Supporting Mods for E85 + exhaust question

[c63sss]

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Once I get my car back from warranty, I am looking to go stage 2 e85. I wont run E85 all the time, but will switch between 91 and E85. I want to have my car setup so that I know it will be bulletproof. So far, the mods I am planning on getting done is

-VTT crank hub with cbc
-BM3 ots e85 tune and a cary jordan tune later down the line
-charge pipes
-downpipes
-AA EL midpipe
-bmc filters

Is there anything else that I need to get done? And for the exhaust, is it possible to run a E85 tune on stock downpipes? I want to run the AA EL midpipe but with downpipes it seems that it sounds bad and has lots of drone. I might just have to give up on the EL and go with a single midpipe. TIA

[TouringM3]

Somebody is going to chime in with specifics on:
Supplemental fueling (if you're going to run full E85, to get the fuel volume you need)
Proper spark plugs

[tom @ eas]

Originally Posted by c63sss

Once I get my car back from warranty, I am looking to go stage 2 e85. I wont run E85 all the time, but will switch between 91 and E85. I want to have my car setup so that I know it will be bulletproof. So far, the mods I am planning on getting done is

-VTT crank hub with cbc
-BM3 ots e85 tune and a cary jordan tune later down the line
-charge pipes
-downpipes
-AA EL midpipe
-bmc filters

Is there anything else that I need to get done? And for the exhaust, is it possible to run a E85 tune on stock downpipes? I want to run the AA EL midpipe but with downpipes it seems that it sounds bad and has lots of drone. I might just have to give up on the EL and go with a single midpipe. TIA

Include the spark plugs like TouringM3 mentioned and you're there. We have nearly all those items in stock when ready and frequently tune with Cary on our dyno.

[TopJimmy]

Yes you can run Stage 2 on stock cats, including E85. The NGK plugs are a good idea, gapped to 0.021". You don't need fuel pumps or PI. Just realize sometimes you can run into a stuck injector when first tuning for E85, due to the higher fuel pressure needed, and adding top lube doesn't help.

[Wanted_M]

This is a must...
https://www.bendcalibration.com/shop...ilter-only-kit

[c63sss]

Thank you everyone, will get the spark plugs. A few more questions

-If an injector gets stuck, is that catastrophic for the motor?

-The shop doing the crank hub uses Motul 8100 X-Cess. Is that oil good or should I ask to swap it with a different one?

-Have any of you guys had trouble covering any repairs after a crank hub job? I am told it voids the warranty so just wondering.

Please let me know. Thanks!

[TopJimmy]

Originally Posted by c63sss

Thank you everyone, will get the spark plugs. A few more questions

-If an injector gets stuck, is that catastrophic for the motor?

-The shop doing the crank hub uses Motul 8100 X-Cess. Is that oil good or should I ask to swap it with a different one?

-Have any of you guys had trouble covering any repairs after a crank hub job? I am told it voids the warranty so just wondering.

Please let me know. Thanks!

If an injector gets stuck you stop immediately and have the car towed home or to your shop for fixing. I fixed mine DIY, no harder than a spark plug but slightly more involved.

Motul 8100 X-cess Gen2 is very good oil.

Once you tune your car the warranty is gone and you pay for fixes. Even if you flash back to stock BMW can tell.

[hellokitty]

1) BMW Flex Fuel plugs (NGK F8S) gapped to .020

2) Run a top lube with E85 like Hot Shots LX4. 1 oz per 10 gallons of E85 to avoid injector issues.

3) Bend Calibration flex fuel filter

4) Run a full tank of pump gas every 1,500 miles of E85 use to keep fuel system happy.

5) Cut oil change interval in half when running on E85 due to fuel dilution. Run a 5w-40 with high HTHS.

[c63sss]

Thank you, everyone, definitely will be getting everything you guys recommend. Also regarding the injectors, is getting stuck something that happens only when first tuning or just something I should always be wary of? Thanks

[TopJimmy]

Originally Posted by c63sss

Thank you, everyone, definitely will be getting everything you guys recommend. Also regarding the injectors, is getting stuck something that happens only when first tuning or just something I should always be wary of? Thanks

Usually when first tuning if it happens. It can happen later (months) but that's more rare. They don't stick, they break, which would typically happen the first few times they run past normal limit.

[theweebabySeamus]

Originally Posted by TopJimmy

If an injector gets stuck you stop immediately and have the car towed home or to your shop for fixing. I fixed mine DIY, no harder than a spark plug but slightly more involved.

Motul 8100 X-cess Gen2 is very good oil.

Once you tune your car the warranty is gone and you pay for fixes. Even if you flash back to stock BMW can tell.

+1 to all this, would add that you can lose an engine to injector failure, just seems to be less common, especially if you shut down ASAP like TopJimmy did.

[c63sss]

Originally Posted by theweebabySeamus

+1 to all this, would add that you can lose an engine to injector failure, just seems to be less common, especially if you shut down ASAP like TopJimmy did.

Yea when I had the c63 most people who got stuck injectors usually blew their motors so good to know that it's still preventable.