Another discussion of launching
01-10-2007, 08:10 PM
#11
Originally Posted by chino101,Jan 10 2007, 04:00 PM
Have yet to do a hard launch in my car, which is my daily driver, and don't plan to. My train of though was that enough force still has to be applied to the rear tires to exceed the static friction force to cause them to spin. Once the tires are spinning it takes less force to keep them spinning; transition from static to kinetic friction.
Although I can start to see that the difference here is that an impact load that is applied to the wheels such that a spin is impending has a longer duration, verses one that cause the wheel to spin almost instantaneously.
Although I can start to see that the difference here is that an impact load that is applied to the wheels such that a spin is impending has a longer duration, verses one that cause the wheel to spin almost instantaneously.
When a person goes to punch a board in half he must realize that punching through the board is going to hurt a lot less then TRYING to punch through the board but failing.
Same thing works for a car. It doesn't hurt nearly as much to get the tires spinning as it does to TRY to get the tires to spin but fail.
Either way it hurts but one is a lot less.
To go more physics related essentially if you are able to get the tires to spin your dealing with kinetic friction (you can negletic the intial static friction since its almost instantenous) which is considerably smaller then static. When you try to spin but fail, your dealing with static friction.
Fairly simple when you think about it
01-10-2007, 08:19 PM
#12
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Originally Posted by chino101,Jan 10 2007, 01:00 PM
Although I can start to see that the difference here is that an impact load that is applied to the wheels such that a spin is impending has a longer duration, verses one that cause the wheel to spin almost instantaneously.
The longer it takes for the load to be released from the wheels, the longer the drive shaft/differential/gears have to absorb it, hence bogging.
Bog it enough, something will break, most likely the differential.
Remove the CDV or replace with an AP1 Slave. Either one will work.
Tim
01-10-2007, 10:37 PM
#13
Registered User
Originally Posted by 03S2kStud,Jan 10 2007, 02:57 PM
KnowledgeIsPower, nice!!! =)
Shotiable, CDV only applies to AP2's, as previously stated!
Shotiable, CDV only applies to AP2's, as previously stated!
01-11-2007, 11:39 AM
#15
Originally Posted by afwfjustin,Jan 10 2007, 11:06 PM
Why don't AP2 drivers convert to the AP1 clutch delay valve? Everyone in my local club does it. If I had an ap2 it'd be the first thing I did
The AP1 clutch slave cylinder does not have a clutch delay valve (CDV).
However, the AP2 clutch slave cylinder does have a CDV.
Now, to remove the affects of the CDV on CDV equipped S2000, one can either remove the CDV (per a great DIY on these boards) or swap the entire AP2 clutch slave cylinder for an AP1 clutch slave cylinder. But, then you have to shell out the dough for the AP1 slave cylinder.
For the record, it's been stated a couple times on the boards that some of the later 2003 MY S2000s were equipped with the AP2 slave cylinders and therefore have a CDV.
01-11-2007, 11:43 AM
#16
Originally Posted by Carbon Blue,Jan 11 2007, 02:54 PM
wait a minute you cant clutch drop (or sidestep) the clutch in an ap2 when launching even with the cdv in place?
However, the purpose of the clutch delay valve is to slow the engagement of the clutch during fast shifts (or sidesteps) in an effort to save the drivetrain, yet at the expense of wearing the clutch. The result is that you'll most likely burn up the clutch in a heartbeat. 
Best thing to do is not launch your car (AP1 or AP2), but that's a whole different discussion. And many still choose to remove the CDV just to improve clutch engagement and performance on fast shifts.
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