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| 3800SC E-85 Fuel Pump (Page 1/1) |
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FIER086
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FEB 20, 11:21 AM
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I am throwing the idea around of going the E85 route with my 3800SC. My question is, will my AC Delco EP381 fuel pump be sufficient/E85 compatible? If not, what do you recommend?
3800SC
VS cam
TOG Headers
CAI
3.3 pulley
stock injectors
ZZP Dyno tune- 290whp @ 320tq
Thanks------------------
'87 GT - 5spd, Project Car- 3800SC II: Full Rebuild, VS Cam, 90# Springs, 3.3 pulley, TOG headers, 3.5" CAI, WP underdrive pulley, A104's, 180* thermostat, 36lb injectors & SPEC 3+ clutch- 38SP3CL: 290whp @ 320 lb/ft
'86 SE 2m4: my first car at 16- SOLD 
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theogre
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FEB 20, 05:40 PM
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The Entire fuel system needs all parts that will take E15 to E85 not just the pump.
And w/o flex-fuel sensor and ECM/PCM program to use it you will have problems driving in/thru other places that don't carry E85 anywhere because fuel map and ignition timing changes for the actual fuel mix you have at the time.------------------
Dr. Ian Malcolm: Yeah, but your scientists were so preoccupied with whether or not they could, they didn't stop to think if they should.
(Jurassic Park)
The Ogre's Fiero Cave
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Spoon
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FEB 20, 07:41 PM
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Based on this article I'd stick to real gasoline.
https://www.edmunds.com/fue...comparison-test.html
Spoon
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"Kilgore Trout once wrote a short story which was a dialogue between two pieces of yeast. They were discussing the possible purposes of life as they ate sugar and suffocated in their own excrement. Because of their limited intelligence, they never came close to guessing that they were making champagne." - Kurt Vonnegut
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OntarioKev
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FEB 20, 11:15 PM
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I am assuming you know all about tuning and using e85 so I will ignore that.
That pump is good for roughly 350 crank hp on E85 forced induction based on a flow calculator, and the info I found stating 50 GPH on that pump.
You are probably fine, but will be close to the limit of the pump
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tampalinc
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FEB 22, 10:55 AM
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I am in the process of switching to Flex Fuel and these are the pumps I have narrowed it down to. I have been looking for pumps listed as E85 compatible.
F90000267 Walbro 450LPH, E85
F90000285 Walbro HELLCAT 525LPH, E85
My current pump is a Walbro 340M.[This message has been edited by tampalinc (edited 02-22-2019).]
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FieroGTguy
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APR 13, 08:49 PM
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La fiera
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APR 13, 09:44 PM
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Walbro Electric In-Tank Fuel Pumps F90000285 470LPH
This is all you need. Summit racing has it for about $120.
You'll have to do some splicing in 2 wires and that's all.
And your 36lbs injectors should be upgraded to 42lbs injectors.[This message has been edited by La fiera (edited 04-13-2020).]
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Dennis LaGrua
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APR 14, 04:22 PM
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I can understand the reluctance and the possible side effects of using E85 due to it being only 15% gasoline and 85% alcohol BUT E10 ( standard pump gas) is 10% alcohol. Will that extra alcohol make that much of a difference on the erosion of the fuel lines and seals? Point is the fuel system is already being subjected to alcohol.
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" THE BLACK PARALYZER" -87GT 3800SC Series III engine, custom ZZP /Frozen Boost Intercooler setup, 3.4" Pulley, Northstar TB, LS1 MAF, 3" Spintech/Hedman Exhaust, P-log Manifold, Autolite 104's, MSD wires, Custom CAI, 4T65eHD w. custom axles, Champion Radiator, S10 Brake Booster, HP Tuners VCM Suite.
"THE COLUSSUS"
87GT - ALL OUT 3.4L Turbocharged engine, Garrett Hybrid Turbo, MSD ign., modified TH125H
" ON THE LOOSE WITHOUT THE JUICE " [This message has been edited by Dennis LaGrua (edited 04-14-2020).]
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OntarioKev
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APR 15, 11:44 AM
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Not just the fuel system, but e85 will wear out your O2 sensors faster as well.
Worth it for the extra power you can make!
People who have used e85 on fuel systems not designed for it often have their injectors clog as the fuel lines break down and gum up your injectors.
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