Harmonic Balancer

shurb125 · November 26th, 2007, 09:40 PM

What exactly determines the choice and weight? Just looking to purchase one for a 306 engine build.

shurb125 · November 29th, 2007, 08:17 AM

Do I just need to purchase a factory replacement with the same weight?

1slo5.0 · November 29th, 2007, 11:18 AM

What is wrong with your stock balancer? If it is bad and you need a replacement you will need to match the imbalance. 83-95 5 liter H.0. engines are 50 oz. Earlier 5 liters (302) are 28 oz.

shurb125 · November 29th, 2007, 05:35 PM

I don't know it it was a H.O. engine, I just know that the block came is a roller cam block out of a 87 GT. Since it was a 87 just go with the 50 oz since it was a roller cam block possibly meaning that it was a H.O.?

jony51999 · November 29th, 2007, 06:13 PM

Originally Posted by shurb125

What exactly determines the choice and weight? Just looking to purchase one for a 306 engine build.

It depends on the rotating assembly you are going to run. Namely the crank. The crank throws on the crank shaft are different between the 28.2 OZ balanced engine and the 50 Oz balanced engine, the throw are smaller on the newer 50 Oz counter weighted crank. As was said before though, upgrading your balancer isn't really necessary if you are just building a moderate 6,000 rpm street engine. Save the money you would normally spend on a sweet balancer and go have a machine shop balance the rotating assembly instead.

shurb125 · November 29th, 2007, 06:48 PM

Using a new stock crank. Just looking to buy a new one, I just want the engine completly done so all I have to do is take the factory one out whole and set in the new one in. I plan on taking the block and have it bored thirty over and taking the new crank, new DSS pistons, factory connecting rods to the machine shop and have them balance the assembly, I guess that is what they call it. Will they tell me which one to purchase or will they need one before they can balance? Thanks for all your help and suggestions.

jony51999 · November 29th, 2007, 06:55 PM

Originally Posted by shurb125

Using a new stock crank. Just looking to buy a new one, I just want the engine completly done so all I have to do is take the factory one out whole and set in the new one in. I plan on taking the block and have it bored thirty over and taking the new crank, new DSS pistons, factory connecting rods to the machine shop and have them balance the assembly, I guess that is what they call it. Will they tell me which one to purchase or will they need one before they can balance? Thanks for all your help and suggestions.

I guess it depends on what you you are using for a rotating assembly, if when you say new crank you mean you are buying a pretty good crank that is capable of 5-600 hp, then by all means save up the few extra hundred dollars and buy a good balancer, this way if you decide to step it up later and add more power you will not need to have the rotating assembly rebalanced and you will not have to toss the new stock balancer and buy a good aftermarket replacement. I always used to run the ford motorsport billet steel one. I like how it looked and it was fully indexed for timing the engine.

shurb125 · November 29th, 2007, 07:20 PM

The crank is brand new OEM replacement, not eagle, scat or nothing like that.

jony51999 · November 29th, 2007, 07:51 PM

Originally Posted by shurb125

The crank is brand new OEM replacement, not eagle, scat or nothing like that.

just go with a stock replacement then.

1slo5.0 · November 30th, 2007, 04:17 AM

Originally Posted by shurb125

I don't know it it was a H.O. engine, I just know that the block came is a roller cam block out of a 87 GT. Since it was a 87 just go with the 50 oz since it was a roller cam block possibly meaning that it was a H.O.?

Is it the original engine? If so, it a high output.

shurb125 · November 30th, 2007, 08:13 AM

I beleive that it was the original engine, thanks for all you guys help.

ryans88gt · November 30th, 2007, 03:08 PM

You'll need the balancer you are going to use and the flywheel you are going to use if you want a spot on rotational balance. Otherwise you can get it balanced with whatever balancer and flywheel they have laying around in the shop and then when you put yours on, it will not be perfect, but close enough for a street engine.

shurb125 · December 2nd, 2007, 10:27 PM

Can anyone tell me if I need an external or internal balance harminic balancer?

flamestang · December 2nd, 2007, 10:33 PM

you should need a stock( 50oz)damper that is external.

