E85 with a Stillen supercharger?
 

Anyone tried E85 with a Stillen supercharger? If so how did it do? My tuner has been wanting to do a E85 tune on my car and I'm thinking we may do it after the CJM fuel system goes in the car. I tried to search for it but didn't find anything.

You would be the first known one on the forum. I would inquire with stillen maybe if they have done an in house one also possibly.
DMhenderson has a GTM kit and is finishing up an e85 tune on his GTM SC kit currently but still waiting on final results.

You would, I haven't seen that yet :)

Would you be putting a smaller pulley on to take advantage of the E85? If you can't run more boost I'm not sure how much more you'll get out of it. Do you have enough headroom in your injectors and fuel system?

From what DM has shown the injectors & pump have to get bumped up. I would imagine that increase in HP will be minor, say from 400 to 420 at most, will allow a little extra timing and push everything a bit farther. Squeeze out that last little bit of power.

Then again, I could be wrong and e85 might be an amazing addition to our SC systems and add an additional 50HP by just switching fuels.

I don't think you're going to be wrong. My wild *** guess is that the best part of it for SC, particularly for Stillen guys, is the fact that it burns much cooler. And it would provide a little extra safety margin.

This is mainly my reason for trying it. My injectors are in the 80s so I may not have enough, does E85 take a lot more fuel? I do plan on upgrading the pulley but I'm going to wait for it to come with the upgrade kit from Stillen.

Totally second this. :iagree: I used E85 on my 350z stillen, roots blower style, for the sole purpose of the cooling affect, and the little timing advance. If you know anything about that roots stillen setup, people were always crying for more power and we were trying to do anything we could to dig for the extra few ponies. It always fell on its face after 5,200 rpms because it started blowing so hot when we had it maxed out. Not sure of the temps of the centrifugal style stillen on the 370. I have a air temp sensor for sale! :rolleyes:

I would say you could get more. How much is the pioneer work you need to do. I think it would be a noticeable gain. But cost per dollar might not be as keen.

You will absolutely need larger injectors or your motor will run lean and....boom.

I have some ID1000's for sale. :rolleyes: Lol.

My car is also the fist CJM fuel system Punk has built for a Stillen supercharger:tup:

Oh yeah. If you're even in the neighborhood of maxing out your injectors, budget new ones into the plan. You need what, 30% more E85 than pump gas?

Sweet! Then just drop in some larger injectors and you will be set! What size are you running right now?

30% seems to be the standard. But I was running 1000's on E with 500+to the wheels without a return system.

I believe they are 750s. I guess if I need to change the injectors I will most likely wait for the Stillen upgrade kit and do it all at the same time. I was hoping to get away from my Aquamist HFS-3 that has been a pain in the butt.

I seriously doubt 750s will work.

Then I wont try it with them! I will make sure I have enough injector before I try.

No way would those work..unless your going for 4xx.

Buy my injectors...$350 Need to be flow matched though.

E85 can be as much as 100hp over 93 Oct but as said before you need the fuel for it
I would say right fuel system , e85 and a little more boost 500+ can be had even on the stillen kit

I have the CJM road race fuel pump with the S1 fuel system on order so the fuel system is covered. When Stillens kit is ready I will add more boost and injectors and we will see if your right! Hopefully there is a good upgrade for the 7AT by then because I will probably need one if you are right!

Do you know what degree your timing currently is?

No I'm not sure what it is right now.


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When I converted to e85 I went with larger injectors, AAM return loop fueling system, adjustable fuel pressure regulator , all stainless.braided fuel lines and fuel cell and pumps designed for e85. Don't underestimate the corrosive nature of e85. I don't think much of OEM fueling system is up to rigors of pumping e85.

My car now makes well over 400 wHP in naturally aspirated form running pump e85.

Not only do you want larger injectors but ones rated to run e85. I used 725cc on my NA motor.

Everything in the 370z fuel system is fine with E85.

For any boosted 370z on e85: 1000cc injectors!

have you tested this? The pump injectors and line are all fine? So all you would have to do is tune for e85 then? Oh and find as station to get it at?

No, he means that all the lines and such are compatible with E85. You still need injectors and pump.

Ah and tune of course. Is this even "worth" it WHP on a bolted car or just for FI. Thanx

I don't think you would need to upgrade the fuel pump. But you're right my point is that there is no problem with e85 compatibility. As for if your fuel system provides enough volume for it is another issue.

Edit nevermind I was thinking the stock injectors were 440cc but I believe they are actually like 310cc so injectors would be pretty much for certain, sorry.

Plus, as cheap and easy as it is to throw in a Walbro 255 at the bare minimum wouldn't it make sense to give yourself headroom?

All the Fast Intentions data is crammed into one really long thread so I cannot dig it up within the hour lol... but on one of their projects they checked to see if the stock fuel pump was up for a bit of horsepower and it kept up with as far as they bothered to push it before swapping it out precautionary.

