sterlingc1975

Check classifieds Link is below

https://rennlist.com/forums/parts-ma...-gt3-wing.html

X2Board

That belongs on a GT3, for a non GT 991, stick with the duck, or cup.

Slantnose!

I really like it.

Chris3963

If you put that on a non-GT3, are you going to get enough cooling for the engine? The GT3 has extra vents other just what the wing provides.

Chubby Racer

It's a water cooled vehicle. The radiators are behind the front bumper vents.

77tony

Looks great on a TT/TTS. IMHO it's bit much for a 991 narrow body or even wide body IMHO. T https://rennlist.com/forums/991-turb...-gt3-wing.html

Chris3963

Yes, I know it's water cooled and that the radiators are in the front because I have damaged one.....but that's beside the point. The GT3 rear wing incorporates a ram-air collector so the car has additional venting for the engine compartment between the tail lights to compensate.

I am posing the question that if you put a GT3 wing on a 991 what happens in the longer term without the addition vents between the tail lights.

Chubby Racer

Still incorrect. The "ram air" rams air...into the intake. In theory (though largely not in practice) providing a little bit of positive pressure (aka boost) to the engine. Nothing to do with cooling whatsoever.

Chris3963

I know it rams air into the air intake, thats why its called a ram air duct..D'oh...but the thing I would want clarified before I stuck a GT3 wing on my 991 is what effect it would have because under the engine compartment lid of the 991 are two fans for extracting hot air from the engine compartment. Only the vent in the middle is for induction. When the engine compartment gets too hot, the fans kick-in to extract hot air. I have even had my fans come on almost 5 minutes after stopping the car.

You stick a GT3 wing on a 991 there is nowhere for that air to go whereas a GT3 at least has an additional vent between the two tails lights.

Slantnose!

I don't think that's an issue:

Hothonda

Add some center locks too:

Chris3963

Thanks. That helps to clarify. It's not a area of the GT3 wing I have looked to closely at before.

997s07

No. Air is not "rammed" into the intakes to "boost" a higher pressure. NA engines do not want air to be rammed into them since it causes high turbulence in the combustion chamber and therefore an inefficient combustion. What intake manifolds try to do is decrease pressure so that intake turbulence is minimized. Back in the NA days of F1, the air scoop above the driver was doing just that as it flared at the very bottom and decreased the pressure into the cylinders.

Back on topic. A GT3 wing would look silly to me on a non GT car. That wing adds drag and is designed for a higher powered engine to push through air and put the car's aśś down. There will be a lot of understeer if you don't put the GT3 front bumper in also in addition to slowing the car at speed.

Chubby Racer

I think your comments about turbulence and decreasing pressure is a little off base. NA or forced induction, maximum power is achieved by maximum cylinder fill (with requisite fuel) which is achieved by maximum intake pressure. Obviously on an NA engine, you're limited to atmospheric pressure. The goal of ram air is to use the forward motion of the vehicle to create a small amount of positive pressure, ala boost.

Chris3963

Indeed, the ram air effect on the new GT3 RS via the ducts over the rear wheels is supposed to increase horsepower by 15hp at speed.