i was just wondering what kind of mileage you could get with a new hemi in an A body. i mean hell if the 5.7 can get 25 highway in the challenger its gotta get at least 30 in a dart rite? Not to mention having near 400 hp =P~
I agree, an LX with a decently modded 5.7 can get 25 MPG highway. I've seen similar numbers on 6.1 baised strokers that were settup with MDS. With an A body being over 1000 lbs lighter I think 30 is in range if you build for it. It's really amatter of having a good overdrive ratio and then hooking up MDS in the old school car to get the extra 3-4 MPG thats needed. I think you could do this two ways. First use a factory computer/wiring harness in the install and tune it with CMR and a diablo predator. Second, just run the MDS on a manual arm switch and then use a window switch and pedal operted switch to kick it off if the throttle position exceeds a certain point or the RPM drops below a given level. Far as I can tell you can take the cylinders that are governed by mds and hook the injectors, coils and MDS solenoids up to a relay so it all under manual control with the window and pedal switches making sure you don't forget to disarm and stall it when stopping or try to show off in 4cyl mode. Plus it could be set to hold 4 cyl mode longer which would work with the lighter car so you would probably get more mileage improvement from it this way than the 3 mpg the factory cars are seeing with it.
I've also seen 1-2 MPG improvement with decent ported cylinder heads but usually thats offset with a bigger cam.
My personnel goal for a long time has been to get 30 mpg and 10's quarter miles from my 67 cuda with a 3rd gen hemi. I know it can be done just for me it's a matter of getting the time to finish it.
