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-   -   Water/Meth injection (http://www.the370z.com/forced-induction/21806-water-meth-injection.html)

Jordo! 07-12-2010 07:35 PM

Quote:

Originally Posted by LateralG'z (Post 619962)
I don't know either? It is really hot here in Ok & TX and in three weeks I will going back to the track. I will see how the car handles the heat. If my 1/3 mix race fuel/ 91 doesn't cut it, i will probably consider this. Plus race fuel is really expensive. Long term could be much cheaper.

For what you'll spend on the kit and methanol to mix wit hdistilled water, if it's just for track days, I'd say just fill up with 100 octane on those days.

Guys, go back and re-read my last post on W/M and also click on the link I posted -- there's a lot to learn if you want to experiemnt with it. You can't just slap it on and call it a day.

LateralG'z 07-12-2010 08:29 PM

Will do, thanks

Chris@FsP 07-12-2010 09:03 PM

There's no replacement for octane! :D

Just run a slightly richer tune and higher octane fuel, and you will be just as well off as a with a complicated W/M system.

LateralG'z 07-12-2010 09:10 PM

Chris, We will have to do some data logging at the track. It will be interesting now that the car will be supercharged and it fricken hot out

Chris@FsP 07-12-2010 09:11 PM

Quote:

Originally Posted by LateralG'z (Post 620162)
Chris, We will have to do some data logging at the track. It will be interesting now that the car will be supercharged and it fricken hot out

We've already addressed oil temps, now we need to work on the cooling system!

LateralG'z 07-12-2010 09:14 PM

:iagree:

OKC370Z 07-12-2010 09:37 PM

Quote:

Originally Posted by Jordo! (Post 618102)
I have a lot of experience with W/M inejction...

WarmandSci is correct, unless you are adding boost or timing, you will most likely lose rather than gain power, or at best break even. Although it will cool the charge, the water volume displaces both air and fuel (somewhat compensated by the concentration of methanol).

The major advantage of W/M is to quench detonation -- if you aren't detonating, you are unlikely to make any gains.

Or... if you wanted to run straight methanol, given the amount of extra fuel you burn for each lb of air, you'd make some extra power, but this would require completely revamping the fuel system and a major retune as well... stoich is 6.5:1 with meth. Also, really corrosive and toxic. And expensive.

Not worth it N/A... not always worth it even when boosted. And if you were to go that route, I'd recommend a direct port system anyway...

Yes, they are correct. Water/Meth injection really should be reserved for race applications. it is not easy to tune with this sytem and if you go to use for cooling effect only you will find youself down on power. Not worth the money.'

You already have the the oil cooler so you should be good to go. If your at the track dump ice in your inter cooler between sessions. Otherwise on the street it will opeate well with reasonable temps.

LateralG'z 07-12-2010 09:50 PM

car is pretty much a track and it will eventually be a complete car, gutted and caged. Plan to boost hard so just exploring ideas I have seen to help with engine heat

Jordo! 07-13-2010 03:47 AM

Quote:

Originally Posted by LateralG'z (Post 620299)
car is pretty much a track and it will eventually be a complete car, gutted and caged. Plan to boost hard so just exploring ideas I have seen to help with engine heat

Dial everything else in first. Honestly, if everything is tuned to the limit, there may be no more power to be made.

Before I had an intercooler on my supercharged 2ZZ, I picked up 15 whp with W/M direct port injection -- but I was overdriving the blower and had no IC, so I desperately needed some cooling at that point! Moroever, the ECU was pulling some timing. The W/M fixed all of that.

I had a nice coolingmist progressive controller with a W/M injector ported into each intake runner -- worked great!

However, after I had an A2W IC installed, the W/M made absolutely NO DIFFERENCE in power. We experimented for an hour with the tune on the dyno, and it just diidn't matter -- timing was optimal, and adding timing yielded no extra torque. I would have uninstalled it and sold it off a that point, but it was too much of a PITA, so I left it on as a safety measure as it wasn't hurting anything :rolleyes:

If you were non-intercooled, I'd be more of an advocate for it. If you are intercooled, you probably won't need it.

In fact, I'd say the time and money would be better spent upgrading your IC components -- is it A2A or A2W (I recommend the latter, although the former can work well too)? If A2W, you could upgrade the pump or add another heat exchanger to further cool things down -- or as one person noted, you can get a larger reservior and pack it with ice for track days!

