Nothing impressive here IMO.
Big Turbo 4 cylinder cars, that are tuned correctly almost ALWAYS get better gas mileage than stock.
Why? Because the larger aftermarket Turbo spools a lot slower, and consequently isn't generating boost during anything below say 4-5000 rpm. No boost/ no fuel consumption.
This is from experience. My BT cars have always gotten a few MPG more than stock. Its not rocket science..
You'll hear "zoom-zoom-boom" stories (as the kids like to call them) from owners who have no mechanical sympathy or don't know how to properly modify a car, but in stock form, the engines are fine, less the typical direct injection issues (valve build-up and PCV adventures).
Early cars had some defective high-pressure fuel pumps, too. Nothing like what BMW dealt with, especially since even some owners of cars with HPFPs didn't even notice there was a problem until they started tuning and were monitoring their fuel pressure. The very first batch of cars was recalled due to an improperly-torqued transmission mount, which led to engines literally falling off the driver's side mounting position. No bueno. Needless to say, Mazda took care of that very quickly.
Lot's of dumb in here. A whole barrel full o' stupid.
Not impressive? Never use it? Who are some of you? 40mpg and the ability to lay down 640hp? This can only be awesome. If you don't think so, something's wrong with you. You hate progress. Go join your grandparents at the next tea party rally and hang with your idiotic peers that hate modern society, or join the Quakers. Jesus Christ.
My buddies '05 Mustang has a Kenne Bell 3.2 and puts down 540rwhp. It has the ability to also get 26mpg. Do any of you think he drives it at 10/10ths all the time? Of course not, sometimes it's on the freeway, not in boost and getting good mpgs. How can there be anything wrong with that? If he could attain 40mpgs you damn well better believe he's going to try for it. It's sometimes just as fun to be frugal as it is to roast tires.
Once again, for the ump-teenth time, some of you TCL'ers amaze me with your incompetent nonsense and unceasing stupidity. Feeling that you need to broadcast these asinine thoughts for everyone to see is just the proverbial cherry on top of the retard sundae.
This is clearly not aimed at those in here with level heads. I apologize for the rant, but I couldn't hold it in!
Try staying out of "the loud pedal" on a very high HP car.
From experience high HP is intoxicating. Try staying out of boost on a long highway drive. Its not easy; with that screaming Turbo, and whistling WHOOSH calling your name.
Easier said than done
The personal parking lot is a bit mixed, the daily drivers are diesels with 6mts, the toys are 2-strokes, the sleds have the only automatic transmissions I've ever owned. The only 4 stroke gasser in the house is the lawnmower.
DI is the future has more precise fueling control. The OEM will all be DI to meet the strict emmissions and EPA mpg standards. GM just announced the next generation of small block Chevy coming in the new 2014 PU will ALL be DI Bob G
Read below about mine and other fsi stage 3 owners bad experience and poor results with APR and there Stage 3 Kits. http://forums.vwvortex.com/showthrea...ge-3-dyno-runs
Actually what's sad is that according to a few of the tech articles I've read, we would still have learn-burn engines in America if they would have regulated gasoline to the same standard as diesel. The absolute legal limit on ULSD is 15ppm, but from what I've read, the true average is around 10ppm. Meanwhile gasoline is still something like 50ppm, although I keep finding conflicting things online. Anyway; what I do remember is that the bottom line is that sulfur is a poison to catalysts, especially in lean operation. If they would regulate gasoline to the same sulfur standard as ULSD then we should be able to get lean burn gasoline engines in America that still pass emissions.
It would be win-win over time.
1) Lower sulfur means less junk going into the gas, meaning cleaner exhaust coming out of it.
2) Ability to do lean-burn increases gas mileage, reducing cost
3) Lower green-house gas emissions per mile
It all starts with refining the sulfur out of gasoline to an equal standard with ULSD (10ppm avg, 15ppm maximum).
(A) A modified 4 cylinder Turbo car, with a larger (read much laggier) Turbo; will almost ALWAYS net a significant increase in gas mileage while driven out of boost. Nothing impressive about it...
(B) That although the car MAY be capable of returning high MPG highway figures (in theory); the reality is that one stab of the accelerator on a long drive is all it takes for those DUAL Bosch 044 pumps to suck down gallons of petroleum, and force it down a length of '6 AN fuel line, to the fuel rail, to a set of HUNGRY 1000cc-1600cc injectors, and totally negate any perceived 'mileage master' dreams you were entertaining.
So "don't hit boost" you say? You try not hitting boost, on the highway, in a BT 4 cylinder car, that makes all of 100 HP TOPS below 5000 rpm.
You want to pass or accelerate briefly? You have (2) options.
(1) try to wheeze by in a 3000+ lb car with 100 HP out of boost, during "mileage master mode".. Good luck with that
(2) drop a gear, pour on the boost, and put your eyeballs in the back of your head as you accelerate like a slug from a 45.
Thats it.. There is very little power modulation in a BT car. All or nothing, like a light switch.
I've owned, and built a few BT cars, and I love them. What are YOU going to school me on? Im all ears chump..
No one is saying that a high powered car capable of getting 40 mpg will ever attain that average mpg, or even get it over sustained periods.
No one is saying that this 40 mpg is possible while pumping out the highest levels of power.
The part you need to get through your thick skull is that those times of efficiency is what prevents it from sucking "down gallons of petroleum" at every given moment.
You cannot reconcile how making more power with bigger injectors and a higher flow pump can result in a car that returns higher efficiency on the road, even though you said yourself that you've had cars that did exactly that.
It's quite obvious you pay no attention whatsoever to the technical aspects of autosports because you should already know that fuel efficiency at part throttle is a big deal. Aside from drag racing, there's a lot of modulation of fuel efficiency. That's what wins races and championships. Audi and Audi race fans know all about that. There's even more opportunity for fuel efficiency in a road driven car.
The problem you have is that while you understand maximum fuel consumption, you can't understand the benefits of all the other states. Let me try to explain it: Average real world fuel consumption is a result of zero and maximum fuel consumption rates and everything in between. Improving all those parts in between is what results in increased fuel efficiency.