I noticed that majority of the engine built comes with 2.3 vs 2.4? Does 2.4 built have reliability issues? I am inclined to built a 2.4? More displacement=more torque and power potential? Any input from professional engine builder?

Thanks

 

^very intersted to know this as well.

 

+1 iam interested too know, also, i know a basic ams stroker kit is like 2k, how much does it cost to get the motor built with the stroker kit, money for r&i of the motor, and stuff

 

intresting. are the AMS and Buschur cranks forged or just 4G64 cranks???? only ask cos i know of a couple of UK companies that are having their cranks forged now. think crower are doing them.

Chris.

 

i believe people go with a 2.3 for the following reason's in order:

1. they already have a block, no need to locate 2.4 block
2. the block has oil squirters, 2.4 you need to machine for squirters if wanted
3. no need for special water pump plate
4. no searching for different timing belt
5. people know the history of their motor...usually a good thing.
6. the main bearing girdle is beefier in the evo block vs. 4g64

 

Just so things are clear for people who are new to the 4G63 and 4G64 platforms, here is a quick guide to the different type of setups. In the Evo, you can use two different type of blocks, which bolt directly in, the 4G63 (which it comes with from the factory) or the 4G64.

4G63 block can use:
-factory crankshaft (allows 2.0 Liters of displacement)
-4g64 crankshaft (allows for 2.3 liters of displacement, this is the most popular "stroker kit" everyone speaks of)

4G64 block can use:
-factory crankshaft (allows for 2.4 liters of displacement)
-4G63 crankshaft (allows for 2.1 liters of displacement, this is known as the "destroker" setup)

Keep in mind that nowadays, you can get a forged crankshaft 4g63 or 4g64 crankshaft, which is definitely recommended if you plan on running big power.

Yeah I agree, the 4G64 block is a hassle to find, and it is a hassle to find parts for. There are many small difference between the 4G64 and 4G63. There are certain things you may need, and should take note of:

-need Water pump plate
-need 4G64 timing belt
-need 4g64 cam gears
-Oil squirters installed (optional)
-The dipstick is located in the front of the block (may interfere with manifold location)
-Generally speaking, the 4G64 is weaker than the 4G63 (the bores are larger and there is less metal in between cylinders, which implies the overall rigidity of the block is lower than the 4G63).

I plan on running one in the near future (I see them for sale at my local junkyard for $100 a pop) but its going to cost probably 3-4 thousand for parts. There are two different modes of function for 4G64 setup:

2.4 Liters (uses regular 4G64 crank)
Using this setup you will be able achieve the best power/torque curve possible for the Evolution 7 8 or 9. This type of setup has an obvious displacement advantage allowing for faster turbo spoolup (great if your running a large turbo) however the rod length to stroke ratio is still worse then in a regular 4G63, which limits some of the high RPM capability.

2.1 Liters (destroked using 4G63 crank)
This setup is very interesting. Using this combination allows for an optimum rod length to stroke ratio, which creates much less side loading on the cylinder walls. People who use this setup typically have one thing in mind, mind blowing RPM capability. This setup is very favorable for road racing or Autocross, where high rpm's are necessary for the best lap times.

 

The dipstick is still located in the back. I dont know where you got the info about it being on the front of the block. Only thing is, is you need to modify where it bolts to the intake manifold. The block sits 6mm highers so it doesnt line up perfectly.

--Josh

 

so many things wrong ....

You do not need 4g64 cam gears... most 4g64's were sohc...
Dip stick is in the back just like the 4g63
4g64 piston can be purchased "off the shelf" from Wiseco and from many other vendors
Same rods as 4g63 can be used
You can use a 4g63 timing belt as long as you have adjustable cam gears to correctly set the TDC
4g64 blocks can be found VERY easily. I got mine for like $200 at a junk yard

 

I agree Joe 2.3 4g63 is just easier but not necessarily better.

 

There are some 4G64's with the dipstick in the front, I've seen this many times in Hyundai cars (sonata). There are indeed DOHC 4G64's. I never mentioned anything about what rods or pistons are to be used. Not all 4G64's are the same! I think it is interesting that you say the dipstick is in the back, because all of the ones I've seen are in the front?

 

Well your wrong yourself bud. You cant use a 4g63 belt. The block is taller therefore moving the head up higher. The 63 belt isnt long enough. You have to use the belt from a dohc 4g64 motor. Everything else is right though.

--Josh

 

well, im an eclipse owner about to put the evo 8 head on, and from what i know you need the 4g63 timing belt

 

I couldnt get my 63 belt to fit. It wasnt long enough. I had to buy a 4g64 DOHC timing belt

 

Did you use 63 gears or 64?

 

I used 63 adjustable gears

--Josh