Debating engine swap. Wanting input

[kage_maru189]

I have a 1989 Chrylser Conquest/Mitsubishi Starion. The oil pump has recently dropped out on my g54b. This will be the 3rd time something major has failed on this engine and I'm becoming tired of this. Parts are becoming more scarce for this vehicle and so I've decided that it's time to swap. I've been looking around this site and started looking into the 4g64 destroker. I like what this is capable of and had a few questions concerning this.

1. So this engine is : 4g64 block, rods, and crank with a 4g63 DOHC and crankshaft? (is this correct?)

2. Does the 4g64 have the same aftermarket background as the 4g63?

3. I've heard that when you use this 4g63 crank you have to use a "custom" rod and piston mix. What is the best mix of rods and pistons?

4. What year 4g64 block and 4g63 DOHC cylinder head bolt up? If the 63 head is off of a 6 bolt and the 64 is a 6 bolt they should bolt right up?

5. Can I take the motor mounts from a d50 (what year?) and mount the 4g64 into my starquest?

6. The modification of relocating the throttle body to the rear is an absolute have to thing? Or can I just lengthen the wiring harness and my throttle cable?

7. Can the 4g64 wideblock be found in any other vehicles? (I want the wideblock not the narrowblock? correct me if I'm wrong.) Should my km132 bolt up no problem?

8. How do you know a 6 bolt pattern from a 7 bolt pattern without actually looking at the back of the crank? (I ask cause I already have a 6 bolt Fidanza that I want to just swap over)

9. Would I use the 4g64 ecu for this? What other electrical would I need for this swap?

10. I've heard many problems of having the rubber timing belts break and you have catastrophic failure. My friends 1st gen eclipse did this mutltiple times. How is this preventable?

11. Does anyone know of any other mixture of engines that I could look into?

[Mad Menace]

I have a 1989 Chrylser Conquest/Mitsubishi Starion. The oil pump has recently dropped out on my g54b. This will be the 3rd time something major has failed on this engine and I'm becoming tired of this. Parts are becoming more scarce for this vehicle and so I've decided that it's time to swap. I've been looking around this site and started looking into the 4g64 destroker. I like what this is capable of and had a few questions concerning this.

1. So this engine is : 4g64 block, rods, and crank with a 4g63 DOHC and crankshaft? (is this correct?)
4g63 crank with 12mm LESS stroke = de stroker

2. Does the 4g64 have the same aftermarket background as the 4g63?
depending on generation Yes and no.

3. I've heard that when you use this 4g63 crank you have to use a "custom" rod and piston mix. What is the best mix of rods and pistons?
Stock pistons and rods work fine, unless your creating a powerhouse!!!

4. Did the 4g64 come DOHC?
Yep. 94 Galant GS

5. Can I take the motor mounts from a d50 (what year?) and mount the 4g64 into my starquest?
FAQ covers this one completely

6. The modification of relocating the throttle body to the rear is an absolute have to thing? Or can I just lengthen the wiring harness and my throttle cable?
Want your intake in the cab of the car? cause thats where it will be if you dont mod it, also theres some water fittings that need relocated to the front of the head

7. Can the 4g64 wideblock be found in any other vehicles? (I want the wideblock not the narrowblock? correct me if I'm wrong.) Should my km132 bolt up no problem?
I cannot answer this one, but the narrow and wide only affects the the bellhousing width and transmission options

8. How do you know a 6 bolt pattern from a 7 bolt pattern without actually looking at the back of the crank? (I ask cause I already have a 6 bolt Fidanza that I want to just swap over)
if someone knows I want to know too

9. Would I use the 4g64 ecu for this? What other electrical would I need for this swap?
if you get the one from the same car as the motor and the harness YES it will work until you turbo it

10. Does anyone know of any other mixture of engines that I could look into?

this is the 4g6* club

[shroder15]

I was under the impression you cant just use stock rods/pistons with a Destroker motor as you are changing the stroke. Feel free to correct me, but beyond that, I cant recommend a piston/rod combo for you.

[kage_maru189]

Would it be easier to just get a 4g63 wideblock DOHC or a 4g64 wideblock DOHC rather than messing around with the destroking proccess? The only difference between wide block and narrow block is just the transmission mounting distance correct?

I was just told that if the 4g63 came out of a dsm with an automatic tranny it was also a wide block (13.25) and a narrow (12.25) if it had a manual tranny. Can anyone confirm this?

What exact make and models can I find the 4g64 and the 4g63 wide block in? I've looked at the list on the site but I can't just go to my local junkyard and say I need to see all your cargo vans. EDIT I think I just answered my own question I'll post the list I found in another post as it's pretty large.

Has anyone ever pulled off mounting the km132 to a narrow block? How about cutting off the bell housing from a d50 and km132 and welding it on? That would make the km132 a 12.25 wouldn't it? Then you just treat it like a d50 set up?

