K-Factor wrote:OK, I have read this through and I am interested to get clarification TLGF, I also have a gasser, but it is in an L300 (2.4). Is yours the 3.0 V6 or the 2.4 I4?? You say you can cruise at 160kmph!!!!! Mine can't do that! Maybe down a steep hill. Mine also burns an awful lot of fuel. I realize my engine has a few issues and I have the automatic which gobbles up a bit extra, but I can't imagine he 2.4 going 160 without a few mods or a good tailwind. I'd love for you to prove me wrong though, cuz that would mean there is hope for mine!!
I am really interested in doing a head swap from a 12 or 16 valve engine with a single overhead cam (many Chrysler products have this) and on paper it should bump it up to 150hp or so. There appear to be a few problems like the distributor and possible manifold mismatches, as well as tuning/ecu challenges. I have yet to see the parts side by side though.
Anyway, keep the gas talk coming.
KSY
WELCOME TO THE 4G64 CLUB!!! I have one too (MODEL: P04W L300 with 4spd AT, RWD, soon to be LSD rear), but I am located in the USA. I get low 20's highway under normal 50-60 MPH. And yes, it would be possible to get close to that speed (around 90 MPH), and sustain it with a stock 8V head 4G64.
AS TO THE CYLINDER HEAD: It would have to be from cars that have a 4G6x engine, as you know. I will be looking to use the 6/92 to 7/96 Expo/Summit 16V SOHC 4G64 cylinder head. Indications are that it will bolt up to everything with no modifications. It even has the distributor in the same position as the 8V L300 head!
I also have thought about the other heads, but I am fairly certain as you are, that not everything matches up that well.
The only things that may make me retain my 8V head is the fact that right now I am non-interference and if I conclude that the 16V head would hurt my fuel economy. The 16V head maybe a better design, so maybe I could even gain fuel efficacy (combined with 2-1/4 inch high flow exhaust system).
Whenever On-Road and off-road; on duty and off duty, it is DELICA Moment. -CMC
"Practical vehicle fitting wide occasion from personal use to commercial use.
Many can ride / many can be loaded." -Official Mitsubishi L300 product website