4g63t help needed !!!!!!

[Garage Dweller]

O.K...I have been doing some more research, mainly on engine selection. I have taken Paul's (RCR owner) advice and looked into the 4G63T. I like the price, and the fact that upgraded HP/performance parts are available. What I am afraid of is " crank walk ". How big of an issue is it ? Are there better years to select? From what I can find the 6 bolt are the good ones. 7 bolt bad. Is there anything that can be done to prevent this? The next ptoblem is that all of the JDM engine trans combo units that are available the trans are AWD. Can I just "plate off" the take off points where the drive shaft mounts or will I need to purchase a FWD domestic trans? Also, I have looked everywhere for the weight of a 4G63t, not much luck... Another thought, what needs to be done to get about 300-350 hp out of these engines, what is the cost? Can a stock clutch and trans hold up?:run:

What do you suggest? :wave:

TIA

[mrgsdsjg]

I'll try to help you out with this as I use to be a DSM'er. (Correct me if I am wrong anyone)

The 6-bolt was not prone to crank walk like the 7-bolt, you should be fine supporting +350 HP on the 6-bolt. The 7-bolt I wouldn't want to push more than 250 HP out of, although it may hold up fine at higher HP being that it is in a lightweight car which will move through gears fast. As I understand it, crankwalk happens grandually due to torque when the motor is under load (WOT). Imagine the crank being pushed sideways as the motor is running and that is crankwalk. I would get a 6-bolt to be on the safe side if I were you.

As far as getting more than 350 HP, it wouldn't take much. Most of the easy HP adders you will have to buy anyways to complete the install (I.E. custom intercooler piping, larger intercooler, higher flowing exhaust, high-flow fuel pump). With a 16G or larger turbo, downpipe, boost controller, and fuel management/programmer you should hit your goal. All could be found used for less than $2K in good condition. Stock clutch may need to be replaced at these levels, but the transmission should hold up fine.

I am not too familiar with the JDM motors, but I believe the AWD transmission is preferred since it is suppose to be stronger. Just remove the transfer case and cap off the extra outputs.

Now for my $.02: Although I never had a problem with my DSM, these motors are prone to breaking down. I had my DSM three years, from 50k miles to 110k miles, and never had a problem. Then again I only had small MODS pushing about 220 FWHP (on a 7-bolt)... Just beware that you may have problems with it. Even though I am a DSM fan and I love these cars/motors, I am planning to use a GM LNF motor for my planned future build... G/L!

[Garage Dweller]

HHMMMMM.............Everything sounded good untill the problem part. I am NOT into jacking with crap once it is done.

O well, I was just trying to figure this out so I could lay out the engine "bay". No big deal, it's not like have nothing else to work out.

Thanks

[mrgsdsjg]

Sorry if I scared you away from the 4g63, I just wanted to warn you of potential reliability issues. G/L with whichever motor you choose! :spin:

[VR4 Shaun]

I am not too familiar with the JDM motors, but I believe the AWD transmission is preferred since it is suppose to be stronger. Just remove the transfer case and cap off the extra outputs.

This is false. In order to coerce an AWD Mitsubishi transmission into driving only the front wheels the center differential has to be welded solid or the viscous coupler has to be removed and a solid piece put into it's place. If this is not done the transmission will send all of the torque through the easiest path possible which would be the output shaft to the transfer case, which would not be present in a FWD configuration.

Crank walk also seems to affect the 7 bolts that have been ran with an aftermarket heavy duty clutch. The engines can still crank walk with the factory clutch but the high pressure clutch accerbates the problem.

[Garage Dweller]

So... Having said that, is there a difference in the North American trans as far as bolting up to a JDM engine or is it a bolt to bolt swap? Also is there a difference in quality as far as engine and trans., JDM vs North American?

[VR4 Shaun]

There are no DSM's in Japan. The 4g63t engines and transmissions that are imported are from Evolutions 1 through 3 and Galant VR4's. The Galant VR4 is a numbered and limited edition vehicle in North America but in the Asian and Australian markets they were produced in more quantities.

The short answer is YES. Any transmission from any 4g63 will work with any other 4g63. There are other engines in the 4g6X family such as the 4g64 and 4g61 that also share the same bell housing bolt pattern.

[Garage Dweller]

Great news, sounds like options are a plenty.
Thanks