hahn ran 9psi on there test kit and got great numbers but said for everyday driving it didn't have the reliability they wanted. There kit will have 8psi.

 

A thicker head gasket will change your compression by like .01 or .02. Too thick and you're going to be blowing gaskets all the time. You're talking 1/1000s of an inch difference in thickness. A head gasket isn't going to even get you a .1 drop in compression ratio.

Best bet for boost is forged low compression pistons around 8.5:1 for lots of boost or 9:1-9.5:1 for a decent amount. We're at 10:1. Don't know about 4 bangers but forged low compression pistons run about $400-500 for a 355.

 

I agree. The LSJ manifold and supercharger WILL bolt right on. I would just go with the GMPD Jbody kit to start with, it comes with the neccessary tensioner and belt etc that looks to be identical on the 2.4 in the Cobalts. They'll certainly be a few "details" to sort out (like TUNING), and the fact the kit was designed for a speed density calibration (MAP only) not a car with a MAF sensor. The Jbody kit even uses a larger pulley than the LSJ for less bost IIRC. And with various outfits comimg out with tuned reflashes available for the E67 ECM used on the 2.4VVT, it might be easier than one would think!
Someone's gotta be the FIRST!!
HTH
WopOnTour



VVV Here's what you get in the GMPP kit VV and the instructions for installlation are in the Build Book on the GM Tuner site

 

what is the CR of the 2.0l supercharged cobalt

 

9:1 if im not mistaken

 

I think our comprssion is 10.49:1??? if so then we couldnt handle high boost.

 

http://www.theautochannel.com/newcar...s&trimid=17254

 

he wanted to know compression of the 2.0l s/c. read be4 u post

 

It's 9.5:1 and the 2.4 is 10.4:1

http://media.gm.com/us/powertrain/en...ec%20(LSJ).pdf
http://media.gm.com/us/powertrain/en...E5)%20rev2.pdf

However, IIRC the GMPP kit for the 2.2 has a slightly larger pulley to reflect the fact that the 2.2 is 10.0:1 CR.
http://media.gm.com/us/powertrain/en...ec%20(L61).pdf
Close enough IMO
WopOnTour

 

so how much is the gmpp kit?

 

Oops DELETED DUPLICATE POST

 

Well that will depend on who you talk to... the PN# is 17800003

BTW: The GMPP kit includes the super efficient Laminova cored exchangers in the intercooler, BUT does NOT include the electric CAC pump, reservior, hoses or radiator (as used in the 2.0 LSJ)
The lines are just plugged on the 2.2 kit
HOWEVER
There's no reason why it couldnt be added, with a little ingenuity.
Would allow you to run quite a more boost even at 10.4:1

WOT

 

good find on that s/c...that should bolt right up to the 2.4 correct? what custom would you need to get for that?

 

Sorry i was just assuming being that it is an 2.4 forum.

 

its cool not trying to be mean but i know where ur coming from, he had jsut started a subthread inside this by asking that question

 

i want it...

 

Your right it does look like it would bolt right up to the 2.4. Thats awesome. well if I can find someone who can tune this ecu to work with it i'm golden. I already have the motor torn down with a new bottom end going in. I was going to fab my own turbo kit but if that blower bolts up like you said it would than I will just do that. How much boot can that blower crank out?

 

i think 12psi. PM me i know someone who can help you out on the ecu tune.

 

well if anyone bolts the supercharger up to a 2.4 let me know what the cost and difficulty to install is

 

yea id be interested also

 

I wonder if GM performance can help us out on this??

 

Not sure if GM will help but I am in the process of putting my short block back together with a forged crank billet rods and billet pistons. I was going to do a custom turbo kit and post it up but now I am just going to do the blower if it bolts up right. I will most likely get it ported first though. Anyway I will keep you all posted on the build.

 

ok i found a supercharger off of a 2.0 for like 900 dollars. so if anyone knows what needs to be done to our engine to make it be able to handle the boost that the 2.0's supercharger puts out let me know in a pm or on this thread as soon as you can... id like to know ball park prices also if possible. thanks

 

here is 1 problem with the 2.0 s/c on a 2.4 , also its something on the 2.2 that needs to be modified

there is a engine lift bracket that is bolted to the head , and to clear part of the tensioner set up , you have to chave that off the head

now the 2.4 head for the cam timing is very thick to clear the bulk of the adjusters , this also might cause more of a issue on the 2.4 , than it does on the 2.2


gravana tuning , has a turbo'd solstice(same 2.4 motor) it dyno'd in the 250whp range

being the compression of the 2.4 , premimum fuel is a must , and you must run the car on the very rich side to keep detonation down

atleast untill HP tuners or someone comes out with a program to change setting inside the pcm

 

I am too nervous to buy it and then start shaving... I don't know enough about engines ^ ^ someone do it first to be the man I would but give me a price associated with this please. Also when you say premium fuel are you talking 93 or higher?