|
|
|
|
Thread Tools | Display Modes |
10-05-2011, 07:59 AM | #4551 |
Scooby Specialist
Member#: 183480
Join Date: Jun 2008
Chapter/Region:
South East
|
my walbro 255 did okay on Airboy up to about 400whp on stock fuel pressure...after that point the IDC's had to come up and boost down slightly to compensate. the highest i could get it without my AF ratios swinging WAY too lean was around 450whp...that map was WAY too aggressive in terms of AF ratio to run normally though. i only had that as a track map if i ever decided to go...i personally wouldn't recommend running the walbro 255 much over 400whp at stock fuel pressure. it was just too dicey for me to be comfortable with it. everytime the weather or altitude changed drastically, my car would run totally different AFR's.
* Registered users of the site do not see these ads.
Last edited by amalgrover; 10-05-2011 at 09:16 AM. |
10-05-2011, 01:24 PM | #4552 |
Scooby Specialist
Member#: 218739
Join Date: Jul 2009
Chapter/Region:
TXIC
Location: TX
Vehicle:2002 WRX hybrid |
Well I'm figuring I should be around 400whp on a Mustang dyno.. so basically I'm where I thought I would be, right on the edge of its capabilities, which is not where I want to be.
It sounds like my Walbro will work, but I might start seeing inconsistencies in flow in the very top end. I don't imagine I'm going to be running over 26lbs of boost, but I don't want to be limited by a $160 fuel pump, and I certainly don't want it to struggle holding target AFRs with environmental changes. I always thought if I upgraded to an Aeromotive in tank pump I would also go ahead and get an adjustable FPR with a gauge so I could bump up the pressure to ~60-65psi.. but I suppose the adjustable FPR isn't really necessary. |
10-05-2011, 01:44 PM | #4553 |
Scooby Guru
Member#: 133146
Join Date: Nov 2006
Location: SC
Vehicle:07 FPgreen 7.37@95 WRX VF39+E85 12.0, 121mph |
every car is different...
I made 420whp with my green on Airboy and Ron didn't have any problems tuning my car and had no issues for the 10k miles that I run with the green. The car that I tuned makes the same power and he doesn't have any fueling issues. We are at 1000 feed of elevation. |
10-05-2011, 03:18 PM | #4554 |
Scooby Specialist
Member#: 218739
Join Date: Jul 2009
Chapter/Region:
TXIC
Location: TX
Vehicle:2002 WRX hybrid |
Right.. it sounds like it might be fine, or it might not. I've pretty much gone one degree overboard on every aspect of the build just to make sure everything is good.. it doesn't make much sense to skimp on the fuel pump now at the last minute. Although I am also out of money, so it's a tough choice.
Then again, if I do buy another pump, I will have a complete turbo upgrade kit to sell (headers/uppipe, VF22, 830cc modded injectors, Walbro pump, and a custom 3" turboback). So having the extra pump to go with the rest of the stuff I have kicking around might not be a bad thing. |
10-05-2011, 03:53 PM | #4555 | |
Scooby Guru
Member#: 133146
Join Date: Nov 2006
Location: SC
Vehicle:07 FPgreen 7.37@95 WRX VF39+E85 12.0, 121mph |
Quote:
|
|
10-05-2011, 03:58 PM | #4556 | |
Scooby Guru
Member#: 36033
Join Date: Apr 2003
Chapter/Region:
SCIC
Location: Tuning Lab
Vehicle:CEO PhatBottiTuning 2006 STi GTX3582 + Meth |
Quote:
Its basically a crapshoot with the in-tank ones....its the tradeoff of how much does the injector flow increase vs the fuel pump decrease. In all cases i've tried the fuel pump decrease was greater than the injector increase and the cars leaned out worse. |
|
10-05-2011, 04:10 PM | #4557 |
Scooby Newbie
Member#: 62985
Join Date: May 2004
Location: Normal, IL
Vehicle:2005 STi Platnium Silver |
I find this hard to believe. My friend has had continued failure with the Walbro 255s on e85 and my tuner from P&L is a big fan of the Aeromotive 340 pump for e85 etc. Not saying one is better than the other, just I have heard very good things with the Aeromotive and think it is a crap shoot no matter which pump you go with.
