Lets Talk Water Meth Injection

[jet_r31]

http://www.rx7club.c...7/#post10978353

Not a bad little test pre-turbo vs inlet

cheers

darren

Edited July 28, 2012 by jet_r31

[Don Dada]

What you guys think of this as a fail safe device? Seems pretty nifty to me, and can work with any wmi kit.

http://www.aemelectronics.com/water-methanol-failsafe-device-1-4-sae-1184

[DVS JEZ]

http://www.rx7club.c...7/#post10978353

Not a bad little test pre-turbo vs inlet

cheers

darren

Do u think its possible that the boost was different during the 2 runs?

[JustinP]

What you guys think of this as a fail safe device? Seems pretty nifty to me, and can work with any wmi kit.

http://www.aemelectr...ce-1-4-sae-1184

hmmm I might look more into this. I was just about to order a Snow Performance SafeInjection kit for my WMI setup, but maybe this would be better.

[GTScotT]

hmmm I might look more into this. I was just about to order a Snow Performance SafeInjection kit for my WMI setup, but maybe this would be better.

I will be selling my Snow stage 2 kit soon, has a warning light and boost reference control. Its brand new, so PM me an offer if you want mate.

[JustinP]

I will be selling my Snow stage 2 kit soon, has a warning light and boost reference control. Its brand new, so PM me an offer if you want mate.

Thanks for the offer, but I already have a new Snow stage 3 kit ready to go in the car when I finish putting that together

[GTScotT]

schweet.

if anyone else is keen just drop me a PM

[Cowboy1600]

How many monies you want?

[GTScotT]

Heres the kit:

http://www.ebay.com.au/itm/Snow-Performance-20010-Water-Injection-System-Stage-2-/390477290989?pt=Motors_Car_Truck_Parts_Accessories&hash=item5aea429ded#ht_1521wt_1133

Thats the same seller I used, same price I paid.

I opened the box, admired the quality, threw out a useless cardboard divider and shelfed it anticipating my build.

Then things happened and I went a different way with my build that doesnt warrant WMI, so its just taking up space.

PM me a sensible offer and I'll have it in the post on Sat'dy morning. Hows that for impulse?

[jet_r31]

http://autospeed.com/cms/title_Motor-Speed-Control-Module-Part-3-Water-Injection/A_1539/article.html

anyone tried one of these yet?

cheers

darren

[blk94r33]

My d.i.y. fuel proportional kit is up and running for the bargain basement price of $330. Tune is next Friday will update here with how things go.

[Manuel Kasko]

My d.i.y. fuel proportional kit is up and running for the bargain basement price of $330. Tune is next Friday will update here with how things go.

More info the this kit

[blk94r33]

More info the this kit

find out if it works first then details will be posted....

[MagicMikeZ32]

I use the snow stage 2 kit. I have nistune tuned for 17psi without water injection. This is my low boost setting. I run a smidge under 20psi on high boost with water injection, same tune, no knock.

Looking at getting a safeguard of some sort, but for the time being, when I do mountains or after a bit of boosting I switch back to low boost until I can check the water level in the tank. I only have the small snow res, located behind the glovebox. I am always topping it up, paranoid about another grenaded engine lol

[GTScotT]

LOL NICE.

Good to know the kit works well without retuning.

Any indication of power increase with the highboost setting?

[MagicMikeZ32]

Not the same gains as a proper tune with water (timing increase and prob more boost), but def noticable. I'd say at least a conservative 20seat-of-pants hp, but I expect more than that. Don't want to make outlandish claims with nothing to back it up tho.

[GTScotT]

Thats fair enough. I will be doing a WMI kit soon but not on my own car. I'll update results, might just do it your way and see what the extra boost has to offer.

[blk94r33]

Tune completed!

Red line is the stock ECU with an SAFC

Green line is the Nistune Z32 ECU re-tuned for ~9.5 psi

Orange line is the current tune with the WMI on and some minor adjustments.

Although there isn't a massive gain in power, the tune doesn't rely solely on the WMI to make power, if the WMI does fail, it will leave the tune close to the edge, but not mean an instantly lunched engine. Had a bit of trouble initially as the nozzle is simply too large for the power the cars making, after dropping the pump pressure down a bit it netted worth-while results.

The good bits:

-Big drop in intake temps, run after run, everything down-stream of the nozzle right up to the head wasn't just ambient temperature but physically COLD to touch.

-Big drop in coolant temps (and assume exhaust temps) car ran in the 85-90 degree mark and would warm slightly after each run, with the WMI turned on, the temp dropped back down to the 80 degree mark and held there.

-Boost holds better in the top end

-Mid range power and torque are both improved, peak power and torque are a touch higher.

How does the kit work? Well, after a bit of research I wanted to try WMI, but didn't like the 4 figure price tag of the Aquamist system, yet could see flaws in the on/off systems.

I ended up buying a cooling mist "stage one" on/off system, and experimented by modifying it my own way.

In brief, the hobbs switch activates a mechanical relay, that then sends power to a solid state relay, this relay is run off an injector earth, so that once pre-set boost pressure is reached the pump runs at the same duty cycle as the injectors. Having two relays does mean an extra point of failure, but also means if the hobbs switch, mechanical relay or solid state relay fail in the closed postion, I don't end up with 4 litres of water in the engine.

It's far from perfect, and does run a tad too much in some spots and not enough in others, but for $330, ($300 kit, $15 relay and $15 for conduit and other stuff) the gains are definitely worth while, and it's a step up from an on-off system.

The down-side being there isn't a fail-safe if the kit fails, so the tune was kept conservative to keep the engine in-tact if something does go wrong. A smaller nozzle with higher pump pressure would have performed better but this still works well.

Thanks to scotty nm35 for discussion about the SSR operation. And a big thanks and +1 to Cat and Trent at Chequered Tuning, exceptional to deal with from the beginning and very pleased with the entire tune!

[Manuel Kasko]

So you spent $300 + a tune to get pretty much exactly the same power?!

Doesn't make sense at all

[blk94r33]

There could be more power made, but at the compromise of safety. The main point of the kit was to improve reliability of the whole setup.