1/4 Mile Technique

[wickedtyper]

HEY GUYS, i recently ran at heathcote, i have a 2000 ITR with I/H/E it was stinking hot, running into a strong wind and with very VERY shit tyres. I ran a 14.87 at 94 mph. My question is what is most peoples techniques for launching off the line??? and what time did they get and mph. Ie. what rpm did you launch at?? and did you drop the clutch? or did you ride it a lil bit? ie. let it out slowly? On my crappy runs (15's) i dropped the clutch and got wayyyyy too much wheel spin, but then on my better runs (14's) i rode the clutch a bit (engaged it slower) while holding the accelartor steady until wheel spin stopped. if i did this time in these conditions i cant wait to do a run with a proper airbox (no heat soak) better tires (215's perhaps) and a cold night.... should do 14.2 ish??? so yeah i look forward to it.

[crx51]

Sounds like the conditions didnt phase your car too much then. 14.87 is a pretty good time. Well done mate. Keep us updated on your future times. 14.2 is pretty damn quick if you get that then you should be real happy i reckon. Id love to have a type r to park next to my crx. Couldnt sell the crx for one though, love it too much.
Keep the posts coming then mate.

[locote]

Mid 14s mate... with good take off low 14s..
i ran 14.2@96mph 2 mph more than you so id say for sure ud be a able to do it...

[Drew]

It depends on your tires/clutch/suspension whether you ride or dump the clutch but I pretty much always dump the clutch...

But then again I really don't care much for drag racing although it is great fun ^_^

Only advise I can give you is that practice makes perfect

You don't have to worry about everything at once, just worry about getting your reaction down to a consistently low time, then worry about the 60' time, then worry about the 400m and trap speed. Just take one step at a time...
But for now just give it a good thrashed and get used to drag racing, then focus on getting the times down

[silver_screen]

mph doesnt mean same times.. geez

i could run a 10sec pass in my rx7 @ 96mph lol, doesnt mean anything.. Its how well u do in the 60ft as well as the rest of the run.

If you do an incredible 60ft time say 1.8sec in ur fwd but because u havent got any power, youll still get a reasonable time. 14.8 is a great time and dont think for a second that because u dont have wind this time, or better tyres that ur gonna shave off .6sec of ur time.. if you dont have the power to keep the car accelerating.. you wont improve too much. i reckon your lookin @ mid 14s unless you get urself the perfect launch :) then its low 14's

[locote]

10sec pass at 96mph..
ummm can be done if u slam your brakes on and decrease your speed before crossing line..

[.::F[L]Y::.]

just all about practice.

[barefootbonzai]

not sure what you were expecting. thoughs times sound pretty normal.

what was your 60foot time? And was the car running full interier?

[wickedtyper]

thanks guys.... but 14.8 is shit for headers, exhaust and racing intake( exposed filter).... i know for a fact 14.2 is possible (maybe lower, with pefection).... i had full interior and a few traction problems.... but as soon as i slipped the clutch better take offs were possible... dumping the clutch just got wayyyy too much wheel spin. The reaction time means shit... u can sit there for a day and still get a good time.... the timer isnt triggered till you cross the beam. My 60' times were 2.4 my best being 2.36 however due to bad conditions everything was shit. Again you guys are right though practice makes perfect and it was my first time. Ill let you guys know when better tires go on, an air box goes on and i actually run on a cold night.

[wickedtyper]

oh... and a few runs i did that were in the 15's with no traction i ran 96-7mph... so power/ speed wasnt a problem... just finding the sweet spot and getting the clutch control right coupled with quick shifts was hard to do

[barefootbonzai]

Of course 14.2 is possible, but it's funny when reality hits people, there are lot of things you still need to do. For example most that get low 14's with I/H/E have Stripped interior, good tyres (semi's even at times), right tyre pressure, better launch ie 60foot time. 2.0~2.2 on ordinary street tyres, 1.9~2.0 on semi's, 1.7~1.9 on slicks would be what you'd expect from most guys that have been down the strip a few times.

Since you're hitting 96-97mph your car is definitely capable of a low 14sec pass, if you do everything right.

