balancer upgrade?

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Sep 11, 2013 | 12:47 PM

#21

Blow Torch

Thread Starter

Melting Slicks

Joined: Nov 2003

Posts: 3,011

Likes: 9

From: Dublin GA

As I mentioned earlier, I was going to upgrade to a 8" to be able to use a larger blower pulley (for more wrap) but by my calculations, going from stock 7.5 to 8 would only change the pulley from a 3.1 to a 3.3, so not much more wrap

Sep 11, 2013 | 01:00 PM

#22

Robert 2000

Melting Slicks

Joined: Nov 2008

Posts: 2,008

Likes: 12

From: NOLA

^^^

But it does create more wrap on both the balancer and supercharger pulley.

Sep 11, 2013 | 01:24 PM

#23

Blow Torch

Thread Starter

Melting Slicks

Joined: Nov 2003

Posts: 3,011

Likes: 9

From: Dublin GA

Balancer wrap should be the same because the belt would follow the same path with no real difference caused by .2 tenths of an inch on a pulley that's two ft away from it.

Sep 11, 2013 | 09:22 PM

#24

rodsvet

Pro

Joined: Sep 2008

Posts: 660

Likes: 16

From: Tustin California

Check out Summitracing #c2501 balancer. It'd about $180 and It's SFI rated. I've been running mine for 3 years without any problems. It's an 8 rib but you can't use it for an 8 rib system as the belt runs on the 6 ribs that are closet to the radiator. My .02, Rod

Sep 12, 2013 | 11:21 AM

#25

mastercoryd

Instructor

Joined: Aug 2011

Posts: 210

Likes: 1

From: Johnston Rhode Island

Summit sfi ftw.. $200, my stock one wobbled b4 I even drove more then 2 min

Sep 12, 2013 | 12:49 PM

#26

Blow Torch

Thread Starter

Melting Slicks

Joined: Nov 2003

Posts: 3,011

Likes: 9

From: Dublin GA

Quote:

Originally Posted by 2003VETT

I have a brand new ATI 8 rib for sale. (917345). Stock diameter. Never been out of the box. 350 shipped.

Can these be drilled and pinned to the crank?

Sep 12, 2013 | 12:57 PM

#27

Robert 2000

Melting Slicks

Joined: Nov 2008

Posts: 2,008

Likes: 12

From: NOLA

Quote:

Originally Posted by Blow Torch

Balancer wrap should be the same because the belt would follow the same path with no real difference caused by .2 tenths of an inch on a pulley that's two ft away from it.

I was thinking that since the diameter is greater that the belt should have more on the balancer going around a larger radius. Then to use say a 3.2 to do the same job as 3.0 seems like a decent upgrade imo.

Sep 12, 2013 | 01:51 PM

#28

Blow Torch

Thread Starter

Melting Slicks

Joined: Nov 2003

Posts: 3,011

Likes: 9

From: Dublin GA

I see your point. The Circumference is a little larger, so a "little" more contact area.
Just a matter of deciding if the extra grip offsets turning all of my accessories faster and he extra $$ for an oversize

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Sep 12, 2013 | 02:03 PM

#29

fotoboy

Drifting

Joined: Oct 2004

Posts: 1,621

Likes: 6

Going from 7.5 to 8 in doesnt seem like alot but its more than you think. I got 4 psi when I upgraded. Some due to smaller dia and some do to crank pulley slip is my guess.