K&N or similar cold air inlet

[Chris T]

Whilst at Wayne Schofield's he mentioned that K&N do a cold air inlet system that sits up behind the engine lid grille and allows cold air directly into the inlet. This he reckoned would be an improvement on the cone filter on a 90deg hose in the engine bay that I currently have. However, K&N's website reveals no such item. They DO make such an thing for the later water cooled cars, but seemingly not for the earlier ones. Has anybody bought/made something suitable? 

Thanks, Chris.

 

[SilverWT]

I remember a discussion on the principle of this on Pelican.

In the end it was debunked for an air cooled 911 as the calculated volume of air sucked in by the cooling fan meant the whole engine bay would not get hot when on the move, or at revs above tickover.

I guess someone would need to rig up a temp gauge to confirm the actual temp.

 

Mark

[Type911]

Think he's got his wires crossed, I have never seen anything like that for any air cooled car

[Ian Comerford]

A former IB member was working on something like this to get more cold air in. I think he called his car Blackbird or similar and he was from south of Bristol/Somerset area.  Can’t recall his name but if you search I’m sure you will find the detail

[Northy]

@Jammo 

2 hours ago, Ian Comerford said:

A former IB member was working on something like this to get more cold air in. I think he called his car Blackbird or similar and he was from south of Bristol/Somerset area.  Can’t recall his name but if you search I’m sure you will find the detail

 

[Nige]

I seem to remember something like that, was a butchered up air box trumpet used and attached to the engine lid grill, then a big fat flex hose to the cone filter to direct rammed/colder air into it.  

Can't imagine it yielding much improvement.  One thing I always think with Porsche engineers is that they're very good at wringing as HP out of the factory setup that they can.

There we go:

 

 

[flatsix777]

This is a little different for a 930 but I’ve run a cold air inlet for years. Reducing the charge temperature by pulling cold air through the tail and forcing the fan to draw all its air through the intercooler has got to help engine temperature and power at slower speeds. I have no evidence but I think inlet air temperature is a big gain for power and often overlooked. There would be much less effect for a n/a IB but I would think some at low speeds. 
David

 

 

[strosek34]

Good to see you back on the IB forum Dave.  Been a long time.