3.3T Ecu tune

[BlackedOutG70]

Im still a rookie on everything, I’m very young and still learning the terms and vocabulary of everything, but what exactly is AFR’s and what numbers would be too high or too low, because if 15 AFR is where the jb4 has a safety to cut off... I’m looking at my map 2 jb4 log and I’m seeing my AFR as high as 16.7

 

[Toddasaurus]

I hear you.

Right now I'm debating as to whether or not I'll be installing primary downpipes. Now that I learned from my mistakes it's an upgrade that I know I can do. But, many people are saying it ruins the turbos oil seal and causes leaking into the exhaust when running aftermarket downpipes, even ones with HFC's.

Either way, I'll do doing an intercooler upgrade, so I'll be almost at full bolt ons.

I emailed Tork yesterday about their stage 1 tune, also concerning their upcoming stage 2 tune. As of right now they have the most intriguing tune to me. Still, I figure it will be worth waiting a while to see what others come up with. Also, there's a chance we can flash our ECU'S at home via OBD2 or CANBus sometime in the near future anyway, and I'd like to wait for that. JB4 is still pretty good in the mean time.

 

[Vortex951]

Im still a rookie on everything, I’m very young and still learning the terms and vocabulary of everything, but what exactly is AFR’s and what numbers would be too high or too low, because if 15 AFR is where the jb4 has a safety to cut off... I’m looking at my map 2 jb4 log and I’m seeing my AFR as high as 16.7

so AFR stand for air fuel ratio. mine spike from time to time but not long enough for the jb4 to trigger a safety most of the time when i launch the car my afr starts around 15-16 and quickly drops to high 11 or low 12 but 99 percent of the time under full throttle my afr stays at 11.7 or 11.8 basically if you run a car at like 15.0:1 or higher for to long which is probably no more than like 5 seconds you can expect the engine to probably blow. the lowere the number means you have more fuel in your engine. id look at where your afr is most of the time but only under full throttle when you are just cruising around at normal speed with no load on the engine it should stay around 15. as that isnt dangerous sincve you arent shoving a tone of boost through it

 

[Toddasaurus]

Im still a rookie on everything, I’m very young and still learning the terms and vocabulary of everything, but what exactly is AFR’s and what numbers would be too high or too low, because if 15 AFR is where the jb4 has a safety to cut off... I’m looking at my map 2 jb4 log and I’m seeing my AFR as high as 16.7

AFR = Air Fuel Ratio. As a ratio, it refers to the amount of air to fuel, measured in parts. So, a 16.7 AFR is 16.7 parts air to 1 part fuel.

I think something like 14.7:1 is considered stoichiometric, meaning the fuel is completely burned up and all of the air is utilized to burn said amount of fuel. So, running richer than this leads to fuel being effectively wasted during combustion. But, engine makers run richer than this during WOT on purpose, with the intent to cool down and slow combustion so things don't run too hot and cause knock. This is especially true in turbo engines, as the combustion chamber is even more chaotic than an equivalent NA engine.

It's not abnormal to see super lean AFR's low RPM's in your logs. Part of it is due to the fact that our engine run a little lean initially upon flooring it, while everything spools up, it's also partially due to some very slight lag in the sensors picking up the o2 signals. Just as long as your AFR's stabilize after like 3.5k RPM's or something like that you're totally fine. The JB4 has some nice little safety features built such as what you mentioned that I like.

 

[tarhoosier]

WOT=Wide open throttle
Natural aspirated engine (no turbo or supercharger)

Does this site need a sticky where people contribute to acronyms and initialisms?

 

[BlackedOutG70]

AFR = Air Fuel Ratio. As a ratio, it refers to the amount of air to fuel, measured in parts. So, a 16.7 AFR is 16.7 parts air to 1 part fuel.

I think something like 14.7:1 is considered stoichiometric, meaning the fuel is completely burned up and all of the air is utilized to burn said amount of fuel. So, running richer than this leads to fuel being effectively wasted during combustion. But, engine makers run richer than this during WOT on purpose, with the intent to cool down and slow combustion so things don't run too hot and cause knock. This is especially true in turbo engines, as the combustion chamber is even more chaotic than an equivalent NA engine.

