Alright I owned a 2006 Cobalt ss/sc with just an aftermarket exhaust, but sold it awhile back. Pretty fun car, definitly my favorite vehicle ive owned so far. Now I'm on the hunt for a ss/tc to build. For months now ive been researching the lnf, spending hours every night reading and slowly piecing together what works and what doesn't. I still have so much to learn obviously, which is why I'm here. Alright heres my questions point blank: 1.) I can find a lot of threads and articles about the limits of the stock lnf bottom end (with stock internals) but I can't seem to find the limit to the actual block itself. Say for example I build the stock lnf block with 800+hp rated internals and resleeved that bitch, would the actual block itself be capable of that kind of power? Just the bare block, equipped with new sleeves and high hp rated internals. Basically what I'm asking is what kind of power can the bare lnf block handle? 2.) I have the oppertunity to buy a 09 ss/tc with the Ldk block already in it for a good price. Whatever car I get im going to build with 550whp as the goal. In reality, 500+ I would be happy with, and more towards 600 would have me overwhelmingly happy, but optimally I want 550. So for building purposes would it be any more beneficial to get the car with the Ldk since its a good deal? Or get an lnf? Because the Ldk I found is roughly the same price as most of the lnf's I've found. Basically, WHATS ULTIMATELY BETTER FOR POWER: LNF OR LDK? I havnt done hardly any research on the Ldk since this car just came up for sale and wasn't expecting to be looking into a cobalt with an Ldk, hence me not doing any research on it. 3.) i havnt read hardly any high hp builds running on 93, mostly e85 or some other crazy **** that I don't know anything about. I don't have the option of running any other fuels besides 93 because I live in the middle of nowhere. So BASICALLY is it possible to build a lnf or Ldk pushing between 500-600 hp on 93 and meth inj? Thanks in advance for any answers.

 

LDK Description from ZZP
"A European high-performance version of the LNF with 9.3:1 compression. This engine is also known as A20NFT and A20NHT by GM Powertrain Europe. The LDK engine uses a Gen 3 "sand cast" block, larger oil pan, higher compression pistons, and several enhancements over the LNF. In its stock form it makes ~10 more HP than the LNF but can handle up to 400WHP. To make more than 400whp we would suggest better rods and pistons. We offer a full forged engine here. The block itself can handle a little over 500whp."

You will have to go with this for 600whp
ZZP Girdled Gen3 Block - Engine

Also, transmission becomes an issue. The stock trans doesn't hold up well at the HP you want.

 

Ok thank you. And what are your thoughts on my last question? About making ~550whp on 93? Built motor obviously. Is it possible even with a fully built motor to hit those numbers on 93? And yeah I'm planning on a built trans

 

the fuel isnt the issue, you just need a big enough turbo