im just curious to know what your thoughts are on supporting mods for the twincharge kit thats coming out soon.. ive been told that the twincharge kit will be a direct bolt on kit that will be released in the next few weeks. no mods need to be done at all except clutch. im reading all these threads about guys needing like 5k in supporting mods to even be able to handle 300-350whp. if hahn is releasing this kit and saying its a bolt on that wont require and accessive build on the motor and its going to be at 300-350whp why is everyone saying they need so much work to be done to handle that power?
im just curious to know all your opinions on this subject cause im not too car literate and i want to get to know my car much more before i decide to spend money on modding it next year.

 

by the time u get the supporting mods for twin charged. i would say u would be broke. IMO

 

thats what im saying tho, they are saying itll be a direct bolt on and there wont need to be any supporting mods needed. if thats the casy why is everyone saying that they need like 5k worth of supporting mods just to handle 300-350whp?

 

They said its bolt on they didn't say your motor would last with it on.

 

I have been wondering about this also. Now I have never really heard of any numbers in terms of horsepower (but that’s just me) of what the Hahn twincharged kit will do; but, I have actually heard that the lsj CAN handle 300-350hp stock. But that is just what I have heard. And if im wrong than the only other explanation I can think of is that the kit won’t reach that 300-350 range a lot of us want.

Keep in mind though,

I have no idea what im talking about
lol

 

well, a lot depends, the stock clutch can take a lot of power on all three engines, but once you start pounding on it, it becomes an issue.

think about it this way, if you doubled the power, you'd prolly upgrade the brakes... but if you drove within the limits and didn't beat on the car, would you need to?

a lot of people upgrade things because they are racing, or driving with fervor. i'd say that with that much power, a good clutch and axles are pretty cheap insurance.

 

gm and hahn are affiliated, hahn has been doing racing performance with gm for a long time, i doubt they would want to release a kit that will blow your motor like that. these companies dont want you to blow your motor as much as you dont want to. if this kit had so many problems to put on they wouldnt go through the hassle of making it because they wouldnt want all the headaches to follow with it imo. also in the ecotec build book if you look at the 400hp application why does it say to use parts from the 2.0 lsj as an upgrade?? like i said im no professional at this its only my thoughts so dont flame me on this as im just trying to educate myself on this motor.

 

According to GM they think that the Heat from the Turbo will wreck the supercharger.

 

call me stupid, but i don't really see the point of all this, twin charging is a pain in the butt when a single turbo or big blower usually produces more power anyway.

 

Its aftermarket, gm doesnt care if it blows up your car for the simple fact they dont have to fix it since you bought an aftermarket part

There is no way the Stock Motor/Tranny will hold the twincharge in my opinion

It might for a month but then BOOOM

Buy pistons and a MLS HG at least and get a spec clutch

 

i definately agree with you on what you said, i mean im not the crazy racing type but i like to have the power at my disposal just in case i need to use it lol, i definately am not hardcore like most are on this forum. i just dont believe the lsj is as weak as people are making it seem. axles and clutch id definately agree on that need to be done.

 

It all depends on how you drive it. If your doing hard launches you'll need a new clutch and axels. You'll also need to stop wheel hop(traction bars, motor mounts, polys, etc). If you don't stop the hop your going to crack your tranny case. I'd also get an exhaust to handle the output(3 inch the whole way).

 

r u serious. GM is releasing a car that can blow your motor.

 

whats an MLS HG?
the twincharged setup i think is awsome and very unique and 350 hp is more than enough imo on a cobalt, i do agree that a single turbo or a bigger blower will get you higher hp in the end but remember,once you have a twincharged setup its easy to just take the bloer off and use that 16g turbo to up your hp to 400. i honestly wouldnt go higher than 350 hp , after that ill just buy a vette or the new camaro in the end and have much more potential for power gains.

