The Stock 2.0l LSJ rods and piston are good up to ???hp
The Stock 2.0l LSJ manifold is good up to ???hp
The Stock 2.0l LSJ cams are good up to ???hp
The Stock 2.0l LSJ heads are good up to ???hp
The Stock 2.0l LSJ (and anything else you can think of) are good up to ???hp

Maybe we can sticky this for a quick reference guide

They all last to the point of detonation for moving parts. Beyond that it's speculation, tuning skill and goal dependant.
You are asking for a number and in most cases other factors limit the performance and take presidance over HP.

The only one with a real answer is the rods and pistons. The rest depends on the mods. Such as the manifold, I guess lower, since there is no upper. And that part may be restrictive, but won't limit it to a number.

I'd just get some specs on the rods/pistons and crank. Should be in that build book somewhere.

Wow, I was about to ask this same quetsion, although mine would add:

The stock tranny is good up to ???HP
The stock clutch is good up to ???HP
The stock shortblock is good up to ???HP

Pistons will work up to 275 HP and maybe 300 if you are REAL careful.
Rods are good for 400 HP with forged pistons. I have yet to see a set go.
Clutch is right at 270 and even 200 if abused.
Tranny is like the clutch, it will work if you don't abuse it.
Shortblock is good for 500 HP before you have to open it up.

Pistons will work up to 275 HP and maybe 300 if you are REAL careful.
Rods are good for 400 HP with forged pistons. I have yet to see a set go.
That makes me sad how are we supposed to break the 300 barrier adding a turbo to the car would mean we would have to open it up that sux. I want a twin charger!!! :mad:

actually saying the short block is good to 500hp is conrdicting to everthing you posted prior to that. the short block includes the crank rods and pistions. acording to the GM build boo the stock short block is good to about 400hp. and the super charger will not support in stock form much above 275. then you would have to spin it above the safe limit and it would be eating more power than it produces and probly launching the internas of it somewhere bad. do a search for eaton m62 performance on the net. there is a company who did the exact specs for how much powert it takes to spin this SC at a given boost level. as for the turbo... check out han racing for the ecotec 2.2 kit for the cav. it is the same motor and the supplied exhaust manifold WILL bolt to your head. the only diffrence is the internals. then remove the supercharger and add an aftermarket intake also for the cav. again the same head. there will be some custom tubing needed and some good old fasion inginuity. or you can keep the supercharger and twin charge it?

I had enough money, I'd be driving a turbo S/C now. I'm hoping that GM pulls there heads out of there @$$ a little further, and realize that turbos are better. Way less paracidic draw = more power.

The Stock 2.0l LSJ rods are good to 400 and piston are good up to 300hp
The Stock 2.0l LSJ manifold is good up to 350hp
The Stock 2.0l LSJ cams are good up to 400hp
The Stock 2.0l LSJ heads are good up to around 400hp
Teh rod spec i got from gm, pistions,intake,cams, all come from the build book and i'm guessing on the head as it lists the stock head from 250-400hp then list a new head for 400-1400hp

All of that info is sourced from the GM Sport Compact Performance book. However I am confused on the Pistons. If you read the book it has the following to say :

The ECOTEC engine is the perfect starting point for
performance enthusiasts. Power levels of up to 400
horsepower can be achieved with the installation of
connecting rods and pistons, a new head gasket and head
bolts, adjustable cam gears and a nitrous oxide system or
a turbo kit. No modifications to the cylinder head, block,
main girdle or crankshaft are required. (

The 2.0L LSJ ECOTEC engine has forged steel rods similar
to Small Block Chevy “Pink Rod.” The forged steel rods are
made of high quality material and have a cap screw 23 mm
small end, and a full floating bronze bushing. These rods are
available through GM under part number 12755126. These
rods require GM Performance Parts piston set part number
88958634 to work with the stock 2.2L crankshaft.
Alternatively, Eagle and Manley both offer a CNC machined
H-Beam rod which is an exact replacement for the stock
2.2L rod.

The stock 2.2LECOTEC pistons have been tested to power
levels approaching 300 hp. However these pistons should
be replaced with a stock forged-type piston for applications
over the 300 hp level. JE, Wiseco and Diamond offer pistons
in various compression ratios that work for most
applications. We recommend a compression ratio of 9:1 or
less for blown gas applications, and 10-11:1 for normally
aspirated with premium fuel. GM Performance Parts offers
a stock replacement piston that is a direct drop in when used
with the LSJ connecting rod.

The factory intake manifold has been tested to the 350 hp
level.


