We tested a race car with port injection and direct, 6 cyl 3L.
the port inj car gets 14,5 psi at 2900 rpm, the direct inj 2000rpm.
Same car with VVT and same 64-65lb/min turbo!

 

Ummmm...better write up?

 

 

All I wanted to say is that direct injection helps with spool... on the one car I know it helped with 900rpm....

 

your going to have to be way more specific about your test for anyone to believe anything you just said. what engine? what manifold for both tests, how was the test conducted, did you block off the direct injection ports when you did the port injection? what are your scientific theorys as to why changing the injector location would spool a turbo 900 rpm faster...

 

Same car.... 335 BMW.... single turbo... ecu Motec M880 and then M1(i think they call it.) Same boost 14.5 psi. The car comes with DI STD but the m880 could not drive the DI. So motec has a DI ECU/EMS now. When the port injection was on the car the DI injectors was left into place. DI runs stock oem manifold. Turbo... secret! Fuel pressure 150 BAR(2175 psi)

I will try and post the dyno graphs.... these are many times confidential.

Dyno was a Dynapack

 

150 bar of fuel pressure gives me a boner.

 

2100+ fuel pressure.... what is this diesel?

 

Direct injection has very high fuel pressure. And along with it comes the most ureliablr fuel pump ever placed on a car. Haha

 

direct injection may be the future. but its a long way from being common. and there is no after market for it. most engines cant be converted since it requires installing and injector into the combustion chamber. and since you are injecting fuel directly into chamber there is quite a bit in piston/chamber design that needs to be different.

direct injection is awesome principle. since detonation is the result of fuel being over heated or over compressed or both, those problems are eliminated with DI. honda has designed DI engines that run 60/1 air fuel ratios. oil politics keeps the cool stuff off the market

 

On the 335I the injectors seem to be +1000cc. We tested E50 with a 65lb turbo 14.5 psi and we are at 34% duty cycle.

 

wound be nice if a evo engine could be converted to DI

 

2,000PSI of base fuel pressure sounds incredible. Also 60:1 AFR?

I try to keep up with car tech but damn this is paranormal stuff to me,

 

Detonation is impossible since the fuel is injected on the compression stroke. There's nothing to pre-ignite!

What fuel pressure are the 1000cc injectors rated?

 

Current running 150BAR.... pump can push upto 200bar