Thanks for the feedback guys!!! I think I am going to give it a try, I want to squeeze a bit more power from my stockish setup!!!

 

As a vendor here I will add my .02
Don't expect to see any big change in spool up. If anyone is saying they are getting 400rpm quicker spool they are lying to you!
The power increase (anywhere from 7-15whp) comes from removing the restricions from the cast manifolds. A properly ported manifold is key..... I have seen many come to me that have been hacked up by over-zealous people. A true ceramic coating like Swain does a great job at keeping underhood temps down where they can be very high in a turbo application.
Take a look at my site. I have many options from porting only to differenct coatings.
http://www.paradigmperformance.net/p.../manifold.html
Thank You,
Wayne
PPI

 

[QUOTE=JRB_EVO;5158982]I have done some research on the forum without a definitive answer, as to if there are any gains or not in spool up by porting the stock exhaust manifold with a stock IX turbo.

It seems to me that porting the manifold will definately increase the internal area of the runners, which will decrease the speed of the flow as it makes its way to the turbine, and if I am correct this will hurt spool up.

So please correct me if I am wrong and if you have some data available to substantiate the gains share it with me :

 

im interested in those pics as well. i've got a spare manifold in the basement just for that.

 

I just installed my PPI ported manifold, and I have nothing but great things to say about the product.

 

why do people who port (which is good) always think they need to coat also. Coating really has no effect due to "skin effect" fluids and air travel fastest in the center and not as fast as your farther away from the center. Basically the air/fluid touching the pipe surface is hardly moving, so coating it to make it smooth and flow faster is really pointless.

 

Ceramic coating is only meant to help reduce underhood temps....and keep the heat/energy inside the parts coated. Even if its coated internally these coatings are not meant to improve airflow nor are they marketed to do such.

 

Keeping heat in the runners before the turbo is a good thing.

 

+1

Ive never heard of a coating increasing flow

 

I still stand by my opinion that its a waste of money and time.

Do whatever you want though, its your car.

 

Coating? I'd say that if you're drag racing it's probably not worth it. But for a track car, keeping heat in the manifold means that heat isn't heating something else up, like everything else in the engine bay.

 

A coated tubular cannot keep in heat as well as a non coated cast manifold. Cast manifolds do a great job at that to begin with. To your average car it is basically worthless. Though I have to admit it does make the manifold look a lot nicer than its rust finish. My suggestion is to just put on a nice polished heat shield and call it a day.

 

I do not, sorry. I'm basically going through and porting all exhaust components and intake components and slapping on an IX turbo before I re-dyno.

Do either of you guys have any direct experience with this? The ceramic coating keeps heat in the exhaust gas, and does two things. First, it keeps underhood temps down. This is the most noticeable change that I noticed. Secondly, and this is more theoretical than anything because real world it's hard to see any results, but keeping the heat in the exhaust gas and not seeping into the header will make the turbo more efficient, since heat = energy.

Doing ceramic coating at the same time as porting is a nice way to 'do the right thing' on your car. Yes you can just port it and see power gains, but having the mani coated absolutely makes a difference and is 100% worth it IMHO. Necessary? No.

 

Yes I do have a lot of experience. Unless you are logging the temps you will not notice it. If you are telling me that you can feel the difference then I am going to have to dissagree with you. Unless you track your car often I do not see going as far as coating the manifold other than looks. The underhood temps to not decrease drastically on a cast manifold with coating as a tubular manifold would be. Most people don't coat that to begin with. Look at turbo kits. Cast manifold just do a great job holding in that heat t begin with. If you want to go that extra step then it will help. It is not a must.

 

I also have the Buschur ported/coated exhaust manifold and when I pop the hood I can definitely tell that there is less engine bay heat. Another thing I noticed, with the coated exhaust manifold, the engine needs much less cool down time before I can handle the exhaust manifold heat shield and bolts with bare hands.