e85 questions

[Purist]

Originally Posted by series420

another thing i should mention is, i intend on using this vehicle for SCCA autocross.. I will have to get high flow cats sadly

Do they check emissions or what?


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[churchx]

They might simply require for car to be street legal. And that includes passing emission tests. I don't get "sadly" bit though. I certainly don't want for all cities to be full of smog and be glad about it.

[Purist]

Originally Posted by churchx

... I don't get "sadly" bit though. I certainly don't want for all cities to be full of smog and be glad about it.

True, but E85 is up to 85% ethanol, which doesn't produce oxides of nitrogen when it burns. So it might still pass with no cat.

Anyone...?





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[gen3v8]

Originally Posted by Purist

True, but E85 is up to 85% ethanol, which doesn't produce oxides of nitrogen when it burns. So it might still pass with no cat.

Anyone...?





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The gas content of it will still make NOx,Wont it?

[ermax]

Originally Posted by elBarto

You can change the "Cranking Fuel Injector Pulse Width" tables in RomRaider/ECUTek, In an old Wayno topic are the values.
Mine started in -10°c (14°f) on first crank.

An extra con of E85 (ethanol in general), it's hygroscopic, meaning it attracts water. But that can be fixed with daily driving it.

Yep I spent a few years dealing with starting problems but finally got a chance to play with the cranking tables and now it starts first try all the time. I’m in Florida and the lowest I’ve cranked it since the change so far was 38F. Before the adjustments it took two starts once the temps dropped bellow 60F.

[Purist]

Originally Posted by gen3v8

The gas content of it will still make NOx,Wont it?

Yes, of course. But only 15 % of what 98 would. I was wondering if that might be sufficient to pass emissions.

Do cats remove 100% the NOx?

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[ermax]

Speaking of bad gas mileage. I just calculated my MPG on a full tank and got 18.9mpg on E85. I mostly drive my car like I stole it so I’m sure I could do better but I’m curious what others are getting.

[Purist]

Is this the relevant clause?

Street Touring X Class: The "precat(s)" and primary catalytic converter may all be replaced by a single converter, provided the resultant configuration meets Federal emissions inspection standards at normal vehicle operating temperature."

Disclaimer: I don't even live in the states. Just curious.

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[Qwimby1]

Originally Posted by ermax

Speaking of bad gas mileage. I just calculated my MPG on a full tank and got 18.9mpg on E85. I mostly drive my car like I stole it so I’m sure I could do better but I’m curious what others are getting.

That's about what I get and I drive abut the same as you. Dead stock except for a Borla axleback. I would advise anyone

considering a switch to make sure there's a reliable source of it nearby. There is only one station that carries it in my town. If I go on the road I carry 4 gallonsw in the truck. A great many stations that show it online don't really have it. Of course I carry the OFT in case I have to switch back.

[series420]

Originally Posted by Purist

Is this the relevant clause?

Street Touring X Class: The "precat(s)" and primary catalytic converter may all be replaced by a single converter, provided the resultant configuration meets Federal emissions inspection standards at normal vehicle operating temperature."

Disclaimer: I don't even live in the states. Just curious.

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aye the rules for street touring specify

"Catalytic converters: Any catalytic converters are allowed, but must attach within 6” (152.4 mm) of the original unit. Multiple catalytic converters may be replaced by a single unit. The inlet of the single replacement converter may be located no further downstream than 6” (152.4
mm) along the piping flow path from the original exit of the final OE
converter. The extents of an OE converter are defined by the expansion
chamber in which the catalyst is contained, regardless of placement
within larger exhaust sections. Replacement converters must have a
minimum catalyst density of 100 cells per inch and minimum substrate
length of 3” (76.2 mm)."

[Purist]

Originally Posted by series420

aye the rules for street touring specify



"Catalytic converters: Any catalytic converters are allowed, but must attach within 6” (152.4 mm) of the original unit. Multiple catalytic converters may be replaced by a single unit. The inlet of the single replacement converter may be located no further downstream than 6” (152.4

mm) along the piping flow path from the original exit of the final OE

converter. The extents of an OE converter are defined by the expansion

chamber in which the catalyst is contained, regardless of placement

within larger exhaust sections. Replacement converters must have a

minimum catalyst density of 100 cells per inch and minimum substrate

length of 3” (76.2 mm)."

[QUOTE=series420;3410833]aye the rules for street touring specify

Sounds like the catted headers you were planning are allowable,

(I'd confirm that in the tracking forum) a stated increase of 14 bhp at peak, add E85 for another 20. You won't know yourself!

Don't waste your money on a cat back or axleback, they add 2-3 bhp at most.

Something no one tells you about E85... It has a strange smell...



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[spcmafia]

Jumping on this thread for some additional info. I just found out there's a navy base near me that has E85, apparently 85%. Currently running JDL UEL Catted headers with full rest of exhaust, stage 2 OFT. I should probably get a Flex Fuel kit. I was reading on a past thread that there's a way to use 85 without the kit, involves something among the lines of running for about 2-3km at low RPM until the LIFT values increase to a certain degree, then stop the vehicle, load E85 Tune, and let the ECU learn the new tune slowly. Figured, while I still can, use my military ID and get gas whenever I need it. Any more additional info would be great.

[gen3v8]

Originally Posted by spcmafia

Jumping on this thread for some additional info. I just found out there's a navy base near me that has E85, apparently 85%. Currently running JDL UEL Catted headers with full rest of exhaust, stage 2 OFT. I should probably get a Flex Fuel kit. I was reading on a past thread that there's a way to use 85 without the kit, involves something among the lines of running for about 2-3km at low RPM until the LIFT values increase to a certain degree, then stop the vehicle, load E85 Tune, and let the ECU learn the new tune slowly. Figured, while I still can, use my military ID and get gas whenever I need it. Any more additional info would be great.

That`s it Just make sure you are as near to empty as possible first. Last time i switched to e85 the engine was stumbling before i put the tune in. The e85% increases with the next fill as the gas gets cleared out. If you go a distance and may run out of e85 keep your oft with you for an emergency switch back tune to gas.

[Purist]

https://r.tapatalk.com/shareLink/top...ink_source=app


How to run E85 on stock 86 BRZ FRS with OFT tune

I have been doing this for over 3 years. Zero issues. Never going back unless I can't get it. Then I just flash back to 98. 5 minute job.

If you want peace of mind, keep an eye on your ignition advance multiplier. If it drops below 1 it means it's detecting knock. (It won't)

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