lets talk natrually aspirated
Realistically i know i wont be pushing any hard 230+whp on this theory build, but some where around 180+ seams very possible.
Im trying to give a theory set up for a street able build
so lets start with the options of the 2.4 4g64
4g69 crank shaft+connecting rods- these parts are lighter then the 4G64's and fits right in.
I/H/E- these are the basic bolt-ons. you may hear some people say it wouldnt make horse power but the truth be told it will.
Outlander TB- Im not sure if this is a hp gain but it its a tougher throttle body. From pictures seen it looks to be shorter then the galants. note: shorter runners= more hp and longer runners= more torque
G4JS pistons- these pistons are from the Hyundai sonata and they have a higher compression then our stock pistons. Ive read on club3g some where the engine compression would change from 9.0:1 to 11.0:1 but im not to sure on that.
stage 1-2 RPW camshaft- RPW is the only company that makes them for galants.They come in bunch of profiles offering more horse power vs more torque etc for the different stages they have. This is where the camshaft will help the high comp pistons, I/H/E make there hp gain.
Adjustable cam gear- this will help you get your cam set where it makes its most power with out going through the trouble of taking things off to move the cam.I believe AEM makes one for the 4G64
engine management- getting the A/F ratio close as possible to stoichiometric will give great gains compared to a untuned engine. there many other tunable things as well which idk about at the moment.
In theory 190-220 WHP 170-190 WT
2nd option G4JS engine
Its basically a 4G64 with DOHC and a 10.0:1 compression ratio.
this is the set up i would like to run since it requires less work.
4g69 crank shaft+connecting rods
I/H/E- CAI, ebay header ,high flow cat and muffler
Camshafts- Evo cams would work as i remember. To make more power i would set a new red line at 7k from the previous 6.5k and find cams that fit that profile.
Adjustable Cam gears- ?
engine management
theory whp- 170-200
3rd option 4G64 dohc swap
4g69 crank shaft+connecting rods
Dohc swap- G4JS
Comp pistons- G4JS
I/H/E
Camshafts- same as option 2
Cam gears- evo adjustable cam gears.
engine management
4th option 4G69 block 4G64 SOHC head.
The 4G69 from the ralliart lancer and 9g galant is basically a 4G64 with mivec and a 4G63 deck height. The difference are the piston size is 67mm and i cant remember the stroke but its smaller then the 4G64 100mm. and some weight reduction done to some parts.
so in theory if the bottom end could bolt to our 4G64 heads you have
a bottom end that would like reving to 7k better then the 4G64.