drag racing tips

General discussions on all non technical car related topics

Moderator: The Mod Squad

Postby SkylineObsession » Mon Nov 23, 2009 5:09 pm

flygt4 wrote:there also not much point doing a big burnout on most street tyres, it will very rarely improve your 60ft times and some tyres grip levels do strange things when overheated.

Yeah, on two of my runs at the Alexandra drag racing a few months back in the GTS i did a wee skid each time and it did nothing to my times, they were slower if anything.
My quickest time was with no skid, while racing an 800hp+ Skyline GT-R (for the fun of it - he'd been finished for a second by the time i passed the halfway mark :p).

But yeah, it takes practice to get your launches right, and surfaces do vary. I was a second slower at Alexandra (on an airport runway) than i was in Dunedin (on a public road). Maybe timing systems vary too...
Last edited by SkylineObsession on Mon Nov 23, 2009 5:23 pm, edited 1 time in total.
User avatar
SkylineObsession
Toyspeed Member
 
Posts: 1772
Joined: Tue Mar 01, 2005 10:24 pm
Location: Dunedin

Postby Lith » Mon Nov 23, 2009 5:16 pm

SkylineObsession wrote:Yeah, on two of my runs at the Alexandra drag racing a few months back in the GTS i did a wee burnout each time and it did nothing to my times, they were slower if anything.
My quickest time was with no burnout, while racing an 800hp+ Skyline GT-R (for the fun of it - he'd been finished for a second by the time i passed the halfway mark :p).


Interestingly enough - on street tyres I definitely got slightly better times when I did burnouts, maybe JUST enough to get a bit of smoke off the tyres. Were you running standard tyre pressure when you did this? Burnout raises the pressure a bit, so make sure you are considering what the resultant pressure will be.

I tried my first meet using some sticky not-so-street tyres (and the necessary getting my head around burnouts and tyre pressures) at the most recent meet I raced at and got one of those "Hey wanna race?" from a dude driving an 800+hp GTR line ups and agreed for rofls sake and got spanked but managed to keep him within sight :)
http://www.youtube.com/watch?v=gFY_ATLRGu8

But yeah, it takes practice to get your launches right, and surfaces do vary. I was a second slower at Alexandra (on an airport runway) than i was in Dunedin (on a public road). Maybe timing systems vary too..


The timing systems definitely shouldn't vary, I've definitely found different days even on the same strip can get different results - hotter/colder track and day etc etc can all come into it. I've had
2007 Mazdaspeed Axela
User avatar
Lith
Toyspeed Member
 
Posts: 3137
Joined: Mon Dec 02, 2002 5:22 pm
Location: Kapiti

Postby pc » Mon Nov 23, 2009 5:18 pm

Crampy wrote:
ch4ng wrote:
pc wrote:keep lowing the pressure each run till the tyre turns on the rim then pump it up a little.

what do you mean by that?
i was launching at 3-3500, letting the clutch out quick but not dropping it, it would spin for one and a half seconds or so.

Don't listen to him. A proper street radial wont like running low pressures.
You'll actually end up with less footprint than if you ran higher pressure.
By all means drop it down a little bit, but not to the extent it looks like a Drag slick hahaha.

I assumed some type of semi slick, but yeah many road tyres can be a mixed bag, what tyre is being run?
red car
1/4 mile - 14.683s @ 91.83mph
Manfield - 1:24s
Taupo - Track1 1:53s (road tyres) - Track2 1:22s - Track3 48s (with esses) - Track4 1:58s
User avatar
pc
Toyspeed Member
 
Posts: 1749
Joined: Fri May 07, 2004 3:10 pm
Location: Upper Hutt Yo!

Postby SkylineObsession » Mon Nov 23, 2009 5:24 pm

Never did anything to the pressures or anything, and changed it from a burnout to a skid - never done/tried a burnout (staying in one place with the wheels spinning). :o

I've got vids of my runs, but they not online yet.
User avatar
SkylineObsession
Toyspeed Member
 
Posts: 1772
Joined: Tue Mar 01, 2005 10:24 pm
Location: Dunedin

Postby Lith » Mon Nov 23, 2009 5:29 pm

If you do it again sometime, try the tyres at around 18psi with a bit of a burnout :)
2007 Mazdaspeed Axela
User avatar
Lith
Toyspeed Member
 
Posts: 3137
Joined: Mon Dec 02, 2002 5:22 pm
Location: Kapiti

Postby ch4ng » Mon Nov 23, 2009 7:42 pm

currently have a set of "firenza st-08" which are a mid range street directional

definitely going racing again, it was so much fun! :D

lith: looks like you did alright :)
Chondah Civic
2T Navara
ex:
Charade Detomaso
MX5 - Stancemobile
MX5 turbo - El Tigre
87 Alto - The Tragic 3cyl powah
AE111 BZ-G Death Race 15.09

No Limits Onsite Paint Repairs. Cut and polishing, stone chip and scratch repairs. 021-177-8539 Mention Toyspeed.
User avatar
ch4ng
Toyspeed Member
 
Posts: 595
Joined: Sat Dec 27, 2008 7:28 pm
Location: Auckland

Postby pc » Mon Nov 23, 2009 10:02 pm

Try different tyre pressures and see how the 60's go, lower pressure will probably be better.
red car
1/4 mile - 14.683s @ 91.83mph
Manfield - 1:24s
Taupo - Track1 1:53s (road tyres) - Track2 1:22s - Track3 48s (with esses) - Track4 1:58s
User avatar
pc
Toyspeed Member
 
Posts: 1749
Joined: Fri May 07, 2004 3:10 pm
Location: Upper Hutt Yo!