|
10-05-2011, 04:10 PM | #4558 |
Scooby Guru
Member#: 133146
Join Date: Nov 2006
Location: SC
Vehicle:07 FPgreen 7.37@95 WRX VF39+E85 12.0, 121mph |
STM on EVOM is claiming that they are getting out 60whp more from the 400plh walbro than from the 340phl aeromotive before maxing it out. Someone needs to try it on a suby
|
10-05-2011, 04:12 PM | #4559 | |
Scooby Guru
Member#: 133146
Join Date: Nov 2006
Location: SC
Vehicle:07 FPgreen 7.37@95 WRX VF39+E85 12.0, 121mph |
Quote:
|
|
10-05-2011, 04:12 PM | #4560 |
Scooby Specialist
Member#: 218739
Join Date: Jul 2009
Chapter/Region:
TXIC
Location: TX
Vehicle:2002 WRX hybrid |
Yea, I realize that flow will dramatically decrease when the pressure is raised. So if you're not getting enough fuel raising the pressure will only compound your problems. My injectors should flow more than enough already, so there's not really much point in raising the pressure.
Now, if I were to go to a surge tank with an inline pump it would be a different story, but that kind of setup would be major overkill for this turbo in my DD. I hadn't heard of Aeromotive pumps failing with e85.. in that case then I might as well just get the Deatschwerks 300lph pump. The 400lph Walbro is too new to know, plus the DW pump will flow more than enough for what I need. |
10-05-2011, 05:12 PM | #4561 | |
Scooby Guru
Member#: 36033
Join Date: Apr 2003
Chapter/Region:
SCIC
Location: Tuning Lab
Vehicle:CEO PhatBottiTuning 2006 STi GTX3582 + Meth |
Quote:
Lets just say the walbro craps at 400whp and a aero340 craps at 450whp. If you have a boost line pop off on the walbro and you hit 35psi....you would lean out alot, whereas on the aero340 you would have more of a safety cushion. I dont think a bigger pump is ever a bad thing....besides cost n noise. |
|
10-05-2011, 05:18 PM | #4562 |
Scooby Specialist
Member#: 218739
Join Date: Jul 2009
Chapter/Region:
TXIC
Location: TX
Vehicle:2002 WRX hybrid |
Just to make sure, I'm looking at the Aeromotive PN:11142? I see they have several different configurations..
|
10-06-2011, 06:39 AM | #4563 |
Scooby Specialist
Member#: 183480
Join Date: Jun 2008
Chapter/Region:
South East
|
if you look at the flow sheets for the walbro 400lph pump, it is only flowing about 10-15 more lph than the aero340 pump at 70psi (which is where most of us need it)...so it honestly isn't THAT GREAT of a pump choice. while it is better than the walbro255, it isn't that much better than the aero340. BUT...if all you needed was a tiny bit more headroom, then that would be the pump for you.
|
10-06-2011, 11:46 AM | #4564 | |
Scooby Guru
Member#: 64908
Join Date: Jun 2004
Chapter/Region:
Tri-State
Location: Tuning 8/9sec Subies all over
Vehicle:10.8 XT+9.2@155 GR+ 9.1/157mph 2015 STI |
Quote:
Either way you guys need to start looking to amps/voltage at your fuel pumps. You will be surprised how well some of the "maxed out" pumps do with proper current going to them. Jr |
|
10-06-2011, 11:50 AM | #4565 |
Scooby Guru
Member#: 36033
Join Date: Apr 2003
Chapter/Region:
SCIC
Location: Tuning Lab
Vehicle:CEO PhatBottiTuning 2006 STi GTX3582 + Meth |
|
10-06-2011, 12:30 PM | #4566 |
Scooby Specialist
Member#: 245581
Join Date: Apr 2010
Chapter/Region:
MWSOC
Location: Marshall, MI
Vehicle:2009 WRX 2014 Forester XT |
Besides boost-a-pump DW told me just hard wiring can give it slightly more voltage just because of the losses associated with the factory harness. Not much but enough to ensure the pump is getting the voltage it wants.
