how lean can you run e85 - SRT Forums

reed32 · 09-13-2008, 03:18 PM

Ive been doing a lot of research lately on this fuel and i have yet to find out how lean is safe for e85.

currently I'm running 650cc injectors and getting no kr at all.

timing is 28.5 during spool climbing to 32*+ at redline @20psi on stock turbo.
i've tried plenty of mixtures and finally found the right mix for the car.
Just wondering how lean we can go. From my understanding e85 is around 105 octane rating.
The car absolutley loves e85 mix.

right now the af's are 12.0 to 12.2 with no kr.

thanks in advance for input.

p.s. gas mileage is not as great with e85. im getting about 50miles less per tank.

joe smalls · 09-13-2008, 10:25 PM

i wouldn't go any higher than 12.5 on full boost. i typically try to keep it as close to 11.5 with straight e-85.

reed32 · 09-14-2008, 02:55 AM

Quote: Originally Posted by joe smalls

i wouldn't go any higher than 12.5 on full boost. i typically try to keep it as close to 11.5 with straight e-85.

i never take the cars to the 12.5 range. i still think i need larger injectors than te one's im running because i'm only pulling like 6%

joe smalls · 09-14-2008, 06:37 PM

i run 1000cc was running out of fuel up top was at 120 duty on the injectors. so i upgraded the fuel system with -8 line a regulator bigger pump and rewire.

reed32 · 09-14-2008, 07:22 PM

Quote: Originally Posted by joe smalls

i run 1000cc was running out of fuel up top was at 120 duty on the injectors. so i upgraded the fuel system with -8 line a regulator bigger pump and rewire.

damn. what turbo you running?

EDOGSRT · 09-14-2008, 09:25 PM

Quote: Originally Posted by joe smalls

i wouldn't go any higher than 12.5 on full boost. i typically try to keep it as close to 11.5 with straight e-85.

i think lambda for e-85 is 9:1 gas is 14.7:1. so i think 12.5 on e85 is super lean.

joe smalls · 09-15-2008, 12:11 PM

Quote: Originally Posted by reed32

damn. what turbo you running?

precisionsc61

NeonDan · 09-15-2008, 12:17 PM

Quote: Originally Posted by EDOGSRT

i think lambda for e-85 is 9:1 gas is 14.7:1. so i think 12.5 on e85 is super lean.

funny thing is on 40/60 mix (e85/93 pump) stock turbo SRTs will see pretty decent power gains at 10.8-11.5 AFR...i havent tried 50/50 because i need more injector

joe smalls · 09-15-2008, 12:20 PM

here is a article hopefully it helps.
E85 in standard engines - Wikipedia, the free encyclopedia

ayoungblood · 09-15-2008, 12:39 PM

7.5:1 on E85 should be good according to that article...

ziggo0 · 09-15-2008, 01:55 PM

So you can run e85 mix in a stock SRT ?

NeonDan · 09-15-2008, 01:58 PM

with bigger injectors than stock...yes on stock injectors you wouldnt have a enough fuel to run anything more than a 15-20% E85 to pump mix. The rule is to run e85 is that you need 20-30% larger injectors or use a conversion kit

the car i posted about is running s2 injectors and s1 pcm but i need more injector given the mods. Car made 295whp/280wt @ 14psi on a 40% e85/60% pump mix....AFRs pegged in the 10s

reed32 · 09-16-2008, 12:53 AM

Quote: Originally Posted by ziggo0

So you can run e85 mix in a stock SRT ?

no. the car will run to lean. ive tried it already and a/f's went 13's.

.

reed32 · 09-16-2008, 12:57 AM

Quote: Originally Posted by NeonDan

with bigger injectors than stock...yes on stock injectors you wouldnt have a enough fuel to run anything more than a 15-20% E85 to pump mix. The rule is to run e85 is that you need 20-30% larger injectors or use a conversion kit

the car i posted about is running s2 injectors and s1 pcm but i need more injector given the mods. Car made 295whp/280wt @ 14psi on a 40% e85/60% pump mix....AFRs pegged in the 10s

Dan tonight i took my shop car out and went to grab some e85. This car has HOM AND GUESS WHAT? HOM STAYED ON DURING ALL THE PULLS

.

22 BUCKS TO FILL UP THE TANK WITH MY MIX

TIRES LITE UP BAD

turbo666 · 09-16-2008, 04:43 AM

Go to Evo forums, LOTS of E85 info over there. I have a buddy with an Evo on E85 and he made 456 on Buscher's dyno on a FP Red. Another one with a 35R that made almost 600whp on just E85 at a local dyno, that thing will lite the tires up in 1st! They keep there afr's around 11.5, they tried 12.0 but stared getting knock. Some of the E85 guys are doing high compression builds now, like 10.0:1! That's crazy, but I know one guy made over 1000awhp with 10:1 and E85.

