Pelican Parts Forums - Cut slot into ducktail to increase airflow into engine

Pelican Parts Forums (http://forums.pelicanparts.com/)

- Porsche 911 Technical Forum (http://forums.pelicanparts.com/porsche-911-technical-forum/)

- - Cut slot into ducktail to increase airflow into engine (http://forums.pelicanparts.com/porsche-911-technical-forum/620729-cut-slot-into-ducktail-increase-airflow-into-engine.html)

build a snorkle out of fiberglass that goes over the roof.

http://forums.pelicanparts.com/support/smileys/128.gif

935s took air from the quarter-windows.

Quote:

Originally Posted by Flieger (Post 6153898)

You cannot get the air below ambient temperature without a refrigeration heat exhanger system (A/C) or using the phase change of liquid water to water vapor by misting an intercooler with water or packing it with ice.

Hand-held temp gun- you mean an infra red thing? Those only measure surface temperature and only if the surface has the right range of emissivity. The worst part is that the laser dot is really a gimmick. There is a little camera in the gun that has a cone of vision and it takes the average surface temperature of that surface based on infra red radiation given off by that surface. You need to be almost touching the surface for it to be accurate in regards to the dot.

Yeah..one of those infra-red thing. Just want to bring the engine room temp down as much as possible. All the metal/aluminum components (SC, intake, intercooler) absorbs tons of heat. I want airflow to cool these off.

Quote:

Originally Posted by Flieger (Post 6153898)

Is your main goal cylinder head temperature reduction or intake air temperature reduction?

I want to reduce the intake first. Lower air temp means more power.

Quote:

Originally Posted by Flieger (Post 6153898)

It looks like you have a water/air intercooler. What is the air temperature? The Aluminum intake will be a lot warmer than the air flowing through it.

The WA intercooler maintains +15 degrees above ambient...but I am not sure how accurate that is b/c my sensor may be getting heat soaked.

With the supercharger I would definitely recommend the use of water/methanol injection. I ran it on my supercharged mustang and now run it on my 930. It is the real deal...

I think he should try to get an actual air temperature measurement but he will always want it cooler.

The best way is the above mentioned water/methanol injection, but that runs out sooner or later.

Unless you have an overheating problem then you are solving a problem that you don't have. If you are ducting cool air to the intake that is a different story. Over cooling can hurt power and economy. There is a reason that EVERY manufacturer stopped using 180° thermostats decades ago. The NASCAR guys discovered that raising the coolant temp raised power until you get pretty close to the destruction zone. They also don't run thermostats so they are a bit conservative because they know that junk will block the radiator.

So do you have a cooling problem?
Are you trying to get cool air to the intake?
Or is it just a case of "If more is better then too much is just right"?

Quote:

Originally Posted by Quicksilver (Post 6154156)

Not having a problem. But just trying to get cooler air into the intake....well...if more is better then too much is just about right.