well i am picking up all the parts to supercharge my LAP tonight. I have everything except some of the gaskets and bolts. I will be taking pics and having some sort of how to as the build process goes...wish me luck!


P.s. any help will greatly appreciated cough cough GENE cough cough lol

 

good luck man, if you need any help let me know.
i did this build dec of 08.
5127398304. my names haza btw.

Casey(hunterkillers) guide will also be of good help, search for it. he has a how to.

 

good luck, any of us can help you out threw PM, alot of members have done it

 

Ha-ha. If you need any help from me let me know. Lots of info and my final parts list in my thread. It should be fun for you. It really makes the car fun to drive.

 

yeah...i am actually going to fab the lsj header today so it fits in with the SAI. Install wont happen till spring on the M62...no use driving around all winter and not even being able to hammer down at alll

 

Good luck! Have fun and take your time! The worst feeling in the world is knowing that you have to rip it apart because you forgot something.

Trust me, I know...

 

haha im in your position i need BOLTS!!! damnit

 

what did u forget to do?

 

IDK about him...but I forgot the intake manifold gasket part way through...had to remove the IM again and wait a week for it to arrive.

 

I forgot to install the M10 bolt that attaches the IM to the IM Mount. Had to pull off the supercharger and alternator to get it on after everything was buttoned up.

 

OP, what mods did you have on when you trapped 91?

 

If you need any help hit me up, i've done the build, and taken it apart ~4 times so i'm quite familiar with it.

 

CAI and full exhaust, and a little wider tires...thats it

i will do. Im just more curious how much faster it will actually be and how much boost i will be seeing

quck question about the exhaust manifolds....there is basically no difference between the LSJ manifoild and the LAP manifold except the o2 bung....is there?

 

Night and day. Your Cobalt will be a completely different animal. Supercharging these engines is like turning it from 2 or 3 all the way up to 11.

Check out Gene Culley's build thread for what he had to do to make his SAI work with an LSJ manifold. It just requires a little bit of cutting on the manifold to make everything work. Here's the post that you should check out: https://www.cobaltss.net/forums/show...&postcount=207

 

i saw the post he had and the modification he did, but i even measured all the primaries and everything is exactly the same....just an 02 bung....would it even be worth changing

 

Is there an extra O2 bung on the LSJ header or a missing one? If there's an extra, just buy an O2 plug and install some antisieze to it and torque it down. If there's one missing, take it to any muffler shop and they can weld one on for you.

 

i guess the reason being is that on an LSJ dp there is only one place for an o2 sensor, where on our cars they are both on the downpipe...

 

Sounds like you've got a perfect spot to put your Wideband O2 sensor, then. Put your upstream O2 sensor in the header, Wideband O2 in the upstream DP spot, and leave your downstream sensor in its current location.

 

First, you have to be certain you got an LSJ header, because the size is certainly much different than the LAP. You can normally get the part number off the header.

You can't use a LAP header and an LSJ downpipe. When you get both the header and downpipe off, you'll see the LAP header is slightly longer than the LSJ.

From what I saw....

LAP header is longer with a shorter downpipe.
LSJ header is shorter with a longer downpipe.

One cannot be interchanged with the other, and as I mentioned, the exhaust manifold ports and flow is much larger to allow more flow.

I don't quite understand your other questions.

How fast? That is really not something that can be compared apples to apples. Drivers, tune, elevation all play an important role.

How much boost? Well, it depends on the pulley.

On the 3.0 pulley I boosted 12-13 and on the 2.9 I boost 15-16.

 

well like Gene, i just fabricated the Lsj header to fit up to the SAI exhaust ports. Tomorrow, depending on whats going on i will install iit

 

How did you make out?

 

this gets me excited seeing everyone do this build! im slowly working on getting all the parts to do this to mine too. Gene your parts list owns all and is already a huge help.

 

header is all fabricated to work with SAI. will be installed soon

 

ull like it im running a 3.4 pulley and i love how it pulls

 

so are you guys actually using sai? or just modding the headers to fit and flashing out sai?