Recently I took out the 305 that was in my 86 Iroc and picked up a used 350 instead. Well it turns out that the block on it is cracked so that gone too. I'm tired of trying to do a budget build, everything seems to go wrong! So I've decided to go big!!! How difficult would it be to plug in GM perf's new LSX 427? Also should I go with the carb version or EFI? Just to be clear car is not a daily driver it's gonna be a weekend street racer.

 

That motor costs over $13k!!! Do You really have that kind of cash to blow for just a motor alone. Your gonna need to spend alot of money elsewhere too.

 

I agree. You will probably have 20K or more in the project. There are numerous things to consider from the radiator to the transmission to the rear end. It sure would be a killer set up when done.

 

got anything left laying around you wouldnt mind givin away?

 

Money is not really an issue, I spent well over 6,000 last year for an orignial x ram setup for my 69 z. I tried doing the budget thing because the wife was nagging, but I make the money so she will just have to deal! Yes I am aware more than just motor will need attention, but this is the only thing my son and I have in common so it's worth every penny I spend, so we can spend time together. Anyway should I go carb or efi?

 

The only spare parts I have right now is a box of old 60's parts from some camaros and chevelles.

 

I made the mistake of not going carb on my crate install last year. I'd go carb for sure.

A nice powerful engine with a nice lope to it would be the GMPP crate 454 H.O. It's rated at 425 HP @ 5,250rpm and 500 lb/ft @ 3,250rpm with only a 8.75:1 compression ratio. And only costs $5300. I think you just need in addition to this a distributor and carburetor. http://store.summitracing.com/partde...4&autoview=sku

Now if you want to stick a new carbureted 440HP LS2 364 cid Summit just got a few of these with an LS1 4-barrel intake for $5,300 also
part # NAL-19172842

Keep us posted. I just wanted to throw these two out there. And I'm glad to see others spending money on their 3rd gens

 

Oh my gosh,
If you are going to spend the money on an LSX 427, you should most definitely go EFI.
Otherwise, just save your money and simply put in a hairy cammed smallblock. The LSX427 is a great engine and it's the fact that it can make 505 HP all day, every which way that makes it a super engine, and it's the closed-loop, sequential fuel injection that really caps it off, especially in the mid-range where these engines make terrific power.

You'd look silly if you bought a $13,000 engine and showed up with a carb on it.

Now, that said, if you get an LSX engine, you will need to address the brakes and suspension before you even turn the key. Convert the car over to Z06 brakes and rotors in the front, put in either some Wilwood, PBR, or Baer brakes in the rear, and hang them on a STRANGE 12-bolt axle. (NOT Moser, which I happen to have.) Put in the transmission of your choice, be it T56 ot 4L60E, tie the frames together with weld-in subframe connectors, then put in some good Koni shocks, tubular lower control arms, and panhard rod. Do not forget to completely rebuild your front suspension: You might even consider getting a tubular K-member as there are now companies making a third-gen specific K-member for LSx retrofit projects.

As for EFI, you can make the GM fuel injection system work with aftermarket tuner software. In fact, I think GM also offers a standalone ECM for crate engine projects with a preprogrammed tune just for that specific engine.

 

Yeah I think EFI is how I was gonna go. The car has been srtipped of everything. The whole thing is gonna be strengthened and brought up to handle and ride as well as that lsx should run.

 

Both versions of the 572 crate motor are around 13K or more and have 620 or 720HP and both harve carbs,so hows that "silly"?

I would def. stay fuel injected. With gas prices just keep going up atleast that will help some.

Sounds like a kickass project!

 

He meant to say that the "high tech" factor REALLY flies out of the the window when you install the latest in engine technology and top it off with, what equates to, a straw and bucket of fuel(carburetor).

It should be fairly easy if GM can supply the engine, harness, calibrated computer, etc.

Shouldn't be hard to rack up 30-40 grand in doing a complete ground up build with a great engine combo like this backed by a solid drivetrain, nice suspension, body work, rolling stock, and interior work. Post pics!

And when you get bored with the power, installing a good cam could make another 50-70hp. A 100shot of nitrous would be simple on top of that also. After that, the pistons and rods are an issue.

 

I will deffinatly keep you updated and post some pics, this project will probably drag though because of my other one going on right now, it's a 69z, original DZ 302 w/ x-ram intake and RS options. That's a true money pit!!!