 

yup 3 inch exhaust, traction bars, motor mounts etc will be good also but those are cheap compared to all the other work people are stating they need to handle the power. those mods will be done as well

 

why would they release a car he just said hahn and gm are affiliated

 

im saying that the stock Cobalt SS will blow a motor just as easy

 

you wont need pistons, as long as u keep the boost within reason, however, for mods for cooling, and a full 3" exhaust for the turbo would be extremely benificial. Other then that, as long as ur rev limit is in the 7000-7200 limit, and u maintain relative boost, u should be fine.

Twincharged, a member on ****************** had a custom twincharger he made on his car, ran 22 psi, and all he did was the head gasket, and exhaust, he put down 330 whp and 307 torque, which is where the hahn kit should be in reality.

Anyways to each there own, spend what u want, but as long as u have intake, full exhaust, and it dual intercooled, u should be ok, however, the head gasket would be the next thing id replace, at which point i would do pistons, but ONLY to up the boost, not because its needed.

 

i think youre right on that one, the only way id do pistons and head gasket would be for boost increase. the setup already comes with air intake, turbo exhaust manifold and 3" downpipe, all that would be needed is a 3 inch catback exhaust as far as flow goes.

 

oh yeah and for that id probably just stick on a nitrous ntercooler, spray some cold compressed air just to keep everything nice and cool.

 

The thing you have to do is to look at the amount of boost you will be making, how high you will be revving the engine. the amount of heat you will have to disapate, and where the weak spots in the car are. Hahn doesn't give a damn if you blow your motor so don't think they are going to build a fool proof setup. When they say you don't need any other mods they are meaning to install and run their kit. They don't mean to run their kit for 100k miles. If you want to run it realiably it's all up to you.

So start with the known issues of the car, the clutch and axles would have to be upgraded to run that kind of hp. You know that of course. While you have the tranny apart you should probably upgrade the flywheel just because it will be convienent at that point. After that my main concern is internally because I know there are a few guys here that have blown the dipsticks out of their cars and that leads me to believe there may be a weakness in the piston rings that is causing the blowby that is pressurizing the crankcase. I don't think it's a huge problem like the clutch/axle issue, but I think if I were going to be making more boost then I would nip that in the butt right away. At that point though it almost would be worth just swapping the pistons out because if you are going to have the engine tore down might as well swap them.

Then you have to look at cooling. That turbo is going to create a considerable amount more of heat so you have to take care of that. A dual pass IC is a must, plus a new heat exchanger wouldn't hurt.

Some other mods to consider are a bigger exhaust from the turbo back. Turbos don't like backpressure so the less you have the better. Also you will want to get your instrumentation all lined up. I'm sure that's a no brainer but a wideband, boost (duh), oil pressure, and EGT are all pretty important when you are heavily modded. Plus you will need all new mounts and anything else you can do to get the power to the ground.

Ok, I'm sure I have said a lot of what you already know and I know I repeated a few things already said but I think to do it right you will need a minimum of what I have talked about. I didn't even hit on the effects of revving the car higher then stock. I have never been a fan of that because it often causes more problems then it's worth because you get into valve issues with that, so look into that too. There is probably more you will need to, but I'm blank right now. To do this right it's going to cost you big, but that's the name of the game when it comes to modding. Good luck!

 

thanks for the input on all the issues that can occur ill definately look into all these things much more closely, as far as the dual pass intercooler goes what is that exactly, wouldnt the intercooler that comes with the kit be good enough? im just curious as im a little new with this setup and stuff. id definately run this mod safely if i put it on, i would just do supporting mods a little slower, like the pistons and head gasket etc. for internal work will probably be done when the boost will be brought up a little higher.

 

Basically a dual pass IC will split the flow into each core simulateously so that you get a colder intake charge as opposed to the stock IC which flows through both cores in succession. Basically it is just a way of making your intake temp cooler. I actually don't know which IC the hahn kit is using so theirs may be good, but I am wondering if it is a separate cooler then the stock cooler? Meaning if you run this kit will you be running two ICs? Ok, I better look into this a little more before I keep running my mouth.

 

lol its no problem man dont worry your not running your mouth, it will be two intercoolers i know that for sure

 

Matty Finch, I believe Twincharged hit 350whp and similar torque numbers with his final tune before he traded the car in.