evo 3 questions

[Jhusey]

Hi, i wanna know how to difference a REAL " 4G63 EVO 3 motor "

- Is this motor have problem with crankwalk like few 2g eclipses??

- Is this 6 o 7 bolt??

Thanks

 

[fwdmaster]

Evo 3 motors are not prone to crankwalk even though there 7 bolt engines

 

[Dsmj89]

Evo3 motors have 510cc injectors, different intake manifold, and are 7 bolts.
There hasn't been any reports of a evo3 motor with crankwalk.

 

[Golden-Boy]

Can I put a Evo 3 engine and tranny in a 98 GSX? they are fairly cheap
(about $1,500 with tranny)

 

[timm98gst]

engine, yes - i have one in mine - transmission, don't know - i used my stock tranny

 

[Jhusey]

thanks for the replies.

How do i recognize physically a JDM evo 3 motor?? Here i can tell people to import one but they can give a JDM evo 2 motor, if im not wrong it is 6 bolt. So looking by outside i can difference a evo 3 motor looking if it is 7 bolt right??

thanks

 

[99redgst]

There hasn't been any reports of a evo3 motor with crankwalk.

Evo 3 motors are not prone to crankwalk even though there 7 bolt engines

Seems to be a different story over here: Evo321.com • Index page
Seems to be as common in an evo III as a 2ga. They both use the standard thrust bearings, not the revised split bearing. The Evo guys do 6 bolt swaps as well or try to source the later blocks with the split thrust.

As far as the differences go, I'll list all that I am aware of:
Engine:
9.0/1 compression
Oil filter housing in an air cooled unit
Cams are slightly larger
Thermostat housing does not have radiator cap(its on the radiator)
510cc injectors
Intake manifold
Exhaust manifold
16g
o2 housing

Trans:
Taller first
Close ratio 3/4
Taller 5th
Front LSD
Final drive is different(evo around 4.5, dsm around 3.9)
To use the trans you will either have to change the final drive in the trans or source an evo III rear diff as well.

Here is some good info on how to identify a true evo motor: http://www.dsmtuners.com/forums/151285664-post64.html

Hope this helps.

 

[99redgst]

Also, all Evos where 7 bolts. I believe I and II used the 1g head design, so they would be similar to the 1gb engines.

 

[the_mork]

Also many "evo engines" are either from Galants or RVRs. There really isn't a significant difference and I certainly wouldn't pay much just for having an evo3 motor. Did your motor go bad?

 

[Jhusey]

nothing wrong, but i wanna be 370whp safe without crankwalk. I have some Seat Leon, Audi A3 and Golf MK4 to kill.

In Peru is more easy to import an evo motor than get a 4g63 from an eclipse

 

[SpawnedX]

Any motor can get crankwalk, any, does not have to be a DSM either. Many cars develop crankshaft play and slide a little on their bearings.

Catastrophic failure is more prevalent in DSMs for several reasons:

Use of ridiculous pressure plates like an ACT 2600 on their car no matter the mods or power. Combined with -

Stock bearings.

People not matching their aftermarket bearings with their crank properly.

Constant hard launches.

I have seen 1Gs walk, 2Gs walk, "Evo III" motors walk, a couple of Evo VIII's and an EVO IX walk.

So please do not spread bad information about how 1 particular motor is safe from the walk. None are, nor will they ever be. If you are worried about, DSMs may not be the right platform for you.

 

[the_mork]

nothing wrong, but i wanna be 370whp safe without crankwalk. I have some Seat Leon, Audi A3 and Golf MK4 to kill.

In Peru is more easy to import an evo motor than get a 4g63 from an eclipse

Build it until it breaks, a stock 7-bolt should be able to handle that sort of horsepower if it is well maintained.

 

[AndyF_Evo3]

Yes,
Evo3's suffer from crankwalk.

The later Evo's (Evo5 onwards) are less prone to it due to the revised centre thrust bearing design.

When I had my engine rebuilt around 18months ago, I had extra oilways drilled into the centre thrust bearing to help improve the oil flow.

I also run at 1,250rpm at idle to help improve the oil flow at idle and never ride the clutch at junctions, always start the car with the clutch depressed etc.

Andy

 

[EVO_THREE]

Don't bother going an evo III motor for 370whp. They have weak pistons & smaller rods.

Have a look at my thread for engine bay details..

http://www.dsmtuners.com/forums/project-build-logs/322311-mitsi-evo-iii-oz-11-575-115mph.html

If you want detailed pix of anything I have the head, manifolds and turbo off (again) due to a valve hitting my CP piston (my fault).

I still have the stock rods / pistons too if you want pix to compare.


Evo III is different from Galant & VR4
Cams are 252's
Crank & Rods are the same accross the board EVO 1-9
Lifters have bigger internal holes - for increased oil flow

Manifolds and small intake ports are 'High Velocity' in design to promote quick spool and increased air speed..

 

[trinityblood]

evo1-9 has 7 bolt crank,
like 99 say,evo 3 has 9.0 compression,newer version of td05 16g turbo,
higher final drive and has anti lag pipe return back to the intake manifold.

 

[ryanx99GS]

Find a 4g63 bottom end out of a 1999 talon or eclipse. It will have the revised thrust bearing. Same bottom end as the EVO VIII and IX.

 

[99redgst]

Since there are some Evo III owners in here, I have a few questions that I am hoping one of them can answer.
1. What kind of center diff do they use? Same 2 spider the DSMs came with? I heard someplace that it is a rear biased diff but I don't think that is correct.
2. Front diff is LSD correct? If so what type?
3. Any good sites with info/specs on the Evo III. I have been having a hard time finding much on them, evo321.com has been the most informative site I have found.

The reason why I am asking these questions is because I have been considering picking up an evo III engine/trans myself. Why buy a used JDM motor? The main reason is for the trans itself, I plan on going to the evo III gearing and a rebuild with that would cost as much the entire engine/trans. I would also acquire the hard to find oil filter housing(air cooled 7 bolt housing) Then there is the parts you could sell off it. Exh mani, turbo, o2, intake mani. Between those items alone you should recoup 600. If it does indeed have a front LSD I can sell that since I have a Quaife that would go in instead. So that would get close to 1k back from a 1700 purchase. I think 700 is worth the gearset alone. Plus you have a complete engine with 9.0/1 compression. I could care less how long it lasted. Throw some ARPs in it and give her hell, if it pops no big loss. Seems like a good plan to me, or is there something I'm missing?

 

[AndyF_Evo3]

I can hopefully answer them for you...

1. The Evo 3's use a viscous centre diff. As for if they are the same as the DSM then I am not able to say as I'm not up to speed with DSM's. And they are not rear biased, the torque spilt is fixed at a 50/50 front/rear ratio.

2. They came both with and without front LSD's. It will depend upon the gearbox code, They all start W5M33-2 but then the final 4 letters determine what box/LSD setup.

UPFE is a RS box with LSD
UPYE is a RS box with no LSD
UPGE is a GSR box with no LSD
UPWE is a GSR box with LSD

3. Evo321 is probably the best early evo site but there is also quite a lot of info to search through on the Mitsubishi Lancer Register (Mitsubishi Lancer Register)

Andy

 

[99redgst]

DSMs use a two spider center diff with viscous coupler. The center diff is commonly upgraded to a four spider as the stock one can be a weak link. I am just wondering if the evo came with a more robust unit?

Did the RS and GSR have a different final drive? The LSDs are a mechanical type like the rear diffs?

Thanks for the help.

 

[EVO_THREE]

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