E30 Blend questions

[So0_NaSTy]

Hello everyone. I have a question for some of you that genuinely did the research into this, and not just guessing.
I’ve heard that these 24 and up mustangs can safely handle E30 blends just fine, without a custom tune. Is this actually factual, and is that the highest blend it can handle? Any insight would be great.

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[Q6543]

Yeah E30 was worth roughly 20HP stock, E40 didn’t gain anymore

 

[So0_NaSTy]

Yeah E30 was worth roughly 20HP stock, E40 didn’t gain anymore

Ngl man. 20 extra wheel off of e30 blend is incredible…. E40 I don’t think the car can handle on a stock tune.

 

[Q6543]

It can handle it fine, just no gains over E30
For N/A that’s gonna give you maximum spark tolerance/cooling needed.

It’s worth 2 tenths/mph at the track

 

[mwbgxp]

The Mustang Owner's Manual on page 151 says not to use "Fuel containing more than 15% ethanol (E15) or E85 fuel." IMO, this is due to a concern regarding corrosion in plastic or rubber parts in the fuel system such as hoses or seals. Some other cars that are designed to run E85 or are "Flex fuel" have special corrosion resistant parts. The potential corrosive impact of high ethanol content fuel is cumulative over time.

 

[robvas]

The Mustang Owner's Manual on page 151 says not to use "Fuel containing more than 15% ethanol (E15) or E85 fuel." IMO, this is due to a concern regarding corrosion in plastic or rubber parts in the fuel system such as hoses or seals. Some other cars that are designed to run E85 or are "Flex fuel" have special corrosion resistant parts. The potential corrosive impact of high ethanol content fuel is cumulative over time.

It's because if you put straight e85 in a Mustang it wouldn't run right

The fuel system components being damaged by ethanol hasn't been an issue in a long time.

 

[mwbgxp]

I agree, that there would also be a "tuning issue" with E85. This is separate from the cumulative corrosion issue on fuel system components issue from high (greater than E15) ethanol blends.

 

[Junkyard Dog]

It’s worth 2 tenths/mph at the track

Did you personally do this naturally aspirated, stock, at the track and discover this to be true or repeating what you have read elsewhere?

If yes, what were your times, mph, before and after? And was it with sticky tires?

 

[Germansheperd]

The Mustang Owner's Manual on page 151 says not to use "Fuel containing more than 15% ethanol (E15) or E85 fuel." IMO, this is due to a concern regarding corrosion in plastic or rubber parts in the fuel system such as hoses or seals. Some other cars that are designed to run E85 or are "Flex fuel" have special corrosion resistant parts. The potential corrosive impact of high ethanol content fuel is cumulative over time.

Get to the track with 2gal of 93 and 1 gal of E85 or 4gal of 93 and 2 gal of E85. When you are done racing stop by a gas and put 2/4 gal of non ethanol gas in the tank.
Problem solved.

 

[Germansheperd]

Did you personally do this naturally aspirated, stock, at the track and discover this to be true or repeating what you have read elsewhere?

If yes, what were your times, mph, before and after? And was it with sticky tires?

I can’t vouch for Q’s time slips but there are hundreds of videos of different makes and models picking up something on E30 on the dyno.
It works- it is worth something.

 

[Junkyard Dog]

I can’t vouch for Q’s time slips but there are hundreds of videos of different makes and models picking up something on E30 on the dyno.
It works- it is worth something.

Yes, I have seen them, but typically they are small pulley setups with a Whipple. And I was very curious about the 2/10 pickup in e.t. and whether that was completely stock. That is a lot just from switching fuel.

 

[Germansheperd]

Yes, I have seen them, but typically they are small pulley setups with a Whipple. And I was very curious about the 2/10 pickup in e.t. and whether that was completely stock. That is a lot just from switching fuel.

As I stated can’t confirm someone else’s gain but he is correct in the sense a gain is there.

 

[Q6543]

Yeah iirc I was 12.2s 115 bone stock pump 93 stock tires everything, and the next time out I was 12.00s 117 E30 blend…. Also stock tires and in worse summer air.

 

[ZXMustang]

Im a tuner and also ran and logged my personal 25gt on e30 for months before tuning came out. The car was super happy on e30. There are no actual "gains" unless you are consistently getting spark knock on 93 vs no knock on e30. That was the case with my car. I would occasionally get knock on 93 from pull to pull, as well as see cat over temp kicking in like crazy after the first pull.

On e30, I rarely saw cat over temp enrichment and NEVER had a hint of knock. There isnt enough ethanol in e30 blend to add enough cooling to the fuel charge over regular e10 fuel. So you wont see any gains on e30 except the guaranty that you wont get any power killing spark knock.

I have hours of datalogs and driving data to back all this up. No guessing or word of mouth. If you want to remain stock and not tuned, then e30 will guaranty that you are getting the most out of your stock car/spark maps that you are given by Ford. Thats it really.

Fuel trims handled it well and were consistently adding 10%-15% fuel at any given airload/pedal position to account for the added E content over the 14.08 OEM stoich point. When tuning was available, I dropped my stoich point to 13.00 in the tune for the rest of the e30 I had in the tank and fuel trims were dead nuts perfect + or - 1%.

e30 was cool to run and helps keep the car honest. Aside from that you are not going to gain anything else unless you have been losing from detected knock on e10 93.

 

[Zig]

Im a tuner and also ran and logged my personal 25gt on e30 for months before tuning came out. The car was super happy on e30. There are no actual "gains" unless you are consistently getting spark knock on 93 vs no knock on e30. That was the case with my car. I would occasionally get knock on 93 from pull to pull, as well as see cat over temp kicking in like crazy after the first pull.

On e30, I rarely saw cat over temp enrichment and NEVER had a hint of knock. There isnt enough ethanol in e30 blend to add enough cooling to the fuel charge over regular e10 fuel. So you wont see any gains on e30 except the guaranty that you wont get any power killing spark knock.

I have hours of datalogs and driving data to back all this up. No guessing or word of mouth. If you want to remain stock and not tuned, then e30 will guaranty that you are getting the most out of your stock car/spark maps that you are given by Ford. Thats it really.

Fuel trims handled it well and were consistently adding 10%-15% fuel at any given airload/pedal position to account for the added E content over the 14.08 OEM stoich point. When tuning was available, I dropped my stoich point to 13.00 in the tune for the rest of the e30 I had in the tank and fuel trims were dead nuts perfect + or - 1%.

e30 was cool to run and helps keep the car honest. Aside from that you are not going to gain anything else unless you have been losing from detected knock on e10 93.

There isnt enough ethanol in e30 blend to add enough cooling to the fuel charge over regular e10 fuel.

Clarity? Premature combustion vs cooling?

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