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BMW 3-Series (E90 E92) Forum > BMW E90/E92/E93 3-series General Forums > General E90 Sedan / E91 Wagon / E92 Coupe / E93 Cabrio > Running e85 on stock fuel pump and injectors.



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      09-01-2018, 11:53 AM   #1
ufokinwot
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Running e85 on stock fuel pump and injectors.

Hey guys I have a question. I have a 2011 BMW 335is with the following mods; Catless Downpipes, dual cone intakes, TiAL Q blow off valve, upgraded charge pipe, front mount intercooler, and MHD E50 tune.

I have not upgraded the fuel pump or injectors and I have been running 8 gallons e85 and 8 gallons 91 without any issues. I am friends with the previous owner and he did not touch the fuel pump or injectors either. Car pulls super hard and shows no signs of failing anything. Anybody else getting away with this? I have probably done 30k+ miles while using e85.
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      09-01-2018, 04:19 PM   #2
catcher22
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I ran 5-6 gals of E85 and 93 about once a month/every other month for years on index 9 injectors and the stock pump without a hiccup

now have index 12 injectors and still fine
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      09-01-2018, 04:33 PM   #3
LMB335IS
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Originally Posted by ufokinwot View Post
Hey guys I have a question. I have a 2011 BMW 335is with the following mods; Catless Downpipes, dual cone intakes, TiAL Q blow off valve, upgraded charge pipe, front mount intercooler, and MHD E50 tune.

I have not upgraded the fuel pump or injectors and I have been running 8 gallons e85 and 8 gallons 91 without any issues. I am friends with the previous owner and he did not touch the fuel pump or injectors either. Car pulls super hard and shows no signs of failing anything. Anybody else getting away with this? I have probably done 30k+ miles while using e85.
Do you log your car regularly? That's the only way to know if you're "getting away" with it. You have no way of knowing if you're running your LPFP and/or HPFP into the ground if you don't or if anything else is being affected.

Do you know the actual E content of the E85 you use by way of testing a sample or a inline E content sensor or are you just guessing?
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      09-01-2018, 04:58 PM   #4
BravoJohny33
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Why waste your money on 93 octane if you are mixing it with e85? e85 boosts the octane anyway so just increase your e85 ratio to 87 octane.
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