Can someone develop an E85 flex fuel package for the Gen V PLEASE????

[Bruce]

Being also an owner of a GT-R, I'm aware of how easy it is to gain big power running E85 on an GT-R. You just need larger fuel injectors, bigger fuel pumps, and a tune to run E85. Better yet add an ethanol content sensor along with maps to take care of different mixtures of E85 to Premium Unleaded, then you pick maybe 100 HP+? I bet the Gen V can pick up the same HP with injectors, fuel pumps, ported intake, headers, and exhaust. And if done this way, there's no need for the added weight of turbos or superchargers. I'll be perfectly happy with 750 NA HP with insane throttle response. Someone better crack that upcoming Mopar ECU to load flex fuel tunes onto it quick...

[Viper Girl]

Bruce,
I think EdwardTraylorIII in FL is running E85... I'll see if I can get him to chime in here.
Kala

[Voice of Reason]

Forced induction applications benefit a lot more from E85 than naturally aspirated. For them it allows boost and timing to both be turned way up. For us it would allow some more timing but I bet 20 hp would be the max from it.

[Will at RSI]

Our Gen 5 tuning options are flex fuel capable.

[Nine Ball]

E85 won't be worth much on a non-boosted setup. The reason E85 picks up a lot on turbo/supercharged cars is because they can increase timing and boost safely, which is where the real gains are.

[Viper Girl]

Ed's Viper is a twin turbo, so all that makes sense in re: E85... Thanks for teaching me something new!

[Black Pearl]

A stock naturally aspirated will not make a noticeable difference. Could even be worse than using premium gas.

[mnc2886]

A stock naturally aspirated will not make a noticeable difference. Could even be worse than using premium gas.
The current tune already is very conservative with knock so running e85 might certainly end up making less power than 93 would. E85 really only benefits a boosted car and I believe it is due to an increase in air flow as well as better control over the airflow that allows the timing to be advanced aggressively.

[EdwardETraylorIII]

Hey Guys (and girl)! :)

It would be expensive to convert a naturally aspirated gen IV/V car to E85. However, if you don't want to get into the motor, then it might just be for you!

As the OP astutely noted, it makes all the sense in the world to convert a forced induction motor over to E85. However, it doesn't always make sense on a naturally aspirated engine. Luckily for us, the more cubic inches you have, the more gains you will see by being able to advance your timing (Speaking in general terms, of course) thanks to that 105 Octane E85!

We have 512 cubic inches, so we definitely do see some very real and measurable results from converting to E85. This stands especially true for the Gen V guys due to much better heat dissipation in the heads (thanks to the improved design) resulting in the ability to run even more timing on the G V platform.

If I wanted another 75-100 RWHP over stock (and I liked E85/had access to it) and I didn't want to get into the motor, then this is what I would do:

Order the new off road PCM ($900)
Order some Bad Boys Garage new Production shorty race headers from Toddy($4K) (these are a thing of beauty... Not only do they flow well, they are GORGEOUS!)
Order Will's (at RSI) E85 fuel system (800-900 RWHP capable system is plenty - I know he has a couple of options you can choose from to achieve your goals- roughly $1300 with the aeromotive regulator and fuel rails)
Miscellaneous fuel system fittings and hoses ($500)
Order some FAST 90 injectors ($550)
Have it tuned ($500ish)

That's roughly $7700...

I am confident you could achieve 630 RWHP with a *conservative* E85 tune. Pull the cats and you could get 650 *conservatively* ALL day.

The *ONLY* drawback is that the car will consume about 30% more fuel when running on E85. The car was already thirsty from the factory, so you will see yourself at the pump a bit more often than you'd like (but that added performance is SO worth it!!!).

Oh, and the car smells like a brewery... But is that really a bad thing????????? :)

I've done E85 conversions on many many late model cars (CTS-Vs, C6 Z06s, Ford GTs, Supras and Lambos) both NA and boosted applications - so if you have any questions, then please feel free to ask.

