7g: Best Power Adding Mods + misc. hardware

[mko]

This thread is created to inform and explain what power modifications can be done to a 7g Galant. Please post a short explanation and picture to clarify what the modification improves. Please do no ask questions!!! For more info please check out the tutorial section.

INTAKE


Short Ram Intake

Adapter is needed for the MAS sensor

Minimal gains. It's located in the hot engine bay.

Cold Air Intake

You'll see more gains than short RAM. Easiest way to make is from intercooler pipes or customized from another car.

Throttle Body

Galant's stock TB is 48mm. 60mm TB off 1g Eclipse will introduce more air into the engine.

Since the connectors for idle control are different and Mitsubishi TBs are known for their idle surge, a FIAV block off plate is needed to make your idle nice and smooth.

EXHAUST


Headers

Available off 4g63 1g Eclipse. These are not bolt on to the Galants stock catalytic converter.

High Flow Catalytic converter

Available from 2 1/4 to 3'' diameter. Will reduce the pack pressure when turboed. The only con is the it will light up your CEL for rear oxygen sensor.

Cat Back Exhaust

Available from 2g Eclipse /exp. AWD/ from 2 1/4 to 3'' diameter. Requires a little extending for perfect fit.


Turbo Chargers and Components

Turbo Chargers

13g

Available off 1g Eclipse automatic. Cons: 5 cm housing, very, very restrictive. Pros: super quick spool up, full boost at around 2k. The turbo is good for low end power.

14b

Available from 1g Eclipse 4g63T with manual transmission nand USDM 6g VR4s. Cons: small 6cm housing, very restrictive. Pros: quick spool up. Turbo is good for low to middle range power.

16G
Variations: small 16g , big 16g, super 16g

Available from JDM 6g VR4, Evo 1-3. Pros: large 7cm housing, less turbo lagging. Turbo is spooled by 2800-3000 rpms. Good for mid range power.

Aftermarket turbos:

Gaskets







Oil Feed Line



DSM Manifold

Available from:

1g Eclipse : 2'' outlet
2g Eclipse 2 1/4'' oulet

Evo 3 Manifold

Available from Evo 3 2.5'' outlet, better flow

Stainless Steel Tubular Manifold

Available from Ebay 2.5'' outlet Cons: cracking

DSM turbo housing

6cm inlet

7cm turbo housing

7cm inlet

DSM O2 housing

1g Eclipse 2'' inlet 2'' outlet
2g Eclipse 2 1/4'' inlet 2 1/4'' outlet

Evo 3 O2 housing

Larger inlets and outlet than DSM housings 2.5'' inlet/outlet

Stainless Steel O2 Housing

Megan SS Tubular O2 housing outlet: 2.5''

Open Dump Tubular housing outlet: 2 1/4'' or 2.5''

SS tubular O2 housing outlet: 2 1/4'' or 2.5''


Downpipe

Available from Ebay. Inlet: 2.5 - 3'' Outlet: 2.5 - 3''

Porting and Polishing

DSM O2 housing ported to 2.5'' inlet/outlet

DSM manifold ported to 2.5'' outlet



DOHC SWAP



Oil passages needed to be plugged. 4g63 head does not use these.

Camshafts

Available from many suppliers and durations: 264, 272, 280, 288. Stock 1g Eclipse with manual transmission are 252/252; with auto transmission - 244/244. 2g Eclipse manual/auto 252/252

Head Gasket and Bolts



Timing Belt and Gears

Either adjustable cam gears or 1994 Galant GS timing gears.

Unfortunately, there isnt a super strong t-belt for 4g64. Only stock available off 1994 Galant GS

Valves



Valve Guides



Valve springs and Retainers

OEM upgrade for DOHC - Evo 8 springs and retainers

Aftermarket



3rd Gen Lifters



Valve Stem Seals



Cyclone Intake Manifold



Sheet Metal Intake manifold



Porting and Polishing


ENGINE


Pistons





Connecting Rods



Crank Shaft



Bearings and Bolts



Evo 3 Oil Housing

Allows to run external oil cooler on 7 bolt block.

Balance Shaft Kit

Reduces rotational weight. Engine will rev faster and higher.

Pulleys

These reduce rotational weight. Engine will rev faster.