[.::F[L]Y::.]

yeh funny how most people on this forum think that with some mods they can expect to hit the strip and pull a good time first up....

just takes practice i suppose. some people are good and can do good times first up, some cant.

[EKNR33]

wicked type-r:

Try this:
-Have Half full or 1/4 tank of petrol(petrol is heavy) [weight reduction]
-Remove your spare tyre/tools/jack [weight reduction]
-Make sure you do a nice burnout to warm up the rubber [traction]
-Try lowering your tyre pressure throughout the night start at 30psi then drop it to 25psi don't go any lower then 20psi [traction]
-PRACTICE PRACTICE PRACTICE (makes perfect)

When funds permit invest in some decent rubber, (toyo t1r's for street rubber) or get some semi slicks/drag radials.

I have 224rwkw in my r33gts(rwd) running 225/50r16 wide toyo t1r's and i manage 2.0 60ft's that riding the clutch not dumping I DON"T hAVE TRACTION issues even with my power and no lsd.

Monitor your 60ft's for each 0.1 sec you shave off your 60ft you reduce your ET by 2x that so 0.2sec.

For Example in your case:
2.36 60ft @ 94mph 14.87ET
get a better 60ft:
2.20 60ft @ 94mph 14.55(estimated)
even better 60ft:
2.00 60ft @ 94mph 14.15(est)

You MPH(trap speed) shouldn't alter that much if you don't have any additional power, R/T(reaction time) doesn't affect your ET 1/4 mile times.

good luck! :)

my 2cents

[silver_screen]

well said champ ;)

[fatboyz39]

just keep practicing! you'll get ur 14.2 :thumbsup:

[bigjo5]

well maybe locate got 14.2 cause his car is a eg and is lighter?

[locote]

EG5 lighter than a DC2R????
last time i weigh it it was like 1080kg
On its own

[51REK]

well heres an example, i ran 13.92 @ 101mph on a hot day at willowbank wit a 2.103 60ft and on a cold night i ran a 13.73 @ 103mph wit a 2.05 60ft but i slid second gear, so it is possible that the temps and stuff could be affecting your times, however my car is turbo so that could be the difference (s13 ca18det mines chip sr20 turbo 13psi stock side mount cooler and thats it :( )

[fishman]

what you said doesn't look like it was affected by the temps. it was all your 60ft time. What on earth is slid 2nd gear? If you miss shifted times would have been much worse

[51REK]

Slid second gear i.e grabbed second gear and almost slid into the other lane, my car is set up for drift not drag lol. nah the temps allowed me to hold boost up top alot better hence the extra 2mph!

[BlitZ]

I have 224rwkw in my r33gts(rwd) running 225/50r16 wide toyo t1r's and i manage 2.0 60ft's that riding the clutch not dumping I DON"T hAVE TRACTION issues even with my power and no lsd.

my 2cents

what happen to your factory LSD?:confused: Most std modern rwd have factory LSDs...

[EKNR33]

Factory so called LSD in r33 is a 'viscous LSD' is far inferior to the type-r (proper) LSD... i do single wheel burn outs and you can visually see one wheel spin differently at wakefield lol.

i guess still good enough to run a 12.9 1/4 mile with 225 toyo t1r's :)

[silver_screen]

Viscous lsds are actually very very good. if urs is single spinning then the gel in ur diff musta leaked out ... ur diffs ****ed

Before drifting became big here, i was on the track. this is going back 5-6 yrs now.. with a viscous lsd.. standard 180sx diff... i never ever single spun.. EVER and that was makin 211rwkw :)

Most cars are viscous btw

[51REK]

My car has a nismo 2 way diff, and my tire pressures were at 35 psi, also my car weighs alot less then a r33...... thats why it slid......

[CoZZm0]

Definately sounds like the viscous coupling is dead, clutch type diffs are cheap enough these days anyways, best to upgrade. :-)

[black itr]

my stock-as-a-rock 99 itr ran 14.64 at wsid a couple of years ago.

technique: dump the clutch at like 5-6000 rpm and shift like crazy.

p.s the tires were basically bald and i made sure to stage behind guys running big v8's who were doing big burnouts.