still working on the twin charge setup... just like the other post said, not likely going to be a consumer upgrade kit sold.

they did say however that i was incorrect on the eatons being so parasitic, they actually run better than most other roots style blowers on the market. they also said it was NOT a good idea to do a pulley kit on these blowers because there are alot of issues with the shaft bearings getting f'd up in the process or right afterwards. They said it's going to be about 12 months before they can really get into our cars because of the computers. GM is not willing to work with them very much on the fuel maps and such because of an incident a few years back when a person was killed because of the cavy's driveshafts being rated at 130mph, and the guy was going fast as hell when his front end blew apart. he died, and since then gm has been cautious of who they talk to and what they say about their computer coding.

they are working on a 25-30 hp upgrade here shortly without changing pulleys and such, but he had no estimated release times on it.

so it looks like we're down for even a longer haul than what i thought originally... i think i'm about to get with psi-fi and go ahead with their kit if it's gonna be that long

 

Good information there, man. I'm glad that I didn't go head first into modding the car like I originally planned if these problems exist.

However, the twin-charger not being a consumer product; what exactly does that mean for those who won't stop at anything to get it? We're going to have to read, and follow, I'm guessing. Just another long haul........


//Saki XL

 

Thanks for the info, that at least lets us know that GM is attempting that a quality product will be put out. I am glad to see the manufacturer and third party company work together. if I have to wait for a better product then I will just have to be patient.

 

someone else posted some info about this a few days ago... they said it was going to be about $8000 and you have relocate the fuseblock and braking system stuff. the brake system they said was going to be pretty hard, and that's the reason they don't want to release it. they said they're working on an m90 upgrade kit that will give us about the same amount of power that the twin-charge was going to offer, for a fraction of the price.

 

IDK what kind of problems they are running into........ it would be a piece of cake to install a turbo on this car (just a little creative piping). The tuning would be the hardest part...... at least from my perspective.

 

they have to relocate the entire abs system and fuseblock. i don't see anything easy abotu moving a braking system

 

they arent just turboing it, they are twin-charging it. COMPLETLY different from just slapping on a turbo. With a turbo and a eaton sc, the turbo will over come the sc by a long shot. however, most eatons put lots of torque down low, so you use the eaton for the low end and to spool the turbo (small engine+sc=big engine) so a bigger turbo can be used with more cfm per psi and better top end. You need to be able to open up the BBV to let the air the sc is making escape and so the sc wont get in the way of the turbo. So once the turbo reaches, let say, 1 psi, the BBV opens and the sc is just basically free spinning and not really making any boost. However, if you didnt have the SC on, the turbo would not spool as quick giving you what i call supra syndrome. A slug off the line, but killer up top. If performed correctly, a twin charge would be an awesome car.

 

I don't know about anyone else but if the twin charging produces enough of a gain, I'd rather spend the extra money and get it, instead of a pulley swap.

 

extra money as in you're willing to pay the estimated $8000 they say it will cost to do it?


if so you got more money than you need to be buying a cobalt ss

 

An upgrade to an m90 with the same result sounds better to me. They estimated 300hp on their project.

 

jim@gravanatuning just told me , that he has the b&m short shifters in stock for the cobalts , and has clutchs for the 2.2 , nothing for the 2.0 yet

 

We also have the shifters in stock for the regular Cobalts and the SS. MaximumBoost.net


Thanks for the info about Gravana by the way. That's ashame that it's going to take them that long. He's a great guy

 

resurrection..lets find out some more about this...

 

As stated in another post as far as some people are concerned they dropped this project. Just too much work to do it.

It would be just as efficent to put a remote mount turbo at the end of the exhaust system and would still get the same results with little to no lag at all with a proper tune. Plus you have unlimited room to work with and no turbo will not have a short lived life as others stated if it's put in the right areas.

Some cavailers are sporitng remote mount turbos on 3x00 3400 SFI motor swaps running 10-12 PSI on a stock motor doings 12's all day long.

Here is the Link

 

please take time to reread my post and what i quoted...

 

M90 is not feasible because it will shatter the internals if anymore then 12PSI is pushed into the motor. Most of the internals on the LSJ are only rated for 300 whp from what I read.

 

ill believe it when i read it...with it already having forged rods, etc., i bet you itll do more than 300. maybe 300 without some other form of tuning help...ive seen way too many other cars with weaker internals make alot more power. my only though of problem with the m90 is if there is gonna be a way to avoid (which im sure there is) the snout hitting the upper tie bar (rad support)

 

LSJ - 475 hp

2.2 - 275 hp

....are the factory limits on the shortblocks . The LSJ engine was built to withstand quite a bit .

 

nice...very nice. 475...thats a freak of a car...hahahaha

man i cant wait for the first big power mods to start dropping...

 

Problem is not the shortblock... or the crank or the rods..... Its the pistons. They are not forged and according to the GM performance article about the LSJ build up to "300 hp" the pistons require replacement

 

but you don't need to run as much psi with bigger blowers, the point to it is that it will provide the same if not more power with less psi through volume, then when you get the supporting mods done you can start to tweak the boost up.

 

Hmm...

I wasn't able to find out any specific data on the LSJ piston. I did find that they are different from the L61 pistons. I don't know how however. If the L61 piston can handle 300HP, and the LSJ is a better piston, I have to believe it can withstand a higher load.

 

Superchargers are rated for CFM not psi.

GM Racing has already said it's not a good idea to use the pistons past 300HP. Therefore, we shouldn't use them past 300HP.

 

^^^ I think that someone should test GM's rating, because I think that GM could be saying that just to make money off of some "upgraded" pistons that might not be needed. Someone really needs to throw either a good 100 shot of nitrous or push 20+ pounds of boost WITH a good professional tune and see what happens. 300 horsies is pretty decent, but its not enough to keep up with some of the more serious cars out there, such as SRT4's and turbo B18 and even B16 hondas.
Im sure come spring time a few people might try to push the limits to see what they really are. But I still think the 300hp claim might be BS. Just my $.02

 

Better question is does the LSJ have enough fuel for 300 horsepower?