[oldman]

Originally Posted by JANNETTYRACING

It may be the perception because GM did it it must be better.

But you must take in to account that Manufactures make decisions based on available technology and cost involved, it may be just cheaper to add port injection rather than redesign the direct injection then get it through the EPA when they can use already approved systems and just stack them.

You will make more power and more reliable power with Direct injection than Port injection.

The Parts are coming you just have to be patient

Ted.

I base this on three points:
it gets very expensive to inject fuel into the combustion chamber. I have many years of diesel racing. Also the parts start wearing out because now you got more lift, more lobes, more pressure, more stroke. Last there is atomization problems with holes that are too large and very short injection windows, not important on a race car, very important on a DD.

There is a benefit to dual inject, the valves should be cleaner.

For me looking at it, I think I was just fixated on E85 because I already have done the conversion. I'm completely happy with my current setup and may never go to a pulley bigger than 4.5 on my D1X (7 PSI). The car is traction limited to about 80 MPH of so. It would be interesting to put the LT4 stuff on and inch up to see how much more HP the car will do with E60 or E85 on 7 PSI. I don't know, Ted any ideas?

All the money I save I can sell my ported MSD and go to a Goetz intake, just becuase it is such eye candy...