Originally Posted by
Johnathansgalant
So you want to turbo the 4G64?
by johnathansgalant » Mon May 25, 2009 8:55 am
I am by no means an expert but I know what I know so I have gathered information and added some so that we can make a sticky or something that people can come too to find out what fits the 8g. Everything I list in this doc is known to fit but I only know mitsubishi facts and nothing about garrett and the T3/T4 hybrids or any style other than MHI flanges. Hopefully someone can add that to this to cover both bases. AS USUAL, I TAKE NO RESPONSIBILITY OR LIABILITY IF YOUR MOTOR BLOWS UP OR YOUR CAR CATCHES ON FIRE FROM ANY INFORMATION ON THIS POST. IT IS YOUR RESPONSIBILTY TO READ AND RESEARCH THOROUGHLY, HOW ALL THESE ITEMS WORK AND INTERACT BEFORE YOU SLAP IT ON YOUR CAR. FUEL BURNS AND IGNITES VERY EASILY SO MAKE SURE YOU INSPECT ALL YOUR WORK IN THE FUEL AREA INCLUDING ADJUSTABLE FPR, FUEL RAILS, INJECTOR SEALS, FUEL PUMP LINES AND FUEL PUMP ASSEMBLY TO MAKE SURE YOU DONT HAVE ANY LEAKS. EVERYTHING WORKS BUT IF INSTALLED IMPROPERLY THERE IS NO TELLING THE END RESULTS.
So you want to turbo the 4G64? This guide is for 8g Galants from years 99-03. In this guide we will basically spoon feed you what you can use to turbo charge your car. This document is ever changing because obviously, something new comes along every day. This guide will be a compilation of info provided by numerous members of TGC, Club3g, Evolutionm, Galantforums, Dsmtuners and plenty other useful sources. Thanks to everyone that contributed and continues to advance the 4G64 platform.
Exhaust Components
Turbo:
There are so many choices to choose from where does one start? Well, we are going to list what fits and you are going to decide for yourself what your goals and needs will be.
To start, the Mitsubishi turbo line is a great start and has plentiful choices that are available. Weakest to strongest the most common turbos are: T25, 14b, 16g, 18g, 20g. This list is not all the Mitsubishi turbos and there are subsets of some of these turbos which may or may not be discussed further. All of the listed turbos will fit provided you have the correct manifold. The compressor housing for these turbos should be the TDO5, TDO5H, TDO6 housings and the exhaust housings are very similar with different size exhaust ports such as 6cm, 7cm and they all fit Mitsubishi style flanged manifolds (Without Twinscroll).
Exhaust Manifold:
99% of all manifolds made for the 1g turbo eclipse and 2g turbo eclipse will fit your car. Manifolds designed for 4g63 turbo engines from 1990 to 1999 will fit. Manifolds designed for the Evolution 8 and 9 will fit also. You must select the right turbo/manifold combo as they are specific to each other. The Evolution 8 and 9 exhaust manifold comes stock with a twin scroll design and is different than any of the other Mitsubishi turbo line. This manifold and turbo selection will run into the starter so you must use at least one manifold spacer milled at a slant to position the turbo upward away from the starter. Some people have used two spacers and some have used one milled spacer. This requires replacing your studs with longer studs to be long enough to fit the spacers.
DSM or 1990-1999 Eclipse 1990-1994 Laser, Eagle Talon AWD or FWD
All manifolds will fit with stock specs meaning the turbo is put in the stock location or close too. You will have to unbolt and flip the turbo180 (flip it around so the exhaust side is toward the passenger side) so it will fit and allow room for intake and o2 housing to fit. ***O2 sensor may not fit if everything is assembled and you try to screw it in(will run into power steering pump). Try to put the O2 sensor in the o2 housing prior to bolting the system to the head or manifold. It should allow for near perfect fit with no problems.
Evolution 1-3
All these manifolds will fit and the Evo 3 manifold is beefier than the standard DSM manifolds. It is suggested to get an EVO 3 manifold because it is not prone to cracking and has slightly larger ports plus it has a 7cm turbo flange for better top end power.
Evolution 4-8
These, as I mentioned earlier need manifold spacers to clear the starter with a turbo fitted. You can try RRE for these spacers.
O2 Housing:
1990 – 1999 Eclipse or DSM or Evo 1-3
All these o2 housings will fit when using a Mitsubishi turbo such as T25, 14b, 16g, 18g. There are more variants but these are the major and most used turbos. Special note is that Evo 1-3 is not the same as 90-99 dsm o2 housing in that, the angle of the downpipe flange is different. The evo 3 has a more aggressive angle and points more towards the turbo than the standard 1g and 2g eclipse. Evo 3 o2 housing also requires a slightly larger than stock exhaust flange when building or buying a downpipe.
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