Is is real that i will can not combine these two mods?Has anyone did it?

 

As long as the headers end exactly where the stock headers do, you can combine any type of headers with Turbonetics single turbo kit BUT I am not sure how durable aftermarket headers would be with a turbo application. Stock headers seem to be very durable and up to the task of handling the heat requirements a turbo kit would have.

There is at least one guy with the turbonetics kit that has aftermarket headers. If you search the forced induction forum, I'm sure you'll find him.

 

Yeah Taurran has aftermarket headers (DC I believe) and he says it made fitment tough and that there is some rubbing/vibration as a result. He is also not sure if it has caused a little bit of power loss.

 

Its really not worth it if you havent installed them yet.

 

Tubular headers will help your turbo spool slightly better than the stock log style manifold. And you will see increases in horsepower.

 

The problem is no one makes headers designed for this application (spooling a ST kit faster) that will fit....

 

So,do i go for the turbo kit or first sell my headers???

 

I would toss the headers. taurran has repeatedly said the extra HP you MAY gain are not worth the crap you have to deal with to make them fit.

 

actually, since the diameter of the runners are larger than stock (on any aftermarket header), and the walls are thinner, the gas velocity will be slower, and there will be a larger delta T from the head to the turbo (you want this to happen inside the turbine, and not before because heat is power).

in other words, it will spool up slower. turbonetics could have changed the manifolds if they wanted.

 

[Homer] You are smart...SMRT!!![/Homer]j/k

No seriously you are the man.

 

He's right. I'm pretty sure my aftermarket headers are causing my setup to spool slightly slower, and I think it might be the cause for my lower dyno numbers (367whp). I'm planning on jet hot coating my stock manifolds and putting them back in this fall.

Right now I get an annoying rubbing where the band clamp on the downpipe is actually contacting he frame of the car. I think this is also causing a slight exhaust leak where at the turbine discharge, which isn't a good thing. When I'm driving the car with the stereo off and the radio up, I can actually hear the vibrations of the turbo spooling and the air pulsing through the downpipe as it contacts the body near my feet. The foot well on the drivers side gets a bit warm on longer drives too. The sound is bearable as long as I have the stereo on or the windows down.

If anyone has aftermarket headers and is going with this kit, I'd strongly suggest swapping back in your stock manifolds at the same time you install the turbo. The header swap is by far less annoying than the issues you will face to get the headers working. Not to mention, there's a very good chance you'll actually be LOSING power.

 

Megale,

sell your headers and go turbo. you will love it !


Tasso-

 

What's jet hot coating?

[QUOTE=taurran]He's right. I'm pretty sure my aftermarket headers are causing my setup to spool slightly slower, and I think it might be the cause for my lower dyno numbers (367whp). I'm planning on jet hot coating my stock manifolds and putting them back in this fall.

 

[QUOTE=jlimquest]What's jet hot coating?

Jet het coating is a process that coats the outside of the headers to keep the heat in. Turbos spin up the turbine side through hot exhaust gas. The hotter and faster the gas is the quicker the turbine spins and the faster the turbo spools. Jet hot coating will keep the heat from radiating out of the header pipes and keep more heat going to the turbine. Faster spooling is the result. Another bonus is that it keeps the temperature around the headers lower.