Gizmo's Daily Driver Build

You.Have.No.Idea
To quote an ethanol axiom: "Ethanol: it's a helluva drug."

 

You know you want it @Gizmo let me fuel that influence

 

I mentioned to the wife about doing e50/50 mix of fuel... she stop me mid sentence and said "there no way in hell am mixing fuels". She had the look of not gonna happen on her face..... so for now its out of the question. Will see what next summer has to offer

 

Sounds like she needs to be restricted from the Speed

 

Haha or we trade her mazdas 2 in for another speed and she can have that one. But i can't restrict her from it she likes to drive it to much. She addicted to intake noise she tells me

 

Tell her ethanol makes much more fun intake noises due to a great deal extra POWAAAAA!!!!!

 

Haha, you guys are funny!
I'm really happy to hear you are enjoying the tune! I should throw out another option of adding methanol injection. You can get similar power increases to an e-mix, AND the wife would not have to mix fuels.

 

Or do both, like me
E28 + 100% methanol from a CM10 FTW (and extra safety margin/clean valves/cooler BATs year-round)!!!

Joking aside, a CM7 (or equivalent, becuz K04) spraying 50/50 WMI will probably get you a good deal more performance and not have the flammability concerns of 100%. Jason would know much better than me how far that would let you push timing.

 

Jason has a point

 

I vote WMI and safety device incase the system acts up, or leaks like mine.

 

What safety devices do you recommend?

 

I have an old Snow Performance kit. i havent had any issues except for the half ass install from the previous owner.

 

problem with meth kits, a good one runs $600+, now convert that Canadian $796.05 +HST13% + shipping which is going to be another $100ish, the shit get expensive fast for us canucks, and having to find a source of meth that is not over overpriced is whole another boat

 

Dang. I was super-meticulous with my Cooling Mist kit, but when I had a pump go bad, it caused all sorts of other gremlins. Long story short: I ended up re-wiring and making everything better the second time around. It took a while, but was worth it. Chasing down electrical issues is no fun at all! Thankfully, they were just limited to my WMI system, and not the car itself. I detailed everything in here:

http://mazdaspeeds.org/index.php?threads/bnr-s3-methanol-awesomeness-i-hope.931/

 

It's pretty cheap at Canadian tire

 

you can get the simple Cooling Mist stage 1 kit... its like 220 US.... I use it for cooling.. and to help keep knock away... its a pretty simple kit.. but for a stock turbo car... E85 should be fine..

 

I have the CM Stage 1 Deluxe on my BNR S3'd setup spraying 100% methanol with a CM10 from 15+psi. It works perfectly. But I also have O/L Genpu fuel trims, which helps. Regardless, zero issues at all.

When I build/go EFR7163, I'll get a progressive controller and spray ~17.5-20 GPH, most likely.

 

Yeah I'm S4 with an ETS tmic so I have to have meth I'm starting at like 8 psi with a cm7 nozzle... I'm thinking about switching to two cm5s for better atomization which should give me better cooking... but winter is almost here so that wouldn't happen until the spring


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TL;DR incoming wall of practical experience and napkin math that I've verified with logs:

FWIH, with progressive controllers, a great initial set point is for it to start spraying at 50% of your peak boost, and have it ramp up to full spray at 75% of your peak boost. Obviously, you can coordinate with your tuner to fine-tune from there. But on my ethanol map, I see 24.5-25psi, so I just have it start spraying (which is full amount, not ramp-up, since it's a boost switch instead of progressive controller) at 15psi, which is 60% of my max boost level. My boost ramps up so quickly on the BNR that the fact that it takes a brief moment to start spraying full-on means that it's a pretty much perfect set point and usually "hits" at about 70% or so of my max boost.

15psi is also good because I basically never hit that boost pressure unless I really mean business, so my methanol lasts a lot longer. Justin was able to get it dialed in very easily, but we had to scale down my MAF because I'm adding enough extra fuel with my CM10 that it goes beyond the +/-10% O/L fuel trims Genpu's can adjust for. Our direct injectors are ~850 cc/min. My CM10, ironically, flows 12.8 GPH (you'd think the "10" refers to GPH; it doesn't), which when doing the math, it's like I have an extra 800cc injector. This means my injector headroom is increased ~24% (from a simple perspective; I realize it's a different type of fuel with different properties/energy potential/volume, but that gets me in the neighborhood). That extra 24% takes me way beyond Genpu's O/L fuel trim adjustment ability window, even with E28 in the tank. And my IDCs dropping has been pretty consistent with this napkin math.

The short of it is that I lose ~15% injector headroom running E28. With the CM10, I gain ~25% injector headroom. So when it's all netted out, I effectively have ~10% greater injector headroom when spraying 100% methanol on my CM10, even with E28 in the tank. IMHO, it's the perfect nozzle size/methanol concentration for BNR S3's and other turbos of similar size that are shooting to be tuned for in the 380-420whp range.

 

Yeah I have a switch also.. do you have a top mount? My simple minded thinking was that the quicker I started spraying meth the cooler my bats would be. Pre meth, my bats would end up around 145 after a 4 gear log..... but yes the bnr spoils up so fast there probably isn't a difference between 15 and 8 psi... thanks for the info...


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