how to launch my fc
02-06-05, 12:09 AM
#26
Just Call Me Terminator!
iTrader: (4)
Join Date: Feb 2001
Location: NJ
Posts: 7,848
Likes: 0
Received 0 Likes
on
0 Posts
my best 60FT n/a on street tires was 2.0
my best 60FT T2 on kumho 712's was 1.8
i launch off the rev limiter and just drop it. always get the best 60 FT for me that way.... breaks alot of expensive but that is part of drag racing
my best 60FT T2 on kumho 712's was 1.8
i launch off the rev limiter and just drop it. always get the best 60 FT for me that way.... breaks alot of expensive but that is part of drag racing
02-06-05, 12:35 AM
#27
Rotary Enthusiast
Join Date: Jan 2003
Location: fl
Posts: 1,255
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by Karack
is it a turbo or non? this makes a huge difference in how to launch.
as far as shift points, it all depends on the peak output of your engine, shifting right as the horsepower apexes is what you want, this is usually at around 7200 RPMs. some people don't let up on the throttle when shifting but this sounds like severe engine and tranny abuse but it is all how you percieve and treat your car.
as far as shift points, it all depends on the peak output of your engine, shifting right as the horsepower apexes is what you want, this is usually at around 7200 RPMs. some people don't let up on the throttle when shifting but this sounds like severe engine and tranny abuse but it is all how you percieve and treat your car.
this is right and wrong. you dont want to shift when power reaches its max, you want to shift so that you put "the most power under the curve" in each gear which will mean shifting a little bit after max power. however, on an s4 na that probobly will be about 7200 rpm.
my technique is to slip at about 4000. realy you dont want to drop the clutch on an n/ a unless you have the suspension dialed in to stop wheel hop and you have the budget to break your whole driveline sooner or later. n/a drive-lines are weak. i know i could do better from about 6-7k but my clutch is on its way out and can only handle under 4500, but it bogs at like 3500 so its a real PITA to get a good launch with my car right now.
the whole point is to get as much power to the ground as your engine can give, your driveline can transfer and your tires can grip, keep that in mind and just experiment.
02-06-05, 05:37 AM
#28
88 AE
Join Date: Mar 2002
Location: N/A
Posts: 2,865
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by geargrabber
if i slip the clutch too much, the clutch will continue to slip with my foot off the clutch.
i need a new pressure plate? the clutch disc has maybe 8k mi on it.
anyways, getting back on topic of the post, i launch at 3-4k on the street doing the clutch slip method. Clutch dumping is rape and drama.
i need a new pressure plate? the clutch disc has maybe 8k mi on it.
anyways, getting back on topic of the post, i launch at 3-4k on the street doing the clutch slip method. Clutch dumping is rape and drama.
02-06-05, 01:50 PM
#29
zoom zoom go boom
Best way I've found is to rev to 5k and slip the clutch kinda quickly, but be careful not to be too quick. Car will launch and may wheel spin at the top of the rpms, but dont shift quite yet cause then it'll catch traction and the rpms will fall a tad then shoot back up and at 7k, SHIFT! Run through 2nd and etc.
02-06-05, 03:20 PM
#30
IFO Forced Induction Slo
iTrader: (3)
Join Date: Mar 2004
Location: Houston
Posts: 1,315
Likes: 0
Received 0 Likes
on
0 Posts
90 Vert with original bbs rims out back. I launched at 6800 rpms and shirted at 7800 rpms. Cmon dDuB, not lowering the tire pressure at the track...why not. Well I had to lower the pressure in mine to about 17 psi since the track felt a little slick than some of the streets we drag race at. Ive had over 100 runs at Houston Raceway Park, with various mods. When my vert was completely stock. I wouldnt loss traction for anything. But with an exhaust and intake, I had to lower the tire pressure to continue a 6k rpm+ launch. I used to always skip the water but then i learned how to actually get the tire hot. As a rule of thumb that a older felloe told me. If your tires make that chirpping noise after your burnout, then there sticky. Thats my .02
02-06-05, 04:39 PM
#32
88 AE
Join Date: Mar 2002
Location: N/A
Posts: 2,865
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by totallimmortal
i launched my s4 na at 6800 and it is great although i have broken an axle my 60ft time was 2.1 before i got new tires and a posi
Thread
Thread Starter
Forum
Replies
Last Post
alfred1976
RX-7 Audio/Visual Lounge
3
12-03-15 03:06 AM