I think the stock pump would probably keep up. Its at least something I would do only if it wasnt holding, rather than proactively. That is, on a NA car. A fuel pump is always running at 100% in the Z since there is no resistor pack or anything... so its not any extra wear on the pump to use it for all its got. I just wouldnt want to run it to the max on a boosted application since environmental conditions and boost variances will cause fuel demands to have a bit larger swing.

But there is certainly no harm in upgrading the pump anyway. I think I am going way off topic here mixing up 2 active threads on E85. This one here is supposed to be about a supercharged application I suppose.

Ive been working on converting my car to e85 for a while. Should be able to get it done by next summer. Have a few small issues i ran into on my car since installing my supercharger. But once i fix it i plan on doing e85 my tuner also wants to do this badly. Im going to get a return fuel system and im going to run a dual fuel pump setup. I already have both pumps and i have id1000's in the car already.

Yeah the stock injectors run out of fuel right around 350whp, for FI e85 I would say to go with a stealth or aem e85 pump minimum if you plan to be over 500hp the 255 in all the FI kits will be running hard on alcohol at that point.

Phunk is your entry return system (S0 or S1, can't remember the numbering off the top of my head) enough for a e85 return set up or would you recommend something more?

FYI...I wouldn't be looking at e85 for a ton more power but to give me safety on the 500-500whp I'd like to run.

im running automotive 485lph fuel pump, cjm stage 0 return fuel setup and 1000 id injectors

my only problem is i still have most of my water/meth kit still hooked up from when i had the stillen. and i am thinking should i just rewire the water/meth kit back in to work with the turbo or just remove it and go fuel e85 ( closes station is 20mins away):confused::confused:

Agreed, a big pump is a must for a boosted e85 370z. I was only thinking of all-motor use when I said I think a stock pump would be good-to-go for E85.

The S1 kit will do about 600rwhp Dynojet with E85 with the Aeromotive pump and 1000cc injectors (maybe more?) pending everything else. It can be a little different from car to car. The higher boost pressure you need to make your power, the earlier you will max-out the fuel system setup (this is due to pressure differentials and pumps reduced output at higher operating pressures)... also the more conservative your tuning is, same thing.

The 370z is super sensitive to this stuff as 1 psi can be 30-40hp and 1 degree of timing can be 20hp. So imagine that a guy running 2-3 degrees more timing can make a lot more power on the same fuel volume.

But until I swapped to my S2-SE fuel system a couple months back, I was running a one-off setup that was lesser than my S1 kit, and I made 586rwhp at 9psi E85, and used to run a little more boost on the street. So I know its good for it.

E85 with a Stillen supercharger?
 

You need at the bare minimum:
-1000cc injectors
-320+ lph fuel pump
-full fuel return system
-a talented tuner who will have to write your maps from scratch

It's a huge pita and probably not worth it for SC applications. Makes more sense for turbos but I'm super stubborn. If you want to see the pain I went through trying to get this done, check out my build thread.

For reference I am using:
AEM 320lph fuel pump
Injector Dynamics 1000cc injectors
CJMptorsports stage 1.0 fuel return system

My final tune will be 10/15 and will post my dyno sheet results. I am shooting for ~530whp or so.

Edit: Let me tell you about how fun it was to load up four 5 gallon containers with E85 and haul them to my tuner...

E85 with a Stillen supercharger?
 

Not if you're supercharged and you want dual maps for both E85 and pump gas it's not. My fuel pressure spiked to 71 psi on 93oct when the bigger fuel pump and injectors went in. Dremeling out the swirl her only dropped it to 68psi.

Edit: Phunk is probably right if you are ONLY going to run E85 but E85 stations are not all that common and you need to have a backup plan that doesn't involve a flatbed unless you get stranded (or you're building a dedicated track car)



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Yes the fuel pump module needs modification to support the large fuel pumps, or you get the idle pressure spike! I have the Walbro 400 in there and I have pressure under control (50 psi at idle).

haha Phunk, I had no idea that was your design! It was between the CJM kit and the AAM kit and my tuner had a lot of nice things to say about you guys.

I was all over the place at idle. Once you got the motor warmed up it got ~tolerable~ but not "safe". I upgraded just to end the headache. It took a meeting of the minds between Hill's, CJM and Z1 to come to the conclusion that my original assessment (before we started the build) that I needed a FRS was correct. Even a stopped clock is right twice a day right?

Other stuff from this thread as I am getting caught up:

You are correct. This is why I went down the E85 road. That and being a "special snowlflake"/first to do something weird and (maybe) unnecessary. I am not expecting a huge power bump. If that happens though, you guys will be the first to know.

Agree that this is unlikely. My 645cc injectors were nowhere near sufficient.

Ya it can take some messing around to get the idle pressure right with a big pump. But its unrelated to the return system mostly, as its a problem with how the fuel pump module re-purposes the return fuel to power a couple of restrictive venturis. But being that your car is boosted, I would have done/recommended the return system for the sake of fuel volume on top. With E85, you would be pushing it and most likely see pressure drop near redline.