Trying to switch to E85
12-14-09, 02:17 PM
#1
Trying to switch to E85
I am looking to go E85, My current setup will be 2200cc prims and 850cc sec injectors running on a denso supra pump. My only questions is, I am going to switch fuel lines out to Gates SAE30 R10 now I am unsure of the size I think it is 5/16 is this correct? Is there anything else you think I might need to run E85? New pump station in Pomona 
Mod List
Agressive street port
Apexi PFC
GT3586R
4" smic
Long manifold
tial 44mm wastegate plumbed
3" catless down pipe
resonated mid pipe
Apexi N1 Dual's
twin power
comp fuel rail
2200/850 injec
supra fuel pump
Mod List
Agressive street port
Apexi PFC
GT3586R
4" smic
Long manifold
tial 44mm wastegate plumbed
3" catless down pipe
resonated mid pipe
Apexi N1 Dual's
twin power
comp fuel rail
2200/850 injec
supra fuel pump
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12-15-09, 04:32 PM
#9
I do not really know a whole lot about running E85 but I thought you had to run larger primaries than 850cc's to suppourt that much power? 1000/1300cc?? Like I said I really don't know, but my injector duty cycles are pretty high on pump gas running 850's to acheive that power and I was under the impression you need more volume of E85?
12-15-09, 04:54 PM
#10
I do not really know a whole lot about running E85 but I thought you had to run larger primaries than 850cc's to suppourt that much power? 1000/1300cc?? Like I said I really don't know, but my injector duty cycles are pretty high on pump gas running 850's to acheive that power and I was under the impression you need more volume of E85?
You need 1.3936 gallons of E85 to equal the btu energy of 1 gallon of gasoline. So 850cc injector goes to 1200 and 550 goes to 775; all else being equal. Now all lines, pumps, fuel rails will need to support a 40% flow increase; not trivial.
And as I mentioned above; say goodbye to your engine O-rings. These engines are not designed for alcohol. I even shudder with this E10 crap.
12-15-09, 05:01 PM
#11
better watch out...the government might be changing its stance on e85 pretty soon - you might not be able to find it anywhere...
Ethanol-powered vehicles generate more ozone than gas-powered ones
http://www.newkerala.com/news/fullnews-11730.html
Ethanol-powered vehicles generate more ozone than gas-powered ones
http://www.newkerala.com/news/fullnews-11730.html
Washington, December 15 : A new study has determined that ethanol-powered vehicles generate more ozone than gas-powered ones.
The study, by researchers at Stanford University, indicates that ethanol, which is often promoted as a clean-burning, renewable fuel that could help wean the nation from oil, would likely worsen health problems caused by ozone, compared with gasoline, especially in winter.
Ozone production from both gasoline and E85, a blend of gasoline and ethanol that is 85 percent ethanol, is greater in warm sunny weather than during the cold weather and short days of winter, because heat and sunlight contribute to ozone formation.
But, E85 produces different byproducts of combustion than gasoline and generates substantially more aldehydes, which are precursors to ozone.
The study, by researchers at Stanford University, indicates that ethanol, which is often promoted as a clean-burning, renewable fuel that could help wean the nation from oil, would likely worsen health problems caused by ozone, compared with gasoline, especially in winter.
Ozone production from both gasoline and E85, a blend of gasoline and ethanol that is 85 percent ethanol, is greater in warm sunny weather than during the cold weather and short days of winter, because heat and sunlight contribute to ozone formation.
But, E85 produces different byproducts of combustion than gasoline and generates substantially more aldehydes, which are precursors to ozone.
12-15-09, 09:11 PM
#13
better watch out...the government might be changing its stance on e85 pretty soon - you might not be able to find it anywhere...
Ethanol-powered vehicles generate more ozone than gas-powered ones
http://www.newkerala.com/news/fullnews-11730.html
Ethanol-powered vehicles generate more ozone than gas-powered ones
http://www.newkerala.com/news/fullnews-11730.html
EDIT: ok that was easy enough, I found the article. The article has very little discussion of actual tailpipe emissions--they assume that E85 has worse emissions and then make a bigass model based on their assumptions. I am looking through their source data on actual tailpipe emissions right now. It appears to be some obscure work from 1998 using primitive 90s emissions controls.
sorry for the threadjack.
to the OP, you really should consider running smaller primaries and larger secondaries. huge injectors like that are very unresponsive. There's a reason why mazda when from two 680cc injectors on the series 3 non turbo fuel injected cars to four 460cc injectors on the series 4 non turbo cars.
12-16-09, 04:58 AM
#14
https://www.rx7club.com/3rd-generation-specific-1993-2002-16/e85-few-other-questions-573922/
If the motivation for E85 is resistance to detonation, it seems like water/methanol injection would give you that with much less hassle.
If the motivation for E85 is resistance to detonation, it seems like water/methanol injection would give you that with much less hassle.
12-16-09, 07:57 PM
#16
dorito powered
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sorry I couldn't resist.
OP: you will more than likely need a second fuel pump. RX7store sells twin pump assemblies.
12-16-09, 08:13 PM
#17
Full Member
Sounds like more trouble than it's worth to have an RX that smells like mcdonald's when it's running. E85 does not make as much power as gasoline, so your will need...more fuel. Some of Mazda's concept cars run on E85 with 500+hp. So it's fiesable, but will be a lot of work. Godd thing is that you can switch between gasoline and E85 with a simply MAP change.
Good luck, let us know how you do!
Good luck, let us know how you do!
not quite.
