The plan is to start with a straight swap - 3L block, LIM, UIM, PCM, fuel pump - scavenge oil
pan/pickup and timing chain cover from 2.5. I'm planning on sticking with as close to the stock
3L as possible because by my reading of the dyno results nobody except DavidZ has really been
able to get more than a bit beyond the stock power/torque until after 5000 RPM - head work
(including SVT cams) helps a lot between 5000 and 6700, but that's a lot of extra work and it
increases the probability of having to move to some sort of aftermarket engine management
(I like the idea of being able to at least start with a PCM that the calibration engineers spend
their thousands of hours on).
Huh?
Why do you think you need to use a 3L PCM and Fuel pump?
I got 240hp using my stock stuff...
Of course there is some complexity to be suffered - first I need to switch to a returnless fuel
system - swap fuel pumps and there will have to be some rejigging between the fuel supply
line and the rail on the LIM. I'll also have to go through the wiring diagrams on the PCM to make
sure that there is a 1:1 correspondance between the pins - I can either move to the 3L
harness if there are too many changes or stick with the stock harness and perhaps a few
custom routings. And then there's the IAT that needs to be moved from the top of the UIM.
Why do you need to switch to a returnless fuel
system?
