why does JIC magic use 7kg/5kg --;
They like increasing understeer on the S13 or what? :greddy:
They like increasing understeer on the S13 or what? :greddy:
w1ngzer0
Spring Rate Changes (def. important for those who dont pay att. to this)
Modification - Effect on Suspension
Increase front and rear rate - Ride harshness increases; tires may not follow bumps causing reduced traction. Roll resistance increases.
Increase front rate only - Front ride rate increases. Front roll resistance increases, increasing understeer or reducing oversteer.
Increase rear rate only - Rear ride rate increases. Rear roll resistance increases, increasing oversteer or reducing understeer.
Decrease front and rear rate - Ride harshness decreases; tires follow bumps more effectively, possibly improving traction. Roll resistance decreases.
Decrease front rate only - Front ride rate decreases. Front roll resistance decreases, decreasing understeer or increasing oversteer.
Decrease rear rate only - Rear ride rate decreases. Rear roll resistance decreases, decreasing oversteer or increasing understeer.
This is why i asked this question. Decreasing the spring rate in the front or back may increase or decrease understeer. So with this. Why did JIC magic increase the front spring rate?
But what doesn't make sense to me is why do they use that spring rate for the S14 and 13...
kei office uses
S14:8kg/7kg
S13:7kg/6kg
interesting, so i guess i had it backwords :gaylaugh
Modification - Effect on Suspension
Increase front and rear rate - Ride harshness increases; tires may not follow bumps causing reduced traction. Roll resistance increases.
Increase front rate only - Front ride rate increases. Front roll resistance increases, increasing understeer or reducing oversteer.
Increase rear rate only - Rear ride rate increases. Rear roll resistance increases, increasing oversteer or reducing understeer.
Decrease front and rear rate - Ride harshness decreases; tires follow bumps more effectively, possibly improving traction. Roll resistance decreases.
Decrease front rate only - Front ride rate decreases. Front roll resistance decreases, decreasing understeer or increasing oversteer.
Decrease rear rate only - Rear ride rate decreases. Rear roll resistance decreases, decreasing oversteer or increasing understeer.
This is why i asked this question. Decreasing the spring rate in the front or back may increase or decrease understeer. So with this. Why did JIC magic increase the front spring rate?
But what doesn't make sense to me is why do they use that spring rate for the S14 and 13...
kei office uses
S14:8kg/7kg
S13:7kg/6kg
interesting, so i guess i had it backwords :gaylaugh
"Increase front and rear rate - Ride harshness increases; tires may not follow bumps causing reduced traction. Roll resistance increases"
They're increasing front AND rear. Not just increasing the front rate. Maybe someone can get more technical. But it seems like your answer is already there,
"Increase rear rate only - Rear ride rate increases. Rear roll resistance increases, increasing oversteer or reducing understeer." Kei office has more oversteer characteristics than the JIC.
They're increasing front AND rear. Not just increasing the front rate. Maybe someone can get more technical. But it seems like your answer is already there,
"Increase rear rate only - Rear ride rate increases. Rear roll resistance increases, increasing oversteer or reducing understeer." Kei office has more oversteer characteristics than the JIC.
Because it's a mid ship chassis. Engine is right behing the seats, so it has balance the weight.
This reminds me of that story of the cop that went to go search for a speeding racer that parked at the restaurant and he checked the front of the car, only to find it was cold. But he didn't know the engine was in the rear. hah
This reminds me of that story of the cop that went to go search for a speeding racer that parked at the restaurant and he checked the front of the car, only to find it was cold. But he didn't know the engine was in the rear. hah
well usually when braking, the front springs are more loaded than the rears right? thats assuming you're not ebraking and actually truly driving using weight transfer. Most of the weight of the car will be loaded into the front suspension, so therefore you need stiffer front springs.
MR2s have such a rearward weight bias because of the engine, they need stiffer springs in the rear to achieve the same effect as the 240 suspension with the engine in the front.
and of course there are all the other things that have been named to fine tune suspension.
MR2s have such a rearward weight bias because of the engine, they need stiffer springs in the rear to achieve the same effect as the 240 suspension with the engine in the front.
and of course there are all the other things that have been named to fine tune suspension.
Nice useless POSTS. E-drifitng punk. :thumbsdowdousan said:
Increasing both the front and rear keeps the car in balance. Different cars all respond to different spring rates. The higher the spring rate, the less traction that end of the car has. Not taking the effect of throttle into the equation, a car with those spring rates will be out of balance. But since the 240 is rwd, the application of power from the rear wheels will reduce the traction on that end of the car, essentially leveling out the balance. It's the same reason why good fwd race cars have low spring rates up front and high ones in the back.
A huge reason why companies sell kits that promote understeer is liability. An understeering car is much safer, especially for people like dousan. Most of the suspension companies allow you to order custom replacement spring rates.
Like someone else said though, there are other ways to influence over and understeer. Each method has its pros and cons though. Covering up a problem with adjusting the sways that should be fixed with different spring rates will never be as good as a proper setup. There are a ton of other factors that are involved in a vehicle setup that I won’t even go into right now.
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