IonNinja

Nope don't supercharge it, turbo it. You'll be glad you did once you decide you want more.

Whatever you do, don't stay N/A

ml2242

WAY too many complete scrubs giving you terrible information on what to do with your 2.2 L61. I was one of the first people to throw the m62 on my 2.2 and I have had ZERO issues after 28k+ miles and 4 years (low miles i know but I love my sport bike)

I have run a setup of 16psi equating to 250+WHP especially in the colder months as I dyno'd 248whp @ 98F and 75% humidity and have since dropped a pulley size. If you run all the necessary supporting mods for cooling and have the car tuned by someone OTHER than the trifecta idiot out in Washington state you will be just fine. THERE IS NO NEED TO FORGE THE BOTTOM END FOR AN M62!!!!! Unless you plan on running cams and a 2.6 pulley or a TVS.

/end rant

nhanson

iTrader: (1)

If this is your DD then supercharge it. It will be more fun with no lag.

klotzy_550

iTrader: (1)

I did it. I approve. It will definitely bring the car to life.

klotzy_550

iTrader: (1)

Also, I had a talk not too long ago with one of the other engineers at work that designs our connecting rods and he said they usually have a k factor of 25 - 33% which is a safety rating above their power ratings. So say we have an engine with rods that are rated for 100hp, technically they would be good up until 125hp - 133hp. This accounts for knock and all that fun stuff...As long as you have a good tune this shouldn't be a worry.

ml2242

Don't you have anything more constructive to do with your time?

ml2242

So our rods are rated at 125 + 25 -33% would calculate to ~167whp... Sounds like someone is talking out of their ass here as every 2.2L with an M62 is pushing over 190whp unless they have their boost tuned way down.

My research back in 2008 on the 2.2 block led me to believe that the stock internals were good to about 275whp or so before you have a legitimate chance of snapping a rod @ WOT with an "un-perfected tune"

Pedobear

iTrader: (37)

magic number there seemed to be around 250ish not 275. but that varied car to car

nhanson

iTrader: (1)

The only reason the "250" number came up was because GM tested the internals. They tested with nitrous though which is a harder hit than boost.

A few have seen 300whp on stock motor.

ml2242

Im above 250 whp and have had no problems beating the **** out of the car once and a while.

I think you're spot on with the nitrous statement though now that I recall!

owlwyn

so my internals will be good with just a blower and some other bolt ons? OK.
what about my axles? that's the other weak point in cobalt seems to be them. they should be fine as long as I don't launch the **** out of it every chance I get right?


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owlwyn

and on a side note where can I go to get my car tuned?
I live in Maryland (cecil County, Rising Sun)


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nhanson

iTrader: (1)

Yes you will be fine. Axles will be fine as long as you dont wheel hop.

Find someone local with HP tuners.

rcarr0327

iTrader: (1)

i just sold my turbo kit off my car. i had 235hp and 250tq and my vvt was fucked until i took of my kit and fixed it.

if you know 110% what youre doing then the car should run right and should last. i had my turbo kit for over 20,000 miles at 8psi and internals are fine.

as for spending/ wasting money, its up to you if you want to put all that time, hard work,and money into a car that is worth like 7-8k.

drumrush

iTrader: (8)

Keep 3k handy for a rebuild

drumrush

iTrader: (8)

Granted I'm at 10k miles supercharged at 13psi, not showing any mercy, no problems yet. But I have a bad feeling she's gonna blow. Dynod 213/199 on a hot ass day on a lower reading dyno

cranemaster

turbo it and aim for 200-210WHP... call it a day. Still a phenomenal increase in TQ and HP...

You are adding 50-70 HP and TQ.. what more can you ask for without building the car up.

klotzy_550

iTrader: (1)

When I said "one of our rods" I was using an example from one of our outboard (marine) engines. What I am saying is that GM has some sort of safety net calculated in over their ratings. The stock rods are rated at 250 HP, safety factor would be calculated in after this.

ml2242

Ahhhh gotcha. Thought it was calculated after stock whp. This make much more sense

klotzy_550

iTrader: (1)

Lmao, if we were rated at 100 hp we would all be in a world of hurt.

IonNinja

rods are tiny but they are generally not the first thing to go on these motors

l33thax3d

Supercharge it!!!! you ill have alot of fun

owlwyn

then what is? from my understanding that seemed to be the weak point on them


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ml2242

I think your worrying a bit too much about what could go wrong. You really can't JUST replace your rods or JUST your sleeves ect...

Either bolt the SC on and trust what we have told you or your going to have to build the entire engine up now. As for failure of non-internal engine parts... fix it when it breaks....

owlwyn

I'm not really worried, I'm just trying to figure out what will/can break in the future.


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