The GT350 LOVES Race Gas

[PositiveGMotorworks]

I've been driving around with the Lund 93 tune for a couple weeks now and watching the nGauge for timing advances or retardation. Just like with the OEM tune, timing is added (shown as '-' KnockR numbers) until knock is detected and then timing is retarded or pulled (shown as '+' KnockR numbers).

What I've observed is timing being added under partial throttle acceleration and it being pulled under full throttle acceleration. After research, I've come to understand this is normal and Ford has these cars setup to add as much timing as possible based on the amount of octane, etc.

We've seen dyno comparisons at 93 octane vs 98 octane and the car makes more power. That is not in question, but yesterday I had the opportunity to put 100 octane gas in and the car runs so much better. The engine feels different, seems smoother but angrier at the same time. The power is evident. Now under full throttle acceleration timing is continually being added in huge chunks. I saw as much as 6 degrees being added all the way to redline. I have a half tank left and I'm going to savor those 125 miles.

I think it's pretty awesome that Ford engineered the car to be able to take advantage of race gas on the track. It's almost like a hidden easter egg for those that don't mind spending $9 a gallon on gas. It's worth it for everyone to do it at least once.

I plan to dyno mine one day just to have more data on how much power I'm really picking up.

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[SpursFan]

I've been running 96 and I can certainly tell a difference over Cali's crappy 91. Not tune or ngage to validate timing changes.

 

[Zitrosounds]

100% agree! Although I have not verified the results (others have) on a dyno the voodoo responds marvelously to the higher octanes. I have also used 98 and 100 @ Barber MSP and it was evident the engine was happier and so was I. Stock tune, OBDLink MX for data logging.

 

[cobra4ever]

Where do you find anything more than 91 in Kali?

 

[FogcitySF]

Interesting. What type of knock sensors does the GT350 use? Didn't see anything in the documentation.

 

[FlowForm_Wheels]

Where do you find anything more than 91 in Kali?

Some stations around will have a singular pump for race gas specifically, but it's relatively rare.

Check this interactive map. It'll help with finding race gas in SoCal - https://www.google.com/maps/d/viewe...l=34.133898086816785,-118.39885893261715&z=10

Also you can check to see where Sunoco is sold - http://www.sunocoracefuels.com/fuel-finder

 

[EF300]

I have a 100 octane pump by my house but damn its $10 a gallon.

 

[MustangCollector]

i totally feel this is plausible because exotics are the same way, better fuel and a remap i have seen friends NA Lambos make over 50hp on the dyno.

Once i reach the 1000 mile break in and do an oil change i am driving to NJ to get some Sunoco 100+ to try in the tank. I am sure it will be evident, yes expensive for sure, so glad we dont have 91 in NY.

 

[Ctease]

Interesting. What type of knock sensors does the GT350 use? Didn't see anything in the documentation.

What type? Normal type... same as Coyote
Two sensors, one on each bank of the V, mounted under the intake manifold directly to the block. (18 Coyote PFDI has 4 sensors)

 

[Tank]

Here's a nationwide link for Sunoco Race Fuels:

http://www.sunocoracefuels.com/fuel-finder

Google Maps for race gas:
https://www.google.com/maps/d/viewe...&hl=en&ll=44.27035024281151,-72.256467025&z=4

 

[stanglife]

I have a half tank left and I'm going to savor those 125 miles.

Lol - I found that very entertaining. :amen:

 

[Eric0w]

I've been driving around with the Lund 93 tune for a couple weeks now and watching the nGauge for timing advances or retardation. Just like with the OEM tune, timing is added (shown as '-' KnockR numbers) until knock is detected and then timing is retarded or pulled (shown as '+' KnockR numbers).

What I've observed is timing being added under partial throttle acceleration and it being pulled under full throttle acceleration. After research, I've come to understand this is normal and Ford has these cars setup to add as much timing as possible based on the amount of octane, etc.

We've seen dyno comparisons at 93 octane vs 98 octane and the car makes more power. That is not in question, but yesterday I had the opportunity to put 100 octane gas in and the car runs so much better. The engine feels different, seems smoother but angrier at the same time. The power is evident. Now under full throttle acceleration timing is continually being added in huge chunks. I saw as much as 6 degrees being added all the way to redline. I have a half tank left and I'm going to savor those 125 miles.

I think it's pretty awesome that Ford engineered the car to be able to take advantage of race gas on the track. It's almost like a hidden easter egg for those that don't mind spending $9 a gallon on gas. It's worth it for everyone to do it at least once.

I plan to dyno mine one day just to have more data on how much power I'm really picking up.

I wonder what kind of power the car is making on stock tune with 100 octane.

 

[Eric0w]

Where do you find anything more than 91 in Kali?

There is a 100 octane pump in a 76 gas station in pasadena.

 

[cobra4ever]

Cool thanks for the list - 2 76 stations near me with 100 octane. Miss the pre '74 oil embargo where "gas wars" brought 98 octane to about 35 cents a gallon !

 

[Bertetto]

Just found two places here in Springfield, one had 100 and the other is 110. Didn't get a price for the 110 but the 100 is $7.59 a gallon. I know what I'm doing Saturday.

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