Pros and Cons of going E85
Apr 26, 2011, 01:58 PM
#61
In the technical world high impedence, saturated injectors, operate completely differently than low impedence, peak and hold injectors.
In case your wondering what the evo does its a hybrid system using a low Z injector with a resistor pack for use with a saturated driver. Its basically an adaption for putting low Z injectors on a high Z circuit.
Low 1.0 - 4.0 ohms (Peak and Hold Driver/Injectors):
Essentially these injectors use ECU control to "jolt" the injector open with high current then holding a lower current until the ECU closes the injector. In this setting the wire is dead until the ECU supplies voltage. Unfortunately since these coils are low Ohms they use much more current than high ohm coils.
Advantages of this design:
faster reaction time (~1.5ms)
Disadvantages of this design:
increases coil heat
High 10 - 16 ohms (Saturated Circuit Drivers/Injectors):
Unlike the peak and hold the saturated circuit doesn't care about current limiting it just connects and disconnects power. It relies on the ohms of the injectors to prevent the current from killing the driver circuit.
Advantages of this design:
reduces heat
Disadvantages of this design:
slower reaction time (~2ms)
In case your wondering what the evo does its a hybrid system using a low Z injector with a resistor pack for use with a saturated driver. Its basically an adaption for putting low Z injectors on a high Z circuit.
Low 1.0 - 4.0 ohms (Peak and Hold Driver/Injectors):
Essentially these injectors use ECU control to "jolt" the injector open with high current then holding a lower current until the ECU closes the injector. In this setting the wire is dead until the ECU supplies voltage. Unfortunately since these coils are low Ohms they use much more current than high ohm coils.
Advantages of this design:
faster reaction time (~1.5ms)
Disadvantages of this design:
increases coil heat
High 10 - 16 ohms (Saturated Circuit Drivers/Injectors):
Unlike the peak and hold the saturated circuit doesn't care about current limiting it just connects and disconnects power. It relies on the ohms of the injectors to prevent the current from killing the driver circuit.
Advantages of this design:
reduces heat
Disadvantages of this design:
slower reaction time (~2ms)
Apr 28, 2011, 09:10 AM
#63
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Cons- ****ty gas mileage, cold starts, e85 isn't available year round, most of the time it's actually e70 for cold start purposes, not to many stations so you have to drive out your way just to fill up. Road trips are a huge hassle. Frequent oil changes/spark plug changes.
Apr 28, 2011, 09:36 AM
#64
Cons- ****ty gas mileage, cold starts, e85 isn't available year round, most of the time it's actually e70 for cold start purposes, not to many stations so you have to drive out your way just to fill up. Road trips are a huge hassle. Frequent oil changes/spark plug changes.
Having an E85 station nearby should be a key decision on whether to run it. If I had to go more than 15 minutes out of my usual driving pattern to fill up, I would not be running E85.
Jan 23, 2015, 07:14 AM
#68
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Injectors are a must. You usually see people get 1000cc injectors which would support any future mods also. You also need a fuel pump that would be rated for E85. Depending on how much boost you want you probably also want to get a new diverter valve, 3 bar map sensor, & grimspeed boost controller.
Mar 12, 2015, 08:36 AM
#72
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Mar 12, 2015, 09:11 AM
#73
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If I'm in daily driver mode, I get 200 miles per tank. When I ran pump gas, I would get 240 miles per tank. Not such a huge difference. I've got no prob with cold starts in the winter, and the stations in my area all serve true e85 year round (verified with my ECA). For road trips with no E85 along the way, I flash back to a pump gas tune. I change the oil every 3000 miles with E85 or pump gas. No probs with spark plugs. The last time I touched mine was 2 years ago.
Having an E85 station nearby should be a key decision on whether to run it. If I had to go more than 15 minutes out of my usual driving pattern to fill up, I would not be running E85.
Having an E85 station nearby should be a key decision on whether to run it. If I had to go more than 15 minutes out of my usual driving pattern to fill up, I would not be running E85.
I have a hard time with "daily driver" mode. It usually lasts about 15 miles, and then braaaapppppp...lol.
I get 200-220 miles on 91 driving to the fuel light, and 150-170 on E. The price point doesn't quite make up for the mileage reduction. So I'm dual mapped and typically drive around on 91, but its easy to switch to E when I want more power. Cruising on freeway road trips at 75-85 I get 280-300 miles on a tank running deep into the fuel light. On E, I usually just let the car run out of fuel because I carry 5 gallons with me going to/from cali, and it'll go 240-260 miles.
Fuel mileage is really the only "con" with E. You will fill up more often, and at least in Vegas its only 30 cents cheaper per gallon, with gas at $3-$3.50, its only 10% cheaper and doesn't make up for the 20-30% mileage reduction.
Mar 12, 2015, 10:52 AM
#74
I have a hard time with "daily driver" mode. It usually lasts about 15 miles, and then braaaapppppp...lol.
I get 200-220 miles on 91 driving to the fuel light, and 150-170 on E. The price point doesn't quite make up for the mileage reduction. So I'm dual mapped and typically drive around on 91, but its easy to switch to E when I want more power. Cruising on freeway road trips at 75-85 I get 280-300 miles on a tank running deep into the fuel light. On E, I usually just let the car run out of fuel because I carry 5 gallons with me going to/from cali, and it'll go 240-260 miles.
Fuel mileage is really the only "con" with E. You will fill up more often, and at least in Vegas its only 30 cents cheaper per gallon, with gas at $3-$3.50, its only 10% cheaper and doesn't make up for the 20-30% mileage reduction.
I get 200-220 miles on 91 driving to the fuel light, and 150-170 on E. The price point doesn't quite make up for the mileage reduction. So I'm dual mapped and typically drive around on 91, but its easy to switch to E when I want more power. Cruising on freeway road trips at 75-85 I get 280-300 miles on a tank running deep into the fuel light. On E, I usually just let the car run out of fuel because I carry 5 gallons with me going to/from cali, and it'll go 240-260 miles.
Fuel mileage is really the only "con" with E. You will fill up more often, and at least in Vegas its only 30 cents cheaper per gallon, with gas at $3-$3.50, its only 10% cheaper and doesn't make up for the 20-30% mileage reduction.
Last edited by mrfred; Mar 12, 2015 at 10:56 AM.
Mar 12, 2015, 11:23 AM
#75
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Vegas is pretty flat. I can definitely blame my fuel mileage on how I drive..