Any one else running E85 in there BP/ BPT

[MD323]

My only consideration towards E85 was for a track only car with boost and a good dyno tune. Even then the biggest benefit would be the tax credit :p

[1992tracerlts]

Yeah i put it in and then drove right down the street and added fuel. i have a innovate Lc-1. It was at 18.1 when i put it in when it was previously at 14.7. So i added about 30% more fuel and now idle is at 14.7 again and wideopen back at 11.4. The lc-1 reads the same regardles of fuel type because it uses lambda. That stinks that you cannot get E85 its nice. I never even thought about it till one of my friends that runs E85 said why dont you run it you are only at 50% duty cycle on them injectors lol.

IIRC what jon is trying to say is that unlike normal gas 14.7 A/F=1 lambda where e85 9.8 A/F=1 lambda. And if I remember right you should have a 42% bigger injectors for e85. I started researching this and I didnt bookmark the damn page that had lots of good info lol.

just did a quick search and found some of the info i read before http://forums.turbobricks.com/showth...=73061&page=10

Fuel ........................ AFRst ........ FARst ....... Equivalence Ratio ... Lambda
Gas stoich ................ 14.7 .......... 0.068 ................ 1 ................... 1
Gas max power rich .... 12.5 .......... 0.08 ................. 1.176 .............. 0.8503
Gas max power lean .... 13.23 ........ 0.0755 .............. 1.111 ............. 0.900
E85 stoich .................. 9.765 ....... 0.10235 ............ 1 ................... 1
E85 max power rich ...... 6.975 ....... 0.1434 .............. 1.40 ............... 0.7143
E85 max power lean ..... 8.4687 ...... 0.118 ............... 1.153 .............. 0.8673
E100 stoich ................ 9.0078 ...... 0.111 ............... 1 .................... 1
E100 max power rich .... 6.429 ........ 0.155 .............. 1.40 ................ 0.714
E100 max power lean .... 7.8 .... ...... 0.128 .............. 1.15 ................ 0.870

[BlackMazdaMx-3]

I know that the A/f ratios are different the lc-1 reads lambda so you tune for the same number regardless of fuel type. Trust me the tune was lean as hell when i first filled up on E85. I can switch the lc-1 to read alcohol afr but much simpler to just leave it alone. I have 600cc injectors,aftermarket rail and regulator. The factory fuel hose should be able to take the e85 when they engineered the hoses for 10% ethonol they over enginered it. Should be fine my friend has been running e85 on his talon for quite a while with no problems. I guess we will see. Im useing a jns knock sensor kit that my buddy has to verify no knock. It has quite a bit more power already and havent even hit the knock threshold.

[Lex]

Good to hear about the good results Troy. Glad to hear you are enjoying the MS as well!

[FE3-323]

meh, i like economy when im not beating the piss out of the car. i'll stick to my petrol thanks

[Shades]

thanks for the new sig quote!

Damnit, I'm just giving away sig quotes... you and Turpro. LoL...

Wow, my wideband is not wide enough to tune E85... I get between 10 and 20 for A/F.

So since E85 you have to have bigger injectors and dump 42% more fuel in, which works out to be the same... why would anyone be using that? Is it more for the less chance of detonation? Cause you're not using less gas but just a more "environment" friendly gas.

[1992tracerlts]

Damnit, I'm just giving away sig quotes... you and Turpro. LoL...

Wow, my wideband is not wide enough to tune E85... I get between 10 and 20 for A/F.

So since E85 you have to have bigger injectors and dump 42% more fuel in, which works out to be the same... why would anyone be using that? Is it more for the less chance of detonation? Cause you're not using less gas but just a more "environment" friendly gas.

Its a higher octane. You know the rest.

[therieldeal]

http://en.wikipedia.org/wiki/E85

Depending on composition and source, E85 has an octane rating of 100–105[12] compared to regular gasoline's typical rating of 85–93.

...'nuff said?

[protégébob]

The joys of living in the cornbelt! Troy, I've gotta see your setup, I'm just on the other side of the river.

[Shades]

What aboot a 50/50 mix of normal high octane with E85?

[therieldeal]

why?

then your target AFR would depend on the exact mix you happen to be running... which will be hard as hell to control

[fastiva604]

Damnit, I'm just giving away sig quotes... you and Turpro. LoL...

Wow, my wideband is not wide enough to tune E85... I get between 10 and 20 for A/F.

So since E85 you have to have bigger injectors and dump 42% more fuel in, which works out to be the same... why would anyone be using that? Is it more for the less chance of detonation? Cause you're not using less gas but just a more "environment" friendly gas.

yes it is, you would basically leave the wideband calibrated for gasoline and tune it to the same target air fuels as you would if you were running gasoline. say you pour in e85 and tune it to 11.5 on your wideband your real afrs are going to be somewhere in the high 8's or something like that. does that make sense

its kinda confusing.. anyway just leave everything calibrated the same and tune it like you would normally with gasoline and you'll be fine

[BlackMazdaMx-3]

yes it is, you would basically leave the wideband calibrated for gasoline and tune it to the same target air fuels as you would if you were running gasoline. say you pour in e85 and tune it to 11.5 on your wideband your real afrs are going to be somewhere in the high 8's or something like that. does that make sense

its kinda confusing.. anyway just leave everything calibrated the same and tune it like you would normally with gasoline and you'll be fine

Exactily what i am doing. Working great. I would not see any reason to mix if you can fully tune the car for E-85 why not. The extra octane is great.

protégébob Give me a call some time this weekend and i will come on over to CB. Im usually over on broadway on friday nights at the sonic. Ill Pm you my number.

[yunvmyegt]

ya , ya, old thread, bla bla, hows the system holding up? ill be tuning for e85 soon as i get ms in.... what ms are you using, care to take screen shots of your fuel and timing maps for something to go off? any other info you learned you care to share with us??

[BlackMazdaMx-3]

ya , ya, old thread, bla bla, hows the system holding up? ill be tuning for e85 soon as i get ms in.... what ms are you using, care to take screen shots of your fuel and timing maps for something to go off? any other info you learned you care to share with us??

Fuel system is still holding up just fine. Walbro 255 pump, stock lines, m-tuned miata fuel rail, 600cc deatschwerks pnp injectors, aeromotive fpr.

I am useing a ms1 extra code, with vaf delete and idle control.

I have not have any problems with the car since i switched to e85.

Here are My fuel and timeing maps my car makes 22psi max boost. They may or may not work with your car it should get you close tho.

That is a dyno tuned fuel map for my car. Ignition was all done on the street. Made 300hp and 330tq on this map.

It will run pretty lean during cruiseing conditions helps with fuel mileage.

Just zoom in to 200% to see the maps%.

Good luck