50/50 e85 clear death??
 

If there is thread on here about clear death, I apologize. Didn't see it. And sorry no pics.

I noticed on my last data log when hitting 22psi @ 4500 rpms my fuel pressure dropping out. It would drop down to high 1200's and low 1300's.
We opened up my fuel pump and looked inside....spotless. We opened my spill valve....spotless.
We tried to take out the piston (which should slide out freely) but couldnt. That shit wouldn't budge.
We had to put it in a vice and use vice scrips to finally budge it. Got it out finally. We have Clear death, no color but sticky as shit.
Investigated everything to find out all the shit was sticky. Cleaned everything and put all back together. Gonna run a log to check flow. I will update.

That's the sticky death. The film should actually be slightly yellowish. Use lighter fluid / naphtha to clean, and list what oil you're using and what gallon mix (if not doing 1:1 e85 to pump)

Fuuuuuuuuuuuuuuuuck lol


Im on 50/50

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How many miles were you running 50/50? When was the last time the pump was opened up?

I've been running 50/50 for around 6k so far with no issues yet. Rotella t6

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I used non chlorinated brake cleaner and it cleaned up like brand new. I was on rotella t6. 3000 miles ago I tried Castrol synthetic. Don't know if that set it off. But I will not use again lol. Gonna replace this weekend with Pennzoil platinum.

I was on 50/50 for about 8000 to 10000 miles.
Pump was last openend about 3 months ago to change that big oring on the mouth.

Open that shit up and take it all apart bra

Its on my list for tomorrow now!

Have you had a chance to test it since cleaning yet?

I was planning on cleaning the pump twice a year to combat this, but sounds like that might need to go down more like every oil change.

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I ran 50/50 for > 1 year without cleaning on t6. Stay on the t6; it's the best oil there is for these cars (for the price). Reduce your mix to below 45% (you may be getting full e85 or higher) and you'll be fine; +1 gallon pump, -1 gallon corn.

Also, next time you have the pump apart, check all the o-rings.

EDIT:
The only time I cleaned the pump was because I was trying for higher mixes and it didn't go well. Probably could have lasted multiple years on 50/50.

So t6 instead of Pennzoil? I read t6 don't like the corn?

We checked orings. The inner oring (were the shaft goes thru ) was fucked up. Luckily my boy Molasses (Zach) has a bag full of them. Oring was replaced.

Edit..I'm running 35% e85 as of now.

Yeah I've read the other black death thread through a few times. Thanks for all that research/testing by the way.

I've run t6 since 1500mi on the car, before a 50/50 mix. I think I'll stay on 50/50 and monitor and develop a maintenance plan for 50/50 mix.

Do you happen to know the specs on the o-rings? I'd like to stock up before opening it and would rather not try to get them from a dealership.

Also, was lighter fluid the best cleaning solution you found? I planned on non-chlorinated brake cleaner like Ireland.

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T6 doesn't like high concentrations of corn, and the o-ring was probably the reason you had issues in the first place. You'll be fine on 50/50.

I tried brake cleaner, and lighter fluid is the best I've found. In fact, whenever I rebuild my pump, I manually prime by removing the spill valve after reinstalling the pump, and then fill the pump up to the threads with lighter fluid just to flush the system.

@Enki; would you recommend Pennzoil platinum for 50/50? Or just stick with T6.

Tapatalkin'

Just stick with t6.

Side note: PP didn't last any longer for me than t6 did.

Why not some injector cleaner? Wouldn't that essentially get the job done as well?

Does that stuff cost less than the $20/gallon I paid for naphtha?

$5/ per bottle. Right around there. Run a bottle through there every few weeks. I can't imagine it'll do a lot of harm. Any gear heads can correct me.

Why not just run a tank with no ethanol every once in a while?

Fuuuuuuck. And I thought I was safe from this running 50/50.

You are. Need more information on his mixing method though. Another guy wasn't exactly mixing his fuel properly and was getting issues.

He guys update I'm running 3.5 gal of e85 and 8 gal of 93. Running good now. I did see a couple scattered cells showing high 1500's.
When I was on 50/50 I would use 6gal of e85 and 6 gal of 93.

Did you always put in the same amount of e85 and 93 at the pump every time?

In all honesty, in the begining I was putting in 7 gal of e85 and like 5.5gal -6.5 gal of 93. I was a rookie mixer lol

I'm glad you started this thread because when I get tuned for E I was considering going 50/50 since I'll be using that map rather infrequently.

I don't understand the benefit of 50/50?

Can't you eeek all the extra timing necessary out w/ just E30?

@ms3blackmica; will be able to give you a better idea Than I will be able to.

He simply told me yes to 50/50 over 30% and some other facts.

