Hello guys. Ok, over the winter, I'm adding stronger axles, a different clutch/flywheel/slave cylinder, and a wideband that I'll use with my own HP Tuners software. Once these are finished, this will be the mod list:

HP Tuners with LC1 Wideband
60lb Injectors w/wiring harness
Custom 3.5" CAI with LT1 Maff
2.5" Supercharger Pulley with oversized tensioner
CTI Longtube Race Header with 3" Catless Downpipe
Corsa Touring Cat-back
Custom 2cnd Heat Exchanger
Snow Performance Water/Meth Kit
Exedy Stage 3 Clutch/Flywheel Combo
Zex plugs
INTENSE Tranny mounts
JBP CAB's
INTENSE 400hp axles
Custom Fan and IC Pump switches
Drag Bags
Aeroforce scan gauge
All runs at track are on 26x9.5x16 Hoosier QTP's

Now when spring gets here, and this is my setup, I'm not sure where to go from here. I would've had several 12 second runs had I not had so many clutch issues this year. With the clutch issues resolved, I see this setup netting 12.7's@110-112mph-however I won't know untill spring now. I've thought about a ported blower and bigger throttle body, but then thought that the gains really weren't worth the money. I've thought about doing some engine work, like a ported head, cams, etc, but that's really costly, and there isn't alot of options out yet for that. I've also thought about a blower swap, since the new eatons should be out by then, and there is some twin screw style blowers out there that I could custom fab a kit up with. Either way, turbo is OUT. I've never been a real big fan of turbo's, they just aren't my cup of tea. Sorry for the long post, but I need some feedback as to which direction to go. Take care guys.

 

Crack that bitch open, its time for some internal work

 

The next thing you should do with your car is put it on a truck and ship it down to Dallas....

But yeah, all that hoopla about the new eatons earlier would be cool on there

Pistons maybe?

 

omg the new eaton /drool

 

You could try out the new tvs supercharger for everyone.

 

I would say the internals as well. Also, if your not looking for strictly performance upgrades, you could do some exterior things and appearance mods. I may have overlooked it, but I didn't see lowering springs on your list either. Just a thought. No matter what you do, its still gonna be a wicked Cobalt at the track. Best of luck.

 

Jbody stage 3 head kit with internals, 75shot.

 

i wouild go forged pistons and head gasket for sure by now,shorter throw shifter too.id go the reliability route for a bit with supporting mods like stated above... then id do more work like bigger blower etc.

 

Thanks for the replies so far. Starting on the inside of the engine is what seemed to make the most sense to me, but I'm open to other options as well. The thing is, we don't have very many options for a ported head, cams, etc. Also, I don't want to up my compression ratio, so my only option for pistons drops my compression to 8:5:1 if I remember correctly. So, if internals is the route I do choose, I'm going to need to do some sourcing to figure out which parts to go with. Please keep the responses coming, I like seeing everyone's ideas.

 

I would do a Cometic and head studs for sure and pistons to compliment the already GOOD rotaing assembly . You wouldnt be necessarily stuck with the pistons advertised . If you wanted say ..9.0:1 , I would be on the phone with Mahle or diamond seeing what they can do for me . You can also move the compression up or down with the thickness of the headgasket . Beyond that I would be looking into some air flow management . I think all the easy bolt on/big gain mods for the LSJ are about tapped out . Time to dig a lil deeper imo . I think theres a nice gain in the cams , better valvesprings and more RPM . I personally think theres alot of power on the table there . Plus if you can get the air in and out of the head more efficiently , it should possibly bring the blower temps the 2.5 pulley is creating down slightly . Even with stock head ports Ive always been able to make a pretty big gain with a properly selected cam grind . Its one area I will be adressing with mine over this winter . Comp cams makes Ecotec cams , so they would be able to do a custom grind . I havent done all my reserch yet in that area though with this engine , so I cant guide you to shop that has the LSJ head figured out and knows just what it wants . I would say JBP , but all I can say for them is that they make cams .....Ive never seen any actual #'s for them , comment opinions or otherwise .

Also another area of gain most people dont think about is in the coolant . We have made very nice gains in hp/tq by simply switching to Evans coolant . Its basically propelene glycol , waterless , and operates 0 pressure . It basically raises the nucleate state of normal coolant to allow more thermal heat transfer from the engine and combustion chambers in the head . It would be a very nice compliment to your meth injection , coupled with the Evan coolant you should beable to further gain power by being able to run a more aggressive timing curve safely . I talked with evans and they told me our stock water pump and stock overflow bottle cap will work fine with this coolant ( alot of applications ave to run a different pump and radiator cap) He did say to NOT use it for the aftercooler though , as the temps do not get high enough to benefit and in that environment the 50/50 dexcool/water or straight water would actually work better .

I posted a tech article written by Ray Bohacz( this guys a brain) fully explaining the evans coolant .
http://evanscooling.com/articles/mar98htp.htm

Heres a links to evans site
http://evanscooling.com/index2.html

 

Silver Im actually putting Evans in my car. I have used it before and want to see how it will do with these things ya know.

 

Its the #1 thing , coupled with meth and tuning I wanna do with mine next .

 

Thanks for the responses! SilverSS/SC, very good post! It looks like the next step is to build the motor. Headgasket, headstuds, valve springs, valvetrain, Custom cams, cam gears, ported head, etc, etc, etc. Once I have the 8,000rpm redline, I will actually have to go up in pulley size, probably to a ~2.7". I don't see this blower lasting very long with a 2.5" at 8,000 rpms, lol. After the motor, a blower swap is in order. Thanks again.

 

Headlights

 

Personal Preference: I would stay away from any cosmetic mods. I like stock looks with killer performance myself.

 

I was jus bout to say , better save funds for the new eatons

Ya know , with some damn good tuning ( I assume ur still gonna use Rob ) ....with the evans coolant , if u just dropped from a 2.5 to a 2.7 and did nothing else ...I think you would come close to making up the difference in power by being able to run a lil more aggressive timing map . In a friend of mines blown 93 Z , he was able to find up to more 40 hp and picked up everywhere in the powerband . I really dont know how much is to be gained in the Cobalt , but it made a pretty diff in the blown LT1's ....I dont see why it would be any different for the supercharged ecotec .

 

i say get a ported head pistons and cams and then get the blower swap and watchyour car run 11's

 

None of the above. I'm thinking ..... CONVERTABLE!

 

Actually, I'm running 24 degrees of timing, on a pretty aggressive timing map. We haven't seen gains running more than 24 degrees.

Oh, and I'll think about the headlights and convertible ideas.

 

Bad06ss, have u dynoed yet? How much you think you are putting down.

 

Put a 50 shot after the blower, New Pistons and rods, then Valvetrain to up the rev limiter