pepinozaur

I am considering an as OEM as possible meth injection system for my 991.2TTS, using Aquamist pump(like gt2rs clubsport) and replicating somehow the injection logic of the 2rs (will refine by logs).
Seems everything should work fine, but can not find the P/N of the OEM GT2RS WATER SPRAY TANK from the frunk, any ideas? I wouldnt like to use and aftermarket tank

Kevin

You don't need the Aquamist pump. The GT2RS sprays the outside of the IC cores. It is a mister vs internal meth/H2O injection system. Manthey added a second 8,5 liter container to stock system that allows the water to match the fuel cell "run" capacity.

pepinozaur

Thank you Kevin, please let me be more specific, I want to spray inside the intake like a regular WMI system, not like GT2RS OEM. I dont understand how can be done without a pump.

Going to use aquamist pump, injectors, shielded lines and controller. The controller will inject more or less based on gt2rs logic, thats not very far from a "regular" meth kit.
I would like to use the OEM gt2rs tank as looks so good instead of any other 3rd party tank.

Manthey secondary tank isnt in my plans for now, as doesnt look too good and also I guess can do some tricks to have the 5liter tank last long enough. I will use water-meth just for cooling, so no more ignition advance or boost added from a regular stage2 tune, that means I can inject pretty late and less compared to regular injection strategies.

I dont know now by heart the gt2rs inject conditions but they were close to:
- Engine speed over 3000rpms
- TPS over xx%
- IAT over XX degrees C

So maybe can inject based on IDC (mostly,maybe like 80%) and BOOST(20%) and replicate quite well the conditions above, of course I will not take IAT into consideration, even though an external condition can be added to aquamist controller.

pr-s

Hi guys, Do you know if anyone with a Turbo or Turbo S has donde something similar from the GT2RS. I know they've done Meth Injection (my Turbo S has it) but I'm speaking about intercooler spraying like on the GT2 RS done to a Turbo or Turbo S? Is there an aftermarket kit or an OEM one?

Happy holidays!!

BOOSTED TTS

Subscribed.

kouzman

subscribed too! I am curious too and this setup is definitely on my to do list.

nolimits

Listening also ! There is money to be made here somewhere by one of our vendors

Kevin

The above posted pictures are from the Mitsubishi EVO
We can use the factory 991TT Windshield reservoir and pump assy .
The simple control system would require a Hobbs pressure switch set to 8 psi of boost pressure. This is a number that I have tested. If you set it at 6psi the water consumption doubles.
Having the ability to use a rocker switch to manually spray will waiting on the tarmac can drop your IAT.
The picture below is of a 991GT2RS rear intercoolers (aftermarket IC's fitted) with the stock external cooling loop

pepinozaur

Kevin this is really good stuff, keep those coming.

This simple system can be indeed an alternative for the meth kit, mostly for those of us who want to keep the system to spray only the ICs and not directly into the intake, I wouldn't mind that if getting pretty good results. That would mean to try to use as much distilled water as possible into the watertank to avoid clogging the injectors as Porsche recommends.

I have used the windshield tank on my 996tt mixed with Aquamist, and having for free the dash water level indicator was a nice "feature"

Jean

Page 115-116 some information of the GT2RS setup
https://drive.google.com/open?id=11A...4gZoWHwq4fjMeA

pepinozaur

Good finding, I will ask for pricing and availability tomorrow at my local dealer

Jean

The reservoir is around $2,500 USD

Kevin

Thanks Jean!
Here are the part numbers and prices I had heard that the Reservoir was over $2500 with cap and bracket.

9P3 805 386 A $2,347.57 Reservoir https://www.sonnenporscheoemparts.co...oir-9p3805386a
1K5 955 651 $50.89 Pump
9P3 115 531 $89.22 Spray Nozzle 4 each needed

Again the windshield reservoir will work. I think it's 8.0mm EPDM rubber tubing

Jean

Kevin's solution is just as effective and much cheaper. If you definitely want to upgrade to GT2RS parts I would also get a pair of GT2RS intercoolers with their shrouds and ducts..The whole lot for another $3,000 or so. I would jump on the ICs now before they double in price when people start upgrading!

Kevin

Jean, did you install the GT2RS IC's?? Can you publish any of your logs?