Tapatalkin'

I went 50/50 initially for easy math

If you never cleaned it after doing that, I can just about guarantee that's where your current problems came from.

The more E85 you run, the more oxygen and cooling you get from the fuel (mini nitrous).
I would doubt that the current 11 second stock turbo Pu wouldn't be that fast on the smallest amount possible, and would probably be faster on full E.

I making the same power on 35% compared to 50%. I've been self tuning for awhile, I just don't what changes can be made to get more power out 50% safely.
I understand that more e85 can allow more timing.
I've been reading and reading and I'm very very meticulous on tuning. I guess I'm not seeing the power gains to justify 50% anymore.
I wish I did though...cause I like the powa.

I was about to ask how fuel composition would affect the intake charge temp but then google saved me.

Source: What Is The In Cylinder IAT Drop With e85?

Well the difference between 35% and 50/50 (not 50; that would likely result in deaths forming) is only about 7% alcohol content, so you probably wouldn't see much gains.

I can attest though, that the difference between 50/50 and full e85 is basically full turboback, upgraded TMIC, 3.5" intake in the winter on 50/50 vs gutted stock turboback, stock tmic, and normal size CAI on full E (actually get a tiny bit more airflow on full e than the fully bolted 50/50).

Hell of a thing, isn't it? A fuel that improves volumetric efficiency... ;)

The spill valve wasn't all that bad. But cleaning did help stabilize my pressure. I have just been having all types of issues... self induced mostly.

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So far so good on my pump pressure after cleaning.

The only thing I've noticed is when cruising around town and letting off the gas coming to a stop light per say, the pressure will drop to high 200's and then right back up to 450's for idle. Is this a problem or normal?

If you're engine braking when it drops to 200 then yes it's normal. 400s is at idle.

Yeah, that's normal. No matter what your fuel tables are set to, it will drop to 200s sometimes during engine braking; not sure exactly what the criteria are since it doesn't happen every time, but that is expected behavior.

That's what I figured. But I always want to double check my thoughts. Thanks guys:)

I haven't tested it but I see it more when engine breaking in 1st or 2nd gear. Higher gears don't seem to have an effect. Again, this is just from glancing at it while driving.

Engine brake doing 140 in 6th lol. It does it there too. Don't ask me how I know hahaha


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I don't doubt it. I've gone down hill in in 6th or 5th while engine braking and braking and it would stay above idle pressure. I'm not hypermiling so I don't put all that much thought into it.

well ive finally hit a wall with all the lurking and finally have to start posting. I apologize ahead of time if this is bad manners for my 2nd post to be in the e85 forum, but this thread has the best info related to my questions of all the ones in the last 12months and has me wondering. I am currently running what you guys call a E26 tune and I think im hitting a wall in the power im making and was wondering if going to a higher E85 mixture like E40 or E50 would help. im targeting 20psi but only getting 16 at the track and 18 on WOT cal runs... but then again, I could just be a stupid noob (very likely). id like just a bit more power but don't wont to risk ZZB on my daily driver and it looks like a little bit more corn may be the answer, but maybe I am just starting to get greedy on my lil ko4 powered stock block.

running that elusive 12sec pass is getting to be harder than I thought it would be.

Get a custom tune. Also, post a thread in the appropriate forum (this isn't it).

You won't gain any additional boost from your turbo by upping your E%. Higher E concentrations have marginal cooling effects.

I do have a custom tune. I was just curious about the benefits of going from e26 to e48. thanks though. that pretty much answers my question. back to lurk mode now...

From someone on MSF?

Open up a separate thread with a few logs and have people take a look. Plenty of people on this forum would be willing to help (especially if you donate).

Cheers

I wouldn't call going from E26 to E85 or even E48 a "marginal improvement in cooling."

Would you happen to have any data to back up your statement?

I'm not sure if he posts on this site or not. I never asked. im currently running 1gal E85-2.5gal93octane tune which I assumed is what you guys call a e26tune. just wondering if I can squeeze a bit more power up top safely since I am so close to my goal at the track.
thanks.

Lol that's E31 assuming E85 + E10 (pump 93)...Lowest would be E27 assuming you're getting fucked with winter blend + bare minimum E content.

We have an E85 section which has cheat sheets that break all the math down for you. I even made calculators.

well I'll be damned. that's the one sticky thread I didn't look at ugh. would I be wrong to assume then that going to a 50/50mix blend aka E48 would not be worth my time/effort/money if all I want is to make enough power to knock a couple more tenths off in the 1/4 mile? my goal is running a 12.99 or better in my bolt'd ko4 ms6. its becoming a lot harder a goal to achieve than I thought.

thanks for the help enki

One way to find out. All it costs you is time at the pump and a map flash.

there you go again with the common sense....

thanks again.