It's not abnormal to see super lean AFR's low RPM's in your logs. Part of it is due to the fact that our engine run a little lean initially upon flooring it, while everything spools up, it's also partially due to some very slight lag in the sensors picking up the o2 signals. Just as long as your AFR's stabilize after like 3.5k RPM's or something like that you're totally fine. The JB4 has some nice little safety features built such as what you mentioned that I like.

so AFR stand for air fuel ratio. mine spike from time to time but not long enough for the jb4 to trigger a safety most of the time when i launch the car my afr starts around 15-16 and quickly drops to high 11 or low 12 but 99 percent of the time under full throttle my afr stays at 11.7 or 11.8 basically if you run a car at like 15.0:1 or higher for to long which is probably no more than like 5 seconds you can expect the engine to probably blow. the lowere the number means you have more fuel in your engine. id look at where your afr is most of the time but only under full throttle when you are just cruising around at normal speed with no load on the engine it should stay around 15. as that isnt dangerous sincve you arent shoving a tone of boost through it

Thank you very informative guys, my AFR is only high initiative to WOT then goes down to mid 12’s and mid 11’s while WOT

 

[Vortex951]

Thank you very informative guys, my AFR is only high initiative to WOT then goes down to mid 12’s and mid 11’s while WOT

Mid 11s sounds about right if you use the jb4 default settings

 

[CoconutRob]

Who is going to dive first and get a pressertech tune. Stingers have done it but no G70s. I called them today and am torn between the pressertech and the JB4.

 

[Vortex951]

Who is going to dive first and get a pressertech tune. Stingers have done it but no G70s. I called them today and am torn between the pressertech and the JB4.

Not gonna lie I’ve been reading into it and it sounds good. Probably make more power than I am with the jb4 to be honest. Plus never having to mix fuel for track days would be nice haha

 

[Toddasaurus]

The nice thing about the PRESSERTech tune is that you can still use your JB4 for fine tuning if you want.

I think we are all getting pretty dang pumped about their tune - myself included!

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[BlackedOutG70]

I’d do it but still in early ownership of the car, not sure I wanna risk voiding warranty this early considering we don’t know how things are long term yet, still very new platform correct? I’d love to have some pops and bangs too though, not too loud though just maybe how the AMG’s sound or the new supra, love those sounds.

 

[Vortex951]

Was their stage 2 tune making 18 pounds on 91 octane? Or 93?

 

[Toddasaurus]

Was their stage 2 tune making 18 pounds on 91 octane? Or 93?

93 octane, not sure what amount of boost, though... But word on the street is that there is virtually no loss in power/performance on 91 octane.

 

[Vortex951]

93 octane, not sure what amount of boost, though... But word on the street is that there is virtually no loss in power/performance on 91 octane.

That’s good since I don’t have access to 93 in Vegas. So 91 is what I’d used the most.

 

[OMG70]

The nice thing about the PRESSERTech tune is that you can still use your JB4 for fine tuning if you want.

I think we are all getting pretty dang pumped about their tune - myself included!

This means Todd is going to get it...probably first! I'm calling it now

I’d do it but still in early ownership of the car, not sure I wanna risk voiding warranty this early considering we don’t know how things are long term yet, still very new platform correct? I’d love to have some pops and bangs too though, not too loud though just maybe how the AMG’s sound or the new supra, love those sounds.

The burbles, right? Nothing (stock) beats the sounds that AMG cars put out below ~$300k

 

[BlackedOutG70]

This means Todd is going to get it...probably first! I'm calling it now



The burbles, right? Nothing (stock) beats the sounds that AMG cars put out below ~$300k

Yeah something like that, like how the M3 sounds with valves open on deceleration. I crave having that I wish the G70 was capable, I saw lap3 USA has a youtube video of a g70 on a dyno with they’re ecu tune they are working on and the pops and crackles sound pretty nice on it, but a bit too loud. Power is nice out of an ecu tune but the main reason I’d do it is to get those sounds to be honest haha but that’s just me.

 

[Vortex951]

I haven’t actually seen any 1/4 times or dyno results with the presser tune other than what they posted (which was a lot). Has anyone else found 1/4 mile times with this tune by any chance? And did I read correctly that it also included a back end flash that adjust shift timing?

 

[joschneider]

Tork does the same thing as pressertech FYI, just another option. He’s an ass though and I wouldn’t personally trust him. It’s not a scam or anything and it’s a real tune, the bedside manner is lacking. Just something to consider

 

[Vortex951]

I’ve seen a lot about that being the case. I’m probably holding off on a ecu tune until I get intercooler and downpipes but it’s nice to have the time to explore the options

 

[Toddasaurus]

Tork Motorsports is saying that they'll have OBDII flashing available "hopefully" by Spring. If they do it, I'd be down to get it.