how about F1 using it?
doesn't it help run a higher compression ratio due to charge cooling effect, therefore more power and efficiency?
BMW uses it in their most expensive cars
in fact all their cars use except the M3/M5 and possible the 3.0 engines
the balance do, incuding the XM's
I'll check on MB, but I suspect they do...
yes they use it on current models
as new engines are introduced it is adopted
in fact they built the first DI car 60 years ago
The Third Generation of Mercedes-Benz Direct Injection Systems:
The world’s first gasoline engine with direct fuel injection was the 1954 Mercedes-Benz 300SL Gullwing. Since then, the company has pioneered direct injection for several high-efficiency European models, including the 2006 CLS350 CGI, powered by the world’s first gasoline engine with piezo-electric direct injection and spray-guided combustion. This advanced V6 engine achieved 10 percent better fuel economy versus the normal V6 with port injection.
The fuel system in the new bi-turbo V8 represents the third generation of modern Mercedes-Benz gasoline direct injection systems, and the first to be offered in the U.S. market. System pressure of the electronic direct injection system is similar to less precise mechanical injection systems – up to 200 bar or 2,840 psi. The new V8 makes use of industry-leading electronics technology first used on Mercedes-Benz diesels – piezo-electric fuel injectors that spray gasoline directly into the combustion chambers. In the past, nearly all gasoline engines have used indirect port fuel injection.
http://www.emercedesbenz.com/autos/merc ... v8-engine/
Mercedes-Benz AMG Introduces New Twin-Turbo Direct Injection V8 Engine
The new AMG twin-turbo V8 produces 536 horsepower and 590 lb-ft of torque, while the outgoing engine produced 518 hp and 465 lb-ft
so it looks like MB is 'on board' too,
Porsche is using it across the board, as is Ferrari
hardly paragons of mpg and economy, lol
in fact a clean car will be faster...perceptably? no, but theoretically, yes...
the coking is a consequence of the scoring, not vice versa...
many borescopes have been performed by Audi on RS4's (at least in the US) and coking is not an issue...
SR71 wrote:IMHO, DI is all about emissions and economy...nothing else.
Performance and economy may not be diametrically opposed, but no-one here bought a B7 because its good on the juice or spits out 322g/m of CO2...
The fact that Mercedes and BMW don't use it in their top of the pile applications speaks volumes.
I'm sure they'll become increasingly common as the technology matures and I'm sure the X5M (and no doubt the latest M5) application is yards ahead of the NA V8 in the B7.
Whats funny is that a good proportion of owners here like detailing their car. I'm sure they do it partly for fun, but, I'd suggest, its also to protect the "health" of their investment.
But it makes bugger all difference though to the performance though does it....I mean having a clean car doesn't make you go faster does it?
Yet you have those advocating that it is pointless looking after the internals of their engine (I mean fancy cleaning all that s**t out of your engine) when arguably, it makes a significant difference to its performance!
So why is one important and not the other??!!
From where I see it, an engine that can "destroy" its piston geometry with that amount of contamination in such a short space of time is fundamentally compromised.
It doesn't matter if the effect on performance is negligible because ostensibly when I bought the car I paid as much as I did for super-duper cylinder metallugry and piston design to ensure I had the best.
If a set of old Vauxhall Vectra pistons with 100K miles on them would have done the job, I've been robbed!
