Has anyone removed the air conditioning system from the car and if so what is involved? I never run my A/C and from a simplicity standpoint and weight savings, I'd like to get rid of it. Anyone know the amount of weight saved by removing the compressor and associated hardware and any implication of loosing the the A/C which is used to power the fuel cooler on the TT/GT2? There is no fuel cooler on the GT3 or Cup cars, btw. Anyone know if the fuel cooler is actually operating when the A/C is turned off and is in fact really necessary? Any smart types wanna chime in? Kevin??

Thanks....

 

From memory the compressor and clutch is 16 lbs.. The aluminum piping front to rear is 12 to 14 lbs.. While these are nice savings and any reduction in the REAR of the car is a nice thing. For where you live and the higher temps cooling the fuel in the tank might TRUMP those savings. The fuel does get warm, and hotter fuel will detonate easier.

With that said, a better way would be to install the LARGER GT2 or 997GT3 fuel tanks and add he dual in tank fuel pumps!

 

Thanks Kevin. That's a total of 30lbs of weight which is substantial. Let me ask you this. I never operate with the A/C on which means the A/C compressor is de coupled and not circulating the freon. This would lead me to believe that the fuel cooler is not working either. In other words, the A/C must be selected on in order for the fuel cooler to operate. Is that not correct?

Secondly, do you have a dual pump set up that you sell for these cars? If not, what pumps do you recommend and do you have any info you could pass on regarding the modification? What is the benefit of the dual pumps? Redundancy or greater fuel pressure? I am assuming the dual pumps mounted in parallel?

You mention a larger fuel tank. What is the benefit of the larger fuel tank that would only add weight?? What would that do for me that the smaller tank doesn't? I never run the car on the track with less than 1/2 fuel on board and have not had any issues. I always start at 3/4 full and after 25 min of running end up with 1/2. Once you install at the larger tank, how do you go about calibrating the fuel sensor and the ECU regarding fuel levels after installing the larger fuel tank.

Your turbos and programming has been flawless so far. Thanks again Kevin.

 

No the A/C will kick on depending of the climate control and ECU. You can have the A/C off and it "may" cycle. Unless you disconnect the clutch wire.

The GT series or NON 4wd fuel tanks have a lower center of gravity. Think of it as a flat floor in the bottom of the tank. ALL turbo's have the dual sponson. Wasted space.. If you have 10 gallons in a GT tank, the fuel is lower to the pavement.. If you have 10 gallons in the 4wd tank, it's 8 to 10" higher. IF you fill the GT tank with more fuel, in theory you will still have the pyramid LC of gravity. More weight at the pavement.. Do this make sense? Yes, you gain a few more pound (30lbs) IF you desire to use a greater fuel payload>but placement trumps weight savings in this case.

Yes, you can mount the multiple fuel pumps. The twin factory setup is nice, plus a third pump.

 

Thanks Kevin! Interesting with the A/C turning on automatically. I've never detected that and it would certainly be obvious due to the additional LWFW. Next time I'm at the track I will monitor the temperature of the fuel cooler to see if it is working with the A/C off. If it's working, the cooler should be ice cold to the touch. Should be easy enough to check.

To add to that with my earlier question from above:

Do you have a dual pump set up that you sell for these cars? If not, what pumps do you recommend and do you have any info you could pass on regarding the modification? You say the twin factory set up is "nice", plus a third pump. Can you please expand on that? What is the benefit of the dual pumps? Redundancy or greater fuel pressure? I am assuming the dual pumps mounted in parallel?

So the benefit of the larger tank is a slightly lied CG due to getting rid of the 6" hump. Once you install the larger tank, how do you go about calibrating the fuel sensor and the ECU regarding fuel levels after installing the larger fuel tank.

Thx!

 

Stealer will recalibrate . I'm actually putting in the bigger gt3 ROW tank in my next car, 25gal.
John there is a few fuel options I'll let you know know when I have definite answers but I've been working on this for a while.

 

Very good. Keep me posted Adam... Thx!

 

I also want the 90L tank...997 twin-pump would also be a nice addition...

 

i'm a pleasure driver so i use my a/c - not blasphemous, just being honest

 

Looks like according to this document from PAG, A/C delete on a 997GT3RS is at least 15kg/33lbs:

...vielen Dank für Ihre E-Mail vom 03. September 2009 und Ihr damit verbundenes
Interesse an den Produkten unseres Hauses.

Nach Prüfung durch die
Fachabteilung möchten wir Ihnen mitteilen (after checking with the various in-house departments), dass wenn Sie Ihren Porsche
911 GT3 RS
so ausstatten, wie in Ihrer E-Mail beschrieben, Sie auf einen
Gewichtsvorteil von ca. 50 kg kommen (weight savings totalling 50 kg)
- Leichtbauscheinwerfer ca. 5kg, (lightweight lights)
- PCCB ca. 15 kg Ersparnis gegenüber Stahlbremse, (vs steel brake)
- Lithium-Ionen-Batterie ca.10 kg Ersparnis gegenüber einer
Bleibatterie
- ohne Klimaanlage ca. 15 kg Ersparnis, (A/C delete)
- ohne Radiosystem ca. 5 kg Ersparnis). (radio delete)

I would imagine it is comparable on our cars. That is a pretty substantial amount of weight to be lugging around without using it at all in my case. I have also come across a post where identical 996GT3s (one with A/C and one with factory A/C delete) and the difference was 61lbs as measured on identical scales (see post 17, 21, and 25 below):

https://rennlist.com/forums/997-gt2-...options-2.html

 

Would be nice to find someone that makes a "kit" one could retrofit on our cars...

 

^agreed. That said, when I do decide/need to replace my fuel pump, I will be updating to a 997 pump regardless...
http://www.6speedonline.com/forums/9...ml#post4208811

 

http://store.gsrautosport.com/gsrele...p/gsrpskit.htm
You should do this too while you're taking weight out

 

Interesting kit. I doubt it would take any weight out as you are replacing one pump with another. I'm also a bit hesitating about doing anything that would change the steering feel of the car. Finally, I've never heard of any overheating issues with the stock system on any TT/GT2/GT3s... Looks like a nice kit though...

 

It might be worth looking into simply for the fact that it takes strain off the motor with the silly pulley but then how much electrical strain is put on the system. If you're going ***** deep might as well call them and ask for a name of a customer/s who has done it and get feed back.