If E85 was more prevalent in this area I'd switch to it, but only 1 station within 50 miles.

09-13-2008, 03:18 PM	#1 (permalink)
reed32 SRTforums Member Join Date: Oct 2003 Member Number: 4648 Location: Pitts,CA Posts: 8,668	how lean can you run e85 Ive been doing a lot of research lately on this fuel and i have yet to find out how lean is safe for e85. currently I'm running 650cc injectors and getting no kr at all. timing is 28.5 during spool climbing to 32+ at redline @20psi on stock turbo. i've tried plenty of mixtures and finally found the right mix for the car. Just wondering how lean we can go. From my understanding e85 is around 105 octane rating. The car absolutley loves e85 mix. right now the af's are 12.0 to 12.2 with no kr. thanks in advance for input. p.s. gas mileage is not as great with e85. im getting about 50miles less per tank. __________________ JnR* Chase for 10's in norcal is on for DSP NEEDS PM only: Turbo66, Mindmelt,

09-13-2008, 10:25 PM	#2 (permalink)
joe smalls SRTforums Member Join Date: Oct 2004 Member Number: 18856 Location: Poulsbo, WA Posts: 682	i wouldn't go any higher than 12.5 on full boost. i typically try to keep it as close to 11.5 with straight e-85. __________________ not a thing just another slow a$$ neon

09-14-2008, 02:55 AM	#3 (permalink)
reed32 SRTforums Member Join Date: Oct 2003 Member Number: 4648 Location: Pitts,CA Posts: 8,668	Quote: Originally Posted by joe smalls i wouldn't go any higher than 12.5 on full boost. i typically try to keep it as close to 11.5 with straight e-85. i never take the cars to the 12.5 range. i still think i need larger injectors than te one's im running because i'm only pulling like 6% __________________ JnR Chase for 10's in norcal is on for DSP NEEDS PM only: Turbo66, Mindmelt,

09-14-2008, 06:37 PM	#4 (permalink)
joe smalls SRTforums Member Join Date: Oct 2004 Member Number: 18856 Location: Poulsbo, WA Posts: 682	i run 1000cc was running out of fuel up top was at 120 duty on the injectors. so i upgraded the fuel system with -8 line a regulator bigger pump and rewire. __________________ not a thing just another slow a$$ neon

09-14-2008, 07:22 PM	#5 (permalink)
reed32 SRTforums Member Join Date: Oct 2003 Member Number: 4648 Location: Pitts,CA Posts: 8,668	Quote: Originally Posted by joe smalls i run 1000cc was running out of fuel up top was at 120 duty on the injectors. so i upgraded the fuel system with -8 line a regulator bigger pump and rewire. damn. what turbo you running? __________________ JnR Chase for 10's in norcal is on for DSP NEEDS PM only: Turbo66, Mindmelt,

Remove Advertisements Sponsored Links
SRT Forums - SRT4, SRT6, SRT8, SRT10 & Dodge Forum Advertisement

09-14-2008, 09:25 PM	#6 (permalink)
EDOGSRT SRTforums Member Join Date: Apr 2007 Member Number: 52801 Location: CHICAGO, IL Posts: 291	Quote: Originally Posted by joe smalls i wouldn't go any higher than 12.5 on full boost. i typically try to keep it as close to 11.5 with straight e-85. i think lambda for e-85 is 9:1 gas is 14.7:1. so i think 12.5 on e85 is super lean. __________________ AGP 3147, BOOMBA THROTTLE BODY, 3IN TBE, DW 750'S, WALBRO 255, RETURN LINE, MSD DIS 2 AND WIRES, ED HARD PIPES, ED CHARGE PIPE, HKS BOV, BFG DR'S ON ROTA'S, MOPAR STS, AEM WIDE BAND, AEM TRU-BOOST, AEROFORCE SCANGUAGE, SNOW PERFORMANCE STAGE 2, CAI

09-15-2008, 12:11 PM	#7 (permalink)
joe smalls SRTforums Member Join Date: Oct 2004 Member Number: 18856 Location: Poulsbo, WA Posts: 682	Quote: Originally Posted by reed32 damn. what turbo you running? precisionsc61 __________________ not a thing just another slow a$$ neon

