2g 2.4L 4g64 7-bolt Bottom End Swap.

[DSM mechanix]

Originally posted by genxxxracer
Since the 1g rods fit the 4g63 does this mean that they will work in a 4g64 coversion.

Depend weather its a 6 or 7-bolt, I dont think they will fit the 7-bolt.

 

[genxxxracer]

I just found a crankshaft kit that contains Crankshaft, Main Bearings, Rod Bearings & Thrush Washers for the g64b for 226.00. So along with my bare block I just need to find some rods and pistons. Does this sound right? Am I missing anything? If so it looks like I can have a 2.4L 6 bolt for under 1k.

 

[treimche]

Where did you find that crank and bearings kit from??

 

[genxxxracer]

I found it at www.importperformance.net

The 6 bolt 2.4L will fit just the same as the 2.0L 6bolt right? If there is anything I am missing would someone please let me know.

 

[skier_du]

According to the numbers on this page from Wiseco, if you where to take a 4G63 and bore it 60 over and put in a 4G64 crank, you would essentially have a 2.4L, or 80 for a true 2.4L
http://www.wiseco.com/PDFcatalogs/2003_sport_mit.pdf

 

[Tevenor]

You don't want to bore a 4G63 block 60 or 80 over.

 

[skier_du]

I realize that it would compromise the integrity of the cylinder walls. However, Wiseco still sells them.

 

[Big Red 211]

Has anyone found stock 2g or maybe Evo pistons that are .060" overbore? Not forged aftermarket ones but the stock pistons overbored.

 

[RipperXX]

I know this is not my area here, (BTW sounds like at this rate you guys going for the stroked engines are going to hand us 2.0 guys our ass's)

But on the 80 over boar I just thought of something. Couldn't you boar it even larger and sleave the cyl? Or would that still be to weak?

 

[sophat34]

I checked in to the sleaving thing when I had my block machiend, $$$$$. I built a 7 bolt this time, I'll see how it goes. if this one blows up I might do a 6 bolt with sleves, have a better job now. as far as the rev limit 8.5k seems to be what I have heard even from marco. thats with the standerd rods. if u do it with the long rods and diffrent pistons I have heard 9.5 -10k but who honestly runs any thing close to those rpms on the street? for most people turbos turn in to hairdriers at those rpms.

 

[Big Woo]

I see no gain in putting sleeves in a 6-bolt block so that you bore it +.060 or .080. Here is why, standard bore for a 4G63 3.346 + say a .060 overbore = 3.406. Sleeves are typicaly either 1/8" or 3/32" wall pieces, so you have to bore the block either + .125 or .0937 roughly since sleeves are a press fit into the block. Then the sleeve is bored for the new bore size in this case 3.406 so you have not gained any cylinder thickness. So I don't see the point unless you are trying to increase the deck height to equal the 4G64 block, but even then why stop there, you might as well make it even taller and get some longer rods to stuff in it as well.

This past summer I ran a 2.3L with JE pistons, Oliver rods, with a T4 turbo with NOS and turned it 9k all year long, and it still pulls like a raped ape, after 78 1/4 mile pases, and a few k of street miles.

Maybe if you want a bigger motor you should be thinking about using a GM 2.5L block or anyone elses for that matter and modifing the deck to accept the 4G63 head, at least then you cloud put a real transmission behind it. Or you could turn the 4G63 block into a wet sleeve motor and use the darton sleeves. Just though I would add a few more possibilites.

 

[talonted_one]

Originally posted by skier_du
According to the numbers on this page from Wiseco, if you where to take a 4G63 and bore it 60 over and put in a 4G64 crank, you would essentially have a 2.4L, or 80 for a true 2.4L
http://www.wiseco.com/PDFcatalogs/2003_sport_mit.pdf

I actually have those pistons that you are talking about.

My question howver goes to those who have their 4g64s running.... What compression ratio do you have. I have a 9.3:1 piston set and the concern was brought up of it being to high.

 

[gixrman]

There is a product that is a block "fill" that comes in a liqiud form that is pored into the cooling holes of the block to add strengh once it hardens. I remember seeing done to small block chevys where they filled up the top half of the water passages, but it was strictly race. How much of a side wall would you have left boring .60 over?

 

[Big Red 211]

Has anyone found a set of stock 2g or Evo pistons with a .060 overbore?

How much of a side wall would you have left boring .60 over?

Not much. It's better to go .040 over max.

 

[NeEmO6]

What all machining has to be done to the 4g64 block to get it going?

 

[talonted_one]

What all machining has to be done to the 4g64 block to get it going?

read the very first post in the thread.

 

[nc_99_99]

Thought since I am running the setup many of you are speaking of I would chime in.

I am running a 94 7 bolt 4g64 DOHC block. I had 1g rods machined to work on my 7 bolt crank just the same as a 2.0l.

As for the overbore, mitsubishi stocks .040 overbore pistons for the 4g64. Do the math, that would make a .100 overbore 4g63. I wouldn't exactly recomend this for a high HP application.

If you guys are looking for forged pistons. I got some 8.5:1 Weisco pistons from the guys at www.barnonemotorsports.com. They are a good group and know a whole heck of a lot about 2.4l motors.

Good luck all

 

[HybridAWD]

Originally posted by nc_99_99
As for the overbore, mitsubishi stocks .040 overbore pistons for the 4g64. Do the math, that would make a .100 overbore 4g63. I wouldn't exactly recomend this for a high HP application.

i hope you are refering to just the stock pistons..... as far as not using them for .040 over.

 

[Big Red 211]

So does anyone know if you can get stock 4g63T pistons in a .060 overbore? That would reduce the cost of building a 4g64 and they will work fine.

 

[HybridAWD]

Originally posted by Big Red 211
So does anyone know if you can get stock 4g63T pistons in a .060 overbore? That would reduce the cost of building a 4g64 and they will work fine.

my dealership i believe only offers pistons .040 over. Weisco now sells pistons for the 4g64 DOHC setup, and they are like $400 i think.

 

[Big Red 211]

That's the same as my dealer. I like the $38 a piston a lot better than $400 a set.

 

[talonted_one]

If you are going to buy a stock piston with a .060 over bore you will have to remember that the piston will not be forged.

IMO if you are going to do this you might as well go all the way, unless you like rebuilding motors.

 

[Groomz]

Do you use the 7 bolt flywheel from a 2G without modification for the 7 bolt 4G64 crank?

Also, correct me if I'm wrong, but for a 7 bolt 4G64, you would need to order 7 bolt 4G63 rods?

Would a 6 bolt 4G63 oil pan fit on a 7 bolt 4G64 block?

 

[Big Red 211]

If you are going to buy a stock piston with a .060 over bore you will have to remember that the piston will not be forged.

I know they aren't forged, that's why I want them, they are 1/3 the price. Do you know anyone that sells them?

 

[HybridAWD]

Originally posted by Groomz
Do you use the 7 bolt flywheel from a 2G without modification for the 7 bolt 4G64 crank?

Also, correct me if I'm wrong, but for a 7 bolt 4G64, you would need to order 7 bolt 4G63 rods?

Would a 6 bolt 4G63 oil pan fit on a 7 bolt 4G64 block?

Yes you use the 7 bolt flywheel from a 2g turbo w.o modifications!

As far as the rods go, yes it would be easier to use 2g rods (itd be like putting 95 pistons on a 1g rod)

I dont think the oil pans will work the same, but i dont know that for sure, but my 2g oil pain fit perfectly with the 7-bolt block