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Author Topic:   harmonic balancers??????
Dirt Freak

Total posts: 273
posted January 14, 2002 03:52 PM
What kind of balancers does everyone use?Just looking for input here goood,bad and indifferent.Thanks

Dirt Freak

Total posts: 467
posted January 14, 2002 06:15 PM
ATI !! You wont find a better one !!

Hendren Racing Engines
Rutherfordton , NC

Dirt Roller

Total posts: 20
posted January 27, 2002 01:57 PM
Sup, I bought a Cat solid damper. I works great and has no ring to shift. I used stock last year, big mistake... I lost my first one in the middle of a race. and the second had moved on me by the end of the season. I bought mine new on ebay for about $60. Hope this helps. Rino

Dirt Roller

Total posts: 13
posted January 27, 2002 07:37 PM
Genuine GM, about 50 bucks

Dirt Freak

Total posts: 349
posted February 02, 2002 12:12 AM
If you have to run a stock one, and you run a GM with a 350, use a 305 balancer. they work and they are smaller than the 350 balancers. Remember smaller is less rotating mass and the engine winds up quicker. this is good coming off the corner.
Note: 305 and 350 cranks are the same. 305 may be a bit weaker but I have never had one break.

Dirt Forum Racer

Total posts: 79
posted February 03, 2002 08:27 AM
Great question and great answer, UFO. Your answer makes the most sense to me. Are there any pros/cons to UFO's answer. I'm sorry that I didn't find this forum sooner. Thanks to all.

Dirt Roller

Total posts: 10
posted February 03, 2002 12:19 PM
I use just a plain old stock balancer and only lost one but that was because the end of the crank broke

Dirt Forum Racer

Total posts: 79
posted February 04, 2002 08:07 AM
I've done a little bit of research and found a source in HP Books "How to Hot Rod Your Big Block Chevy". In their opinion, unless you are continually in extremely high RPM, such as Tallegega, Indy, etc., the aftermarket, expensive balancer is not worth the expense. UFO's 302 balancer idea is sounding more appealing. Does anyone know what this smaller balancer may do to other engine components, harmful or no?

Dirt Full Roller

Total posts: 27
posted February 04, 2002 08:29 AM
I too have heard that harmonic balancers are not important in short track racing. When RPM's are constantly changing, harmonics cannot develop. Only at sustained higher rpms can this become a problem.

Dirt Full Roller

Total posts: 69
posted February 04, 2002 02:26 PM
I read somewhere that the 8 inch balancer is the best because the smaller balancers allow to much vibration it effects cam timing anyone ever hear of this?

[This message has been edited by powerglides (edited February 04, 2002).]

Dirt Forum Racer

Total posts: 98
posted February 04, 2002 10:11 PM
a know a guy that uses a 283 balancer on his 350, it is a very small, thin , lightweight balancer and has never blown a motor with it on his engines, he also drills and taps a hole to connect the inner and outer pieces together so the outer piece cant move..

Dirt Forum Racer

Total posts: 79
posted February 05, 2002 04:01 AM
I don't like the idea of drilling or tapping anything that was made for weight balance. If you drill out small amount too much on one hole, or whatever your using for fasteners is not exactly the same weight, or you drill your hole just a small bit off of perfect, you are going to put vibrations that are unecessary into the whole works. Think about it. hold a five pound weight in one hand and spin around. What is going to happen the faster that you spin... Major wobble. Think about what this would do to your bearings upon which this wobble is placed. If you gatta have a trick balancer... I say leave the tricks to the machine shop of the manufacturers.

Dirt Freak

Total posts: 353
posted February 06, 2002 02:13 AM
Get a BHJ balancer($99). They're designed with a retention ring, are lightweight, are small(6 1/4), and have timing marks engraved in them like the high dollar fluid-type balancers. Well worth the extra money. Have run both the external and internal versions with nary a problem.

Dirt Forum Racer

Total posts: 79
posted February 06, 2002 04:56 AM
I've got to ask this again... If I'm running a 350ci and use a 302ci balancer, will this do anything to harm other components of the motor? I like the idea of the motor winding up quicker, this will allow faster accelleration off the turns as UFO has stated. Does anyone know the answer? I'm not going to experiment until I am fairly sure. I'm racing on a budget as with most of us in this class. I don't see the need to gain a little more accelleration if I'm going to regrind the crank and replace bearings every few races.

Dirt Maniac

Total posts: 174
posted February 06, 2002 07:40 AM
I'll tell you what we have settled with, successfully. I run a big 8" factory balancer because it's going to do a great job of absorbing or displacing harmonics, and I don't buy the idea of a super lite rotating assembly when my car weighs over 3000" and I don't lose much speed or RPM through the corners. I'm sure you all have heard of guys running heavy flywheels that keep the engine spinning with inertia and they just ease back into the throttle after the center of the turn as soon as the rear tires allow. Let me tell you that if you figure out the driving style, which isn't hard, it's very fast. As long as my motor stays healthy and I'm winning races, I'll spend my money in more productive places. This is my opinion from my experience.

A street stock isn't a modified or a sprint car.

Dirt Forum Racer

Total posts: 98
posted February 06, 2002 07:19 PM
The 305 balancer will work on the 350 but they are bad about walking backwards and will rub a hole in you front cover.

Dirt Freak

Total posts: 298
posted February 06, 2002 07:47 PM
We always ran a 6 7/8 Corvette balancer (late 60's early 70's) from Chev. never had a problem. Small and for a balancer, light. About $70.

Dirt Full Roller

Total posts: 55
posted February 08, 2002 07:44 AM
i am building a 406 right now and plan on using a 283 balancer on the front. i think it works better for motor to have less weight that its having to spin around. of course with the 400 motor i can internally balance the crank to allow the 283. ive ran stock balancers on my 355 and 383 without any problems. i just watch them to make sure their in good shape and not starting to crack at the rubber.

Dirt Forum Racer

Total posts: 98
posted February 08, 2002 06:59 PM
so is a 283 balancer on a 350 a good idea or what?

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