View Poll Results: Which Balance Shaft Do you run or plan on running?

OEM Mitsubishi Stubby Shaft

42.86%

AMS Race Shaft

4.08%

GSC Race Shaft

16.33%

Magnus Stubby Shaft

Stock Balance Shaft

36.73%

Voters: 49. You may not vote on this poll

Evo Balance Shaft Thread

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Oct 23, 2017 | 01:11 AM

#31

Bladey

Evolving Member

Joined: May 2013

Posts: 130

Likes: 3

From: Auckland, New Zealand

Quote:

Originally Posted by BluEVOIX

Thanks to all for keeping this a good/healthy discussion.

I’ve seen that article by Jacks Transmissions and it is a good read.

Any one can confirm my below three questions ?

1. Do the Evo’s in Japan come with Balance Shafts ?

I own a JDM evo. All JDM evos 1-9 as far as i am aware run balance shafts and i've taken my fair few of them apart.

Oct 28, 2017 | 07:26 PM

#32

barneyb

Evolved Member

Joined: Jun 2006

Posts: 6,902

Likes: 151

From: Grand Island, NE

Here's how I got my stuck crank bolt out. Not my video but my results were identical.

Oct 29, 2017 | 09:49 AM

#33

BluEVOIX

Evolved Member

iTrader: (69)

Joined: Mar 2007

Posts: 2,115

Likes: 61

From: FL

Quote:

Originally Posted by Pinknuts

Stock Evo 9 block and crank, but upgraded long rods and buschur spec pistons. Car made well over 900hp and had upgraded motor mounts so there was a decent amount of vibrations. But that stuff is pretty normal for that power level. I was revving car to 9500 rpms. Hope that helps. It was still completely a street car and that’s the only place I drove it

Thanks for the input. Did you remove the BS at the same time your upgraded the rods/pistons ? I was looking to see a before and after with nothing else changed.

The stiffer motor mounts will transfer a lot more vibration. Did you notice in a certain RPM range additional added vibration other than just the motor mounts would transfer ?

Quote:

Originally Posted by Bladey

I own a JDM evo. All JDM evos 1-9 as far as i am aware run balance shafts and i've taken my fair few of them apart.

Thanks for sharing this.

Quote:

Originally Posted by barneyb

Here's how I got my stuck crank bolt out. Not my video but my results were identical.

https://www.youtube.com/watch?v=LtVZrqh4zXw

That seems like a real handy socket to own if it made a world of a difference like that.

Will you be deleting both Balance shafts now to compare since you got the bolt out?

Oct 29, 2017 | 12:10 PM

#34

barneyb

Evolved Member

Joined: Jun 2006

Posts: 6,902

Likes: 151

From: Grand Island, NE

Quote:

Originally Posted by BluEVOIX

Will you be deleting both Balance shafts now to compare since you got the bolt out?

LOL, no!

Oct 29, 2017 | 05:58 PM

#35

dempyel

Newbie

Joined: Apr 2014

Posts: 4

Likes: 0

From: Chile

BS delete for me in my former EVO IV and my new build. I reckon that Mitsubishi's engineers surely put the BS in for a reason, but as we rebuild the engine all the rotating assembly components will weight differently from the OEM ones, thus changing the frequency from the OEM rotating assembly.
My tuner/builder has every engine without BS and no issues in any race or street car.
The only time that an engine vibrated too much was with a 2.3L Manley Crank (Only crank changed due spun bearing and welded flywheel). It was incredible how much vibration that crank added.