Please Do Not Run E-85 on Stock Injectors.

[Terminator2]

what is your "EQ RATIO ERROR" at your max injector DC

Not sure I had my stoich set a tad too rich but nothing massive about 3%. I had it at 9.78 vs 9.87. Fuel trims are within 1-2% now same 70% IDC currently. LU47s flow about 30% more than stock so it's all in line.

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[DarkestHour]

How about you check with Lund before making such claims?

 

[stoli]

15,000 miles on e85/Flex, 1,000+ miles on road course with long periods at 5000+ rpm and all good. Long tubes, Steeda intake (some of the time)...

 

[Need4Speed15]

Someone with a Lund flex tune on stock injectors and full E-85 please post up screen shots of max IDC in your logs.

Dont forget Livernois also does FF tunes using the stock injectors.

 

[WhiteyDog]

Guys, I wish I knew what the H*LL you were talking about with all this tuning talk, so since I don't know, I wanna ask this: With the mods in my sig, would it benefit a guy like me to get the 47lb injectors, but NOT go with E85? Lund had never said I would need to go with them with my mods, but they also said some time back that I wouldn't need them to go with E85 with my mods. (I see that that has changed). And I'm not bashing Lund here at all guys, my 93 tune from them and their customer service have been super, car runs strong and smooth, no complaints.

 

[markmurfie]

How much have you modified your open valve injection criteria? I know stock it takes a lot to meet the criteria and get into OVI, aside from at idle where ford does some tricky splitting OVI/CVI for emissions. Ideally you want to inject on the closed valve, as it will evaporate the fuel, but If you are needing more fuel its more important to just keep the fuel spraying.

Also the stock DC limit is 199% for non flex fuel and 200% for flex fuel.

 

[Terminator2]

How much have you modified your open valve injection criteria? I know stock it takes a lot to meet the criteria and get into OVI, aside from at idle where ford does some tricky splitting OVI/CVI for emissions. Ideally you want to inject on the closed valve, as it will evaporate the fuel, but If you are needing more fuel its more important to just keep the fuel spraying.

Also the stock DC limit is 199% for non flex fuel and 200% for flex fuel.

I haven't and I don't want fuel spraying when the valves are open at wide open throttle. 200% is the ECM limit in the tune but injectors go static at 100% they are maxed out at that point.

 

[Terminator2]

How about you check with Lund before making such claims?

This forum is something else. I put this thread up to inform people that it's a bad idea to run stock injectors on E-85 due to strong possibility of maxing them out and possible engine failure that could result due to the car running lean. Many of you are close to disaster and don't even know it but hey if you want to risk your $7000 engine over a $250 set of injectors your tuner said you didn't need that's on you.
It's funny I put evidence up to show that the stock injectors are maxed out on E-85 but just because some of the big tuners says its ok I'm wrong even though no one has posted any empirical evidence to support their claims.

 

[Terminator2]

Guys, I wish I knew what the H*LL you were talking about with all this tuning talk, so since I don't know, I wanna ask this: With the mods in my sig, would it benefit a guy like me to get the 47lb injectors, but NOT go with E85? Lund had never said I would need to go with them with my mods, but they also said some time back that I wouldn't need them to go with E85 with my mods. (I see that that has changed). And I'm not bashing Lund here at all guys, my 93 tune from them and their customer service have been super, car runs strong and smooth, no complaints.

On just 93 not 100% necessary however since you are about 70whp over stock it wouldn't hurt. If you went to run E-85 you absolutely need them. My car runs stronger and smoother now on the same tune with the reduced injector pulse widths.

 

[Niz55]

that's why i upgraded to 47lbs when i did my gt350 manny. I mean for $200 you have no excuse not to do it. My car runs like a champ (knock on wood).

 

[Agent_S550]

I had a feeling duty cycle was high on stock injectors with E85. Ford usually sizes their injectors for the power of the motor with a comfortable buffer. But by no means do they have any comfort post an additional 25% duty taxing from E85. I'm sure they work, but undersized injectors are not your friend.

 

[WhiteyDog]

On just 93 not 100% necessary however since you are about 70whp over stock it wouldn't hurt. If you went to run E-85 you absolutely need them. My car runs stronger and smoother now on the same tune with the reduced injector pulse widths.

Okay. Thanks for your response.

 

[Terminator2]

Dont forget Livernois also does FF tunes using the stock injectors.

I didn't know that thanks for the info.

 

[Terminator2]

15,000 miles on e85/Flex, 1,000+ miles on road course with long periods at 5000+ rpm and all good. Long tubes, Steeda intake (some of the time)...

Likely right in the edge though. I'd upgrade the injectors just for peace of mind.

 

[wireeater]

My question is, why are no tuners being tagged or chiming in on here to either agree or disagree.

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