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Old 10-26-2012, 04:36 PM   #6601
Maxwell Power
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Quote:
Originally Posted by Concillian View Post
Was more talking about E85 specific engines... that cannot run on pump due to octane requirements.

E85 conversions take advantage of the octane for power, I'm more talking OEM applications that would balance the extra octane for power and fuel economy... think a stock 2.5L WRX powerband from a 1.8 or 2.0L that gets a real world ~35 MPG... that kind of thing.

You know how all these people in college talk about the SAE Formula team? Yeah, I was one of those wierdos on the SAE high mileage vehicle team. I'm an odd duck.
seems to me that e85 would do a good job supporting lean burn.
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Old 10-26-2012, 04:55 PM   #6602
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Originally Posted by Maxwell Power View Post
seems to me that e85 would do a good job supporting lean burn.
It does alright on my 2.0, the tuning takes some time to tweak in for throttle transitions, but ultimately the 2.0L lacks so much off-boost torque that I went back to near stoich. I anticipate going back to lean burn when I:

swap in a 207 for AVCS while putting on my EFR6758
rebuild for 79mm stroke and 12-12.5:1 CR

That should push the off-boost torque near the levels of the 2.5L, which should give me more room to play with and still have decent around town drivability. Small-ish turbo with decent compressor map at the low-ish boost I'll need to run.

Currently trying to find a ver8 with an ECU, JDMracingmotors is out of ECUs right now. Gonna swap first while I build the 205 block, then move the 207 heads over.
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Old 10-26-2012, 05:32 PM   #6603
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Originally Posted by Concillian View Post
It does alright on my 2.0, the tuning takes some time to tweak in for throttle transitions, but ultimately the 2.0L lacks so much off-boost torque that I went back to near stoich. I anticipate going back to lean burn when I:

swap in a 207 for AVCS while putting on my EFR6758
rebuild for 79mm stroke and 12-12.5:1 CR

That should push the off-boost torque near the levels of the 2.5L, which should give me more room to play with and still have decent around town drivability. Small-ish turbo with decent compressor map at the low-ish boost I'll need to run.

Currently trying to find a ver8 with an ECU, JDMracingmotors is out of ECUs right now. Gonna swap first while I build the 205 block, then move the 207 heads over.
lean burn is harder on low compression like your 2L. I'd like to do lean burn on the DI 12.5:1 engine in the BRZ.
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Old 10-26-2012, 05:54 PM   #6604
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I'd like to do lean burn on the DI 12.5:1 engine in the BRZ.
haha, I would too, but my checkbook and mortgage dictate I must experiment in a way that's $20,000+ cheaper than buying a BRZ.
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Old 10-30-2012, 10:53 AM   #6605
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Is it safe to use non lead base solder on pump wires with E85 in the tank? I'm planning on rewiring my pump wire from the pump to pump housing on my 11 STI from stock to 10 ga. I could just use crimp and no solder but I was thinking the solder will provide extra insurance for connection.
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Old 10-30-2012, 11:03 AM   #6606
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Originally Posted by Concillian View Post
haha, I would too, but my checkbook and mortgage dictate I must experiment in a way that's $20,000+ cheaper than buying a BRZ.
with the amount of work you're talking about doing on your Bugeye, you'd almost be better off buying a new car.

This is impressive though guys, I wish E85 was more readily available around here. Then I could re-tune my GC and not have to spend 10+/gallon on race fuel.
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Old 11-05-2012, 09:45 PM   #6607
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Looking for experience out there. I've blown through 3 fuel pumps over the past 12 months running about 15k e85 miles and track sessions.
( walbro 255 and two aeromotive 340).
I've spoken to shops, aeromotive, and read multiple forums regarding e85 and fuel pump failures. I have a 2011 STI and the fuel filter is just on the fuel pump. Aeromotive says that filter is critical but I can't see how it serves much honestly. It's design seems very old. Anyway, I'm looking for a diamond in the rough here. Anyone running higher HP that's had a lot of success on e85? I've found a couple pumps that are listed as true e85 compatible, Walbro 400lph ( 485) - not a drop in direct replacement and some other off the wall brands ... Treadstone performance.

I'm tired of getting stranded. E85 is a fun animal to ride though so I'm all ears. Thanks for any feedback !
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Old 11-05-2012, 10:03 PM   #6608
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What fuel pressure are you running? How is it wired? (Full on/controller)
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Old 11-05-2012, 10:20 PM   #6609
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The only time i've seen walbros or aeromotives go bad in e85 all had to do with running too much fuel pressure. (not saying they don't go bad for other reasons, but that has been my 5+year experience with e85)

DK
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Old 11-06-2012, 12:10 AM   #6610
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^ this
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Old 11-06-2012, 11:51 AM   #6611
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Quote:
Originally Posted by slowgenius View Post
What fuel pressure are you running? How is it wired? (Full on/controller)
FP is 44-48 most of the time. I have an Aeromotive FPR installed.

I'm running FULL all the time.
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Old 11-06-2012, 03:58 PM   #6612
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put a lot of miles on my bosch w/surge tank no issues.
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Old 11-06-2012, 04:48 PM   #6613
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Quote:
Originally Posted by threelete

FP is 44-48 most of the time. I have an Aeromotive FPR installed.