|
10-06-2011, 01:10 PM | #4567 | |
Scooby Guru
Member#: 64908
Join Date: Jun 2004
Chapter/Region:
Tri-State
Location: Tuning 8/9sec Subies all over
Vehicle:10.8 XT+9.2@155 GR+ 9.1/157mph 2015 STI |
Quote:
Rewire with 10/8 gauge wire, higher amp relay, higher amp fuse, and 08+ Alternator provides better amps over all. Pretty easy stuff and probably only like 150 bucks plus your time. On a side note, it is beyond me that people wouldn't spend 230 bucks on something like that or even 350 on a real pump regulator.. Instead they will spend 500-600 on injectors, switch fuel pumps every other day ect.. Amazing Jr |
|
10-06-2011, 02:31 PM | #4568 |
Scooby Specialist
Member#: 218739
Join Date: Jul 2009
Chapter/Region:
TXIC
Location: TX
Vehicle:2002 WRX hybrid |
I've already upgraded my electrical system, so it runs right at 14.3 volts and can supply 100amps at 1000rpm if need be. It wouldn't be a bad idea to run new wire to the pump though..
|
10-06-2011, 03:10 PM | #4569 |
Scooby Specialist
Member#: 251552
Join Date: Jul 2010
Chapter/Region:
SWIC
Location: New Mexico
Vehicle:2017 STI Pure Red |
Looks like I'm moving to Italy at the end of the year. Anybody know if they have E85?
Also, how do you guys gap your plugs? I'm kind of nervous to just smack them on concrete. They are currently at 0355ish so I've got a ways to go down. |
10-06-2011, 03:15 PM | #4570 |
Scooby Specialist
Member#: 178426
Join Date: Apr 2008
Location: FoCo
Vehicle:2010 S4 Gray |
Depends on what turbo/ how much boost.
|
10-06-2011, 03:22 PM | #4571 | |
Scooby Guru
Member#: 36033
Join Date: Apr 2003
Chapter/Region:
SCIC
Location: Tuning Lab
Vehicle:CEO PhatBottiTuning 2006 STi GTX3582 + Meth |
Quote:
i've tried jacking up the fp on cars with aeromotive fpr's and intank pumps and still had no luck. does the aero fpr suck or something? And they arent spending that much on the injectors....the five-0's are $360 MSRP |
|
10-06-2011, 03:57 PM | #4572 |
Scooby Specialist
Member#: 165141
Join Date: Nov 2007
Chapter/Region:
MWSOC
Location: WI
|
|
10-06-2011, 05:52 PM | #4573 | |
Scooby Specialist
Member#: 77470
Join Date: Dec 2004
Chapter/Region:
MWSOC
Location: grove city ohio
Vehicle:04 sti 10.41@141 on e85@ 30psi--spinning |
Quote:
|
|
10-06-2011, 05:52 PM | #4574 |
Scooby Specialist
Member#: 218739
Join Date: Jul 2009
Chapter/Region:
TXIC
Location: TX
Vehicle:2002 WRX hybrid |
well.... no, not really At least not 95% of the time, but if I happen to be using my car to supply light and/or music for a long period of time it can come in handy. My OEM alternator was struggling to put out 40 amps at 1000rpm and the voltage was all over the place, usually between 11.5v and 13v, but never more. My upgraded alternator is built inside a Forrester XT housing, and the larger housing, along with high quality internals allow it to run much more efficiently. So there's less drag on the engine, plus the voltage regulation is WAY better. After doing the +.5v diode mod I never see below 14.2 volts, and never above 14.4 volts. The Aeromotive pump probably isn't "necessary", and neither are my H-Beam rods. Hell, one could argue that modification to any vehicle isn't "necessary".. but is it better? In the case of my alternator, I would say yes. |
10-06-2011, 06:04 PM | #4575 |
Scooby Specialist
Member#: 165141
Join Date: Nov 2007
Chapter/Region:
MWSOC
Location: WI
|
^I though you meant you had a 100 amp circuit to your fuel pump... nevermind
|
Thread Tools | |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
Motion Lab Tuned: Juanmedina's 2007 WRX E85 ARMY | Motion Lab Tuning | Proven Power Bragging | 125 | 04-12-2010 02:57 AM |
jid2 Track Car - e85 ARMY | jid2 | Member's Car Gallery | 38 | 01-22-2010 10:44 PM |
The Honduran army is the bravest in the world... | wrxcelent | Off-Topic | 36 | 07-07-2009 08:21 AM |
Spacific E85 Tuning thread Here ? | discopotato03 | Engine Management & Tuning | 1 | 09-09-2008 11:01 AM |
Did anyone hear the one about the Italian army and the IRAQI satiation? | Asinine | Off-Topic | 3 | 09-20-2005 07:06 PM |