35 replies to this topic

[lookforjoe]

This is how I wired mine



Bypassed the pulse relay, so it will come on full blast @ 18psi. Found that I had leaks at a couple of the quick-connects, so I replaced then with 1/4 brass compression couplings today. Hopefully the rain will let up during the week so I can actually try it out safely.

[project_850]

I have a quick question. Specifically for people that are running methanol injection and a blow off valve. Do you find that the blow-off valve spits out the intake charge and a whole bunch of water every time you get off the throttle past whatever psi you've set it to? If you're recirculating, does the water push back past the MAF at throttle let off??

[URO_S60]

project_850, on 27 December 2011 - 04:24 AM, said:

I have a quick question. Specifically for people that are running methanol injection and a blow off valve. Do you find that the blow-off valve spits out the intake charge and a whole bunch of water every time you get off the throttle past whatever psi you've set it to? If you're recirculating, does the water push back past the MAF at throttle let off??

You spray right before the TB which should way past any BOV (atmospheric or not), the only way there could be a purge of the WM would be if you spray it right before the BOV which wouldn't make much sense now would it.

[Gideon35T]

Well, there's mixed opinions on optimum location for a BOV. Many 1/4 mile turbo cars run then immediately before the throttle body while many other run them almost at the turbo. I have my BOV on the hotside and therefor wouldn't have an issue with a TB mounted wmi nozzle.
Now, if for whatever reason someone is running a recirc BOV and the nozzle is before it then there's a worry. There's been many reports of damage to the turbine wheel with preturbo wmi sprayed setups (yeah, some people do that - and even AEM approves of it) and a recirc would with a pre nozzle would toss some of the liquid into the turbo creating the same issue.
For the majority of us though that shouldnt be a problem. I plan on adding wmi to the S60 as the Arizona heat can be a real pain.
The biggest issue I see with wmi setups is that alot of people dont run a check valve. So fluid is leaked into the intake system when under vacuum. And, as it's not under pump pressure, the fluid isnt atomized properly.

[project_850]

If you looked at Hussein's setup, his BOV is right before the throttle body. IIRC he's got a Perrin recirculating BOV, which means when the throttle plate closes the intake charge is then purged back towards the MAF, which would include any residual water injection that's been atomized in there. I'm just wondering if there are any potential issues that might arise out of that, or if there are none.



My BOV is also right by the throttle body, and coincidentally that is also where my water injection nozzle is.

[lookforjoe]

My Greddy purges POST MAF.

You can see the WI nozzle in the bend before the BOV flange, and the BOV dump runs back post MAF, before the elbow going into the "J" pipe. I use a Poweraire soleniod, which will not bleed any fluid under vacuum. I also have a Aquamist check valve in the line pre-solenoid, but the purpose of that is to prevent bleed back to the tank.



I'm still not using my WI, I haven't got any proper WI fluid, and the WW solv doesn't work for me, it seems

[project_850]

Ok cool. My nozzle is closer to the throttle body than my BOV. My understanding is that recirculating the intake charge purges it back OUT past the MAF and that's how the ECU readjusts fuel, so I was wondering if the recirculated intake charge with atomized methanol mix would be an issue for the MAF--but I guess since you haven't been running WI you can't give me a definitive answer?

I guess I can only find out once I start running WI again in earnest. I haven't run boost juice since I changed from iPD's HD CBV to a BOV and had to rework the pipe from the intercooler to the throttle body ..no issues using Aquamist at that time, but I've just purchased the Snow Performance kit with a much larger reservoir and was just wondering if there was anything to worry about.

[Gideon35T]

Recirc puts the air between the maf and the turbine. No readjusting is done or needed because that air has already been metered for. That's the whole point of the recirc setup. Even if there's fluid in the recirc air it wouldnt do anything to the maf because that air doesnt go through the maf. The issue I refereed to was about fluid hitting the turbine fan blades. The maf isn't even in the discussion of what we're talking about. And what does a larger reservoir have to do with anything???

- You said "If you're recirculating, does the water push back past the MAF at throttle let off??" ... the answer is "NO" because that's not how a recirc works.
- I stated that if you have a nozzle PRE recirc bov it MAY make an issue ... but only because you dont want droplets hitting your turbine wheel.

[JWL]

fluid on a maf is a bad idea. Try to get it routed so that this won't happen. Map sensor is fine. Been running it untuned on my little engine for several years, preturbo and post turbo. Will be the first mod to my next vehicle. Wondering why I can't find much about people running them here. Make a great mod, even without a tune.

[lookforjoe]

^ please read more than the last post - no one here is running WMI pre MAF

[JWL]

I was referring to the recirculating of water/meth to the MAF

[lookforjoe]

JWL, on 28 December 2011 - 03:39 AM, said:

I was referring to the recirculating of water/meth to the MAF

Right - but no one is doing that. Those on here using recirc dump post MAF, it's the only way to deal with metered air. Dumping it pre MAF would make no sense at all.

[Gideon35T]

lookforjoe, on 28 December 2011 - 03:48 AM, said:

Right - but no one is doing that. Those on here using recirc dump post MAF, it's the only way to deal with metered air. Dumping it pre MAF would make no sense at all.

Ding ding ding!

Come on people! Actually LOOK/READ the info so you don't make stupid responses. The entire point of a recirc is to dump BEHIND the maf since the air is already metered for. How many times can it be restated before you guys start to notice.
Listen to lookforjoe. If you doubt his experience then just look up his build.

[project_850]

Gideon35T, on 28 December 2011 - 01:52 AM, said:

Recirc puts the air between the maf and the turbine. No readjusting is done or needed because that air has already been metered for. That's the whole point of the recirc setup. Even if there's fluid in the recirc air it wouldnt do anything to the maf because that air doesnt go through the maf. The issue I refereed to was about fluid hitting the turbine fan blades. The maf isn't even in the discussion of what we're talking about. And what does a larger reservoir have to do with anything???

- You said "If you're recirculating, does the water push back past the MAF at throttle let off??" ... the answer is "NO" because that's not how a recirc works.
- I stated that if you have a nozzle PRE recirc bov it MAY make an issue ... but only because you dont want droplets hitting your turbine wheel.

The larger reservoir doesn't have anything to do with my question. I just said that I changed from Aquamist to Snow Performance with a larger reservoir and was redoing my intercooler to throttle body pipe, with the BOV 3" before the throttle plate and the WI nozzle about 1" away. I misunderstood the concept of recirculation and realize now that the recirculated airgoes back into the turbine side of the turbo, NOT purged going backwards past the MAF. Call me uninformed, but now I know better.

I apologize for the confusion.

[JWL]

Gideon35T, on 28 December 2011 - 04:06 AM, said:

Ding ding ding!

Come on people! Actually LOOK/READ the info so you don't make stupid responses. The entire point of a recirc is to dump BEHIND the maf since the air is already metered for. How many times can it be restated before you guys start to notice.
Listen to lookforjoe. If you doubt his experience then just look up his build.

I don't really care where the air is dumped, I simply mentioned that the MAF is not going to take meth on it. On a tangent, I wondering if ARD will be able to get a PWM signal or a twin tune setup. Would definitely make running water injection, and getting more power from it easier. Trip a failsafe, change maps.

[Fishey]

get a bigger turbo then ask me about meth injection.