New Gear Calculator
Race Director
Joined: Mar 2005
Posts: 11,549
Likes: 27
From: Southampton NJ
It's hard to have any calculator take into account all variables and they're good to help compare what changes different gears or tires will have, but they're not absolute just like dyno numbers aren't...which all they are is a calculated number, so I'm surprised you've even strapped your car down on one
Le Mans Master
Joined: Nov 2005
Posts: 7,059
Likes: 366
From: Kendall Park NJ
I had programmed in a 3% reduction in tire height as that was what got my cars closest to perfect @ 80mph (a good halfway point IMO). Since everyone wants it to line up with all of the other gear/speed calculators I took that 3% reduction away.
I made this to help others out and any suggestions for additional features or fixes would be appreciated.
Thanks,
James Karger
I made this to help others out and any suggestions for additional features or fixes would be appreciated.
Thanks,
James Karger
To deal with tire height, we always checked it on the rim or made an educated guess. Radials do not really grow while bias ply tires tend to grow a fair amount. We have used our calculator to select tires, rear axle ratios, trans ratios and to a certain extent cam choices. They can be a valuable tool when starting a build or just dialing one in.
