8 or 6 3/4 inch balancer - The 1947 - Present Chevrolet & GMC Truck Message Board Network

skokie · 07-21-2005, 05:35 PM

I was told that the 6 3/4 balancers are the for small blocks and the 8's are use on big blocks however I have seen 8s on small blocks so heres the quesitons. Does it matter which one you use? Do you have to do anything special to use a 8 on a small block?

Thanks

**pjmoreland** · 07-21-2005, 05:39 PM

The timing pointer might be an issue. There could be interference.

Fred T · 07-21-2005, 05:42 PM

Both sizes work on the sbc. My truck, with the 300 hp 350, had a factory 8" balancer on it. The bigger balancer is supposed to do a better job of damping. I switched mine out for a 6-3/4" Streetdampr, which should be better than an old 8" with dried-out rubber.

You will need a different timing pointer. I got an adjustable and set it after degreeing the cam.

**pjmoreland** · 07-21-2005, 05:46 PM

If you are in need of a 6 3/4" balancer, I've got one that is practically new that you can have for free. I tried selling it a few months ago, but there were no takers. I'll be in Mountain View on Monday and Tuesday.

skokie · 07-21-2005, 06:24 PM

Pjmoreland. I already have a new one on the 350 just curious what the differnece was. Thanks for the offer though.

**tnblazerk5** · 07-21-2005, 06:54 PM

not to steal the tread but i got a ? what size came on a 327 ? i have got small thin one on there ,iwas wondering if a bigger one would fit and could i keep the same pullys and everything line up ?

07-21-2005, 05:35 PM	#1
skokie Registered User Join Date: Oct 2003 Location: San Jose Ca. Posts: 3,334	8 or 6 3/4 inch balancer I was told that the 6 3/4 balancers are the for small blocks and the 8's are use on big blocks however I have seen 8s on small blocks so heres the quesitons. Does it matter which one you use? Do you have to do anything special to use a 8 on a small block? Thanks __________________ RIP to my son Dylan. 5/17/2002 - 8/18/2018 If you want to know more about rare forms of pediatric cancer or if you want to help fund pediatric cancer research, please check out the website for the non-profit I started. https://slothforpedcancer.org 68 build thread http://67-72chevytrucks.com/vboard/s...d.php?t=223234

07-21-2005, 05:42 PM	#3
Fred T Cantankerous Geezer Join Date: Aug 2002 Location: Bel Aire, KS Posts: 6,264	Both sizes work on the sbc. My truck, with the 300 hp 350, had a factory 8" balancer on it. The bigger balancer is supposed to do a better job of damping. I switched mine out for a 6-3/4" Streetdampr, which should be better than an old 8" with dried-out rubber. You will need a different timing pointer. I got an adjustable and set it after degreeing the cam. __________________ Fred There is no such thing as too much cam...just not enough engine. Last edited by Fred T; 07-21-2005 at 05:45 PM. Reason: massive brain fart

07-21-2005, 06:24 PM	#5
skokie Registered User Join Date: Oct 2003 Location: San Jose Ca. Posts: 3,334	Pjmoreland. I already have a new one on the 350 just curious what the differnece was. Thanks for the offer though. __________________ RIP to my son Dylan. 5/17/2002 - 8/18/2018 If you want to know more about rare forms of pediatric cancer or if you want to help fund pediatric cancer research, please check out the website for the non-profit I started. https://slothforpedcancer.org 68 build thread http://67-72chevytrucks.com/vboard/s...d.php?t=223234

07-21-2005, 05:39 PM	#2
pjmoreland Senior Member Join Date: Jan 2005 Location: CA Posts: 5,426	The timing pointer might be an issue. There could be interference.

07-21-2005, 05:46 PM	#4
pjmoreland Senior Member Join Date: Jan 2005 Location: CA Posts: 5,426	If you are in need of a 6 3/4" balancer, I've got one that is practically new that you can have for free. I tried selling it a few months ago, but there were no takers. I'll be in Mountain View on Monday and Tuesday.

07-21-2005, 06:54 PM	#6
tnblazerk5 User #12137 Join Date: Apr 2004 Location: kingsport,upper east tenn Posts: 11,598	not to steal the tread but i got a ? what size came on a 327 ? i have got small thin one on there ,iwas wondering if a bigger one would fit and could i keep the same pullys and everything line up ?



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