3.3 TT OEM tune does pretty well with race gas

[CaliSting]

i always like to see how well stock oem tune does in optimizing timing etc for race gas. Filled up with 100 octane unleaded. Was pretty impressed. Butt dyno feels like 15 hp? 3.3 TT really comes alive. More so than any of my past turbo cars running on 100 octane. Curious has anyone run stock car with 100 octane on dyno? Curious to what octane ECU can optimize to? 95 octane? Higher?

Going back to Californias 91 octane premium is sort of depressing now.

 

[Kazz]

It would be nice if someone dyno-checked power improvements by octane. I've seen this done with other, modern vehicles. So I'm hoping!

 

[Waynerm002]

Can’t say anything on it on the Stinger, tried some in my 2000 A4 back in the day, a mix of 95 and 100. Had a Sunoco station not to far fro a race track in Baltimore that had race fuel. Guy at the station suggested the mix as I didn’t want to kill my car on straight race gas. That was the best the car ever felt! Response was fantastic, it got up to speed quicker and it never felt labored when being pushed hard. It was so much fun! I can only imagine how much better the Stinger would be with it.

 

[Never thought]

FYI- I am fairly certain the manual specifically says not to use E85. But I could be wrong.

 

[Waynerm002]

That’s ethanol, not the same as race gas with 100 octane rating.

 

[CaliSting]

That’s ethanol, not the same as race gas with 100 octane rating.

Yep. This is standard unleaded 100 octane race fuel for street cars. Not e85. Car just rips with it in the tank.

 

[Never thought]

Yep. This is standard unleaded 100 octane race fuel for street cars. Not e85. Car just rips with it in the tank.

Ahhh ok. Thanks for clarifying.

 

[G-926381]

Can’t say anything on it on the Stinger, tried some in my 2000 A4 back in the day, a mix of 95 and 100. Had a Sunoco station not to far fro a race track in Baltimore that had race fuel. Guy at the station suggested the mix as I didn’t want to kill my car on straight race gas. That was the best the car ever felt! Response was fantastic, it got up to speed quicker and it never felt labored when being pushed hard. It was so much fun! I can only imagine how much better the Stinger would be with it.

You wouldnt kill your car on race gas lmao. Never take car advise from the gas station attendant ;-). I run 100 in my forte sx on the regular and it responds very very well. Just dont use leaded race gas at least not very much unless your not running o2s or cats if not than leaded 110 is the way to go if your boosted.
Wow type that and bam post is like 4 years old lol

 

[Travis Wills]

This really needs to be measured in a controlled manner. Butt dynos are not an accurate way of determining if it makes it better or not.

I haven’t tried anything over 93 Octane yet. However, I have compared 93 Octane and 87 Octane, with a bone stock Stinger, with a dragy(extremely precise and accurate device), on the same stretch and they were essentially identical for 0-60 mph and for the 1/8 of a mile. However, that was in cooler temperatures.

It is entirely possible that in warmer temperatures the lower Octane fuel causes the engine to cut back timing.

That being said I highly doubt that the car accounts for higher than 93 Octane in its timing. There wouldn’t be any point in them exceeding their stated performance figures with extremely high Octane fuel. That is what their warranty is based upon and those specifications are based on “91 Octane or greater“ fuel.

I think the car is designed to hit its maximum performance standards in ALL conditions with 91 Octane or higher fuel. It can hit those same standards with 87 Octane or higher in SOME if not most conditions. However, I don’t think putting higher than 91 Octane gas will make a bit of difference in a truly stock Stinger GT.

I definitely would like to see it scientifically tested but I seriously doubt it makes a difference without a modification to the tune.

Here are many different Dragy 0-60 mph runs with 93, 89, and 87 Octane gas. The earliest runs were all with 93 Octane. Then 89 was used. Then 87 was used.

I was able to achieve essentially the same results no matter which fuel I used. However, this was only with cooler temperatures. I fully expect the lower Octane results to degrade as the temperature goes up.

I was able to do 4.95 0-60 mph with 87 Octane and 4.93 0-60 mph with 93 Octane. That is not a significant enough difference to warrant using 93 Octane in cooler weather.

 

[Aarvix]

Nice data, thanks for labeling most of your pulls.

The big caveat here is stock boost level, but it's interesting to see 87 hanging with 93. I wonder what would happen in TX when it's 100+ outside.

 

[Travis Wills]

Nice data, thanks for labeling most of your pulls.

The big caveat here is stock boost level, but it's interesting to see 87 hanging with 93. I wonder what would happen in TX when it's 100+ outside.

Yes temperature could have a very significant affect on it. My wife’s expedition has the 3.5 Liter TT ecoboost engine. The owner’s manual for that car says to use 87 or higher. However, it does say in summer months higher Octane gas may prevent engine performance losses.

