuming the same headers/boltons). Oh yeah, that little thing called driveability. I enjoy cam surge all day long when I was 20. A few years later, and I don't want smelly exhausts and cam surge.

Ask me how I know all of this.
Ryan

 

well I know for damn sure you are not talking about me so I will ignore your post

 

That assumes an LS7 crate plus all of the conversion pieces and install. Keep in mind that you can order an LS7 bare block, heads, etc. Put in a _little_ larger than stock cam and a set of long tube headers and you'll be well over 420 rwhp.

 

agreed but that is not a crate motor is it

 

I haven't done any builds of note. Put a Vararam vr-b2 ram scoop on my stock c5. Going to put flowmaster mufflers on next but aside from that, keeping it pretty original. Nothing I do can't be undone (my choice). I was wondering if anyone has Googled a 572 engine.

I think what i found for 14,000 it may be pretty good but again, I don't have any experience building.
Link follows:

http://www.proformanceunlimited.com/specs/572_750.html

632 stroker chevy engine 800hp out of the box.

 

A '572' is a very big 'BIG BLOCK', and physically would not fit in a C5.
Plus they are old school carb motors...and heavy!

frank

 

Plus thread is 10 years old.