I was at the dealer yesterday and a salesman was saying that the new GT3 and GT2 will have "Direct Fuel Injection". Can someone enlighten me regarding what that really means? More HP????

TIA

 

The salesman at the Porsche dealership told me expect to see a likely change of the 3.6 to a 3.8 litre on the GT3 and GT3RS pushing around 435-445hp.

 

It means the salesman probably dosent know what hes talking about. lol You gotta give me a call Orli!

-Andreas

 

3.6 Di 435hp

 

no 2009 GT3

 

Are you asking because you're thinking about waiting for an '09 to get one? If so, I wouldn't wait.

1) I's purely speculative if there'll be an '09.

2) Assuming there is one, by the time we get to '09 you'll be wanting to wait for the next gen version of the car (not 997, but 99?). I know I would.

3) DFI has real benefits with one of them being higher compression ratios possible due to the cooling effect of squirting the fuel directly into combustion chamber. On the downside, I have an RS4 which has DFI. Go checkout the RS4 forums about cars having problems with carbon depots building up on the valves because the detergent fuels are not as effective as cleaning the valves because, well, the fuel is getting injected on the other side of the valve so the detergents are not working over as much of the valve as before. I'd prefer to wait at least a year before buying a car having an engine new to DFI. Not suggesting DFI is bad, but after reading about the carbon depost build-up issues on the RS4 motors attributable to the DFI, I'm just a little more cautious about wanting to jump right into owning a DFI car. It'll all be that way soon and as manufacturers gain more experience w/ the technology and perhaps the additives are incorporated into the fuels are revised the problems will all but disappear.

-Roland.

 

This is how DFI works and why it provides 20-40 more HP when compared to "normal" non DFI engines.

B/c a car has more than 1 cylinder EACH each piston at a given time is in a different position in their "cycle" - and they thus need DIFFERENT amounts of fuel and air to provide the most "bang". Currently most engines do not take into consideration these different piston positions and rather they calculate on AVERAGE how fuel the engine needs - some cylinders get more than they need, and some get less. In-efficient and power robbing.

DFI calculates each cylinder's exact piston position at every point in time and squirts in the exact amount of fuel and exact amount of air into each to provide the most efficient "bang".

Porsche's RSR use mechanical injection where each cylinder has a throttle control valve of its own. The road cars only have one throttle control valve for ALL 6 cylinders.

That's basically how DFI works. It also is more clean b/c their is very little unbrunt fuel left over.