Can you post pics if you have one? And where did you buy it who sells em?

 

WHad Up Rome

They dont come polished....you have to take it and have it done yourself. RobertK is someone that comes to mind that has his polished.

You do know that if for some reason that you have to have it warranted
and its polished...they will void it.

 

Wongy has a polished cosworth plenum. Originally Cosworth supplied them unpolished only, so we had our guy do his. In the future I believe they will be offered in polished form from Cosworth for an additional charge.

http://blog.injectedperformance.com/...omer-Cars.aspx

 

rome not going to post pic of my enigne bay yet but here are picks of my cosworth plenum on chris's car

 

Very nice!!!

 

Cosworth has been directly offering polished intake manifolds since this summer.

Romey we had a few but they were all sold. Here was the for sale thread:

https://my350z.com/forum/engine/3788...num-stock.html

 

definitely a dope piece.

 

yea imma get 1

 

That's good to know Mike. I had no clue that voided the warranty.

I actually thought about getting mine polished but not now

 

I have called them earlier about if I had mine polished..... and cosworth did say if it did not come that way from them they would not cover it.

So if they are now polishing it..thats good to hear. But I am sure you do know that polishing thins out the plenum....so now that Cosworth is offering polished version....do they start out with a thicker plenum so that when they polish it ...it ends up with the same thickness as the unpolished version If not I guess its ok to have mine done.

 

Just throwing this out there, but maybe another, less invasive option would be to powdercoat the plenum (for instance PC red with the two "Cosworth" logo's in black).

 

I did ask about the powercoating process....I guess they did not want to give me a Yes or a No on that...but all he was willing to say is that "polishing changes the dynamics of the plenum or reduces the wall thickness..but powercoating does not".

All he said he was willing to say is.... "ANY changes to the original plenum will void any coverage."

 

Jorge...That metal piece that goes from the carbon fiber to near the plenum...do they have that for the G's I alway liked the way that under hood looks...very clean

 

makes sense to me...they don't want to cover a part that they did not directly do. Pretty std. procedure for any manufacturer - if altered in any way, they don't want to be held responsible

 

You have to love Cosworth plenums...

Polishing them voids the warranty... and sometimes the carbon fiber end caps blow off... but we all still want one...

 

cosworth is retarded. try explaining to them that you are polishing the plenum as a means of reducing stress risers. they can't possibly prove that polishing a plenum would reduce the strength of the plenum. you are rmoving only enough material to give the top a uniform surface thickness!!!!

also, if they are that concerned with it, maybe the plenum isn't very stout!!!!! ..........and then, you probably don't want to buy it in the 1st place.

 

Good point...but the concern was more dealing with the polishing of the area where the Carbon Fiber meets with metal. I do see their point though...you run the buffer too long in that area and you could have a problem.

Luie had a sealing problem with his plenum....If his was polished...they would have pointed the finger to the polishing.

 

it makes no difference apparently, when intense ran 20+ psi on the twin gt37r kit it was with the polished cosworth plenum and cf caps were fine

 

Incorrect, only suckers apply

 

Here's Marty's