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Balance Shaft Elimination Kit

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cturok7

15+ Year Contributor
121
0
Jun 14, 2005
Greer, South_Carolina
Hey DSMers. My name is Chris and I own a 1991 5spd. AWD Talon. I bought the car in Maryland last year and I live in South Carolina. As with any DSM I've had problems. I had the car for 3 days before I found out that the Balance Shaft (BS) was moving in and out. That and my lower timing cover is missing. I'm no mechanic although I want the knowledge. The BS is the issue here. The repairs to my car include an idle control of somekind, a new balance shaft and the lower timing cover, but the main issue here is the Balance Shaft. I've had my Talon off the road for a year now and I have been running it weekly because a sitting car turns into a dead car. Here's the issue:

I have done some research and have found that there exist BS elimination kits. My only concern with this is that if my BS is eliminated than my engine will vibrate. This is not good for the engine, I know, but I have seen it on two diff. websites that BS elimination is not all that uncommon. There are pros and cons of having this mod.
Pro. supposedly I will gain 8-12 hp from removal
Con. Engine vibrates. hazard.
(this is according to RoadRace Engineering)

Don't reply to this if you don't know what you're talking about. I am trying to make a decision about installing this BS or the Elimination kit.
 
Eliminate it. It's a point of failure. I haven't heard of anyone's engines/cars rattling themselves apart due to the BSE kit being installed.

If that BS belt breaks it will take out your timing belt and with your BS moving in and out it's probably wearing the belt and it's on it's way out the door.

There's no reason not to eliminate it, I would say probably at LEAST 90% of anyone owning a dsm that is in this community has their BS deleted.
 
all those "silent shafts" are there for is to make the motor quiet, and balance out the movement. Its the drivability of the motor that they were trying to achive with the car. When the BS are out you can feel the motor alot more, and it does not vibrate at all. You just feel the power. Take them out. You will also get more oil pressure, and read up on www.vfaq.com for more info. Good luck.
 
If youre really worried about the vibrations, tear out your internals and have them balanced.

Balance shafts? What are those? :p
 
Seriously balance shafts? Who needs those? :sneaky:

Like others stated, the vibrations are very miniscule. Only there for the non-racing world.
If you race its a piece of mind: less moving parts means less to brake. A spun BS bearing can be a pain in the tush. Plus the increase in oil pressure is nice.
The kit is $45 dollars, but involves removing the front case/ oil pump. So take that into consideration. Tho it shouldnt matter if your replacing it.
 
Thanks to all of you for your advice! I'm a newb who needs the help. I will def. call bubba.
 
so, Silver Eclipse, you think the best route to go is to ditch the BS? I'd rather do that because it will cost me less money. I've also heard that it will free up 8-12 hp.
 
Also, I know there is a short in my wires somewhere and it's draining my battery overnight. I thought it was an alternator, but when I bought the new battery, it sat in the car for like 2 days. I tried to start it and NOTHING. that means the battery is being drained very slowly overnight. can anyone give me help on how to FIND the shorted wire.
 
When doing the BSE, a BS bearing has to either be turned 180* or replaced with one that does not have a oil hole. If you dont do that, you can loose a lot of pressure.

As far as the parastie gos, do you have a aftermarket system? (if not then)
To find it you can take an amp meter (found built into most multimeters) with the car turned OFF, stick one test lead on the positive torminal of the batter and one on the terminal end. Carefully undo and disconnect the terminal end with out breaking the connections on either test lead. See what the amp meter reads (usually no more than 10 mA). If excessive pull a fuse one at a time until the amps drop. When they drop to or below good range, that is the circuit causing the excessive parasitic drain.
 
Now that I have been more educated on the benefit of BSE elimination I ask, "Where can I find them?"
And what's that whole 180 degree business?
 
The bearing that the balance shafts ride in have oil passage (little hole drilled in them in one spot) to lubricate the shafts.
Once there is no balance shaft to block that hole, oil will just squirt out. By turning the bearing it moves that hole away from the oil passages in the block. This keeps oil from coming out.
I cant remember exactly wich bearings have to be turned (if not all) because I bought my block with them already done. I will do some research to find them, unless some one else knows.
 
I went to a :dsm: dealer near my town's mall and the "dsm" guy told me that the labor on the BSE elimination was a task. That's what I'm hearing every where (online). I'm no experienced mechanic so I don't plan on doing it. If this was a cheaper car that I didn't want to neccessarily keep in pristine order than I would do it myself, but DSM are respectable machines and I don't want to ruin mine due to inexperience. They have a mechanic there who recently performed the job on his EVO. He did a RWD conversion. Anyways, that's beside the point. I'm guessing I should go that route. The Mitsu parts are around $50.

Would most experienced mechanics know how to do this?
Because I know a guy who does my other car's labor for cheap and he's pretty experienced.
 
You can go to vfaq.com and lookup the walkthrough. It comes complete with pictures. The front shaft is fed oil via the block and requires the press in of block-off bearings (solid, no oil passage) or to rotate the oem bearings 180*. The rear shaft is actually fed via the shaft itself. It'd make alot of sense to do the timing parts as well since everything will be apart.
 
Well guys! I'm also concerned about the how the balance shaft is "moving." I'm concerned that my vehicle might develop crankwalk. Who's got some advice?:talon:
 
do you guys know which bearing is for what balance shaft? They have the same circumference I do believe, but not the same depth. One has more depth than the other.:talon:
 
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