Carl Fausett

My name is Carl Fausett and we are a Rennlist sponsor.

Our company, 928 Motorsports LLC, is one of the Big 3 in the 928 world, where we have developed supercharger kits for every year and model of Porsche 928, among others.

We have an interest in developing a supercharger kit for the v6 and v8 NA Cayenne models.

I would like to invite the members of the Cayenne Forum to provide some input during the design phase if you wish.

I can tell you that our design objectives already include the following:
a) it will be an externally mounted bolt-on kit
b) it will not require disassembly of the engine to install
c) it willnot require any special engine preparation before installation
d) the Air Conditioner will remain in place and functioning
e) the polution control equipment will remain in place and functioning
f) price target to be between $5k and $8k

The first kit will be Stage 1, and following its success, there may come about a Stage 2 kit. I think the high compression ratio of the Cayenne will be a particular challenge, but can be overcome.

If you have any ideas or suggestions, feel free to post them here. I listen well. That's not to say every suggestion will make the kit (that isn't possible) but good suggestions just may at that.

Also tell me what does or doesn't work (if you know) as I expect a few Cayenne's have been fitted with centrifugal superchargers by private parties already.

Here are some links to cars we have already developed supercharger kits for:

The 32v Porsche 928
http://www.928motorsports.com/parts/32v_stage2.php
(the pictures on this kit are very beautiful, click on them to enlarge them)

The 16v Porsche 928
http://www.928motorsports.com/parts/stage2.php

The Ferrari 308/328
http://www.928motorsports.com/parts/...ger308-328.php

The Ferrari Mondial
http://www.928motorsports.com/parts/...percharger.php

Harvey Yancey

What kind of ballpark HP/Torque increases do you anticipate with such a kit?

Carl Fausett

Just came back from the Porsche dealership where we studied the base Cayenne V6, and the Cayenne S V8.

The V6 is certainly do-able. There is room for the centrifugal supercharger and we were also able to sketch out the routing of the charge air tubing including an air-to-air intercooler without too much difficulty. The factory crank pulley is small at under 6" in dia, but I saw we could add our own drive pulley on the nose of it.

The V8 was not at all the same story. The bifurcated intake uses two separate MAF sensors, and that complicates things immensely. We could not find room for the SC head unit, nor the tubing to it or from it.

In both cars, the question of the advanced engine management software poises concerns. We must be able to knock the fuel system off of Stoich to fuel the supercharger correctly, and I have some concerns that the Porsche engine management system will fight these changes tooth and nail. There is a fair amount of anti-theft circuitry in the system, and even the V6 model had 3 O2 sensors showing per bank!

In conclusion, we only really see the V6 model as plausible, and then that limits the market sharply.

Given that the V8 is only $10k more than the V6 on the used vehicle market – it does not make sense to supercharge. Now… the turbo was $35k more than the V8 – so an aftermarket kit does fit nicely into the price line and make some sense. If it was possible for us, which it is not.

cordsig79

subscribed Carl.

Harvey Yancey

Did you look at the Gen 1, Gen 1.5 or Gen 2 Cayenne's?

Carl Fausett

we looked at a 2006 V6 and two 2008 V8's.

cordsig79

while researching the engine so more, I was looking at audi's etc that have the same engine....

HPA will do a tuner for Cayenne or Touareg V6's.........probably 50k in costs.

http://www.trucktrend.com/roadtests/...reg/index.html