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Home
> Performance Mods
> Transmission / Drivetrain
> Launching and Dragging 101
Launching and Dragging 101
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Related threads: ( Click here to view ) Thread Topic Replies Views Author Last Poster PLEASE DONATE: New Donation System Launched! 95 2029 SqMK BearZ @ Oct 24, 2008 N2MB 2-Step Launch Control and No-Lift Shift Test Vid! 40 342 java09 java09 @ Oct 22, 2008 Pics of my tC at the drags 15 230 tCdriver08 tCdriver08 @ Sep 04, 2008 launching in an automatic. 26 332 EdgarG krdshrk @ Aug 26, 2008
Pages: 1 2 3 4 >>Web
- THE SHADOW
Ok, I want this thread to be all about pointers and suggestions from people whom have drag raced or those who have found good shifting techniques for racing. This is not condoning street racing but only an educational thread to help others for closed circuit racing.
Please, keep this on topic and no battles. If disagreements arise, please settle them quickly and in an adult manner.
Thanks,
Jeff
Complaining is futile when you supported the victory.
http://clubsciontc.com/fo...-rims--5x100-pattern.html[#] Feb 02, 2007 10:40am Web
- THE SHADOW
I'll start 
1800-2000 rpm clutch drop to get almost no wheel spin and all pull off the start.
Lower tires to 25 psi for better track grip (drag racing). Lower psi will allow more grip but also have a higher possibility that the tire can pop off the rim.
Shift at 6000rpm for maximum HP without losing a lot of torque for your next shift. This will put you right in the peak tq point on the dyno curve to help you pull hard in the next gear.
Complaining is futile when you supported the victory.
http://clubsciontc.com/fo...-rims--5x100-pattern.html[#] Feb 02, 2007 10:42am aDelcoTc
- Scion Guru
For some reason, I launch and shift my car WAY better when i've had a few beers...or am REALLY stoned.
Note: i am not advocating alchohol or pot use while driving. Just stating what i've noticed from personal experience.
but yeah, after a few beers, i can shift the tc like a DSG.
and i definitely get my best 60 fts... that way too.
Scion tc: Its essentially a 2 door Camry that spins up the tires quicker.....[#] Feb 02, 2007 11:21am hvtopiwala
- Godlike Advisor
quick question, not to go off topic, but my friend was showing me how he moves in traffic but i think hes killing his clutch. hes revving to like 6000 RPM's and feathers the thing like its a launch at 1000 RPMS lol. is that bad?
[#] Feb 02, 2007 11:44am Web
- THE SHADOW
- hvtopiwala wrote:
- quick question, not to go off topic, but my friend was showing me how he moves in traffic but i think hes killing his clutch. hes revving to like 6000 RPM's and feathers the thing like its a launch at 1000 RPMS lol. is that bad?
Does he leave in a lower gear a long time and keeps it up around 6000? If he's fully in gear, he's not doing anything bad to his clutch, just his engine.
Not sure if I understand the last part though..."feather the thing like it's a launch at 1000 rpms"...........so, he feathers the clutch the whole time he's weaving in traffic? If so, then yes, he's eating his clutch up b/c he's not letting it fully clamp to the pressure plate and it's slipping against the pressure plate.
Complaining is futile when you supported the victory.
http://clubsciontc.com/fo...-rims--5x100-pattern.html[#] Feb 02, 2007 11:53am hvtopiwala
- Godlike Advisor
lets put it this way, when im at a red light, i start to go at like 1000RPMS and feather the clutch to go smoothly. for him, when hes at a red light, he revs to 6000 RPMS and feathers it and gets the same gentle launch i do.
[#] Feb 02, 2007 11:59am Web
- THE SHADOW
He's eating his clutch so bad..............it'll start smelling like sulfur soon enough. Why would he do that at all? That's really bad driving.
Complaining is futile when you supported the victory.
http://clubsciontc.com/fo...-rims--5x100-pattern.html[#] Feb 02, 2007 12:02pm hvtopiwala
- Godlike Advisor
dunno, hes a idiot. i sometimes gentle launch at like 2500-3000 RPMS when i put my foot on the gas to much. but i dont do it often.
[#] Feb 02, 2007 12:04pm Web
- THE SHADOW
Yeah, that's normal. I do that on a hill sometimes but feather it quick to match the pressure plate to the clutch
Complaining is futile when you supported the victory.
http://clubsciontc.com/fo...-rims--5x100-pattern.html[#] Feb 02, 2007 12:06pm Greg50Lt
- Master Mechanic
the guy on here I luv my type s has good points about launchign the scion. took his advice of a PM and it helped out alot. gonna try it at the track to see if the 60'time is better then if i launch the way i do. will do both just to see.
