well hopefully going to be supercharing this spring as long as the deck i build on the house doesnt eat up all my free cash. im just starting to learn motors, its all pretty new to me for the most part. eco swap wasn't bad but when it comes to really opening up a motor im somewhat lost. so my question is how far could i take the s/c before i tap out its power. the book says the conecting rods are what seem to be the limiting factor. i was basically hoping to do all i could motor wise without having to pull it and redo the bottom end but if the rods are only good to 250hp or so it looks like besides adding the s/c and cooling it properly there isnt much more i could do to boost the numbers without digging into the bottom end. i mean is getting a new head p/p worth it if my limiting factor is the rods? some how i have a feeling either way it goes with as much as ive done to the car allready im going to end up with a spare block on a stand getting built up over time.


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I'm not experienced with engines at all, but it seems to me the logic would be as follows:

I feel like with a small enough pulley, you could easily make 250 hp with an M62. Unless that's untrue, a p/p head would be a.. well.. let's not say a waste of money, but until those rods were replaced, it wouldn't be necessary. If you replaced the rods, then you could push the hp limit a bit more, and a p/p head would be helpful with that.

In summary, until you replace the rods, I wouldn't bother with the p/p unless you are planning on replacing them eventually, and just want to get the p/p done with.

As stated, I know nothing about engines, this is just my opinion. Somebody please comment on my post even if it's all wrong, and just let me know what I said that was incorrect/stupid. Thanks.

I'm in the same boat. I am fully building my eco motor before it even goes into my car because i know i am going to wanting to be going with a small ass pulley. Its going to be a huge upgrade from the 2200. I've already got the M62 kit. Once the motor is broken in, on goes the kit, and when that gets boring, 2.7" pulley and larger injectors and HPT with new pcm.

my goal is 250-300 and i'd be happy camper.

I think the weakest link is the pistons. So I would imagine forged rods and pistons and the sky is the limits (with the charger).

i've always heard rods too. i think rods and the p and p head really depend on your power goal. if your shooting for 250 it would seem that you would be ok, but 300 would probably put you on the unsafe side and into the area where you may need a little more work in other areas then just upgrading the charger (patriot head,cams, etc) i'm sure you know most of this and somebody may be a little more helpful, but no matter what, you will have to decide how much power your looking to get out of it.

so am i goin to be the guinea pig jason?


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my carDomain updated 11/5/07 I've got premium. Yes I do. I've got premium. How 'bout you?

s1lver_N1p wrote:so am i goin to be the guinea pig jason?

sure, will be nice to have someone else try it out first.




here's my power goals. ??????

im getting the s/c put in. with some type of cooler. full exhaust cai and that will be it for now. if redoing the top end will gain me some hp safely great. but i dont want to risk blowing the engine at all. so im not looking to run it out as far as it goes. now. as with everything else on the car i keep taking things further and further so it may come time to take it a step further which im guessing is going to be rebuilding the bottom end. and im just wondering what could be attained with a bulletproof bottome end and a s/c on top. will i gain much more or will the s/c peter out on me afer a rebuilt bottom end. gm's engine build book switches over to a turbo once you get past the initial s/c install. you'd think if they could get allot more power out of it they would. makes me think once your hitting around that 300hp mark the s/c loses its steam.


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cobalt ss guys are hitting 325whp with the cahrger, so im confident that a 2.2 can get somewhere around 350whp before the efficiency limit of the m62 is really starting to go downhill. there is an endless amount of mods you can do to a charger setup. as for the weak link, in s/c its the rods, turbo its the piston ringlands. get those rods and pistons done and your possibilities for the s/c are really endless to over the 300whp mark. port and polished m62 charger, lsj header, full 2.5" header back exhaust, 2.5" or smaller pulley, heat exchanger. intake, ported head, cams, alc/meth injection. there is tons of stuff to be done

Bonnett wrote:cobalt ss guys are hitting 325whp with the cahrger, so im confident that a 2.2 can get somewhere around 350whp before the efficiency limit of the m62 is really starting to go downhill. there is an endless amount of mods you can do to a charger setup. as for the weak link, in s/c its the rods, turbo its the piston ringlands. get those rods and pistons done and your possibilities for the s/c are really endless to over the 300whp mark. port and polished m62 charger, lsj header, full 2.5" header back exhaust, 2.5" or smaller pulley, heat exchanger. intake, ported head, cams, alc/meth injection. there is tons of stuff to be done

the LSJ bottom end is a little stronger though. turbo/sc doesn't matter. No question the issues are the ringlands and rods. Personally I'd be more concerned with the rods. Top end is fine really...the weakness is in the bottom end unfortunately. Which means you'd have to pull the motor out of that gorgeous engine bay again. I'd just throw the s/c on there, polish it nice, maybe a single pulley upgrade but stop there. After that you're spending quite a bit more money and a lot more potential costs.

I have plans to build mine up next winter once I return to the states. I am shooting for 300 whp myself and think without a doubt, the Eco + SC can do it!

There is a limit though and anything beyond 325-350 will require a turbo.

You'll have to have rods and pistons as well as port and polish both the head and charger. Get some nice blower cams, little alky injection and HPT (or other tuner) and all the supporting bolt ons (header, 2.5 inch exhaust, CAI, pulleys, injectors, etc)...300 should be right there...maybe even a bit more!


Eh...old man with a Corvette now...it was bound to happen sooner rather than later right?