Negative rebound??
#1
Negative rebound??
I've been hearing about this over a few years now, but (-)rebound has always been something to avoid. But now I'm hearing and seeing racers using this as another tuning/suspension option.
4 questions -
1.) What is the 'action' on the car of a negatively rebounding shock?
2.) Under what circumstances would you want to use this?
3.) Is negative rebound 'tunable'...in other words, can you make the rebound repeatable in differing amounts as positive rebound?
4.) How does the use of shock oil come into play...if you use 30wt., can you still use it or would you have to go lighter or heavier?
Possibly something new to use in my repertoire , so bear with me guys
4 questions -
1.) What is the 'action' on the car of a negatively rebounding shock?
2.) Under what circumstances would you want to use this?
3.) Is negative rebound 'tunable'...in other words, can you make the rebound repeatable in differing amounts as positive rebound?
4.) How does the use of shock oil come into play...if you use 30wt., can you still use it or would you have to go lighter or heavier?
Possibly something new to use in my repertoire , so bear with me guys
#3
Tech Master
iTrader: (3)
I've been hearing about this over a few years now, but (-)rebound has always been something to avoid. But now I'm hearing and seeing racers using this as another tuning/suspension option.
4 questions -
1.) What is the 'action' on the car of a negatively rebounding shock?
2.) Under what circumstances would you want to use this?
3.) Is negative rebound 'tunable'...in other words, can you make the rebound repeatable in differing amounts as positive rebound?
4.) How does the use of shock oil come into play...if you use 30wt., can you still use it or would you have to go lighter or heavier?
Possibly something new to use in my repertoire , so bear with me guys
4 questions -
1.) What is the 'action' on the car of a negatively rebounding shock?
2.) Under what circumstances would you want to use this?
3.) Is negative rebound 'tunable'...in other words, can you make the rebound repeatable in differing amounts as positive rebound?
4.) How does the use of shock oil come into play...if you use 30wt., can you still use it or would you have to go lighter or heavier?
Possibly something new to use in my repertoire , so bear with me guys
#5
Tech Master
#6
Guest
Negative Rebound? Is that like getting dumped by an ugly chick and then end up dating her friend who is even uglier? Where you been bro? lem
#7
If by "negative rebound" you mean a shock shaft that is pulled back in to the shock when extended... I would never use it.
In my opinion, RC dampers are very simple, so build them in a repeatable way where all they do is damp as linearly as possible.
To get negative rebound you are going to have to mess around wth bleeding the shock in such a way that it has less oil in it that it naturally builds with. Not easy to do consistently with a bladder shock.
Personally, the only tuning I would consider doing to the difference between bump and rebound is in the bladder (and bladder insert if you like a strong rebound for smooth, grippy surfaces). I just build shocks with a soft (normally the standard) bladder and leave it at that! I might even drill the caps to get rid of the air pressure effect on rebound.
PS a full size car would never use negative rebound - the effect would be "jacking down" where the suspension would not recover quickly enough from bumps and the car's ride height would gradually drop to the floor.
In my opinion, RC dampers are very simple, so build them in a repeatable way where all they do is damp as linearly as possible.
To get negative rebound you are going to have to mess around wth bleeding the shock in such a way that it has less oil in it that it naturally builds with. Not easy to do consistently with a bladder shock.
Personally, the only tuning I would consider doing to the difference between bump and rebound is in the bladder (and bladder insert if you like a strong rebound for smooth, grippy surfaces). I just build shocks with a soft (normally the standard) bladder and leave it at that! I might even drill the caps to get rid of the air pressure effect on rebound.
PS a full size car would never use negative rebound - the effect would be "jacking down" where the suspension would not recover quickly enough from bumps and the car's ride height would gradually drop to the floor.