Welcome Guest! To enable all features please Login or Register.
Options
View
Go to last post Go to first unread
teamz51  
#1 Posted : Tuesday, August 30, 2016 2:02:49 AM(UTC)
teamz51

Rank: Newbie

Groups: Registered
Joined: 1/3/2015(UTC)
Posts: 6

Thanks: 1 times
How or does chain angle affect the handling of a car? The 13 ZX6R has an output sprocket roughly an inch higher that the Yamaha R6. With all things the same, like engine placement, height, weight, etc. and the only difference is the sprocket being an inch higher as to change the chain angle, how does the affect handling?
Mike Dicely  
#2 Posted : Tuesday, August 30, 2016 6:55:47 AM(UTC)
Mike Dicely

Rank: Administration

Groups: Administrator, Pay Per View, Administrators, Registered
Joined: 2/1/2011(UTC)
Posts: 729
Man
United States
Location: Etters, PA

Thanks: 1 times
Was thanked: 129 time(s) in 128 post(s)
The big thing that changes in that situation is not the chain angle, although that does change, it does not affect the car much, but the distance between the sprocket and the instant center (center of rotation) of the rear axle does change things. This distance changes how much the chain changes tension as the car rolls left and right. The greater this distance the more the chain tension changes. Also as the front sprocket raises above the instant center, the chain force will make that corner of the car squat under acceleration. Of course anything you do to lower the center of gravity of the car will hurt forward drive, this could be good or bad depending on what handling characteristics you are looking for.

But the chain angle itself does not really matter.
mikel_ny  
#3 Posted : Wednesday, July 26, 2017 2:27:20 PM(UTC)
mikel_ny

Rank: Member

Groups: Registered
Joined: 7/1/2012(UTC)
Posts: 19

Thanks: 5 times
I thought the lower the front sprocket the tighter the car on throttle and the higher the front sprocket the looser the car will be on the throttle, all else being equal?
Mike Dicely  
#4 Posted : Wednesday, July 26, 2017 2:33:39 PM(UTC)
Mike Dicely

Rank: Administration

Groups: Administrator, Pay Per View, Administrators, Registered
Joined: 2/1/2011(UTC)
Posts: 729
Man
United States
Location: Etters, PA

Thanks: 1 times
Was thanked: 129 time(s) in 128 post(s)
Looking at chain force and its effect on the chassis, as the front sprocket moves down it will cause the car to raise up more when the chain is under load. Raising up the chassis will cause more weight to transfer from the front to the back. It will also cause more weight to transfer from the left to the right. The former will generate more forward drive, the later will result in less rear traction due to the rear tires becoming more unequal in weight. (Read Re-think Dirt for a better explanation on this)

But consider too, when you lower the front sprocket, you are also lowering the entire 150 pound engine which will lower CGH. You can achieve the same chain force effect by raising the LS wishbone mount on the frame. A big problem with doing that is you will need to run a good double chain tensioner as the chain will get looser and tighter as the car rolls.
Users browsing this topic
Guest (2)
Forum Jump  
You cannot post new topics in this forum.
You cannot reply to topics in this forum.
You cannot delete your posts in this forum.
You cannot edit your posts in this forum.
You cannot create polls in this forum.
You cannot vote in polls in this forum.

Notification

Icon
Error