4g63 head swap to 4g64. - Page 2 - Team-2G Mitsubishi Forum

97BlackSpyder · 04-29-2007, 11:07 AM

Nevermind...its not the number of valves thats the problem...the valves in the turbo head are just a tid-bit bigger. My mistake...looks like I'll have a project over the summer afterall lol.

Attack Eagle · 04-29-2007, 04:57 PM

it's all in the timing.
SOHCs can't swirl.

Jaedon · 01-11-2010, 08:52 PM

DOHC adds to the HP over the SOHC. If it did not then we could just pop a turbo on the 4g64 and call it a day. The DOHC IS the reason for the swap as well as the turbo.

Adding a turbo to the 4G64 will bring you to around 200 HP running at 9-10 PSI. Swapping the DOHC on and running the same 9-10 PSI will net you around 260 HP. That is close to a 30% gain right there. Read your tech stuff BEFORE you do the swap to make sure you know what you are getting into. a 260 HP FWD stroker is what you end up with .... which also has more torque than a boosted up 4G63-T. It's all in the cams.

FWIW I am hoping to attempt this swap myself as soon as I find a decent parts car. Need to swap the rear brakes from drum to disc as well to improve the braking since I am planning to put more power to the ground.

spydermanX98X · 02-07-2010, 02:50 PM

way to revive a 3 year old thread! wooohooo I hope that guy was just waiting for an answer since 2007

04-29-2007, 04:57 PM	#17
Attack Eagle Post-Fiend Join Date: May 2005 Location: El Paso TX Posts: 3,050	it's all in the timing. SOHCs can't swirl. __________________ `03 Summit White Tahoe LT LM7, G80, GT4, PDZ, ZW7, G65, PDP, etc. Mutual Admiration Society Member #5

01-11-2010, 08:52 PM	#18
Jaedon New Member Join Date: Aug 2007 Location: Toronto, Ontario, Canada Posts: 18	DOHC adds to the HP over the SOHC. If it did not then we could just pop a turbo on the 4g64 and call it a day. The DOHC IS the reason for the swap as well as the turbo. Adding a turbo to the 4G64 will bring you to around 200 HP running at 9-10 PSI. Swapping the DOHC on and running the same 9-10 PSI will net you around 260 HP. That is close to a 30% gain right there. Read your tech stuff BEFORE you do the swap to make sure you know what you are getting into. a 260 HP FWD stroker is what you end up with .... which also has more torque than a boosted up 4G63-T. It's all in the cams. FWIW I am hoping to attempt this swap myself as soon as I find a decent parts car. Need to swap the rear brakes from drum to disc as well to improve the braking since I am planning to put more power to the ground. __________________ Making Honda owners cry is my favourite past time.

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04-29-2007, 11:07 AM	#16
97BlackSpyder Turbo Tech Join Date: Nov 2005 Location: San Fran, CA Posts: 223	Nevermind...its not the number of valves thats the problem...the valves in the turbo head are just a tid-bit bigger. My mistake...looks like I'll have a project over the summer afterall lol.

02-07-2010, 02:50 PM	#19
spydermanX98X Turbo Tech Join Date: Mar 2008 Location: Naperville Posts: 345	way to revive a 3 year old thread! wooohooo I hope that guy was just waiting for an answer since 2007