1slo5.0 · December 3rd, 2007, 02:01 PM

External

November 26th, 2007, 09:40 PM	#1
shurb125 Regular 1993 Mustang LX Vert Join Date: Nov 2006 Location: South Carolina Posts: 437 iTrader: 0 reviews	Harmonic Balancer What exactly determines the choice and weight? Just looking to purchase one for a 306 engine build.

November 29th, 2007, 11:18 AM	#3
1slo5.0 MM Ninjas! 1990 Mustang LX 9.36@143 mph Join Date: Jan 2006 Location: North Fond du Lac, Wisconsin Posts: 11,375 iTrader: 1 reviews	What is wrong with your stock balancer? If it is bad and you need a replacement you will need to match the imbalance. 83-95 5 liter H.0. engines are 50 oz. Earlier 5 liters (302) are 28 oz. __________________ My daily driver has 16 cylinders and 4400hp @ 1000 rpm.... ***1988 Mustang GT - Stock....almost

November 30th, 2007, 03:08 PM	#12
ryans88gt MM Fanatic Join Date: May 2007 Location: Bloomington, IL Posts: 4,627 iTrader: 0 reviews	You'll need the balancer you are going to use and the flywheel you are going to use if you want a spot on rotational balance. Otherwise you can get it balanced with whatever balancer and flywheel they have laying around in the shop and then when you put yours on, it will not be perfect, but close enough for a street engine. __________________ 88 GT CHI headed 351w 10.8 @ 125 - still figuring it out. 03 Cobra 2.3 whipple 10.7 @ 129 - sold it 04 Mach 1 12.7 @ 109 mostly stock - sold it 89 LX procharged 302 515 hp 497 ftlbs 10.7 @130 mph - sold it

December 3rd, 2007, 02:01 PM	#15
1slo5.0 MM Ninjas! 1990 Mustang LX 9.36@143 mph Join Date: Jan 2006 Location: North Fond du Lac, Wisconsin Posts: 11,375 iTrader: 1 reviews	External __________________ My daily driver has 16 cylinders and 4400hp @ 1000 rpm.... ***1988 Mustang GT - Stock....almost

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November 29th, 2007, 08:17 AM	#2
shurb125 Regular 1993 Mustang LX Vert Join Date: Nov 2006 Location: South Carolina Posts: 437 iTrader: 0 reviews	Do I just need to purchase a factory replacement with the same weight?

November 29th, 2007, 05:35 PM	#4
shurb125 Regular 1993 Mustang LX Vert Join Date: Nov 2006 Location: South Carolina Posts: 437 iTrader: 0 reviews	I don't know it it was a H.O. engine, I just know that the block came is a roller cam block out of a 87 GT. Since it was a 87 just go with the 50 oz since it was a roller cam block possibly meaning that it was a H.O.?

November 29th, 2007, 06:48 PM	#6
shurb125 Regular 1993 Mustang LX Vert Join Date: Nov 2006 Location: South Carolina Posts: 437 iTrader: 0 reviews	Using a new stock crank. Just looking to buy a new one, I just want the engine completly done so all I have to do is take the factory one out whole and set in the new one in. I plan on taking the block and have it bored thirty over and taking the new crank, new DSS pistons, factory connecting rods to the machine shop and have them balance the assembly, I guess that is what they call it. Will they tell me which one to purchase or will they need one before they can balance? Thanks for all your help and suggestions.

November 29th, 2007, 07:20 PM	#8
shurb125 Regular 1993 Mustang LX Vert Join Date: Nov 2006 Location: South Carolina Posts: 437 iTrader: 0 reviews	The crank is brand new OEM replacement, not eagle, scat or nothing like that.

November 30th, 2007, 08:13 AM	#11
shurb125 Regular 1993 Mustang LX Vert Join Date: Nov 2006 Location: South Carolina Posts: 437 iTrader: 0 reviews	I beleive that it was the original engine, thanks for all you guys help.

December 2nd, 2007, 10:27 PM	#13
shurb125 Regular 1993 Mustang LX Vert Join Date: Nov 2006 Location: South Carolina Posts: 437 iTrader: 0 reviews	Can anyone tell me if I need an external or internal balance harminic balancer?

December 2nd, 2007, 10:33 PM	#14
flamestang Regular Join Date: Apr 2007 Posts: 338 iTrader: 0 reviews	you should need a stock( 50oz)damper that is external.

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