JB4 Custom Fuel Wire Harness

[dareckibmw]

Where is the next batch? put me on the list, please, lol

 

[Koreandude]

Received today, installed tonight, did some pulls, reviewed the datalogs and everything is working great. Thanks for making these! Truly plug 'n play now and good quality!

 

[JVsGT]

Received today, installed tonight, did some pulls, reviewed the datalogs and everything is working great. Thanks for making these! Truly plug 'n play now and good quality!

What map did you use for the pulls? Had the JB4 installed for a week now just waiting on the fuel wires until I got the PnP harness. Looks like I'll be removing the piggyback tho since I need to take the vehicle in for brake vibration.

 

[oddball]

Got mine yesterday as well, look excellent. Thanks!

 

[ecko04]

NOVEMBER BATCH

I’m taking names for the November batch, which will be the last batch for 2019.

If there’s continued interest, I’ll begin taking names for the February batch in mid-January.

 

[Soulection]

@ecko04 Haven’t received mine. Can I get the tracking number please, would really appreciate it.

 

[ecko04]

@ecko04 Haven’t received mine. Can I get the tracking number please, would really appreciate it.

The tracking number was sent to you in a PM on October 17th.

 

[Leslie Lim]

Received today, installed tonight, did some pulls, reviewed the datalogs and everything is working great. Thanks for making these! Truly plug 'n play now and good quality!

Can share some pictures on the installation

 

[ecko04]

Can share some pictures on the installation

Did you look at the first post of the thread? Like the very first one with the video?

 

[Koreandude]

What map did you use for the pulls? Had the JB4 installed for a week now just waiting on the fuel wires until I got the PnP harness. Looks like I'll be removing the piggyback tho since I need to take the vehicle in for brake vibration.

I always use Map 2. My 'engine' mods are BMS Intakes and Denso plugs, running 93 octane. I'm not sure if I could run Map 3 on 93. I'd probably have to go E30 or drop in an octane booster for that. But Map 2 was solid before and after the fuel wires. I'd probably need a dyno to tell the difference in power. If anything, from what I've discovered on the N54 forums, fuel wires are necessary if you want to run Map 3 or higher, otherwise Terry says it would run too rich w/o the fuel wires.

I want to run E30 (I've had the app for weeks to calculate 93oct/E85 ratios) but I'm still trying to determine if it's "long term" safe to run that high of ethanol. I don't want to cause damage that i'd see 8-10 years from now. I hold on to my cars.

Can share some pictures on the installation

Just like Ecko said, check the first post for install instructions. The harness is literally plug 'n play on the O2 sensors and connecting the fuel wires with the solder sleeve is pretty straight forward if you're familiar with working on electronics. Just remember to slide your heat shrink tubing on the wire first. There is no undoing the solder sleeve once it's set.

 

[ecko04]

I want to run E30 (I've had the app for weeks to calculate 93oct/E85 ratios) but I'm still trying to determine if it's "long term" safe to run that high of ethanol. I don't want to cause damage that i'd see 8-10 years from now. I hold on to my cars.

E30 isn’t a high ethanol mixture and will cause no harm to anything.

The apps that are available for calculating ethanol levels are good, but I use an ethanol sensor. It’s really the only way to know exactly what’s in the tank. The apps don’t account for the residual fuel that’s in the tank and that most pump gas already contains E10. When I see what the app says, I generally calculate down about a gallon of ethanol and I’m usually spot on between E28 and E30. Had I done what a lot of folks are doing by just dumping 5 gallons of ethanol in the tank and filling the remaining with pump gas, it would be closer to E35-E38. There’s really no substitute for the sensor which is telling you exactly what’s going into the injectors.

 

[Mr Teflon]

NOVEMBER BATCH

I’m taking names for the November batch, which will be the last batch for 2019.

If there’s continued interest, I’ll begin taking names for the February batch in mid-January.

I'd like to get in on the November batch!

 

[Julien]

I would like to order one also!

 

[ecko04]

I’ve only gotten interest from about 3 folks for the November batch. Unfortunately, it’s not cost effective to source parts in that low quantity. I’ll have to skip November’s batch.

 

[Koreandude]

E30 isn’t a high ethanol mixture and will cause no harm to anything.

The apps that are available for calculating ethanol levels are good, but I use an ethanol sensor. It’s really the only way to know exactly what’s in the tank. The apps don’t account for the residual fuel that’s in the tank and that most pump gas already contains E10. When I see what the app says, I generally calculate down about a gallon of ethanol and I’m usually spot on between E28 and E30. Had I done what a lot of folks are doing by just dumping 5 gallons of ethanol in the tank and filling the remaining with pump gas, it would be closer to E35-E38. There’s really no substitute for the sensor which is telling you exactly what’s going into the injectors.