DRIVETRAIN

5 Speed Swap

Transmission off 2g GST or 7g Galant

Clutch Kits

Exedy



Act




Flywheels

Fidanza 8 lbs



Act 12.5 lbs




Transmission Oil






Limited Slip Differential

Full



Insert




Full Transmission Rebuild Shepherd Transmissions, Jacks Transmissions, DogBox Transmissions


AWD conversion Every part comes off 2g GSX


SUPPORTING MODS

Intercooler, Pipping, T-Bolt Clamps and Silicone Couplers /Reducers/




Boost Controller

Electronic





Manual




Blow Off Valve /BOV /




Fuel Pump and Filter






Fuel Pressure Regulator /FPR/

OEM off 2g Eclipse GST or GSX

Aftermarket






Injectors

OEM upgrade

Blue tops DSM 450cc



Yellow Tops Evo3 510cc



Aftermarket: Denso, PRE........ACCEL


High Speed Fans




Aluminum Radiator




Fuel Controllers


MAFT





SAFC I, II, Neo

SAFC II



Neo




Stand Alone Engine Controller

AEM EMS



Megasquirt





ECU+

DSM Link

more....

[kamenfaiz]

Bow to the brothers

Thanks for write up

[phizzalot]

NICE MKO don't forget Evoscan/Ecuflash for tuning and evo8 ecu compatibility...

[TheOnly1ever]

Hey just wondering if I put some EVO 3 injectors in my 4g63 N/A would I need to upgrade anything else for it to perform properly? Like airflow meter?

Thanks

[Boosted]

No, not unless you are running an engine management system.

[Joker96]

I need power asap am auto so first step would be go manual?? I got cai, 2.5 full exhaust and no balance shaft still too slow i need sonethign beter and i i plan to go turbo, manual tranny would be a priority right?

[keith6110]

damn! How did I miss this write up? Good job!

[98mgalant]

Do the headers need to be from specifically a 1g eclipse or will any 4g63 header work?

[mko]

do you know of any other 4g63 N/A cars?

[98mgalant]

Idk that's why I asked.lol

[eclipsh]

The only way to make much power on a 4 cylinder is to rev it to the moon or go forced induction.

I'm sure someone has built a destroked NA (naturally aspirated) '64 at this point. That would be the way to get high revs. I'd be trying to hit 10-11k which would require some serious work to the tranny too. The plus side is the tranny is less likely to break so long as the shift forks are tough. NA motors are also very responsive. The downside is that it would be very expensive for not a lot of power.

Forced induction is the only way to make substantial horsepower. It can also be made relatively cheaply. The downside is it is less responsive than an NA. Some of the same tricks for NA apply to FI engines, ie: cold air intake, larger throttle body, higher flowing exhaust. Turbo engines make more power down low which is hard on gears but easier to shift.

The information on a limited slip differential is very important for FWD cars. Without one you'll just smoke one tire and not accelerate. The inserts are not recommended by Team Rip Engineering, a specialist in DSM transmissions. The reason is that they wear out your front differential and can cause failures that take out the rest of the transmission. If you plan on staying FWD do it right and go for a clutch or mechanical LSD such as Kaaz or Quaife.

[mysticj]

The only way to make much power on a 4 cylinder is to rev it to the moon or go forced induction.

I'm sure someone has built a destroked NA (naturally aspirated) '64 at this point. That would be the way to get high revs. I'd be trying to hit 10-11k which would require some serious work to the tranny too. The plus side is the tranny is less likely to break so long as the shift forks are tough. NA motors are also very responsive. The downside is that it would be very expensive for not a lot of power.

I'm working on it on the NA part... The long rod combo on the 2.4L is good for 9K rpm just need very good cams with a rapid ramp rates like JUN 272 or Kelford 272, along with a good header and IM combo.

The information on a limited slip differential is very important for FWD cars. Without one you'll just smoke one tire and not accelerate. The inserts are not recommended by Team Rip Engineering, a specialist in DSM transmissions. The reason is that they wear out your front differential and can cause failures that take out the rest of the transmission. If you plan on staying FWD do it right and go for a clutch or mechanical LSD such as Kaaz or Quaife.

An Evo I-III Front LSD from Ralliart or FTO LSD but their are hard to find and expensive.