[papaman1234]

Hey guys,
Looking to do full e85 in my g80. So far I have a fuel it sensor/downpipes and midpipe running e40. I know I need port injection kit and a lpfp. Do I need anything else on bootmod3?

[TopJimmy]

Consider using a secondary fuel system for your PI instead of trying to piggyback on the existing LPFP line. This way you avoid surge and oscillation by your primary fuel pump. I suggest Injector Dynamics injectors.

[papaman1234]

Originally Posted by TopJimmy

Consider using a secondary fuel system for your PI instead of trying to piggyback on the existing LPFP line. This way you avoid surge and oscillation by your primary fuel pump. I suggest Injector Dynamics injectors.

What parts do you reccomend?

[mike@x-ph.com]

You dont need port injection to run 100% E85.

the Flex-fuel kit and the Bootdmod3 multimap is enough

[chris3g]

if you want to run PI on BM3 you should strongly consider waiting for the release of the Rev2 board and customROM V2, which is supposed to be released this quarter. Currently bootmod3 does not support integrated PI control. You need a separate PI controller (usually the motiv reflex) and that controller will run a separate flash which you will need someone to tune for you, and the reflex and the main ECU do not communicate with each other.

[Impulse20098]

Originally Posted by mike@x-ph.com

You dont need port injection to run 100% E85.

the Flex-fuel kit and the Bootdmod3 multimap is enough

You should probably be more specific. While yes you can then run full e85, you can not make full power due to not having enough fuel delivery. The car will have to be turned down whether it be PSI or timing or a combination of both in order to not run out of fuel all the way to redline.

Or else I would be running full e85 instead of the e50 mix I'm currently on.

[TopJimmy]

Originally Posted by Impulse20098

You should probably be more specific. While yes you can then run full e85, you can not make full power due to not having enough fuel delivery. The car will have to be turned down whether it be PSI or timing or a combination of both in order to not run out of fuel all the way to redline.

Or else I would be running full e85 instead of the e50 mix I'm currently on.

+1 on this. Paul says E45-50 is the max for stock fuel system without dialing things back.

[mike@x-ph.com]

Originally Posted by Impulse20098

You should probably be more specific. While yes you can then run full e85, you can not make full power due to not having enough fuel delivery. The car will have to be turned down whether it be PSI or timing or a combination of both in order to not run out of fuel all the way to redline.

Or else I would be running full e85 instead of the e50 mix I'm currently on.

Power-wise, it maxes out at ~E50

[Maximus_]

Originally Posted by mike@x-ph.com

Power-wise, it maxes out at ~E50

It doesn't make any sense. Are you saying you can't make more power above E50?

[GolfCoyote]

Originally Posted by Maximus_

It doesn't make any sense. Are you saying you can't make more power above E50?

You can but you need more fueling to do it.

Correct me if I'm wrong but E has less energy potential which is why it requires more of it VS gas. The more E you run the bigger injector or higher flowing fuel pumps you will need.

E50 is the limit here because of the cars fueling limitations. With upgraded fueling skies the limit.

[mike@x-ph.com]

Originally Posted by Maximus_

It doesn't make any sense. Are you saying you can't make more power above E50?

if you are not upgrading the fueling system, you will make the same power on E50 and 100% E85

[chris3g]

Not at a safe afr you won’t. There’s a reason why people with DI-only are running e50, possibly e60 max and not just filling up with e85, which for most people would be much easier than dealing with blending. The additional fuel volume required to run e85 means you need to make less power and any tuner that cares about you not blowing up your car is going to start turning down the flex blend factors once you exceed whatever they have deemed their safe maximum to be.

[Impulse20098]

Originally Posted by mike@x-ph.com

if you are not upgrading the fueling system, you will make the same power on E50 and 100% E85

This is incorrect. You will run out of fuel running 100% e85 on stock fuel system trying to make the same power as e50.