09-15-2008, 12:17 PM	#8 (permalink)
NeonDan User Banned Join Date: Dec 2002 Member Number: 138 Location: TB Fl./GSP SC. Posts: 27,065	Quote: Originally Posted by EDOGSRT i think lambda for e-85 is 9:1 gas is 14.7:1. so i think 12.5 on e85 is super lean. funny thing is on 40/60 mix (e85/93 pump) stock turbo SRTs will see pretty decent power gains at 10.8-11.5 AFR...i havent tried 50/50 because i need more injector

09-15-2008, 12:20 PM	#9 (permalink)
joe smalls SRTforums Member Join Date: Oct 2004 Member Number: 18856 Location: Poulsbo, WA Posts: 682	here is a article hopefully it helps. E85 in standard engines - Wikipedia, the free encyclopedia __________________ not a thing just another slow a$$ neon Last edited by joe smalls; 09-15-2008 at 12:25 PM.

09-15-2008, 12:39 PM	#10 (permalink)
ayoungblood SRTforums Member Join Date: Jan 2004 Member Number: 7132 Location: St.Clair Shores Posts: 1,450	7.5:1 on E85 should be good according to that article... __________________ 2k4 Srt-4

09-15-2008, 01:55 PM	#11 (permalink)
ziggo0 SRTforums Member Join Date: May 2008 Member Number: 63759 Location: La Porte Posts: 928	So you can run e85 mix in a stock SRT ?

09-15-2008, 01:58 PM	#12 (permalink)
NeonDan User Banned Join Date: Dec 2002 Member Number: 138 Location: TB Fl./GSP SC. Posts: 27,065	with bigger injectors than stock...yes on stock injectors you wouldnt have a enough fuel to run anything more than a 15-20% E85 to pump mix. The rule is to run e85 is that you need 20-30% larger injectors or use a conversion kit the car i posted about is running s2 injectors and s1 pcm but i need more injector given the mods. Car made 295whp/280wt @ 14psi on a 40% e85/60% pump mix....AFRs pegged in the 10s

09-16-2008, 12:53 AM	#13 (permalink)
reed32 SRTforums Member Join Date: Oct 2003 Member Number: 4648 Location: Pitts,CA Posts: 8,668	Quote: Originally Posted by ziggo0 So you can run e85 mix in a stock SRT ? no. the car will run to lean. ive tried it already and a/f's went 13's.. __________________ JnR Chase for 10's in norcal is on for DSP NEEDS PM only: Turbo66, Mindmelt,

09-16-2008, 12:57 AM	#14 (permalink)
reed32 SRTforums Member Join Date: Oct 2003 Member Number: 4648 Location: Pitts,CA Posts: 8,668	Quote: Originally Posted by NeonDan with bigger injectors than stock...yes on stock injectors you wouldnt have a enough fuel to run anything more than a 15-20% E85 to pump mix. The rule is to run e85 is that you need 20-30% larger injectors or use a conversion kit the car i posted about is running s2 injectors and s1 pcm but i need more injector given the mods. Car made 295whp/280wt @ 14psi on a 40% e85/60% pump mix....AFRs pegged in the 10s Dan tonight i took my shop car out and went to grab some e85. This car has HOM AND GUESS WHAT? HOM STAYED ON DURING ALL THE PULLS . 22 BUCKS TO FILL UP THE TANK WITH MY MIX TIRES LITE UP BAD __________________ JnR Chase for 10's in norcal is on for DSP NEEDS PM only: Turbo66, Mindmelt,

09-16-2008, 04:43 AM	#15 (permalink)
turbo666 Supporting Vendor (Gold) SRT of the Month Join Date: Mar 2005 Member Number: 25206 Location: Conover, NC Posts: 5,209	Go to Evo forums, LOTS of E85 info over there. I have a buddy with an Evo on E85 and he made 456 on Buscher's dyno on a FP Red. Another one with a 35R that made almost 600whp on just E85 at a local dyno, that thing will lite the tires up in 1st! They keep there afr's around 11.5, they tried 12.0 but stared getting knock. Some of the E85 guys are doing high compression builds now, like 10.0:1! That's crazy, but I know one guy made over 1000awhp with 10:1 and E85. If E85 was more prevalent in this area I'd switch to it, but only 1 station within 50 miles. __________________ Nigel 04 Srt-4-CHANGES UNDER WAY..., 10.75@132 w/2.0 60ft, First to go 10's on stock bottom! FIRST TO MAKE BIG TURBO PCM BOOST CONTROL WORK ON DIABLO! IN-HOUSE MUSTANG DYNO for your SRT-4 tuning needs For custom tuning, installs, and transmission rebuilds PM me! www.trudynosports.com

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode