Anyone ever test fuel types on the dyno?

[racer24crm]

I always just assumed manufacturers had weak tunes from the factory to account for the various real world scenarios the cars can see. Low/high octane, good/bad gas, varying temperatures and elevations, etc. Then I figured the rest was due to emissions regulations.

So, If you get a tune on your car will there be a chance that it won't pass an emissions test? What happens if you get a tune for say 92 and then you run 89 or 93, will it screw anything up?

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[jasonstang]

I always just assumed manufacturers had weak tunes from the factory to account for the various real world scenarios the cars can see. Low/high octane, good/bad gas, varying temperatures and elevations, etc. Then I figured the rest was due to emissions regulations.

So, If you get a tune on your car will there be a chance that it won't pass an emissions test? What happens if you get a tune for say 92 and then you run 89 or 93, will it screw anything up?

Realistically, tuner should always tune the 3D mapping so the engine can still run all kinds of gas. The only difference is it will be more aggressive when the octane gets higher. Factory tunes are generally conservative towards high rpm because octane difference every time you fill up. It's safer to default to 87 mapping.

 

[Livernois Motorsports]

I always just assumed manufacturers had weak tunes from the factory to account for the various real world scenarios the cars can see. Low/high octane, good/bad gas, varying temperatures and elevations, etc. Then I figured the rest was due to emissions regulations.

So, If you get a tune on your car will there be a chance that it won't pass an emissions test? What happens if you get a tune for say 92 and then you run 89 or 93, will it screw anything up?

Newer cars have monitors and sensors that are engineered into the fueling, cooling and environmental systems to account for bad quality gas, 87 or below octane, high additive contents etc.... Those systems will accommodate for those variables. The majority of what kills your car's performance and efficiency is definitely emissions.

That is a definite possibility. We make ZERO attempt to hide that fact. This is why it is critical that your handheld interface hold onto your stock file at all times! We also recommend that you keep all of your stock parts if you change anything more than just a CAI or catback. The regulations can and do vary greatly from state to state, city to city and even in some cases county to county.

You can always run a fuel that contains more octane than the tune that you are running, BUT YOU CAN NEVER RUN LESS. That is why we made a motherboard for our MyCal tuner that can hold upto 4 custom tuning files PLUS your stock file at one time. We also recommend a few things when requesting a tune.

Request tunes for regular, mid-grade and premium fuels
You want to do this because there are going to be times that you might find a station that is either out or does not offer higher than 87 octane fueling at the pump.

Request 91 as well as 93 tuning
The reasoning for this is what if you go on a road trip, or happen to take an extended Sunday drive, and wind up in a place 93 is not the premium. Several large places like LA, Las Vegas and Denver for example do not have 93 as an available fuel. So if your tuner can only hold one tune at a time...you are forced to go back to stock. BUMMER! What if you have mods that the car cannot be returned to stock and driven safely? :doh:

Request tunes for mods as well as no mods
Just like stated above you do not want to be stuck someplace without a tune to run.

There are several safeguards that you can employ to ensure that the tuning process is always a positive one. As long as you stick with an experienced, knowledgeable and capable tuning company you are golden!:cheers:

 

[timd38]

Newer cars have monitors and sensors that are engineered into the fueling, cooling and environmental systems to account for bad quality gas, 87 or below octane, high additive contents etc.... Those systems will accommodate for those variables. The majority of what kills your car's performance and efficiency is definitely emissions.

:cheers:

I use to live in Novi and I went to several of their open houses. I also have Corvette and despite their knowledge of LS engines I always considered to be Ford experts and I have never heard one complaint form my Ford friends that had work done by them. In fact they drove to Chicago, picked up a friends car, took it back, and supercharger on it at a price that was so competitive they didn't do it himself.

Great people that really know Mustangs!

 

[Livernois Motorsports]

I use to live in Novi and I went to several of their open houses. I also have Corvette and despite their knowledge of LS engines I always considered to be Ford experts and I have never heard one complaint form my Ford friends that had work done by them. In fact they drove to Chicago, picked up a friends car, took it back, and supercharger on it at a price that was so competitive they didn't do it himself.

Great people that really know Mustangs!

Thanks for that review Tim! We appreciate it.


The funniest thing to us is that each group of modders (Ford, GM or Mopar) all think that we specialize in something else. Ford guys think that we only work on GM, Mopar guys think that we only do GM and GM guys think that all we do is Ford. WE DO IT ALL GUYS LOL!

We offer the same proprietary tuning and parts support that we have for Ford, for several late-model GM and Mopar performance vehicles. Some of the vehicles that we have support for are most LS1 and LS2, all LS3, LS7, LS9, LT1 and LT4 powered GM vehicles. We also have parts and tuning support for many 5.7L Hemi and all 6.1L, 6.2L and 6.4L SRT Chrysler models!

 

[BradleyMac]

So I have essentially a stock 2017 mustang GT PP. All I've done is to remove the resonator and replace it with an H pipe and Mishimoto axle back pro exhaust. No change in the exhaust size.

If I got a tune to run 93 octane gas, how much hp/tq would I get from such a Livernois tune and what device would you recommend?

 

[ENPhoto]

https://m.youtube.com/user/TheTuningSchool

These guys test it all.

Have a good little series on different fuel types.

Where I'm at, 94 is the best you can get at the pump...and 94+Boostane or 94+100% Meth really surprised me.

 

[BmacIL]

So I have essentially a stock 2017 mustang GT PP. All I've done is to remove the resonator and replace it with an H pipe and Mishimoto axle back pro exhaust. No change in the exhaust size.

If I got a tune to run 93 octane gas, how much hp/tq would I get from such a Livernois tune and what device would you recommend?

You can expect about 25-30 at the wheels with all of that. It's very noticeable. I would recommend the V11 tune as it's got a smoother/more linear demand table that makes low throttle modulation just like stock, but the response is improved all over the place.

 

[NoVaGT]

Check here for the gains you can expect https://www.livernoismotorsports.com/product/LPP631124

livernoismotorsports, I'd like some more back-ground on this dyno chart.

Same day? Same car? Same fuel?

I'm having a hard time believing 50HP from nothing but a tune. But I'd be a customer if you could provide more supporting information.

ETA; You're in Dearborn Heights? Lol......I'm from Dearborn.

 

[Dr. Norts]

You can expect about 25-30 at the wheels with all of that. It's very noticeable. I would recommend the V11 tune as it's got a smoother/more linear demand table that makes low throttle modulation just like stock, but the response is improved all over the place.

+1

V11 tune in my eyes can't get any better. I'd even go as far to say the drivability is better than stock with more power everywhere.

 

[BradleyMac]

+ 2

where are the details of this V11 tune. couldn't find details on the livernois site.

 

[AlmostFamous]

2 stock 2011-2014 Mustang GT dynos. 91 vs 93 and 87 vs 93.

91 vs 93: Final run it made like 3 rwhp more and 0 rwtq more than the two best 91 octane runs.

87 vs 93: 6 RWHP peak difference. Not that much, but look at the difference in the mid range, especially 4500-6000 rpm. Looks to be ~20 RWHP difference in places (corresponding increase in torque, of course)

5.0 GT Stock dynos 91 octane vs 93 octane

First two runs the car made essentially NO more power.
Then on the third and final run it made like 3 rwhp more and 0 rwtq more than the two best 91 octane runs.

They probably put in the ability to adjust up to 91.5-92 on the high rpm range which gives it a couple extra hp but no additional torque.
I think we can safely say using 93 octane instead of 91 octane gains you 3-4 hp up in the higher rpms for a bit, but as you can see it's not sustained over a large rpm range. So it just may be an anomaly that it made the additional 3 rwhp at the peak.
So 91 octane state people don't need to feel bad, without a tune, guys in 93 octane states aren't getting really any more power out of their stock 5.0's

http://themustangsource.com/forums/f726/5-0-gt-stock-dynos-91-octane-vs-93-octane-487398/

87 vs 93 Octane Dyno Graph

Below is a dyno graph showing the difference between 87 octane and 93 octane. According to the shop, no other changes were made to the car/tune/etc. Similar weather for both passes, car at normal operating temperatures.

Note: 6 RWHP peak difference. Not that much, but look at the difference in the mid range, especially 4500-6000 rpm. Looks to be ~20 RWHP difference in places (corresponding increase in torque, of course).

http://themustangsource.com/forums/f726/87-vs-93-octane-dyno-graph-484635/

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