Can E85 technically work? - Page 2 - RX8Club.com

Series I Aftermarket Performance Modifications Discussion of power adding modifications
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Can E85 technically work?

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Old 07-19-2018, 11:44 AM
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Originally Posted by trackjunkie View Post
are you talking about the fuel lines and seals? pretty much all newer cars fuel system can handle e85 since pump gas has up to 10% ethanol.
You are right, all newer cars can handle E10 stock.

But concentration makes a difference. Kinda like how nothing is gonna happen if you put your hand in a lemonade(other than wasting some good drink), but if you put your hand in concentrated sulfuric acid, it's not gonna be pretty.

There is a chance, albeit small, that the stock seals can handle E85, but I wouldn't just assume that.

Remember that unless your car is designed/modded to run ethanol fuel, ethanol is actually considered bad for the fuel system and you want to avoid it if you can.

And for premix, I looked up out of curiosity, and some people said you can find some synthetic premix that will work with ethanol fuel, but again, you gotta double check if yours will mix with ethanol fuel.
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Old 07-23-2018, 11:32 AM
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I refined the staging some more I have a little more work I need to fiddle with in the low RPM range but for the most part I am really happy with this.
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Old 07-23-2018, 09:15 PM
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do you have HP graph overlay of pump gas vs e85
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Old 07-24-2018, 10:03 AM
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Not going to have one. The Dyno I did my baseline at sucked and kept cutting out. We are going to a different one to get a e85 baseline. Then when I get time I will switch back to pump and go back to the same place.
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Old 07-24-2018, 09:17 PM
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any issues with cold start on e85? does it take longer to start the car? coming from Evo community, it was common to have cold start issues on e85, but more so when ambient temp was below freezing. in most case, gas stations change e85 to winter blend with lower eth percentage. but i never experience cold start issues with my evo when i ran e85.
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Old 07-25-2018, 01:29 PM
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Originally Posted by trackjunkie View Post
any issues with cold start on e85? does it take longer to start the car? coming from Evo community, it was common to have cold start issues on e85, but more so when ambient temp was below freezing. in most case, gas stations change e85 to winter blend with lower eth percentage. but i never experience cold start issues with my evo when i ran e85.
Cold start is decent for not touching any cranking enrichment yet. Car starts on the second crank but this is simply due to the prime gain being to low and I haven't taken the time to adjust it. Talk to me in October when its like 45 degrees in the morning lol
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Old 07-25-2018, 02:07 PM
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i have track events in march and november in northeast and it's always bellow freezing in the morning.
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Old 07-25-2018, 02:12 PM
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Originally Posted by trackjunkie View Post
i have track events in march and november in northeast and it's always bellow freezing in the morning.
Since I can adjust cranking timing, Cranking fueling, post crank enrichment, and Prime gain (its the first shot of fuel when the cranking is initiated) I dont have any worries getting the car to start on the fist crank. Ill take some videos when I find the time to work on it.
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Old 07-25-2018, 02:15 PM
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i'm using Verastuner on stock ecu. i haven't looked to see if those adjustments are available
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Old 07-30-2018, 10:23 AM
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e85 dyno planned for monday now!
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Old 08-13-2018, 10:14 AM
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Iv ran into some electrical gremlins that I have not been able to solve. Iv got a new engine harness, crank angle sensor, and crank trigger on its way to me.
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Old 09-11-2018, 03:42 PM
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Old 09-12-2018, 07:22 AM
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how does the AFR look
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Old 09-12-2018, 10:53 AM
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Originally Posted by trackjunkie View Post
how does the AFR look

around 13.0 I found that my SSV or VDI was not opening from the last time I had data. So when I went to the dyno I was indeed out of pump and injector. Last night I installed a Aeromotive Stealth 340 and ID1050 Secondaries.
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Old 09-12-2018, 03:07 PM
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for the race class that i'm running in, i'll have to detune to the car to 190 whp max. so i wonder if just after market pump and oem injectors is enough.
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Old 09-12-2018, 03:36 PM
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Originally Posted by trackjunkie View Post
for the race class that i'm running in, i'll have to detune to the car to 190 whp max. so i wonder if just after market pump and oem injectors is enough.
Why would you even consider E85 in that case ? Surely just running stock and on pump gas will achieve that ?
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Old 09-12-2018, 03:38 PM
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Originally Posted by Brettus View Post
Why would you even consider E85 in that case ? Surely just running stock and on pump gas will achieve that ?
Cooling! My engine runs around 1300egts instead of like 1600-1700 with pump gas.. I would think if you detuned the car stock pump and injectors would be fine.
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Old 09-12-2018, 03:49 PM
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Originally Posted by shawnm565 View Post
Cooling! My engine runs around 1300egts instead of like 1600-1700 with pump gas.. I would think if you detuned the car stock pump and injectors would be fine.
Cooling .............hmmmmm .....................there plenty of rx8 race cars around that manage cooling just fine.
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Old 09-12-2018, 04:09 PM
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Originally Posted by Brettus View Post
Why would you even consider E85 in that case ? Surely just running stock and on pump gas will achieve that ?
For more torque and power under the curve. And for cooling. It's not anymore more hassle for me to bring e85 to track. Avg hp is more important than peak power.
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Old 09-12-2018, 09:08 PM
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e85 also burns a lot cleaner, pretty much no carbon deposits at all compared to pump gas.
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Old 09-13-2018, 03:57 PM
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Also why does everyone think that because everyone else does it... its the only way to do things lol just because everyone else jumps off the bridge doesnt mean you have too...
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Old 09-13-2018, 07:42 PM
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Originally Posted by trackjunkie View Post
For more torque and power under the curve. And for cooling. It's not anymore more hassle for me to bring e85 to track. Avg hp is more important than peak power.
Ok ...i think I understand ... You are going to aim for as much power as possible then jack the tune at the top end so it doesn't go over 190 ?
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Old 09-13-2018, 11:34 PM
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Originally Posted by Brettus View Post
Ok ...i think I understand ... You are going to aim for as much power as possible then jack the tune at the top end so it doesn't go over 190 ?
correct, going for as much power as possible low to mid rpm, then close the throttle when it reach 190 whp and keep it there till redline.
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Old 09-14-2018, 01:42 AM
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Originally Posted by trackjunkie View Post
correct, going for as much power as possible low to mid rpm, then close the throttle when it reach 190 whp and keep it there till redline.
It might be as simple as disabling the VDI !
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Old 09-14-2018, 06:33 AM
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Originally Posted by Brettus View Post
It might be as simple as disabling the VDI !
will try that first. i have versatuner, so it shouldn't be hard to change the requested torque table. which ever method will give me the most flat power ban at 190 whp.
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