[mike@x-ph.com]

Originally Posted by chris3g

Not at a safe afr you won’t. There’s a reason why people with DI-only are running e50, possibly e60 max and not just filling up with e85, which for most people would be much easier than dealing with blending. The additional fuel volume required to run e85 means you need to make less power and any tuner that cares about you not blowing up your car is going to start turning down the flex blend factors once you exceed whatever they have deemed their safe maximum to be.

Originally Posted by Impulse20098

This is incorrect. You will run out of fuel running 100% e85 on stock fuel system trying to make the same power as e50.

Per my conversation with PTF, that's not true.

They told me I could do 100% e85 on their multi-map, which would max out an E50 level.

Also Jordan Tuning does custom maps with 100% E85, these maps make less power than his custom E60 map because of the fuel limitation but its safe to run them at that power level per Jordan.

[papaman1234]

Originally Posted by chris3g

Not at a safe afr you won’t. There’s a reason why people with DI-only are running e50, possibly e60 max and not just filling up with e85, which for most people would be much easier than dealing with blending. The additional fuel volume required to run e85 means you need to make less power and any tuner that cares about you not blowing up your car is going to start turning down the flex blend factors once you exceed whatever they have deemed their safe maximum to be.

So basically it’s not worth upgrading to full E even with upgraded fuel parts? I’m running bootmod3.

[chris3g]

Originally Posted by mike@x-ph.com

Per my conversation with PTF, that's not true.

They told me I could do 100% e85 on their multi-map, which would max out an E50 level.

Also Jordan Tuning does custom maps with 100% E85, these maps make less power than his custom E60 map because of the fuel limitation but its safe to run them at that power level per Jordan.

the OTS multimap probably does make the same power on E85, because it is a conservative calibration and there is still headroom left in the fuel system on E50. However when you are running maxxed out on E50, as most with a custom tune will be, you need approximately 15% more fuel to make the same power at the same AFR on E85, and that extra fuel doesnt exist because you have already maxed out the system on E50.

[Impulse20098]

Originally Posted by chris3g

the OTS multimap probably does make the same power on E85, because it is a conservative calibration and there is still headroom left in the fuel system on E50. However when you are running maxxed out on E50, as most with a custom tune will be, you need approximately 15% more fuel to make the same power at the same AFR on E85, and that extra fuel doesnt exist because you have already maxed out the system on E50.

This exactly.

[hellcat2m4]

Originally Posted by mike@x-ph.com

Per my conversation with PTF, that's not true.

They told me I could do 100% e85 on their multi-map, which would max out an E50 level.

Also Jordan Tuning does custom maps with 100% E85, these maps make less power than his custom E60 map because of the fuel limitation but its safe to run them at that power level per Jordan.

I cant imagine how slow that custom map on e85 is if its slower then his custom e50-60 which is the same as the OTS E50 that comes with BM3.

Must be E30 OTS power levels on full E.

[eric97h]

Originally Posted by hellcat2m4

I cant imagine how slow that custom map on e85 is if its slower then his custom e50-60 which is the same as the OTS E50 that comes with BM3.

Must be E30 OTS power levels on full E.

LMao his custom map is same power as the off the shelf map?

[hellcat2m4]

Originally Posted by eric97h

LMao his custom map is same power as the off the shelf map?

Yep, confirmed by three people now with dragy data.

[Maximus_]

Originally Posted by chris3g

the OTS multimap probably does make the same power on E85, because it is a conservative calibration and there is still headroom left in the fuel system on E50. However when you are running maxxed out on E50, as most with a custom tune will be, you need approximately 15% more fuel to make the same power at the same AFR on E85, and that extra fuel doesnt exist because you have already maxed out the system on E50.

I am maxed out stock fuel system tuned for E60. Darrel who was setting records was tuned for E64. So E50 is not maxed out.

[Impulse20098]

Originally Posted by Maximus_

I am maxed out stock fuel system tuned for E60. Darrel who was setting records was tuned for E64. So E50 is not maxed out.

Darrel also grenaded his motor.

More to the point, he was saying in reference to the full e85 on stock fueling. Most tuners stop around e50 ish to keep it a little on the safer side of things.

Of course some cars will be different and some people want to push more than others.