We put 87 octane in it from day one. However, in July it was close to 100 degrees here and we noticed the engine not giving us full power. Both of us noticed separately but we both mentioned it to each other. We put 93 octane in and it resolved the issue for the rest of July and August. Now that it is cooler we have switched back to 87 and it doesn't have an issues now.

Mods, even the slightest mods could affect it as well. However, if it is bone stock and it is cool out then I think it will perform the exact same with 87, 89, 91, 93, or even 100+ Octane gas.

The only way to truly prove it would be to put it on a dyno with the different Octane levels back to back while draining the gas in between runs.

 

[BrocStar]

i always like to see how well stock oem tune does in optimizing timing etc for race gas. Filled up with 100 octane unleaded. Was pretty impressed. Butt dyno feels like 15 hp? 3.3 TT really comes alive. More so than any of my past turbo cars running on 100 octane. Curious has anyone run stock car with 100 octane on dyno? Curious to what octane ECU can optimize to? 95 octane? Higher?

Going back to Californias 91 octane premium is sort of depressing now.

Hey man. I know this a an old thread but need some advice. I have a station that has Sunoco 100 or 110 race gas at a station near me. I am getting intakes, snorkels, and a couple other mods including JB4. Did you mix the 100 or 110 with any other octane like 91? I am worried about using it strait and is it okay to do so. ??

 

[rpoffen]

Hey man. I know this a an old thread but need some advice. I have a station that has Sunoco 100 or 110 race gas at a station near me. I am getting intakes, snorkels, and a couple other mods including JB4. Did you mix the 100 or 110 with any other octane like 91? I am worried about using it strait and is it okay to do so. ??

I can only imagine how much 110, or even 100 would cost these days.

 

[BrocStar]

I can only imagine how much 110, or even 100 would cost these days.

Just found out today. 100 octave unleaded was 19.80 a gallon. No thanks

 

[rpoffen]

Just found out today. 100 octave unleaded was 19.80 a gallon. No thanks

Last week when I mixed E85 to get E30, it was $4.09/gal, and that's in California. 91 octane pump is still mid $5.
At these prices, the Fuel-it flex fuel kit will pay for itself in a couple months.

 

[stoopid]

Just found out today. 100 octave unleaded was 19.80 a gallon. No thanks

The strategy would be that on track day with an almost empty tank, on fumes make it to the 100 octane gas station and only add the gallons you think you'll need for the day, then fill up normally at the closest station to the track before heading home. If you only need two or five gallons for runs/laps, then it's at least justifiable. If it gives the car a noticeable performance bump then it's a cheap mod, if you want to think of it that way. And you only have to spend the money when you want, and maybe just the one time.

 

[BrocStar]

Last week when I mixed E85 to get E30, it was $4.09/gal, and that's in California. 91 octane pump is still mid $5.
At these prices, the Fuel-it flex fuel kit will pay for itself in a couple months.

Can you explain how the flex it fuel kit works ?
What is it?

 

[stoopid]

Can you explain how the flex it fuel kit works ?
What is it?

Not sure this is the exact model for the Stinger, but there's a lot of general info on this page [scroll to bottom]:

Fuel-It Universal DIY FLEX-FUEL Kit for 5/16" Fuel Lines

Universal Ethanol content sensor gauge. DIY kit.

fuel-it.com

 

[rpoffen]

Can you explain how the flex it fuel kit works ?
What is it?

Here’s a link to the Kia/Hyundai/Genesis version.

Fuel-It! Bluetooth FLEX FUEL KIT for KIA/GENESIS 3.3L

If you're running E85 or ethanol mixes in your Audi, you need this kit! It's plug and play with a Bluetooth ethanol sensor. Easy 15 min install. Fast Shipping.

fuel-it.com

This is plug and play. Took me maybe 15 minutes to install. With it, you always know the exact E mix you have in your tank. It even connects to the jb4 so it knows what you are running. I believe certain maps will use this to adjust boost.

 

[stoopid]

Here’s a link to the Kia/Hyundai/Genesis version.

Fuel-It! Bluetooth FLEX FUEL KIT for KIA/GENESIS 3.3L

If you're running E85 or ethanol mixes in your Audi, you need this kit! It's plug and play with a Bluetooth ethanol sensor. Easy 15 min install. Fast Shipping.

fuel-it.com

This is plug and play. Took me maybe 15 minutes to install. With it, you always know the exact E mix you have in your tank. It even connects to the jb4 so it knows what you are running. I believe certain maps will use this to adjust boost.

To be clear, this doesn't require an engine tune? The stock ECU calibrates for E85?