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[ideola]

Thanks for sharing, Cedric, good stuff!

[Carrera RSR]

Hey Dan, any feedback on this water injection kit in use? Its been a while since fitting so we're all still here eating popcorn waiting for the film to start
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1980 931 - forged pistons, Piper cam, K27/26 3257 6.10 hybrid turbo, 951 FMIC, custom intake, Mittelmotor dizzy & cam pulley, H&S exhaust, GAZ Gold, Fuch'ed, Quaife
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[Cedric]

quote ideola:

"On the 941, I am running up to 15 psi of boost with no audible knock, and that is with 8.7:1 CR pistons, and the S1 ignition setup. I think 20-30 HP should be absolutely no problem, and probably quite a bit more. "

at 15 psi a bit over 200hp should be easy to reach. Even though water will delay/prolonge combustion, which will lower power a bit. Mappable ignition would probably be the thing to have to fully use water-meth injection, which I think is in the pipeline ideola.

More detailed results would be interesting, have had a lot of expenses myself so the car upgrades has been delayed for a while, so I cant buy a kit to find out myself. At least not until winter..

BTW, saab had it as an OEM option, raising the power from 145 to around 170 in combination with raised boost. And that was quite a crude system, pre compressor low pressure injection. Its not magic
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1980 924 Turbo
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[ideola]

I've dialed the boost back to 12PSI on the 941 just to be safe, particularly during these hot summer days. My long term plan is to install a knock sensor and programmable ignition, but that is not going to happen this season.

In the meantime, I continue to be very pleased with the affects of the water/meth kit. Combined with the in-cockpit boost controller and the associated boost increase, it really transforms the car. The difference between 6PSI and 10PSI is notable, and 12PSI provides near-937 performance (based on the butt-dyno).

I still have aspirations of getting all of the cars to the dyno this season, but if it happens it won't be until later this fall. So until then, I won't have any quantitative results to back up my impressions.

All that aside, for the money and effort spent on this setup (compared to the 937 and the Club Sport), I have absolutely no reservation stating that the $100 boost controller and $400 boost cooler setup is by far the biggest bang-for-the-buck enhancement for an otherwise stock 931.
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erstwhile owner of just about every 924 variant ever made