Evo VIII motor swap

[XtremelySLOW]

Hello all, new to the forum here I got eferred from 4g63hp.com. I am starting a build on a 4g63. I have just started procuring parts and am in need of a little guidance.

I would like to start with a 7-bolt out of an evo VIII, however the engine is proving hard to find in Arizona. The local salvage yards have many of the non-evo 2.0L blocks and I would like to know more about this block. Is it the same casting as the turbo 7-bolt 4g63? I will be purchasing the head seperately from the mitsu dealer, so these questions are block specific only.

from what I have read n this site, it suggests that the only differences in the blocks are the provisions for cylinder oiling. It also say theat the block can be midified to use these. Is his the only difference? Are the blocks the same, or is the non-evo a lesser possibly weaker block? Any help would be greatly apprecited.

Also, I will be stroking the motor using the crank form the 4g64. I asked the dealer about it and got the part number for the crank out of an 06 eclipse. Is this the correct crankshaft? I chose 06 because the evo VIII as 05-06 correct?

Thanks

[XtremelySLOW]

I think I may have been a bit confused. Let me try to redeem myself here. It seems the 4g94 (non-evo) is an entirely different motor all togather... right?

The question then would be is there a non-turbo 7-bolt 4g63 that maybe came in a different car(non lancer?) If so, can I use the DOHC head from the evo atop it and modify the block/oil passages to resemble that of the evo VIII block? Will the block be any different in any other way?

Thanks.

[jeffball610]

You might want to contact a race shop that deals a lot with the EVO motor. As far as I know, the 4G64 found in the 4 cylinder 2000+ Eclipse and others, has the same block. I'm pretty positive the crank will fit in an EVO block. Mitsu was smart and saved money by making their motors with interchangeable parts.

Some advice would be to make friends with a local EVO shop or Mitsu dealership parts guy. If you can get some pictures of the 2.4L and EVO 2.0L headgaskets, that would go a long way. I know the non EVO motors won't have oil squirters for the pistons and you'll need to build the lower end in them any way. I'll see what I can dig up, just cause I'm curious.

*Edit
Everything here points to yes answers across the board. I guess Mitsu decided to keep things the same even though it all changed. Stage 2 2.4L short blocks go for $2700. Not bad considering what you planned to do anyway. And the photos show that the EVO blocks have the same motor mount locations to use RWD motor mounts.

http://www.slowboyracing.com/estore/home.php?cat=5340

[XtremelySLOW]

The 4g64 I believe has a taller deck height i.e., longer stroke, and i was hoping to use the 4g63 block with the 64 crank to get the stroker motor. Using the 64 block I don't think I would be able o get the compression level I want because I will be running verry low boost.

I have been hanging out at mark mitsubishi, and superstition springs mitsubishi. Also, I have only been able to find one local reputable evo shop, but was not too thrilled with what I heard. I will keep looking around for another shop.

[quest4power]

the evo shares a block with the 4g galant. mounts are different in those from the eclipse/talon 4g. i.e. no provisions in the block for the front lateral mount(evo/galant is on the tranny). and the evo's fixed the crankwalk issue common with the 7 bolts. other than that...i don't think they are too much different that a regular 2g...unless you get the mivec motor

[XtremelySLOW]

Thank you. That helps. After reading this, I did some more reading about that crankwalk issue. So they fixed this in the evo-7-bolts? What was the issue and how did they fix it. The donor block out of the galant sounds like a more feasable idea, however, not if It has issues with crankwalk. Can this be remedied? Also is the galant a 4g63, or 4g64? ie, 2.0,2.4.

Sorry if I don't post often, I try to read more than post, as not to whore. Thanks for the help.

[quest4power]

not sure how they solved it...but they did. i've never really read up on the 7 bolts too in depth...never reallly saw the need with the availability of 6 bolts, so i'm not sure if the crankwalk is "solvable". i know the earlier 2g galants ('94) were 2.0 (4g63) not sure when they made the switch to 4g64 (or for that matter, if they even did)