[mnc2886]

Hey Guys (and girl)! :)

It would be expensive to convert a naturally aspirated gen IV/V car to E85. However, if you don't want to get into the motor, then it might just be for you!

As the OP astutely noted, it makes all the sense in the world to convert a forced induction motor over to E85. However, it doesn't always make sense on a naturally aspirated engine. Luckily for us, the more cubic inches you have, the more gains you will see by being able to advance your timing (Speaking in general terms, of course) thanks to that 105 Octane E85!

We have 512 cubic inches, so we definitely do see some very real and measurable results from converting to E85. This stands especially true for the Gen V guys due to much better heat dissipation in the heads (thanks to the improved design) resulting in the ability to run even more timing on the G V platform.

If I wanted another 75-100 RWHP over stock (and I liked E85/had access to it) and I didn't want to get into the motor, then this is what I would do:

Order the new off road PCM ($900)
Order some Bad Boys Garage new Production shorty race headers from Toddy($4K) (these are a thing of beauty... Not only do they flow well, they are GORGEOUS!)
Order Will's (at RSI) E85 fuel system (800-900 RWHP capable system is plenty - I know he has a couple of options you can choose from to achieve your goals- roughly $1300 with the aeromotive regulator and fuel rails)
Miscellaneous fuel system fittings and hoses ($500)
Order some FAST 90 injectors ($550)
Have it tuned ($500ish)

That's roughly $7700...

I am confident you could achieve 630 RWHP with a *conservative* E85 tune. Pull the cats and you could get 650 *conservatively* ALL day.

The *ONLY* drawback is that the car will consume about 30% more fuel when running on E85. The car was already thirsty from the factory, so you will see yourself at the pump a bit more often than you'd like (but that added performance is SO worth it!!!).

Oh, and the car smells like a brewery... But is that really a bad thing????????? :)

I've done E85 conversions on many many late model cars (CTS-Vs, C6 Z06s, Ford GTs, Supras and Lambos) both NA and boosted applications - so if you have any questions, then please feel free to ask.
How would you tune it? The new off road ECU is plug and play only, no tuning.

[Viper Girl]

ETIII has worked his way into the stock ECU... At least that is something I *think*, his car may have possibly done on another planet in some distant Universe..

I'm just guessing here, since we have not seen the new off road ECu that it has similar capabilities.

[EdwardETraylorIII]

mnc2886,

There are a number of ways to make E85 work on the G5 platform. I believe you'll see a couple of tuning options for the off road unit very shortly. Also, I have it from high authority that you'll see some tuning options released for the factory unit relatively soon.

It's definitely been done. I can tell you this with 100% certainty. :)

[mnc2886]

mnc2886,

There are a number of ways to make E85 work on the G5 platform. I believe you'll see a couple of tuning options for the off road unit very shortly. Also, I have it from high authority that you'll see some tuning options released for the factory unit relatively soon.

It's definitely been done. I can tell you this with 100% certainty. :)

That's exciting if it comes to fruition. Just remember most of us on the forum are jaded over promised tuning since the Gen IV. I'll be optimistic though, especially reading what you've already done.

[Back In Black]

Order some FAST 90 injectors ($550)


I've done E85 conversions on many many late model cars (CTS-Vs, C6 Z06s, Ford GTs, Supras and Lambos) both NA and boosted applications - so if you have any questions, then please feel free to ask.

Fast 90 fuel injectors? More info please.

What size are the stock Gen IV fuel injectors? To run E85 I would need a 30-40% larger injector yes? The question then is larger than what?

Is there a drop in fuel pump available that can handle the extra flow?

I've dabbled with E85 on a couple of my cars in the past. One was a Viper. Both forced induction. No question E85 proved it's worth. The fuel system mods required were fairly easy but extensive. I've been toying with the idea of trying it on my Gen IV. Without being able to bump up the compression, I don't expect great results but it would be an interesting experiment nonetheless.