??? DSI Injectors ???

[dkswim]

dose anybody know what the limitations of the fuel system on the MS3 is? as in how much horsepowere it can safely handel. Tank you in advance of any light that can be shead on this subject

 

[zoom-zoomhatch]

I've talked to someone at CPE and they told me about 300, I asked about their turbo upgrade and that's what sparked that conversation. Not many people have gotten over that point so we'll see in the future I'm sure.

 

[zoom-zoomhatch]

Double post

 

[Refonbass]

the limit of the stock fuel system is not the injectors, but the high pressure fuel pump. The injectors are nowhere near max duty cycle yet. Hopefully someone comes up with a solution for the fuel pump though, because until then its gonna be hard to get too much past the 300whp mark.

 

[clos561]

na i think u can get closer to 350

 

[dkswim]

what can the injectors support (safely)??? oww yeah i was forgetting abolut how much more pressure the pump has to supply compared to manifold injectors

 

[clos561]

im not sure that is just a guess...safely i would say 300-350 meaning nothign will break while u drive.. protegegarage has the xede with clsoe to 300 to the wheel and he hasnt ran into problems...and with full tbe it would push u over 300

 

[Abaddon]

a big issue we will run into is the actual fuel volume entering the combustion chamber. With direct injection, there is basically no time (0.04s at 2000rpm, 0.005s at 6000rpm) for the fuel to mix with air. This is the fundamental reasion why our cars are running rich already...

There is just going to be a physical limitation to the whole direct injection thing that will hold us back. Is it 300hp? 350? 400? Doesnt matter how much pressure you put behind it (and I dont believe there are many aftermarket DI injectors on the market), at one point the engine just wont be able to mix enough air in to get a full burn. Its more then just the fuel system though. The angle of the injector, the heads, valve locations, and even the piston shape play a major role in this.

Unfortunitly, its going to take trial and error to find out for sure.

 

[Haltech]

Well youre correct about pressure. However, you forgot about volume and thats the killer. We need more volume and an inline pump is going to take care of that problem. Its interesting to see how much power our injectors can support as is. Does anyone know the CC ratio of our injectors stock?

 

[dkswim]

well thanks all