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Discussion Starter #1 (Edited)
I'm looking at pulling the Eaton and adding a turbo. A twin screw performs great but is definitely limited to how much boost it can provide. I don't think I'll have any problems throwing it up on ebay. I'll get the added efficiency of a turbo with as much boost as my motor can take.

Without a the supercharger I'll need an intake manifold, can the standard scroll composite intake take boost? The LS1 intake takes a ton of boost but I'm not sure if it's the same material or construction.

So are there any max horsepower numbers for the Fuel System, MAF, and Bottom End, head gasket, etc?

For an all out 1/4 mile machine GM has a 1200 horsepower Hydra-Matic, I wonder if it would fit:
http://www.gmtunertour.com/index.as...AFAA851&page=55CBA209F13F467ABBCA030DD03F98F5
 

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Hey i just rebuilt one of them today hah, it was out of a 99 intriqtue with a 3.5. But it was 100 % production parts i guess.
 

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You're looking at a big BIG tear up to do all that. Have you heard of a company called Gravana? They're currently developing a twin charger setup - adding a turbo IN ADDITION to the supercharger. That way you still get the low-end pull of the supercharger, the top-end of the turbo, and you save yourself from basically ripping the car apart.

Not to mention it'll probably end up being cheaper in the long run - one kit, versus buying new intake & exhaust manifolds, billions of sensors, ripping apart your engine harness, etc.
 

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DanM said:
You're looking at a big BIG tear up to do all that. Have you heard of a company called Gravana? They're currently developing a twin charger setup - adding a turbo IN ADDITION to the supercharger. That way you still get the low-end pull of the supercharger, the top-end of the turbo, and you save yourself from basically ripping the car apart.

Not to mention it'll probably end up being cheaper in the long run - one kit, versus buying new intake & exhaust manifolds, billions of sensors, ripping apart your engine harness, etc.
DEFINITELY agreed!!!
 

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Turbonetics has a kit in the works only problem being theres nothing you can piggybakc into the high speed harness so there developing a MAP system to eliminate the MAF.
 

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87camaroPA said:
if you would turbo the SS you might have to rebuild the engine and bring down the compression becuase the engine may not beable to take high PSI from a turbo but with the twin charger the boost is not that high.
boost is boost. Having said that, a supercharger gets you less net power than a turbo at the same boost levels because a lot of power is siphoned off to drive the SC itself, the effect gets worse the faster it spins. There is undoubtably a fair amount of safety factor built in from GM. A turbo will simply add torque higher up the RPM range than the blower.

Low down, the blower will generate lots of torque, as it dies off in the upper band, a turbo will add more boost as the engine starts to run out of breath (depending, of course, on the duration of the camshaft and the breathing ability of the heads). Essentially extending the torque curve (not increasing the value of it above the current maximum number, or at least not much <remember GM's safety factor>) and as a side effect, higher horsepower.

I was torn between an SRT-4 and the Cobalt SS, this kit will push me over to the GM side.
 

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Yes i know but the SS has a very high compression ratio and most of us are very surrised and with a high boost turbo you may end up blowing the engine that is all i am not saying that it is not safe but i would be very carfull what is done to the SS as far as adding more boost that is why i would just twin charge it. :)
 

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The turbo's higher boost would not occur until the head/cams is not filling the cylinder effectively at higher RPM, the added boost would help with the cylinder filling, but would not increase cylinder pressure beyond (or much beyond) the current peak torque figure, thus the cylinder pressure would not be any higher, so no danger to the motor.

LT1's with much higher compression can take 6lbs of boost with no trouble and close to double that with intercooling.

But to each his own. I have decided to pick up an '06 at the end of the Summer, you go your route, I will go mine and we will see what happens.

Have a good one!
 

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Yeah i know but i would feal much safer if it was built better but like you said each to there own. And let bigons be bigons. And if you are going that route keep us up dated on the build up and definaly let us know how it works out for ya.
And you have a good one. :)
 

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we have a piggy back system working right now on Brookes SS.






wheelburns said:
Turbonetics has a kit in the works only problem being theres nothing you can piggybakc into the high speed harness so there developing a MAP system to eliminate the MAF.
 

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I think before all of you guys look too deeply into this twin charging idea, you should look at how far the car can go with the blower in place. I cant imagine the twin charging kit costing any less than $2k, which is a pretty sizeable sum of money to have at your dispense for a factory forced induction motor. I almost think that maybe whoever introduced this concept to you guys did so knowing it sounds like a real good idea and he knew he can make alot of money from it.
Think about it this way. You guys are lucky enough to have some sort of power adder in place, so utilize it to its potential. Port the blower, port the manifold it mounts to if possible, upgrade the IC system where you can, port the head, spring for some more aggressive cams if available, and do the usual bolt ons. Obviously youre gonna need to look into whatever tuning system is/will be available for your cars to make the most out of your combinations, and if youre lucky HP Tuners will make a version available to you guys, as well as some sort of AFC which I would hope is available now or very very soon. After all that, if youre still not happy, then pursue some sort of turbo setup. But for the time being, work with what you got and prove that it does work. The GTP crowd has been doing it for a few years now with great success.

Or maybe I'm just crazy??
 

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Correct me if Im wrong but their are SEVERAl well selling turbo conversions for the GTP as well are there not! That produce AMAZING amounts of power?!!?!
 

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There is only one that I personally know of, and thats the CarTuning turbo kit. It performs well, but its also quite pricey. Pricey enough to where for the average enthusiast, less money would be better spent on a good IC setup and a ported lower intake and supercharger. You only see the truely hardcore guys going with the turbo setup, or the guys that have the money to spend on it and want to be a bit different. But in the case of you Cobalt guys, the car hasnt even been around long enough to need to be different or realize any kind of real potential with the current motor.
 

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Yeah I thought I seen one, in a GM mag once, looked pretty sweet. Never had the chance to see one in person though...yet. What do ya think bout that new GXP comin out?!?!? That thing is HOT!! They said the alum. block barely weighs any more than the old SC/v6!!!! Comparable weight, boost in power, REALLY FAT front wheels, etc etc.. I like!!
 

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port the blower, and work on increasing airflow everywhere else. all said and done a turbo setup on top of the blower with a nice fmic and alky system ull make mad power.
 

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Let me get this straight u bought an ss Cobalt instead of an SRT Neon for no reason. I f you buy a Cobalt stick to the supercharger if you want turbo trade it in for an SrT or build a Honda beater on the side moron.
 
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