I'm running FULL all the time.
From your failure rate it looks like that may be your issue. You need a continuous duty pump.
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Old 11-07-2012, 02:20 AM   #6614
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Has anyone with a 2.0 ran into surge issues with a 255 and below 1/3 a tank of fuel in hard cornering or acceleration?
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Old 11-07-2012, 02:25 AM   #6615
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02-05 wrx's don't have "surge tanks" around the fuel sock like the other years.....so yes they are prone to lean out on cornering at low fuel levels.
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Old 11-07-2012, 02:28 AM   #6616
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Originally Posted by Phatron View Post
02-05 wrx's don't have "surge tanks" around the fuel sock like the other years.....so yes they are prone to lean out on cornering at low fuel levels.
I have a STI plastic "surge tank" but I'm going to have to modify/ make a bracket to attach it to the pickup. You think that'd be enough for my fuel flow to keep it from having issues?
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Old 11-07-2012, 02:50 AM   #6617
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i've never noticed the issue on newer cars...so based on what i've seen it should be fine. but of course its just best/easiest to log and check.
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Old 11-07-2012, 04:08 AM   #6618
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So I'm taking the dive into the e85 world next Friday just ordered my injectors 1000cc for my 2011 WRX. Pretty stoked had a question though about fuel pumps.

My car currently has the following mods
AEM intake
Invidia turbo back (cat less)
FMS TMIC
NGK one step colder plugs
DW65c drop in fuel pump
Forge BPV

Will my current fuel pump be okay or should I move up to a aeromotive 340lp? The DW flows 265lph. Any ideas? Also if with cat less am I prone to over boosting compared to a catted dp on E85. On 91 I was experiencing boost creep on the stock boost controller. Once I switched to the Grimmspeed 3 port the issue was resolved with a few tweaks to my map. I'm debating about switching to a catted dp to prevent me having to use a EWG. Thoughts?

Last edited by PROcede; 11-07-2012 at 10:53 AM.
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Old 11-07-2012, 07:19 AM   #6619
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Originally Posted by breaksOFTEN View Post
3.89/gal in CA, but our prices always suck. And I think it was in the 90's today
$3.47 in the south bay. i freaking love my e85 tune.

sti long block.
vf43
dw 750's
dw 330 pump
stock tmic
gs 3port

341whp 368 lbs torque @ 20psi

dammit i already want to go bigger
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Old 11-07-2012, 09:54 AM   #6620
Juks
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Quote:
Originally Posted by 340Duster View Post
I have a STI plastic "surge tank" but I'm going to have to modify/ make a bracket to attach it to the pickup. You think that'd be enough for my fuel flow to keep it from having issues?
It will help a little, but no matter what you do a standard in-tank pickup design will always starve below a certain level. In my wrx I notice it at a half tank in a sharp enough corner with enough lateral g's. Even in my STI which wasn't quite as prone to fuel starve as the wrx has been (plastic piece metioned above), once I was over 400whp on the track, it would still starve on hard corners with as much as a half tank. On stage 2 power levels (less g's) I noticed it at a little over a 1/4 tank.

The only way to completely eliminate it is to get a surge tank. They're not that expensive and it's easy to set up.
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Old 11-07-2012, 11:26 AM   #6621
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Quote:
Originally Posted by PROcede View Post
So I'm taking the dive into the e85 world next Friday just ordered my injectors 1000cc for my 2011 WRX. Pretty stoked had a question though about fuel pumps.

My car currently has the following mods
AEM intake
Invidia turbo back (cat less)
FMS TMIC
NGK one step colder plugs
DW65c drop in fuel pump
Forge BPV

Will my current fuel pump be okay or should I move up to a aeromotive 340lp? The DW flows 265lph. Any ideas? Also if with cat less am I prone to over boosting compared to a catted dp on E85. On 91 I was experiencing boost creep on the stock boost controller. Once I switched to the Grimmspeed 3 port the issue was resolved with a few tweaks to my map. I'm debating about switching to a catted dp to prevent me having to use a EWG. Thoughts?
Congrats! You'll be surprised what E85 can do even with your mild setup.

The DW65c will be plenty with the 1000 cc injectors. You won't even break 80% injector duty cycle on the stock turbo. I run the same pump with 1000's.

Skip the colder plugs. You don't need them with E85 and they can even be problematic sometimes. Stick with your stock plugs.

You won't have to worry about boost creep with E85. Much of your extra power is going to come from pushing your stock turbo beyond its efficiency range so its going to be holding as much boost as possible.
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Old 11-07-2012, 11:28 AM   #6622
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What kind of issues have you guys seen with the colder plugs? I have one-step colder in mine...and i'm wondering if the startup or tip-in issues may be because of them.
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Old 11-07-2012, 11:31 AM   #6623
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Quote:
Originally Posted by Squidz
What kind of issues have you guys seen with the colder plugs? I have one-step colder in mine...and i'm wondering if the startup or tip-in issues may be because of them.
e85 is a cooler fuel so you don't need colder plugs you need stock heat range smaller gap helps too. Like 26
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Old 11-07-2012, 11:36 AM   #6624
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*edit*

Dbl post
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Old 11-07-2012, 11:36 AM   #6625
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Quote:
Originally Posted by WRXt4cy

Congrats! You'll be surprised what E85 can do even with your mild setup.

The DW65c will be plenty with the 1000 cc injectors. You won't even break 80% injector duty cycle on the stock turbo. I run the same pump with 1000's.

Skip the colder plugs. You don't need them with E85 and they can even be problematic sometimes. Stick with your stock plugs.

You won't have to worry about boost creep with E85. Much of your extra power is going to come from pushing your stock turbo beyond its efficiency range so its going to be holding as much boost as possible.
Sounds great! My car already has the one step colder plugs installed for about 10k miles. Is it the general consensus though that stock plugs are better when on e85? A buddy of mine has warm start issues but not cold start since here in northern cali it doesn't get too cold. Perhaps that's his issue.
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