Best RPM to Launch at for 1/4 MT?

Phimosis · 07-24-2010, 08:32 PM

Street tires don't work great on a well prepped track. They will stick better than on bare pavement, but when they start to let go, they let go all at once.

Slicks will give a more progressive loss of traction.

With that said, you launch at 3,000 rpm on the street and you get a steady controled wheelspin and off you go. At the track, 3,000 rpm wont yield any wheelspin and you'll likely bog the engine for a slow start.

Launch it at 3,500 and let the clutch out too fast and your tires will be up in smoke.

As a baseline, I would try 3,500 and let the clutch out nice and controlled. The key is to not get too excited and let the clutch out too fast. ;-)

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
VDC - TCS actual launch test	Hi-Step'n370Z	Engine & Drivetrain	13	03-28-2010 04:50 PM
Smooth launch in 1st Gear?	BrianMSmith	Nissan 370Z General Discussions	22	03-26-2010 10:40 PM
7AT Launch RPM and VDC	Jason	Track / Autocross / Drifting / Dragstrip	2	09-11-2009 03:58 AM
Launch RPM	GingaBreadMan	Track / Autocross / Drifting / Dragstrip	3	08-14-2009 12:12 AM
RPM Launch?	eXo5	Track / Autocross / Drifting / Dragstrip	15	05-22-2009 11:40 AM

07-24-2010, 08:32 PM	#3 (permalink)
Phimosis Enthusiast Member Join Date: May 2009 Location: Oildale, CA Posts: 412 Drives: 2013 911 4S Rep Power: 416	Street tires don't work great on a well prepped track. They will stick better than on bare pavement, but when they start to let go, they let go all at once. Slicks will give a more progressive loss of traction. With that said, you launch at 3,000 rpm on the street and you get a steady controled wheelspin and off you go. At the track, 3,000 rpm wont yield any wheelspin and you'll likely bog the engine for a slow start. Launch it at 3,500 and let the clutch out too fast and your tires will be up in smoke. As a baseline, I would try 3,500 and let the clutch out nice and controlled. The key is to not get too excited and let the clutch out too fast. ;-)