If your going all out... well then go all out right! Don't forget that an LS4 needs to be tuned for!

 

So when I do all this, will I be able to drive my car safely to get it tuned?

 

These kids with this tvs has a larger powerband **** are just talking out of there ass! If you go with a good bb turbo and you you find someone who has a clue about tuning, powerband won't be your issue. This skys the limit with HP. The only thing your need to worry about is which tires to go with. The ottp guys are good people they sell turbo parts too. The best way with turbos is to put together your own kit.

 

The sky is the limit? really? I would think the internals, tranny, axels, etc. are the limit!

Well it depends on how you do it... If you install all this in your drive way, the car isn't going to start and if it does it isn't going anywhere. I plan on getting the tune from OTTP and then just tweaking that either at the local shop or with hptuners

 

I tried to explain this. there's no use lol

 

I have been running 25psi with a bone stock motor with no problems 93 pump gas no meth anything and when I dynoed the car it was only holding 21psi with a 2.5in exhaust.... Made over 400whp on my old set up. This is my DD also so all i got left to say is grow some *****!!!!

 

^ Agreed

 

haha it isn't a factor of "growing *****" It is a factor that if my engine were to blow or if I dropped the tranny I would have no way to work or to get to university and back. What ddo you have for mods to get 407WHP cause that is impressive

 

Take a look at my vb garage and when I dynoed I just got the car running and I am stock motor, stock tranny, stock clutch and stock axles. I have upgraded the clutch since then 4 months of beating on the car was a bit much for the stocker

 

I've ran the LS4 TB for a few days untuned.. The car starts fine, but it idles at about 1,800RPM. Driveability isn't great, but it's do-able. The swap is easy so just do it at your tuners. Its a simple change of 1 parameter on HP Tuners.

The TB from ZZP is at http://www.zzperformance.com/cobalt_...=999&catid=174

 

yupp yupp! But if you install the stg.3 kit the car isn't going to run... unless you have a tuned PCM

 

Not to e-fight lol, but I've never heard that, and really it isn't a big deal. All you need to change is the ETC Scalar variable from stock 2950 (I believe?) to 4500 (4950 works a litttttle better). The PCM uses this value to compute how open the TB is. Since the LS4 is bigger, it is flowing more air but the computer thinks its not open nearly as much, so it throws things out of whack. It shoulddd run, just not well. You may have to give it more gas to keep it running and it may stall. Either way it NEEDS tuned. I think it's a worthwhile investment for as cheap as it is. My $.02

 

the stage 3 kit from ottp comes with a new pcm if I order one, isn't that one tuned enough to start the car and drive it to get a better tune?

 

If you are getting the OTTP Stage 3 kit, you can pay $25 extra and they will tune you for the LS4 TB. It is an option when you are selecting what you want with the kit. Check it out. Either way the car would start, it would just drive like ****. The OTTP S3 looks like a winner. I am considering it very much myself. For just a little bit more than the price of the TVS you are getting 80#'s, harness, plugs, tune, etc. That makes it worthwhile when the 80#'s are ~$180 themselves. Not to mention you have a base tune to get started. I figured since I already have the cooling and supporting mods, and HP Tuners, I'd be good to go. Now if only I can convince myself to drop another 2K into the car lol...

 

Yea, I'm gonna start with all the cooling mods, then do an ottp long tube header and solid mounts, then depending on how much $$$ I have left either do the tvs at the end of the summer or next summer, I may wait until next summer to do the tvs

 

^ Sounds like a good plan. I'd like to do a TVS but I just spent a couple thousand on my suspension and some bodywork. I may have to pull the trigger though..

My only concern is the OTTP tune.. I have HPT Pro, but I'm not a very strong tuner. I've heard there is still some existing issues with tuning the 80# injectors without a return style fuel system (which is something I won't buy). I would need a good working tune to build up from, not an existing tune that may have issues. This thread details it... https://www.cobaltss.net/forums/2-0l-lsj-performance-tech-47/jerky-acceleration-212452/ I trust OTTP as a good vendor, and I'm sure they will work through the problem and get their customers fixed up right.

 

I guess im gonna wait til they get the bugs worked out to buy the kit

 

doesn't matter you still need a custom tune. you tune a system on car A, then replicate the excact system on the same type of car, car B and use the car A tune on it, and it may or may not run properly.

you will not find a canned tune anywhere that puts down more power than a custom tune, when they are both done by competent people.

 

Yeah I didn't realize that their were that many problems with OTTP's stage 3 tune, but hopefully they get all of the bugs worked out sometime soon! Either way it would be nice to have a good working file and go from their with HPtuners!

 

Yea I may just buy ottp stage 2 for now to satisfy my need for speed until they fix the issues with the base tune

 

Yea man if you're coming from stock, OTTP Stage 2 will still feel a ton faster than stock.

 

Most definitely!

 

a base tune will always be a base tune if ur reffering to a canned tune.

 

in the other thread they were talking about how they are having problems getting the fule trims right with the 80lb injectors...

are they talking about getting the base tune fuel trims right, or the custom tune? Because if a custom tune doesn't even get them right then I'm not gonna buy this kit until someone knows how to tune the 80s correctly...

 

There are people out there that have custom tunes and are running a TVS with 80's just fine... But yeh OTTP is having some problems with there tune...