Zeniceguycrx

Textbook says about half

accordepicenter

its somewhere in there guys. You can run crazy boost and crazy compression ratios with E85 though, less heat is produced and detonation is quenched pretty good

Zeniceguycrx

great fuel but just no reasonable for daily driving, emagin putting in 80 L to fill your civic? what would that weigh

accordepicenter

it really is better than running race gas on a daily basis though. The fuel mileage wont be great but the cost of the fuel is alot cheaper than race fuel, but less power too. Its not a bad daily driving thing if you can get it. My big gripe with E85 is that it is corrosive like nobodys business, so itll eat up a stock fuel system/pump and lines badly, o rings and hoses etc etc

DrSeuss

Pretty much every VW is now an FSI engine. It allows a lean burn by keeping all the fuel rich charge near the spark plug and injecting it just moments before ignition. Only problem i can forsee is fitting a spark plug, injector, at least 4 decent sized valves into a combustion chamber. Its going to pose a limit on valve area hurting the max cfms the head can flow.

The next big step is solenoid actuated valves, giving you infinitely variable cam timing. A more primitive system is used by Audi and BMW (valvetronic) to replace the throttle body.

tman6919

Yeah, I think automotive technology is going to advance like crazy in the next 5-10years.. Since gas prices are projected to rise slowly but surely in this time period every manufacturer is going to have some means of getting better millage while sill appealing to the performance enthusiast.

check this out this is BMW's next standard engine 306 hp and 400 Nm of torque on a biturbo inine 6 that gets the same millage as the current inline 6

http://www.greencarcongress.com/2006...veils_new.html

Chris Harris

Valve opening is controlled by the ECU, eliminating the need for a TB... Dr Suess put it more eloquently than I.

Racintweek

that would be nice to just throw some trumpets on the head, then tune. no more need to buy cams, tb or anything

Racing

FWIW weŽve had E85 as an "emission friendly" fuel at the pumps since a number of yrs back over here.
Us boosted boys indeed turn to it.
An NA engine tho..fugedaboutit.

True..methanol has approx half the energy content of gas measured in BTU(british thermal units)
However,ethanol burns with different properties than methanol and hence..the not so vastly increased fuel consumption.
However.
This to a great extent relies on that cars in general have engines that are really overpower to propel them for a given speed= we waste fuel doing so.

Nah..i seriously doubt that E85 will knock out gasoline any time soon.
Reasons are plentyfold.
For instance..might be somewhat more enviroment friendly as a BURNT fuel,but it SURE as hell is a VASTLY bigger hazard in liquid form.
Anyone ever burnt E85 out in the open?
If not..please do.
One of the reasons for it being "85%" is that it need to have a visable flame if things go to hell in a handbasket,and now the idiots around here wanna start putting E100 at the pumps as well.

If you wanna look into a highly efficient boosted car that runs E85 all the time check;
www.limmet.se
Guy is Swedish,but..my bet is that heŽll answer any questions you might have in english just as well.

norwegian cRxXx

They do have a throttle boddy (except for those who use the intake valve instead, valvetronic), but when the engine is in lean burn mode the throttle is wide open, and the output power of the engine is limited by the amount of fuel that is injected, just like on a diesel engine. The air/fuel mix is stoich right in front of the spark plug, but the total lamba in the combution chamber is like 2,5:1 (Honda has an engine the can go to AFR's of 64:1). Open throttle means no energy is lost in the "pumpe losses" (the gasoline engine normaly has "breathing troubble" since the throttle is almost closed nearly all the time). But the engine only is in lean burn mode as small part of is "life", low rpm, and like 20% throttle opening (city crusing).

The reason engine manufactures want high CR is not for more power, it's for better MPG. This is one of the biggest advantages of the Diesel engine. Higher CR meens better fuel efficensy.

The biggest reason why E85 ain't the future is that it is not possible to make enough ethanol for the entire world. The only reson "the world" wants to use E85 is the emmissions (lover CO2). If you put 5% ethanol in ALL of the gasoline that is sold, the enviremental gain would be bigger than if a few people run on E85. E5 is comming more and more.

I think many of the "future" cars will be Diesel-electro Hybrids.