Now does that mean our 2.0 with the updated Connecting Rods got the replacement piston already? *It appears so* If so then does that mean we are still limited to 300HP? According to the document we can go to 400HP with the adjustments on a Stock 2.2, why can't we with the 2.0 when they recommend getting the rods and piston replacement that we already have? I ask because putting that turbo and nitrous on is very appealing to me but I don't want to break anything just yet....I haven't even made my first payment yet! :D

Nevermind, you are right. I went to the end of the doc and found this in the parts list.

LSJ Connecting Rods (less than 300 hp only) 12755162 GM

Piston set for LSJ Rods (less than 300 hp only) 88958634 GM Performance
Parts

I answered my own dumb ass question ;)

the lsj have the updated rods and diffrent pistions than the 2.2. i have talked to several 2.2 cav drivers wilth dyno'd 275-330 stock bottom end motors. i would put the lsj to maybe 375 crank hp. tuning is everything. also turbo power and nitrous power is very diffrent. nitrous is an insant hit to the motor and can go bad faster than turbo power. turbo alone i would like to think you could get more power. also the head gasket and head bolts?? how much can they take? i know on my daytona shelby the head bolts and gasket would fail before the bottom end.

i know on my daytona shelby the head bolts and gasket would fail before the bottom end.
Mopar Peformance makes great cheap(ish) parts that last and last.

Back on topic, thanks for the input guys!
Still waiting on a number for the numbers on the transmission though.

Make sure you read that GM performance build book good, as very little of whats in there has to do with the LSJ. The LSJ is refered to alot, and to build up a L61 you are told to upgrade to alot of the LSJ parts. The part about what the block , head, and the crank will take apply to both pretty much. I am not worried too much about what the motor can take for mods, if you have looked through that build book it will inspirer great confidance in the strength of the ECOTEC. I would be happy to get HP up to 300 range and bump the rev limit up to 7000rpm wether it is with stage kits or aftermarket.

cobaltssliver. i e-mailed gm and they said that the lsj pistions are not of the updated desing. they are like the factory ones but have differences from the 2.2 pistions thus the different part #

My hp goal within the next 3 years is +380whp but looks like I need some nice pistons and rods to go with that setup. I just want to know what gravana's going to do with that turbo they're coming out with. If they want to make it bolt on the power levels are going to be low but if they want to offer it with power levels over 300 then it makes you wonder how much the kit is going to be ya know! I wonder if my 1 year plan of a 2.8"pully, down pipe 3" piping, cat removed, and intake is going to put me to 300 and even if it doesn't I dont want it to put me dangerously close. Pistons and rods are expensive not to mention instalation, and everything else that comes with it, over $700 easy in the 1000s :(

06redss400

Then I take we need to update the rods to Eagle/Manley, pistons to Wiseco/JE/Diamon, street performance wrist pin Manley/JE/Wiseco, Bates Engineering Valve Springs, new head-gasket/head-bolts*per GM for everytime they are removed the need to be replaced to provide proper head gasket clamp loading*and we are good to 350HP becuase the only thing stopping us from 400HP is the stock intake manifold that is tested to 350HP?

Correct me if my interpretation of the maunual is wrong. I want to have my shit together before I do all this to my ride. Also anyone know what the eact 'redline' will be if I go with the updated valve spring.

Any limits on that 5 speed tranny and fron-end components putting down the 350HP and 300+ TQ?

The other thing I've considered is buying a 'race motor' or short speak for another 2.0 or 2.2 to drop in there do all this with and see what I can blow-up but always have my original motor to swing back to. Let me know your thoughts.

Thanks guys and gals! :)

well you would be right if you were talking about the stock 2.2 intake. ours on the 2.0's won't have a problem. so technically to get to 400 hp we would have to update the pistions only. and as for the rev limit. it will be set at what ever the pcm is calibrated to. by putting those spring in it would mean that the engine is capable of 7500 but unless you get it reprogrammed it will still only rev to 6500. as for tranny capablities i don't know but i will email gm to see if they can enlighten me some more

well you would be right if you were talking about the stock 2.2 intake. ours on the 2.0's won't have a problem. so technically to get to 400 hp we would have to update the pistions only. and as for the rev limit. it will be set at what ever the pcm is calibrated to. by putting those spring in it would mean that the engine is capable of 7500 but unless you get it reprogrammed it will still only rev to 6500. as for tranny capablities i don't know but i will email gm to see if they can enlighten me some more


Sounds like I can jus throw on a Wet Nitrous kit now. :D

^^damn Right You Can!!! It Works, Believe Me...

^^damn Right You Can!!! It Works, Believe Me...


What kit do you have? How much is it and how tough an install? Also I've never messed with Nitrous, can it be set-up to spray via the PCM or does it have to be manual by the driver?

Thanks!