LT1-LT4 Modifications 1993-97 Gen II Small Block V8

E-85 383 LT1 Questions?

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Old 06-02-2011, 02:49 PM
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if u do it you should buy my 48lb/hr injectors lol
Old 06-02-2011, 04:01 PM
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no buy my 60s!
Old 06-02-2011, 04:15 PM
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at a relitivly low 10.5 to 1 you can just put in 4 or five gallons of e85 and top it of with regular unleaded 87 no mods needed will still net you a few ponies save a few bux and not a bad hit on MPG ether . you will need higher compression or forced induction to take full advantage of e85.
Old 06-02-2011, 07:35 PM
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Originally Posted by fuzchunk
at a relitivly low 10.5 to 1 you can just put in 4 or five gallons of e85 and top it of with regular unleaded 87 no mods needed will still net you a few ponies save a few bux and not a bad hit on MPG ether . you will need higher compression or forced induction to take full advantage of e85.
Umm... no. E85 has a different stoich than regular gasoline.. that would be a bad idea.
Old 06-03-2011, 09:54 AM
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Originally Posted by nitrous2fast
Umm... no. E85 has a different stoich than regular gasoline.. that would be a bad idea.
Do you know what E85 stands for?
Old 06-03-2011, 11:22 AM
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Originally Posted by quik95lt1
if u do it you should buy my 48lb/hr injectors lol

Originally Posted by Wicked94Z
no buy my 60s!

Got you both beat, He needs to buy my 75"s
Old 06-03-2011, 01:04 PM
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Originally Posted by 05HD
Do you know what E85 stands for?
If you just asked me that question, and you did, you obviously haven't done any research on what E85 is....
Old 06-03-2011, 01:33 PM
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Originally Posted by BLINGOLE
First off WOW e85 is cheap by you, i just paid 3.66 a gallon here in central florida.

now e85 isnt easy to get where im at so im kinda hating having to alwasy worry about running low on fuel on trips but for power/durabilty i love it. For a everyday driver i hate it. If your not a high compression big hp guy i would just stick to 93 and make it simple.

dont know if i helped you any but ya there ya go
e85 is $3.45 here in Tallahassee, which is frustrating because I paid $3.20 in Orlando. To compound on BLINGOLE's post regarding the availability of e85:

In Florida it is pretty limited, there are only 4 stations between Tallahassee and Orlando. The other constraint is that "e85" can mean anywhere between 70% Ethanol and 85% Ethanol. Different stations use different suppliers, and as a result can have different mixes.

I recently took a road trip down to Orlando to have access to an AWD Dyno, and had to continue adding fuel to my tune as I continued to move south. My OL Fueling Map required almost 10% additional fuel on the big end by the time I got my car on the dyno. It is definitely a practice in patience, because if you fuel up with e85 from multiple stations, you will be adding random variables unless you feel like testing the ethanol content each time you fill up.

Originally Posted by nitrous2fast
Umm... no. E85 has a different stoich than regular gasoline.. that would be a bad idea.
It has a "different stoich" in relation to pump gas, but it is still 1.0 Lambda, which is read on most widebands. It can be 1.0 Lambda from ethanol, gasoline, used fryer oil or bud light.

To the OP: I will echo everyone else's feelings regarding not being able to really see the gains that e85 offers with your current setup. e85 burns cooler in the combustion chamber, has cooler EGTs, and is less likely to detonate. That is what allows you to run more timing (which creates more torque).

Switch to forced induction, and that is where the addition of e85 will shine. I am able to run 25 psi on my turbo car, versus 18 psi on pump gas.

I don't have much experience with tuning e85 on N/A cars, let alone anything but opposed-4 cylinders anymore, but I don't feel the ends justify the means in this case.
Unless you tune yourself, you are looking at the cost of tuning, injectors and fuel pump at the very least.
Old 06-03-2011, 08:34 PM
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Originally Posted by WhyHelloOfficer
It has a "different stoich" in relation to pump gas, but it is still 1.0 Lambda, which is read on most widebands. It can be 1.0 Lambda from ethanol, gasoline, used fryer oil or bud light.

.
Well yeah! Perfect lambda is the same for any fuel used. But for most cars they don't calculated fueling based on lambda, they do it on the good ole A/F ratio of gasoline.

adding E85 isn't the same as dumping 112 octane race fuel in. if it was then you could just go to the pump and fill up with E85 and be just fine, which isn't the case. lol

14.7/1 for E85 is very LEAN.
Old 06-03-2011, 10:45 PM
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Originally Posted by moehorsepower
Got you both beat, He needs to buy my 75"s
how much you want for the 75s? What make are they?
Old 06-04-2011, 02:19 PM
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Thank you sirs for the help on this Think Ill be be doing something else then
Old 06-04-2011, 05:48 PM
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Nitrous2fast, the answer (you declined to answer) is that E85 stands for 85% ethanol and.... 15% GASOLINE!!!!

So, explain to all of us ignorant fools how mixing in more gasoline is going to cause problems with stoiciometry oh mighty one.
Old 06-05-2011, 02:43 PM
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Originally Posted by 05HD
Nitrous2fast, the answer (you declined to answer) is that E85 stands for 85% ethanol and.... 15% GASOLINE!!!!

So, explain to all of us ignorant fools how mixing in more gasoline is going to cause problems with stoiciometry oh mighty one.
The stoich of E85 is 9.87/1. Which is a lot different than the 14.7/1 of gasoline.
so even if the computer ran the mixture at 11.0/1 with a tank full of E85 you might as well kiss that nice engine you just built good bye...

If it was as easy as just filling up with E85, everyone would do it... oh mighty one!!!

Oh and its not about mixing in more gasoline it's the large amounts of Ethanol.
Old 06-05-2011, 02:52 PM
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im swapping my 383 lt1 to E-85 right now.

im 11.3:1.... but im boosted.
Old 06-05-2011, 02:57 PM
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Originally Posted by forgedlt4
im swapping my 383 lt1 to E-85 right now.

im 11.3:1.... but im boosted.
I hope you are talking about SCR when you say 11.3:1....

11.3:1 A/F running E85 is super lean especially for a boosted vehicle.
Old 06-06-2011, 05:17 PM
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if he's reading a gasoline scaled wideband...

1.00 lambda = 14.7:1

and 11.3:1 is .77 lambda, or 7.47:1 actual A/F which is about right. Very few folks out there run an E85 scaled wideband
Old 06-06-2011, 09:51 PM
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Originally Posted by nitrous2fast
The stoich of E85 is 9.87/1. Which is a lot different than the 14.7/1 of gasoline.
so even if the computer ran the mixture at 11.0/1 with a tank full of E85 you might as well kiss that nice engine you just built good bye...

If it was as easy as just filling up with E85, everyone would do it... oh mighty one!!!

Oh and its not about mixing in more gasoline it's the large amounts of Ethanol.
If you are attempting to state that you can't run E85 without a re-tune on an LT1 platform, you have picked a very peculiar and roundabout way to post that.

Otherwise, you are a blithering fool. Lambda is Lambda, no matter what the mixture of gasoline and ethanol. Lambda is also what your OXYGEN sensors read, no matter the scale they are calibrated to translate A:F into.
Old 06-07-2011, 06:10 AM
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Originally Posted by Wicked94Z
if he's reading a gasoline scaled wideband...

1.00 lambda = 14.7:1

and 11.3:1 is .77 lambda, or 7.47:1 actual A/F which is about right. Very few folks out there run an E85 scaled wideband
That is true...

I just don't want some moron telling people that its ok to put E85 in their vehicles that are tuned to run on normal pump gas.



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