Actually the app does have a section to account for remaining fuel and it's current ethanol mix. But like you said, having a sensor to determine the actual ethanol content is best. I'll look into the sensor if I decide to start mixing.

 

[ecko04]

Actually the app does have a section to account for remaining fuel and it's current ethanol mix. But like you said, having a sensor to determine the actual ethanol content is best. I'll look into the sensor if I decide to start mixing.

You misunderstood what I said.

Yes, the app has you enter your current fuel level, current ethanol content, and desired ethanol content. However, the tank is not a whole number and the Fuel-It app only takes whole numbers, which inherently throws the refill amount off. Also, when entering the current fuel level it’s also off due to residual fuel in the tank. The gauge is not an accurate representation of the amount of fuel remaining as we aren’t able to refill to 100% of the tank capacity.

Additionally, the app does not take into consideration that you’re refilling ~E10, at most gas stations in the states, as opposed to E0. So the estimates from the app for refill of E85 to reach a desired level, from my experiences, is too high because you already have E10 from the regular pump gas.

 

[Koreandude]

You misunderstood what I said.

Yes, the app has you enter your current fuel level, current ethanol content, and desired ethanol content. However, the tank is not a whole number and the Fuel-It app only takes whole numbers, which inherently throws the refill amount off.

Yup, that's absolutely right. But the thing is, I'm not using "Fuel-It" (I've never installed it). What I have is "E85 Blend", which appears to address all those short comings you mentioned in the other app.

Also, when entering the current fuel level it’s also off due to residual fuel in the tank. The gauge is not an accurate representation of the amount of fuel remaining as we aren’t able to refill to 100% of the tank capacity.

True, but exactly what is the margin of error on the gauge? Besides, extrapolating the ratio with the aid of an app that addresses all variables in addition to an ethanol content sensor, it's probably not that big a deal and the gauge error is easily overcome. I think having that sensor confirming what's going into the engine is key if one wants to be most accurate.

Additionally, the app does not take into consideration that you’re refilling ~E10, at most gas stations in the states, as opposed to E0. So the estimates from the app for refill of E85 to reach a desired level, from my experiences, is too high because you already have E10 from the regular pump gas.

"Fuel-It" might not, but "E85 Blend" does have this provision.

 

[ecko04]

It’s a big deal if you want an accurate representation of ethanol content. When the fuel gauge should about 2 miles to empty there’s an additional bit still in the tank, how much? Who knows. But continuous refills of ethanol do nothing but raise the ethanol content of that remaining bit of gas.

I guess that’s before we get into what the actual level of ethanol is that’s being disbursed by the pump. When dumping 5 gallons of actual E85 into the tank and refilling the remainder with pump gas, the ethanol content is around E35. Does it matter? Probably not for a while and if one does it at each fill up.

I would think that most people using the Fuel-It ethanol sensor would also use the Fuel-It app since there’s a 0-5v tie-in to the JB4 to provide live ethanol content in the JB4 app and in the logs.

 

[Koreandude]

It’s a big deal if you want an accurate representation of ethanol content. When the fuel gauge should about 2 miles to empty there’s an additional bit still in the tank, how much? Who knows. But continuous refills of ethanol do nothing but raise the ethanol content of that remaining bit of gas.

I guess that’s before we get into what the actual level of ethanol is that’s being disbursed by the pump. When dumping 5 gallons of actual E85 into the tank and refilling the remainder with pump gas, the ethanol content is around E35. Does it matter? Probably not for a while and if one does it at each fill up.

I would think that most people using the Fuel-It ethanol sensor would also use the Fuel-It app since there’s a 0-5v tie-in to the JB4 to provide live ethanol content in the JB4 app and in the logs.

Ok, so i'm confused then. If this is a slippery slope into unreliable fueling, are you saying there just simply no way to accurately fuel one's vehicle consistently to E30 by blending E10 with E85 even with the ethanol sensor integrated with the JB4 running Fuel-It as well as addtional E85 apps to aid in calculation? lol....

Besides, isn't the "low fuel light" programmed to illuminate at a very specific volume of gas remaining? That would be one indication of remaining fuel, no? I haven't tested exactly how much gas is actually left yet when that light comes on, but consistently re-fueling with-in a mile of that light turning on, then subtracting that amount with the tank capacity should give you what you had remaining. Do this a few times and I think you'll at least have one reliable piece of info on fuel levels.

 

[Koreandude]

Besides, I think we may be splitting hairs here anyways. lol.