Could you take a narrow block and mount .5" brackets to the block (to make up for the extra 1'' difference (12.25 - 13.25)) and match around to mate the km132 bellhousing and then custom dust covers to protect the flywheel? Rather than custom bellhousing you make a custom block bolt pattern by extending brackets out to mate the wide tranny to narrow block.

How does the starter mount up to the FWD narrow block in the pics I've seen of 4gxx FWD narrow blocks they mount from the transmission side not the engine block side? Correct me if I'm wrong.

What rpms/tq/hp can the 4g63 achieve compared to the rpms/tq/hp of the 4g64? We are talking fully built engines here.

I also learned that you have to increase the rod length to 6mm more to achieve 0 deck height again when you destroke the 64 and that some of your options include : stock 64 rods with wiseco custom pistons, or 64 bore pistons with custom length rods. You could run the stock 64 on a 63 crank but wouldn't that 6mm difference cause that much more problems? Sounds like that 6mm difference would be robbing you of performance.

Is there an big aftermarket and performance difference between the 6 bolt versions and the 7 bolt versions? Did the 4g63 and g63b 6 bolt stay the same throughout production (minus SOHC/DOHC) like bore/stroke, crankshaft size, compression ratio? (ex given :: If I found a 4g63 out of a 1984 mitsu chariot could it still be treated like the 4g63 found in a 92 talon (minus the carburetion and MPFI difference.) Meaning I could still buy engine internals and externals as though they were the same engine?

What is the difference of the 4g63 and the 420a?

Forgive my ignorance I am learning.

[kage_maru189]

courtesy of wikipedia.org!

4g63b:

1983-1998 Mitsubishi Chariot
1984–1987 Dodge Colt Vista
1987-1992 Hyundai Stellar
1988 Mitsubishi Cordia
1988 Mitsubishi Tredia
1988–1992 Dodge Colt Vista
1989–1992 Mitsubishi Galant
1989–1992 US-spec Mitsubishi Galant
1990–1999 Mitsubishi Eclipse
1990–1998 Eagle Talon
1990–1994 Plymouth Laser
1982–1990 Mitsubishi Starion (Australia)
1992–1998 Hyundai Sonata
1986-1998 Hyundai Grandeur
1993-1998 Mitsubishi Montero
1994–1998 Mitsubishi RVR X3 Turbo
1994-1998 Mitsubishi Delica 2WD version (Japan)
1996-1999 Proton Perdana sei
1992-2006 Mitsubishi Lancer Evolution
2001-2006 Mitsubishi Airtrek Turbo
2001-2006 Mitsubishi Outlander Turbo
2004-present Brilliance BS6

4g64b:

1987–1990 Mitsubishi Sapporo
1988–1996 Mitsubishi Van
1990–1992 Mitsubishi L200
1990–1996 Mitsubishi Mighty Max
1986-1998 Hyundai Grandeur
1993-1997 Mitsubishi Expo
1994–2003 Mitsubishi Galant
1996–1998 Mitsubishi Magna
1994–2006 Mitsubishi Spacegear (2WD Version)
1996–1999 Mitsubishi Eclipse Spyder GS
2000–2005 Mitsubishi Eclipse RS & GS
2003 Mitsubishi Outlander
2005 Mitsubishi Zinger
1989–1991 Hyundai Sonata
1990–1992 Dodge Ram 50
2001–2005 Chrysler Sebring coupe/Dodge Stratus coupe
2004-present Brilliance BS6
2008-present Chery V5
2006-present Great Wall Hover
2006-present Great Wall Hover Pi

I hope this information can be passed along for others to use!

[Bill Hincher]

the reason the bellhousings were developed for the narrow block was because all your options you ask about are cheaper and easier to find in a narrow block configuration

destroking is an excellent choice for the tall block 4G64 using the 4G63 crank, the 2.0 crank will dramaticly lower the piston speed, longer rods are to your advantage because the piston will stay at TDC for a longer period of time during the power stroke and collect more working force

as far as cutting and welding transmission housings, its a lot of work and the trans is not heavy enough to carry the work load

but if you need to re invent the wheel, its ok, if you cant be hansome, you gotta be handy

[kage_maru189]

Ok then I'm gonna stick to my original idea of destroking the 2.4L. Where can I find a set of connecting rods to return the destroked motor to a 0 deck height?

If I return the destroked 2.4L back to it's 0 deck height with longer rods what would turn the compression ratio to?

EDIT::::

Just got back from the junkyard today. Found me a 2002 4g64 2.4L 7 bolt narrow block that the guy is letting me have for $100. It came out of a running car so it's good but the car had no title when it was repoed and then junked but I'm not too worried about that. I'm still looking into if it's originally a DOHC or not but if it isn't do I have to come up with a 7 bolt 6g63 or what oil drains do I block to mount a 6 bolt DOHC to this 7 bolt block?

If I'm going to destroke this 2.4L 7 bolt I have to use a 7 bolt 4g63 crankshaft right? The 6 bolt crankshaft is different by too much correct?

Anyone know what the stock rod lengths are on the 7 bolt 4g64?