Can anyone provide some analytical proof about this spring? Our turbos don't make much boost at higher RPMs as it is, so why would having the spring help?

 

I don't like it. I got a bypass valve error code with the dejon spring. I fluttered all the time. The boost hold and bypass noise was kick ass though.

 

What is the downfall to the dejon spring?

 

It hasn't been confirmed but I hear it shortens the life of the turbo. Where as Forge doesn't.

 

Never heard that, where did u hear that? I will find the info n post on where to find it, others do so as well more info the better

 

Yeah, the spring is ten bucks. It is stiffer, and helps hold boost, but im sure there is a set back, unless im just peranoid...lol

 

The flutter is what causes shorter life of turbo. Not the spring itself. There was a big thing about it like a year ago or so. I searched and couldn't find it. Anyway, I could be way off base, but I'd rather not chance it. That's just me. Losing 3 pounds of boost by redline isn't gonna kill me IMO

Anyway, this is why I took it off. The Dejon guy, Dave (Dejon guy) I believe got mad at me as well for saying it caused a CEL in my car and I didn't post proof. Well I put on my stock spring and cleared the code like everyone suggested so I couldn't prove it anymore.

Anyway, I did throw it away dude, sorry I can't find it anywhere. I tried giving it away for like a year. No one wanted it, but I don't wanna discourage you from something you wanna do. If your hearts in it, by all means jump. It's $10, I can think of more things to waste $10 on.

I can't remember the other user I knew that had it. I believe it was HB something. He had one, if I remember, I'll PM you his name. You can talk with him about it.

 

Enough said brother. Dont want it...lol
there goes number 2 on the list...lol
how about best charge-pipe?
There is stock designs, and ones that are straight...i like the zzp ones because they look stock, but the injen ones are better i hear..

 

had mine in for over a yr and tuned, i tried searching as well cuz ya it was like a yr or two ago about the issues with the stock spring leaking not creating a good seal with higher boost, everyone i know personally who are mechanics who have and have owned turbos that was the first thing they did, OP your just gunna open a can worms with who makes what better, anything is better than the STOCK PIPE, if you hear that injen is better than go with that

 

The Injen seems to be the favorite, if you buy upgraded couplers. Apparently, the Injen couplers are too short and hard to install. If you buy some upgraded couplers from siliconintakes.com or somewhere like that, it'll cost you more, but you get an easier install that won't leak. Also, I think the Injen comes with crappy clamps, so buy some good clamps for it.

The ZZP pipes require you to either hack up your stock pipe to get the silicon hose ends off, or you need to buy their upgraded elbows, as well.

 

Damn, thanks^^^

 

Just get the Modern Performance upgrade kit for the Injen charge pipe. I have it and it's pretty nice.

MPx Upgrade Kit For Injen Cobalt SS Pressure Piping - Intercoolers & Hoses

 

Cool, thanks man

 

I actually found my spring and if you still want it PM me! If not I'm gonna try giving it away again. I am not gonna pay for shipping though. It weighs less than a pound coming from wheat ridge Colorado.

I'll do it legitimately on the for sale thread with photos and all that if its an issue, but yes free with shipping.

 

I definitely would disagree with saying that the Injen pipes are "better". I say this mainly because the Injen pipe itself is made of a MUCH cheaper material than what ZZP uses and the pipes will actually crimp when used with t-bolt clamps if you're not carefull. The Injen pipe is the only aftermarket pipe I have ever personally had issues with crimping, not only with my car but others have had this issue as well.

With that said, the injen pipe is definitely less money, especially when you factor in buying the upgraded silicone elbow from ZZP as well, BUT you get a much higher quality product and they already come with much better couplers and t-bolt clamps with the ZZP pipes.

Aside for any other bolt-ons, one of the, if not THE absolute most important thing you can do to your car before you get a tune is to install a brand new bank 1 o2 sensor (aka stock wideband sensor), clean your maf and both map sensors (DON'T USE CARB CLEANER!). Considering that I can only assume you most likely have over 20k miles on the car at this point, this is the cheapest yet best thing to do in order to insure the car is accurately and safely tuned. No matter how good the tuner is, if the car is not responding correctly to a commanded parameter you will no doubt have issues. Some tuners will actually refuse to tune a vehicle until at the very least the o2 sensor is replaced..

Just food for thought..

 

I've never heard a single good thing about that spring. Lots of issues with flutter, surging, etc. If you're dead set on upgrading the stock bpv in some way get the forge BPV, it's metal, and much stronger than the stock one.

 

I have a CAI, downpipe, hot side charge pipes, and tune. Thats it. and everything is perfect not a single problem and im at 23psi. IMO make sure you get an intake, downipe, and charge piping. those are the major ones to get before you get tuned then you are good. you can get an intercooler if you can afford that as well but i just didnt feel like dumping even more money. search around on the forums though for slightly used parts. they pop up all the time. i bought a zzp catless dp with angled bung with 4k miles for 115 shipped. and i see intakes pop up on occasion as well.

 

never even thought in that direction about the sensors, so this is the kind of info i was looking for, not really bolt-on info...thanks for the reply, and i will look into other hot-side pipes as well...good looking out man

 

If you buy the 3bars, you don't have to clean the 2.5 bars.

 

I see CED has the pigtails, where can i get the sensors? I didn't see them on CED...

 

3 Bar MAP Sensor 55206797 - Crate Engine Depot

They're not for the Cobalt. That's why they're not in that section. They just happen to kinda fit if you don't count the Coldside fit.

 

So if you buy the harness from CED they take care of the 3 wire and 4 wire issues between the sensors and make everything compatible.

So harness kit plus 2 of the sensors linked above will set me up with a 3.0 bar setup to accurately read higher boost levels...

 

so i am just gonna get the zzp tube/k&n filter, zzp hot-side charge pipe and new spark plugs before the tune...Hope all goes well, and i will let you guys know...

 

Sounds like the best plan, other than a metal IC.

 

thanks man...intercooler will be baught when it blows...lol