Harmonic balancer weight and its effects ???

Stan Weiss · 07-31-2020, 10:00 PM

Exactly. Plus it also depended on how fast the rate of acceleration of the engine is. A 1 lb weight on the outside of a 6" diameter accelerating at 2000 RPM per second at 7000 RPM is taking less than 0.54 HP. Where as that 1 lb on the outside of a 12" diameter accelerating at 2000 RPM per second at 7000 RPM is taking 2.17 HP.

Stan

Cotten · 07-31-2020, 10:34 PM

I put it in the category of things that dont show a measurable increase but when added to 50 other things like that, all of a sudden your a little faster. Lol

Bernhard · 08-01-2020, 11:06 AM

Thanks you for your insightful replies to my question.
Bernhard

Dinsdale · 08-01-2020, 11:32 PM

I'll add a couple things with no verifiable info to suggest I'm correct however.. Almost all balancers are neutral or zero balanced so a change won't affect anything internal. Smaller/lighter should spin up faster but as mentioned, you'll never notice it. What is important is the name "Harmonic". A small lightweight balancer can't control internal harmonics like a heavy "factory" one does. Bearing or crank failure can be the result. Some engines and balancer brands are notorious for this.

Hopefully, a real expert chimes in here but i can guarantee you'll se nothing performance wise. Kinda similar to Roller Rockers that are magically going to add HP> JMO

GTX JOHN · 08-02-2020, 02:34 AM

Quote:

Originally Posted by Cotten

I put it in the category of things that dont show a measurable increase but when added to 50 other things like that, all of a sudden your a little faster. Lol

I put in category of things that don't show a measurable increase but when
added to 50 other things like that, all of a sudden you're a whole lot poorer. Lol

AND THEN = Your crank is in two pieces!

L.Fite · 08-02-2020, 10:37 AM

Quote:

Originally Posted by GTX JOHN

I put in category of things the don't show a measurable increase but when
added to 50 other thing like that, all of a sudden your a lot poorer. Lol

AND THEN = Your crank is in two pieces!

Remember back in the days before ATI balancers when we cut the ring off the hub so the balancers wouldn't explode and kill the starting line crew?...
Ended up with stock in Federal Mogul and had lots of two piece door stops!

Fireofficer5 · 08-02-2020, 01:10 PM

Quote:

Originally Posted by GTX JOHN

I put in category of things the don't show a measurable increase but when
added to 50 other thing like that, all of a sudden your a lot poorer. Lol

AND THEN = Your crank is in two pieces!

Laughed so f#$%in hard.

GTX JOHN · 08-08-2020, 05:53 PM

I read it again......I laughed for a minute!

It is not easy to even smile the last few months

we have suffered through.

SSDiv6 · 08-09-2020, 07:52 PM

There are lots of data, including SAE Papers that show that in addition to dampening harmonics, the proper harmonic dampener will help the engine produce more horsepower.

http://www.atiracing.com/products/dampers/sae.htm

http://www.atiracing.com/products/dampers/sae.htm

There is a great SAE Paper regarding harmonic balancers and its effects in horsepower.

https://www.sae.org/publications/tec...ontent/790763/

07-31-2020, 10:00 PM	#1
Stan Weiss Senior Member Join Date: Apr 2020 Location: Phila, PA Posts: 794 Likes: 0 Liked 734 Times in 385 Posts	Re: Harmonic balancer weight and its effects ??? Exactly. Plus it also depended on how fast the rate of acceleration of the engine is. A 1 lb weight on the outside of a 6" diameter accelerating at 2000 RPM per second at 7000 RPM is taking less than 0.54 HP. Where as that 1 lb on the outside of a 12" diameter accelerating at 2000 RPM per second at 7000 RPM is taking 2.17 HP. Stan

07-31-2020, 10:34 PM	#2
Cotten Member Join Date: Aug 2007 Posts: 235 Likes: 486 Liked 564 Times in 70 Posts	Re: Harmonic balancer weight and its effects ??? I put it in the category of things that dont show a measurable increase but when added to 50 other things like that, all of a sudden your a little faster. Lol Last edited by Cotten; 08-01-2020 at 08:54 AM.

08-01-2020, 11:06 AM	#3
Bernhard Junior Member Join Date: Jan 2012 Posts: 30 Likes: 0 Liked 1 Time in 1 Post	Re: Harmonic balancer weight and its effects ??? Thanks you for your insightful replies to my question. Bernhard

08-01-2020, 11:32 PM	#4
Dinsdale Member Join Date: Oct 2004 Location: Canada Posts: 313 Likes: 0 Liked 6 Times in 2 Posts	Re: Harmonic balancer weight and its effects ??? I'll add a couple things with no verifiable info to suggest I'm correct however.. Almost all balancers are neutral or zero balanced so a change won't affect anything internal. Smaller/lighter should spin up faster but as mentioned, you'll never notice it. What is important is the name "Harmonic". A small lightweight balancer can't control internal harmonics like a heavy "factory" one does. Bearing or crank failure can be the result. Some engines and balancer brands are notorious for this. Hopefully, a real expert chimes in here but i can guarantee you'll se nothing performance wise. Kinda similar to Roller Rockers that are magically going to add HP> JMO __________________ Dale Posnick

08-08-2020, 05:53 PM	#8
GTX JOHN VIP Member Join Date: Jun 2009 Location: Boulder City, Nevada 89005 Posts: 2,733 Likes: 2,799 Liked 2,485 Times in 697 Posts	Re: Harmonic balancer weight and its effects ??? I read it again......I laughed for a minute! It is not easy to even smile the last few months we have suffered through. __________________ John Irving 741 Stock 741 Super Stock

08-09-2020, 07:52 PM	#9
SSDiv6 VIP Member Join Date: Feb 2003 Location: Glendale, Arizona Posts: 3,044 Likes: 712 Liked 1,583 Times in 582 Posts	Re: Harmonic balancer weight and its effects ??? There are lots of data, including SAE Papers that show that in addition to dampening harmonics, the proper harmonic dampener will help the engine produce more horsepower. http://www.atiracing.com/products/dampers/sae.htm http://www.atiracing.com/products/dampers/sae.htm There is a great SAE Paper regarding harmonic balancers and its effects in horsepower. https://www.sae.org/publications/tec...ontent/790763/