Flex fuel tune check engine

[ChitownStang]

Talked to Lund, looks like they also offer a Flex tune now. they are the most expensive for sure.
I also have been talking to DRP Motorsports. Seems like they have really figured out the Flex tune with some extra programming outside of what HP tuners has.
From what I understand, they are using Flex tables from F150.
I like the price and the smaller shop attention, focus on Flex that he has.
Can't find anything bad about them, even though there isn't much.

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[Abilor]

I see everything I would see from a gen3 file now in the gen4.

Deeply encouraging...

 

[Abilor]

I meant with mustangs. You said you were guessing that a real e content sensor wasn’t being used and this was correct because as I said , nobody uses them. Not on mustangs. They can’t be pinned in like on GM cars. Yes I’ve tuned several Camaros with the real e sensor added and the PCM will get real time data on the ethanol content. That’s not possible with the mustang. At least not the gen4. Gen3 with PCMtec I believe can pin in a sensor and do a real deal flex tune.

Glad I'm not crazy that I haven't seen any Flex Fuel Sensor Kits aside from this one, which has shady reviews.

Theoretically, though, couldn't a 5V signal out of a Fuel/Alcohol sensor into an OBDII add-on like an AEM wideband feeding into a tune be used to properly manage flex-fuel in real-time at the tune level? I'm actually surprised this product doesn't exist yet from reputable vendors.

That said, the heavens parted the other day: I have won a small side contract and, my wife is cool with using the revenue to get a supercharger; if alcohol isn't recommended for them (thought it was?), then I don't need to keep on checking for decent flex fuel solutions...

 

[robvas]

Glad I'm not crazy that I haven't seen any Flex Fuel Sensor Kits aside from this one, which has shady reviews.

Theoretically, though, couldn't a 5V signal out of a Fuel/Alcohol sensor into an OBDII add-on like an AEM wideband feeding into a tune be used to properly manage flex-fuel in real-time at the tune level? I'm actually surprised this product doesn't exist yet from reputable vendors.

That said, the heavens parted the other day: I have won a small side contract and, my wife is cool with using the revenue to get a supercharger; if alcohol isn't recommended for them (thought it was?), then I don't need to keep on checking for decent flex fuel solutions...

You need pcmtec to use that sensor, so it's a matter of if/when that comes to the S650, the S550 guys have been doing it

https://www.mustang6g.com/forums/th...ased-flex-fuel-install-guide-write-up.196922/

And as far as Flex fuel on a boosted car goes...talk to your tuner. Most won't do it.

 

[Abilor]

You need pcmtec to use that sensor, so it's a matter of if/when that comes to the S650, the S550 guys have been doing it

https://www.mustang6g.com/forums/th...ased-flex-fuel-install-guide-write-up.196922/

And as far as Flex fuel on a boosted car goes...talk to your tuner. Most won't do it.

Count. Me. Out.

Too little overhead for injectors already stretched.

You boys enjoy.

 

[ZXMustang]

Count. Me. Out.

Too little overhead for injectors already stretched.

You boys enjoy.

You’re so completely wrong it’s silly. You have both DI and PI fuel systems lol. And even on full e85, you still have a consistently observed 40-50% overhead when only warm blending in 10% PI injection. You still have a tremendous amount. Of NA headroom to run full e85, and it’s been this way since the 2018+ cars through today. You really need to do a bit of research. Unless you are thinking about the gen 1/2 cars then you’d be right. But not on gen3/4. This is proven.

 

[Gojiras breath]

Flex fuel tune vs e85 tune seems to be confusing people. Both can run e85. Flex fuel sniffs the exhaust and makes changes based on the sniff. It can adjust to a mixed blend in time. I can see a tuner not wanting to tune this on a supercharger. At least without a warning not to punch on it till the computer learned the level.
An e85 tune is tuned for it. It will give extra power over 93 octane. No wait, just gotta have undiluted e85 in the tank.
My focus rs just got tuned for e85. Wow on just the price. E85 was $1.64. 93 premium was $3.89. Thats a measurable savings even with 20% worse gas mileage.

 

[DarkMatterGrey]

my wife is cool with using the revenue to get a supercharger; if alcohol isn't recommended for them (thought it was?), then I don't need to keep on checking for decent flex fuel solutions...

There's a bunch of write ups for superchargers with a stock tune running E30, which is preferred.

I would like to run E30 just stock (without a supercharger or a tune). But for me even E30 is too hard to make or too expensive to buy (Arizona gas options suck). So I'll stick to my hand blended 93+ (3.5*100 + 12.5*91) at $5+ per gallon.

