just out of curiosity, are the lnf and lsj rods the same? and do the k1 technology rods for the lsj fit on the lnf? i know zzp sells lnf k1 rods but on k1's website i cannot find a part number for the lnf rods. so brings me to the question if they are the same? thanks guys

 

I believe there is like a .005" difference in length...

 

They work fine I suppose. Ask cmiller, he used em and nothing seems to be wrong with his car.

 

Yea I called k1. They use the same rods for both I think. I would call them or pm ZZP.

 

We can get K1 for a good price, just send us the part number you wish to get.

 

ok so the k1 will work in both applications? mainly the lnf is what im looking at.

 

cmiller your using the k1's in your car right now correct?

 

Factory LNF rods have a tapered small end and the pistons are tapered to match. The aftermarket rods and pistons currently available do not have this taper. You wouldn't be able to run a stock LNF piston on a K1 rod or a Wiseco LNF piston with a stock LNF rod. However, you can run a Wiseco LNF piston with a stock LSJ rod.

Considering the price we have on our 4340 connecting rods, there isn't much reason to run the K1s. We have tested our rods well beyond where most people would ever push them.

 

ok thats perfect info right there! so the k1 or 4340 rods would work just fine with weisco lnf pistons then if im correct? should the stock sleeves hold up ok of course after being machined. i dont wanna bore farther just machine them for the new pistons.

 

You shouldn't have to bore the motor. Maybe a quick hone, but that is not always needed, either. It depends on the mileage/condition of the motor.

 

well roughly 32k miles but has been treated like gold lol guess ill have to look at it as well

 

Do you guys also have any special for the Carrillo for the LNF?

 

Matt, would it be safe if for the LNF I buy the Wiseco 88mm? If not, would it make any difference if I get the Darton sleeves? Are the Dartons strong enough to be bored?
Thank you
Christian

 

good question and i assume you dont have to change to an aftermarket sleeve to run alot of boost and power?

 

Had 38k when I did my build used a honing tool a couple passes in each cylinder and it was good. I have stock sized wiseco pistons and carrillo h-beam rods now with about 10k on the built motor everything is good

 

I think the 88mm was made for the 2.4 block

 

I am running the 88m Wisecos in 88mm bore. No issues so far.

I imagine you can order Dartons for the 88mm bore. However, you seem to be heading down a road that will render your car inoperable for months at a time ending in the decision to cut your losses and move on. The odds will be stacked against you significantly. If you are up for the challenge, go for it. If not, drop your car off at ZZP. Sorry if this comes off rude or arrogant, but it needs to be said. We have watched way too many people mod in that style only to be disappointed in the end. At ZZP, we develop solutions to the common mod mistakes, and we put together complete packages that work well together. We have had people drop off their LNF Cobalts and drive away a few days later with 450-500whp, or more.

 

How about the Gen 2 2.4 block. I have a perfect 08 block which I was going to build into a 2.1. Anything I should know before I Commit to this ?

 

Sorry Matt, but because of my english, I'm hving hard time understanding what you mean. I only understood that you are running 88mm wiseco on your LNF with no issues and that I can order the Dartons 88mm. I'm not able to understand why my car would be inoperable for a few months. Could you explain that please? Sorry, but english is not my first language.
Thank you
Christian

 

More often than not, when modders decide to take that jump into more radical modifications like having their motor sleeved, it takes several months to get the car running and it rarely goes smoothly.

 

So since you've done it already, would it be easier for me to let you guys to it at your location?

 

We don't sleeve the block. We install a girdle and retain stock sleeves. We can set up a motor ahead of time to have it ready if you schedule to have your car dropped off. If you are looking to make about 500whp, you can get by with rods and pistons in the stock block.

 

Honestly my goal would be to have about 600whp. I have another 2009 SS/TC which I intend to keep with bolts on and a tune for daily driving, that's why I'm trying to get the most power possible from this other SS

 

Then your best bet would be to drop it off with us. The question is- What are you going to do with 600whp? I never street drove my car at 600+ whp. It was only at that level for dyno testing. This was less than 550:

ZZP EFR Cobalt 60-125 - YouTube

 

Damn! I would be very happy with that kind of acceleration. What kind of set up you have on that engine as far as internals? Do you also have the head/cam combo?
Basically, this is my plan for the car: First of all, I wish I knew about zzp before I bought the turbo kit (sigh) because this AutoWerks kit is great but the turbo spools at too high rpms for my taste. I'm planning to get the head/cam combo with the supertech 78# valve springs from zzp and the Supertech .5mm oversized inconel valves (TTR sells them), Carrillo H-Beam rods and Wiseco pistons (don't know yet if 86mm or 88mm), and Darton sleeves (unless zzp tells me they are not needed). I will also need (as Nick @ BYT said) a Meth kit. My goal is to be in the 550whp/600whp range with a spool at between 3k and 3500 rpm at the most.