[#] Feb 02, 2007 05:11pm Vicious
- El Chupacabra
Meh... should've gotten an automatic 
and just for people reading this thread and don't know what "feathering" and "dumping" the clutch is: feathering is when you gradually let go of the clutch while holding rpms to minimize wheel hop. Dumping the clutch is when you just let go of the clutch pedal completely while holding rpms and let the tires spin like crazy.
The Thread Killah
[#] Feb 02, 2007 07:16pm Orin
automatics have the 1st gear advantage hands down.
[#] Feb 02, 2007 07:19pm andino
- Godlike Advisor
i'm glad i don't have to worry about these things...but then i wish i drove a manual because it seems so much more fun. Plus then performance mods like CAI's or headers would do more good then with an auto. BTW any tips on how to launch an auto? I've never been to the track but would like to go sometime.
Are you in SoCal? Come to our CStC meets!
Located in Socal? Need something Installed?
Have a question and no one is willing to help? Shoot me a PM or hit me up on AIM.[#] Feb 03, 2007 12:55am nickah
- Vehicle Designer
^ just floor it?
You can't learn me nothin...[#] Feb 03, 2007 03:54am Vicious
- El Chupacabra
yea just floor it. Don't think about neutral dropping it either. While neutral dropping will let you launch from a higher RPM, you won't be able to control clutch engagement so you'll just spin your tires.
Neutral dropping - revving to desired RPM and shifting into D (drive).
The Thread Killah
[#] Feb 03, 2007 04:58am hvtopiwala
- Godlike Advisor
which is also bad on ur tranny
[#] Feb 03, 2007 09:36am Web
- THE SHADOW
x2.............just floor it and hang on
Complaining is futile when you supported the victory.
http://clubsciontc.com/fo...-rims--5x100-pattern.html[#] Feb 03, 2007 11:18am tougemII
- Tire Changer
does anyone have a problem with a lag when popping the clutch??
[#] Apr 23, 2007 01:08am Dr_Isotope
- Chief Mechanic
If you're feeling lag at the launch, you're not pushing down on the righthand pedal hard enough.
I launch from 3500, feather the clutch out to minimize wheelspin (with the 245s and the ETD, there's virtually no wheelhop), and do my damndest to move from 1-2 and 2-3 as close to 6400rpm as possible. My bad is that I tend to hold it a millisecond too long and hit the fuel cut every now and again.
To the folks worried about breaking their ish... don't race. Fast is driving it right up to the point of breaking it. If you're worried about the stink coming off of the clutch, or the potential ramifications of taking it past the redline every now and again... take up fly fishing.
Custom parts for your Scion tC: Doctor Isotope dot Com[#] Apr 23, 2007 02:16am Need4Speed305
- Detailer
so is it possible for a stock manual tc to beat a automatic tc w/ a CAI and Exhaust...and would it hurt the engine if u start at 1st gear in auto and work your way up to drive
[#] Apr 23, 2007 08:27am Web
- THE SHADOW
Yes, you can beat the auto.
Everyone here would most likely recommomend NOT shifting automatic gears. If you want to shift, you should have gotten a manual. The gears in the auto are for low traction scenarios (snow, high inclines) and are not meant to be used for shifting while "racing."
Complaining is futile when you supported the victory.
http://clubsciontc.com/fo...-rims--5x100-pattern.html[#] Apr 23, 2007 08:37am Vicious
- El Chupacabra
As a matter of fact, you'll go SLOWER if you go through the gears manually in an automatic 
The Thread Killah
[#] Apr 23, 2007 08:39am Need4Speed305
- Detailer
ok so explain how a manual beats a auto w/ CAI and exhaust
[#] Apr 23, 2007 08:41am Web
- THE SHADOW
Manuals have more whp to start with. The auto doesn't react the same as the manual (in any car really) to the mods. An intake that gives a manual about 7 whp will only give the auto about 4-5. An exhaust that may give a manual 3-5 whp (CAT back estimate) will only give the auto 1-2.
Manual tCs can fluxtuate their rpm points however they want where as the ECU of the auto is shifting at set points. Manuals are fully "manual" and can be driven however the DRIVER feels is appropriate.
Hope that helps.
Complaining is futile when you supported the victory.
http://clubsciontc.com/fo...-rims--5x100-pattern.html[#] Apr 23, 2007 08:44am Vicious
- El Chupacabra
Manual tCs can shift at optimum shift points when racing whereas automatic tCs can't. They shift at around 5k rpm.
The Thread Killah
[#] Apr 23, 2007 08:45am
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