Also, what kind of track are we talking about? Road course, drag strip, autocross???

Kyle@STILLEN 07-13-2010 11:30 AM

Does Oklahoma have access to 93 octane? What oil cooler are you using?

Since Chris is going to be doing the tuning for you, you might consider having two maps, one on pump gas for the street, and one a bit more aggressive but with 100 octane for the track...You could take advantage of the UPrev multiple map features and just change out the map when you're at the track. This is something that we've talked about but for various reasons we aren't able to offer the CARB legal, warrantied kit as an adjustable kit.

Chris@FsP 07-13-2010 11:52 AM

Quote:

Originally Posted by Kyle@STILLEN (Post 621077)
Does Oklahoma have access to 93 octane? What oil cooler are you using?

Nope, we have the same craptastic 91 that you guys do. We had 93 up until around 2006 though.

We do have a few stations that carry E85 though :)

Jordo! 07-13-2010 11:58 AM

Quote:

Originally Posted by Kyle@STILLEN (Post 621077)
Does Oklahoma have access to 93 octane? What oil cooler are you using?

Since Chris is going to be doing the tuning for you, you might consider having two maps, one on pump gas for the street, and one a bit more aggressive but with 100 octane for the track...You could take advantage of the UPrev multiple map features and just change out the map when you're at the track.

:iagree: :iagree: :iagree: :iagree: :iagree:

You guys have an A2W kit, right? How efficient is the current set-up? What are post charge temps looking like?

The OP should definitely have an air-temp guage installed, ideally pre and post charge, but even just post would be incredibly informative.

Kastley85891 07-13-2010 02:14 PM

Not worth it on a Z with FI unless you intend to use high boost , lots of timing, which generally the 'average' end user here will not do.
Having said that I would go with an aquamist kit if buying one.

I have asked it before but still have not seen on this forum, does anyone have any EGT data from a boosted Z?

Personally like my sig, E85 would be a better option then a meth kit for thoose wanting big boost and aggressive timing, but both have there limiting factors and pros/cons.

Kyle@STILLEN 07-13-2010 03:15 PM

Quote:

Originally Posted by Chris@FsP (Post 621119)
Nope, we have the same craptastic 91 that you guys do. We had 93 up until around 2006 though.

We do have a few stations that carry E85 though :)

I hate 91 octane with a passion! It's amazing how crappy it really is.

Question for those people in Florida and other parts of the country that get 93...What is the cost of the 93 octane in your areas?

Does anyone know why CA is limited to 91?

Quote:

Originally Posted by Jordo! (Post 621129)
:iagree: :iagree: :iagree: :iagree: :iagree:

You guys have an A2W kit, right? How efficient is the current set-up? What are post charge temps looking like?

The OP should definitely have an air-temp guage installed, ideally pre and post charge, but even just post would be incredibly informative.

We have found that the air to water intercooler is EXTREMELY efficient. As you can imagine dyno pulls put a lot of heat into the system and one of the quickest and simplest examples of an efficient intercooler is how long it takes for the car to cool back down after a hard pull. For example, we have been doing a lot of supercharger installs and custom tuning with the new Camaro's. Those cars are TERRIBLE on heat soak. We will do a pull, then have time to actually get out of the car, walk to the computer, get back in the car, keep on waiting...It's insane before the temperature actually comes back down. With our 370Z and G37 we can do pull after pull after pull with very little down time between runs.

Also, during our development we did insert temperature probes post blower and post intercooler (in some of the prototype/testing photos you will see the yellow wires.) We saw decreases in temperature of well over 100 degrees and at idle the IAT's were within a couple degrees of ambient if I remember correctly.

LateralG'z 07-13-2010 06:39 PM

If stillen still plans to offer pulley options for more power. I know myself and will eventually get that larger horse power pulley. With all that added heat, the oklahoma heat, black car, hot tarmack. I am sure I will need to upgrade the raidator/A2W intercooler to make the heat is being handled. I plan to add a vented hood help with air flow through the engine bay. I am just trying to get a feel since I have seen it and they said they like and it works great. my car mostly drives on the track. It is not a DD and will never be one. I appreciate all your guys input and opinions on this topic. thanks


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