Line Lock - Wheelspin Feeling Afterwards

[ripto]

I've got a question about the specifics of what to do when you are in that 15 second period during line lock and wanted to bring up a concern of mine that happened after.

I tried it a few weeks ago after it rained but I believe I didn't rev it high enough and I was slow to let out the clutch in fear of stalling. That resulted in a nasty smell for about 30 seconds which I am assuming was the clutch. The tires did not spin at all. I called it quits.

Today I went and tried it again after it rained and I rev'd it higher, to about 3.5-4k and released the clutch in one smooth quick motion, but didn't completely dump it. There was some jerking and as the load on the engine dropped the RPM, I gave it more and went to about 6k and the tires broke free. I kept it around 3k for a few seconds, then as I was approaching the end of the timer I was expecting it to launch but it didn't, maybe that was as designed?

After this though is what I am concerned about. When I tried to get going, the car felt like it didn't want to move. It felt like I needed to give it more gas to go. For about the next 15 minutes or so, I noticed that taking off from a stop seemed more laborious, and I felt what seemed similar to wheel spin, but I was not giving it nearly enough gas for it to actually slip. I read on another thread that instead of what I thought were my tires spinning during the whole time of my line lock, it could have been clutch slip, causing it to overheat along with the flywheel and cause some high spots. I definitely heard and smelled my tires, but couldn't quite tell if I smelled clutch. The clutch would then be rotating over these high spots and give the similar feeling of wheel spin.

It seems to have gone away, but I am wondering what really happened or what caused that illusion of wheel slip on my takeoffs afterwards.

I would also love to see someone video their dash during a line lock so I could better understand what I should be doing. Obviously I would like to avoid unnecessary clutch and drive train wear, so that is why I did not completely dump the clutch, but I wonder how much slip is acceptable, or if maybe that's what caused those "high spots" I mentioned.

Any advice would be helpful. Thanks!

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[Anthony 05 GT]

It sounds like you may be lucky and got away without completely destroying the clutch. Doing a burnout you should let the clutch pedal out fairly quickly and completely with the engine speed at a 2500-3000 rpm range give or take. I don't think I'd do a full 15 second burnout unless I wanted to destroy tires.

 

[Pero]

 

[Pero]

The dash during the line-lock when properly done:

 

[ripto]

My first attempt was slipping the clutch but I knew I was so I stopped pretty quickly. Today was tires. I was mainly concerned about taking off from a stop after I did the line lock. I didn't think I slipped the clutch excessively today. I did some more searching and it seems other people have noticed the same thing, after a line lock a feeling as if the wheels were slipping when going from a stop. Mine seems to have gone away though.

I saw that video of the dash but that's an auto and really doesn't show you how much to rev it before letting the clutch out. Just step on the pedal and let the car do it's thing.

 

[Shifting_Gears]

Revving the engine and dumping the clutch is the most effective way. The rear tires are shocked loose by doing this, so the impact to the clutch is not anything beyond the abuse of the burnout itself. Slipping the clutch creates a lot of heat and it does sound like you overheated it and were smoking the clutch versus tires.

Is the engagement ok after it cooled down?

 

[jrsimon27]

Just drop the clutch thats the way you should do it if you slip it or give it a quick slip it will get toast.

 

[ripto]

I think everything is fine. I did feel wheel slip on occasion today but I attribute that to wet roads and the fact that I like to run with nannies off. I think if I did have a problem, it would be present on EVERY take off rather than just one here and there. I am wondering if when I thought I fine running at 3K thinking my tires were spinning, maybe they weren't, and maybe just my clutch was spinning. I really don't remember smelling clutch this second time so I'm really surprised I had this issue now and not after my first attempt where it was 100% clutch.

 

[Anthony 05 GT]

If you damaged the clutch you'll notice slippage when pulling a hill in upper gears. For example, in 5th or 6th gear going up a hill while rpm's are lower, hit the go pedal to the floor and you'll hear the engine rev higher without gaining any speed if the clutch is slipping. If that doesn't happen you dodged a bullet. Never do a burnout without quickly releasing the clutch on engagement.

 

[ripto]

Thanks I will try that today and report back.

I am taking away from this that there is no real way to do a burnout without putting stress on something, either the clutch in my case or the drive train on a clutch dump. True?

 

[ripto]

Didn't notice anything out of the ordinary. I was at 2K RPM in 5th and went hard on the throttle and didn't hear or feel anything. Didn't want to push it WOT since that's a low RPM for that gear and hill... Think I'm in the clear.

 

[Anthony 05 GT]

You're probably ok

 

[ripto]

Thanks for the help.

 

[Braski]

The higher rpm you drop the clutch the less stress you put on it. To be honest it sounds like most guys would be better just doing an old fashion power brake. If done correctly minimal rear brake wear occurs. Rev up to 6k, dump clutch, jab break quickly but lightly with left foot and then release break after smoke show and roll out of burnout for 10-15 foot pedaling the gas until traction regains. Don't get crazy and try to completely burn out through 1st or 2nd. Crowd crusher emblems are available on the web. Have fun but be safe!

 

[scrubber3]

The higher rpm you drop the clutch the less stress you put on it. To be honest it sounds like most guys would be better just doing an old fashion power brake. If done correctly minimal rear brake wear occurs. Rev up to 6k, dump clutch, jab break quickly but lightly with left foot and then release break after smoke show and roll out of burnout for 10-15 foot pedaling the gas until traction regains. Don't get crazy and try to completely burn out through 1st or 2nd. Crowd crusher emblems are available on the web. Have fun but be safe!

What he^ said

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