E85 and Cats..... keep or delete? Help!

[Jordan @ Lethal]

Let's also bare in mind that the meows aren't the only thing illegal about the cars

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[Adamone92]

Let's also bare in mind that the meows aren't the only thing illegal about the cars

True. And op has working cats anyways so the "repair" issue is non applicable anyways.

 

[Dave2013M3]

That's fairly impressive. Many usually run into issues way before that. I can't tell you haw many times someone has had their high flow cats break within a few hundred miles. One gnarly pull can do it right on the spot. I've been told that the tune can definitely make as well as the green cats but a year and a half is honestly impressive/surprising. Keep us posted if they decide to change their minds on ya.

Jorday, at what E-level do you think this will start to affect cats. I run 2 gallons of E85 (Here in Cali most E85 stations the E85 tests out to E87) with 2 gallons of VP101 Street Blaze to 12 gallons of 91 getting me to a E20. Will this affect my OEM cats?

Thanks in advance..

Dave

 

[Jordan @ Lethal]

Jorday, at what E-level do you think this will start to affect cats. I run 2 gallons of E85 (Here in Cali most E85 stations the E85 tests out to E87) with 2 gallons of VP101 Street Blaze to 12 gallons of 91 getting me to a E20. Will this affect my OEM cats?

Thanks in advance..

Dave

Yep. All ethanol will be causing this reaction with the certain additives in your oil and will slowly degrade or "wash" away the compounds coating the innards of your cats. Since you're running a blend with a low ratio of ethanol, yours will be getting stripped at a much slower rate is all.

 

[Adamone92]

Jorday, at what E-level do you think this will start to affect cats. I run 2 gallons of E85 (Here in Cali most E85 stations the E85 tests out to E87) with 2 gallons of VP101 Street Blaze to 12 gallons of 91 getting me to a E20. Will this affect my OEM cats?

Thanks in advance..

Dave

It could be my lack of understanding..

But i didnt think using e85 with 91 to help octane levels was advised as they have very different stoich values. I thought it should be either straight e85 (or whatever you have)..or mix race gas (the vp101 or sunoco 100, etc) with 91 (pump gas). Am i incorrect in this info?

 

[Jmtoast]

you should already be catless if you can. I've already lost one... I know guys on their 3 or 4th.

 

[WildHorse]

Am i incorrect in this info?

you are correct
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[NGOT8R]

Check this out.

 

[Adamone92]

Check this out.

Alex and Dakota at lund both told me not to mix e85 with pump gas on my 93 tune..my e85 tune (obviously)..as well as my now supercharged 93 tune. My friend @sigintel (who i have learned a LOT from) also has made a post about this before, and advised me not to mix them as an octane boost.

For a flex tune..yeah..itll be fine. But the flex tune isnt meant to be used as anything more than a transition convenience tune.

Like i said i wasnt 100% sure about it. But from my research on the stoich values..fuel trims..and what ive heard from those listed above..e85 as a method of boosting your octane mixed with pump gas isnt a good idea.
Which is exactly why i mix sunoco 100 or boostane with my pump gas until i can afford a fuel system for e85.

 

[NGOT8R]

I get what you’re saying now Adamone92. I can agree with not mixing E85 when the pump gas tune is loaded. From what I understand, it takes about 30% more fuel to run E85 and I dont know if the stock ECU can accommodate that (maybe it can), without some help via adjusting the fuel first to get within the range of the ECU’s capabilities I’m considering purchasing a Whipple for my ride and would like to know if it would be safe to run on the flex tune after first burning through a mix and then filling the tank with E85, or would it be safer to run the E85R tune on a blown car?

 

[Adamone92]

I get what you’re saying now Adamone92. I can agree with not mixing E85 when the pump gas tune is loaded. From what I understand, it takes about 30% more fuel to run E85 and I dont know if the stock ECU can accommodate that (maybe it can), without some help via adjusting the fuel first to get within the range of the ECU’s capabilities I’m considering purchasing a Whipple for my ride and would like to know if it would be safe to run on the flex tune after first burning through a mix and then filling the tank with E85, or would it be safer to run the E85R tune on a blown car?

If you are putting a whipple on your car..no tuner i know of will do a flex tune for you. Too much risk. Make sure your car is drained and good pump gas in it before putting on the whipple. Or go straight e85 with an e85 tune (will require a fuel system if you dont have one) and make sure you have a way to ensure its quality e85. Or do a race fuel tune and run race fuel. Those are your only options when boosted. No flex.

 

[NGOT8R]

If you are putting a whipple on your car..no tuner i know of will do a flex tune for you. Too much risk. Make sure your car is drained and good pump gas in it before putting on the whipple. Or go straight e85 with an e85 tune (will require a fuel system if you dont have one) and make sure you have a way to ensure its quality e85. Or do a race fuel tune and run race fuel. Those are your only options when boosted. No flex.

Copy that! Thanks.

 

[Dave2013M3]

There is no issue of blending E85 with pump gas as long as you don't go overboard. The car is approved for E15 I only take it to E17-E20 and I have had no issues and the car runs great. If you listen to the video he is talking about an E50-E60 on a flex tune.

Dave

 

[Adamone92]

There is no issue of blending E85 with pump gas as long as you don't go overboard. The car is approved for E15 I only take it to E17-E20 and I have had no issues and the car runs great. If you listen to the video he is talking about an E50-E60 on a flex tune.

Dave

maybe so. Im not referencing the video at all though.

ive just been advised by Lund and other people not to mix them like that. At the end of the day they know more about it than I do, and you probably do too.

I just wanted to ask the question because it goes against what ive read and what I was told when I asked. e85 is not the same as race fuel or octane booster and has different energy requirement and stoich values, and doesn't mix well with pump gas especially with a 93 or e95 tune. That's my understanding and what ive been told at least. If im wrong, then ill gladly admit that. Its just confusing to me because I asked that specifically and was told otherwise. Im very curious by nature and like to figure out the true answer to things, especially if im giving advice on it to someone at a later date.

edit: I could also be confusing some of the information with even more so not wanting to do it when supercharged.. idk. I do know that they can run certain numbers from the factory..i just didn't think e85 mixed with pump gas in that way. I didn't really think they mixed at all.

 

[Adamone92]

my buddy mentioned above does have this post
https://www.mustang6g.com/forums/threads/fuel-mixes-for-those-battling-91-oct.91288/#post-2015745

which has e85 as one of the items listed to help bring up the octane with pump gas. However, I cannot speak to if the other items are needed to make them compatible. that goes beyond my knowledge at this time. Im hoping conversations like this can help me expand that knowledge though. Also the matter of making sure its perfect e85 every time comes into play when mixing them. But that's true anytime you use e85.

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