Originally posted by RC
Damn fine debate in this thread.
Is it safe for the readers of this thread to conclude that the amount of front overdrive is a matter of personal preference? That is, the less percentage of front overdrive is fast but gets twitchy; so how much twitch can you drive.
If my math is right (it often is not,) the V One RR with its 25T middle belt driven pulley has about an 8% bias to the front. Then I look at some serpent charts and see percentages like 1% to the front.
What are some overdrive percentages that are being used (ammdrew & modellor)?
Which Serpent chart are you looking at?
On the Serpent Impulse / Impact, overdrive is usually used to compensate for different wear rates on the front and rear foams. Rear usually wears faster. A split of about 2 to 3 mm diameter difference between the front and the rear is usually used (i.e. front smaller than rear). Don't know how many percent overdrive that translates too in order for you to have to run that split. You can refer to the website here to automatically calculated overdrive.
Julius Kolff (Serpent Holland driver at the Worlds) usually drives a split of about 3 mm on the Impulse PRO. I don't think it's because of tire wear but he claims that by using a split, you are able to sit the front suspension closer to the position the car was designed to. For other cars, I don't know if this works right.
BTW, ammdrew is not able to respond because he's competing in the 200 mm World Cup
GO SERPENT !