Hi, as anyone successfully installed a GT3 specific center radiator? I am doing this with all factory air ducts and brackets but I am running into clearance issue as the inlet and outlet are partially blocked by front panels.

 

Btw my car is a 2006 Carrera S 6mt. I also will be installing a GT3 front bumper cap and GT3 specific side radiators.

 

Let us know what you find, as I will be going down the same path eventually.

And if you decide the work is not worth it, and want to sell the GT3 rad parts, please PM me.

 

It will not if you are using the GT3 kit with hoses and brackets. The GT3 radiator vents out of the 'smiley' in the front bumper cover. Unless you've cut one, it will not vent anywhere so it's basically dead weight. There are other hose fitment issues someone mentioned in a previous thread last month. Maybe it was on 6speed. Do a search.

Edit: Do you have a GT3? I assumed is was a Carrera since you're in the 997 forum here and not the GT3 forum.

 

I know you mentioned GT3 "Specific", but I myself not sure if it will fit the S properly.

Here's my DIY with factory kit for the S.

https://rennlist.com/forums/997-foru...carrera-s.html

 

Thanks guys, I am using OEM gt3 bumper, radiator support, air ducts and hardware down to every nut and bolt. I also checked PET, the frunk part number seems to be the same b/w 997.1 GT3 and C2S.

Maybe I need to flip the radiator upside down, but that will require major cutting to the radiator support and I don't know if the hoses will fit or if that will introduce other issues.

I believe Mobonic converted his 997 C2S to Cup center radiator, so I think a solution is there somewhere.

 

The GT3 air ducting exits upwards.
My DIY above is the S kit and the hot air exits downwards.

 

Initially, are the side radiators for the Carreras andgt3 the same, I don't think so....

 

Yes, I think the side radiators for GT3 and C2S are the same. They have the same part numbers per Autoatlanta.

GT3: http://www.autoatlanta.com/porsche-p...section=105-15

C2S: http://www.autoatlanta.com/porsche-p...section=105-15

 

 

 

 

 

 

There won't be any definite answers without a wind tunnel, but generally yes.

It likely won't significantly increase the downforce, instead just reduce lift. Arguably they are one in the same, just the negative of eachother.

Bottom exit would increase pressure under the car and increase lift. Porsche placed the air exit specifically in a low pressure zone on the top to help draw the air out and keep it from going underneath. It likely doesn't add any significant downforce.

Fifty years ago, air under the car wasn't so much of a problem. There was already so much turbulence under the car that adding to it may not have had a significant impact.

Starting in the late 80s and 90s manufacturers started to pay attention to the underbody - there are lots of flat surfaces to smooth the airflow (and accelerate it if designed correctly).

But since the bottom is smoother, dumping air out the bottom can be even worse than in years past and cause more lift than it would on an older car.

But there are lots of variables, cross section of duct entry, cross section of duct exit, angle of radiator, air pressure, surface types, etc. You can route the air correctly but if the ducting isn't correctly designed you can still stall the air.