 

[So0_NaSTy]

I’ve run up to borderline E50, completely stock tune with no issues. Very odd.

 

[robvas]

My focus rs just got tuned for e85. Wow on just the price. E85 was $1.64. 93 premium was $3.89. Thats a measurable savings even with 20% worse gas mileage.

some states have a bigger difference than others.

In Michigan here's the current price:

87 - $2.80
93 - $3.60
E85 - $2.55

 

[ZXMustang]

I’ve run up to borderline E50, completely stock tune with no issues. Very odd.

In my opinion thats pushing the fuel trims way too far. I'd need to see a WOT log, but I can imagine you are approaching the limits of the fuel trims. And once you hit that wall, thats when you'll actually run lean and have problems. Or not. Maybe the bit of lean out you get might add a bit of HP. The term "lean is mean" comes to mind, but only until it isnt. The fastest pass a car will ever make is a few milliseconds before it blows up.

And not to get the paddle out on you, but the point of running an e blend with these is to allow the car to add as much spark as it wants in the absence of knock. Which I believe you are way past that threshold with e30 let alone e50. Pushing the blend that high isnt going to get you anything past what I would consider a max of e40 would get you. No need to go that far.

Now if you get a tune and we can change the stoich to match e50, then you are back at 0 on the fuel trims and have bought yourself a ton of fueling headroom - fuel system dependent which in the case of the gen3/4 cars is plentiful.

Bottom line, dont do that again lol.

 

[So0_NaSTy]

Logged trims. Things are fantastic. I’m running stioch, LT and ST are all well within limits. I don’t know how it’s possible, but I’ve ran multiple logs and compared. Thing runs beautiful. I’ve seen people run straight up E85 with no issues. Yet some people are getting CEL’s on 20% E. Depends on the car.

 

[ZXMustang]

Logged trims. Things are fantastic. I’m running stioch, LT and ST are all well within limits. I don’t know how it’s possible, but I’ve ran multiple logs and compared. Thing runs beautiful. I’ve seen people run straight up E85 with no issues. Yet some people are getting CEL’s on 20% E. Depends on the car.

What were the trims at? I would guess LTFTs at around 25%+ and the shorties in the 10s-teens. Maybe less on the shorties, but still you got a max headroom "I believe" around +or- 35%. Actually I've seen more I think. Its been a while since I've seen a log that far out. At this point in the game, I can almost guess within a few % when doing the maf airflow tuning where you need to be based on the brand CAI and so on. For gen3 obv. Gen 4 cars have some nuances to maf(s) tuning and speed density correlation now.

 

[Abilor]

You’re so completely wrong it’s silly. You have both DI and PI fuel systems lol. And even on full e85, you still have a consistently observed 40-50% overhead when only warm blending in 10% PI injection. You still have a tremendous amount. Of NA headroom to run full e85, and it’s been this way since the 2018+ cars through today. You really need to do a bit of research. Unless you are thinking about the gen 1/2 cars then you’d be right. But not on gen3/4. This is proven.

First of all, watch your tone; I don’t deserve the heat.

That said, I was saying that with GT500 injectors, e85, and Stage 2 Whipple, I wouldn't be confident over thousands of miles I wouldn't peg the duty cycle under full boost without further fuel upgrades.

I understand an NA S650 can run e85 all day long; not the point I was making. Read the thread before you flex that pimp hand.

 

[ZXMustang]

First of all, watch your tone; I don’t deserve the heat.

That said, I was saying that with GT500 injectors, e85, and Stage 2 Whipple, I wouldn't be confident over thousands of miles I wouldn't peg the duty cycle under full boost without further fuel upgrades.

I understand an NA S650 can run e85 all day long; not the point I was making. Read the thread before you flex that pimp hand.

Lol bro I got you. No need to get upset, the internet isnt that serious. Personally I wouldnt run anything but an FIC1k or ID1050 on that set up. Especially since tuning is out for whipple kits and you can easily read out that whipple tune and make the changes you need for injectors.

At that point you are perfectly safe to lean into that PI system a bit with the warm blend and enjoy some e30. Lord knows I did for about 20k miles and probably 200 quarter mile passes with my 22 gen3 whipple car. No you shouldnt need a BAP or pump upgrade if you keep that 3.750 pulley installed. If you push down that pulley size, id keep an eye on it but you probably will be fine still with a 3.500.

And apologies man I didnt read the context here you were replying to with boost.

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