Postby loose_unit » Mon Nov 23, 2009 11:55 pm

I always ran my street tyres at 18 psi and did a short 1st gear burnout. Going to a circuit type semi slick took .4 sec off my time straight away.
91 GT Starlet 5efte
231kw atw @ 18 psi
12.13 @ 185kph
loose_unit
Toyspeed Member
 
Posts: 339
Joined: Wed Nov 12, 2003 12:39 am
Location: Lower Hutt

Postby matt dunn » Tue Nov 24, 2009 12:22 am

I found I got almost a full second off my time between semi-slicks and road tyres.

Also found out the full circuit race slicks are about a second slower than road tyres as you just cant get them up to temp quick enough.
7AGTE - DX20VT - viewtopic.php?t=59733
Discussion - viewtopic.php?t=59751
matt dunn
Toyspeed Member
 
Posts: 7109
Joined: Fri Sep 12, 2003 1:01 am
Location: Timaru

Postby B_giB » Tue Nov 24, 2009 7:27 am

I have always found dropping pressures gives you slower times on street tyres, same with big burnouts, only need to do a small skid to get the stones and dust from the tyres.

I only did big burnouts in my AE86 because I could, I did them in my AE101 untill I murdered my superstrut bushes, but once again, that was for fun
Current: SXE10 Altezza

Previous:AE86 Trueno Notch Back: Gone but not forgotten :cry: :(
AE101 Levin 20V super strut
1994 Mercedes Benz C280 Sport
User avatar
B_giB
Toyspeed Member
 
Posts: 1058
Joined: Sat Sep 06, 2003 7:02 pm
Location: Albany, Auckland

Postby Loudtoy » Tue Nov 24, 2009 10:30 am

Imho i wouldn't bother getting semi's or other untill you haven't managed to decrease your et for a couple of meets and you've done everything else you can (thats cheaper than semis) to go quicker anyhow. I used to run 17psi in the tires in a relatively standard ae101 silvertop and managed to do alright, traps were never overly high but managed to get down to a 1.7 60 as my best which i thought was pretty reasonable for open diff and standard road tires with low psi.
Probably the best gain was from the intake i had, 2 runs same day, same safc in (was only to measure intake pressure wasn't actually fully wired in or controling anything) gave me atmosphere with head light in and 1.7psi with it out and was probably even higher when i'd finished playing with it.

Oh yeah better say that the car i had was Ae101 silvertop
Best was 14.7 at 93mph (materton), and backed up with numerous 14.8's at both meremere and masterton
Last edited by Loudtoy on Tue Nov 24, 2009 6:42 pm, edited 1 time in total.
TS Member sine 2001

Prado To tow stuff with
NZ Ae82 GT Liftback for gravel fun
Rodeo to do work stuff in
Big Ass Trailer to put stuff on
Car no 16 in a long line of less than ilustrious automobiles
User avatar
Loudtoy
Toyspeed Member
 
Posts: 1833
Joined: Tue Jun 04, 2002 9:26 pm
Location: In a ditch, watch for triangle!!

Postby MAGN1T » Tue Nov 24, 2009 11:57 am

I've never seen the point in doing burnouts with street tyres and a turbo. All it does is heatsoaks your intercooler. Maybe not an issue if you've got an oversize one.
Softer tyres means more drivetrain loss so even if you pick up a bit with the 60 foot you'll loose a bit with the MPH at the end.

Steve
Computers make you go mad.
MAGN1T
!USER HAS BEEN BANNED!
 
Posts: 646
Joined: Mon Jun 10, 2002 11:34 pm

Postby sergei » Tue Nov 24, 2009 12:02 pm

It was very funny when I was on the strip in my 165, the marshal (or official/christmas tree operator/santa/whoever he was) was telling to do burnout, but I was shaking my head, and he was looking at me like I was a wierdo.

Then people were giving me surprised looks, that my grubby 165 (that looks like some old shitty FWD celica) did low 13s, with 4 wheel spinning in second gear :).
User avatar
sergei
Mad Russian
 
Posts: 8406
Joined: Wed May 15, 2002 12:06 pm
Location: North Shore

Postby GTTpower » Tue Nov 24, 2009 12:27 pm

sergei wrote:It was very funny when I was on the strip in my 165, the marshal (or official/christmas tree operator/santa/whoever he was) was telling to do burnout, but I was shaking my head, and he was looking at me like I was a wierdo.

Haha im bound to get that when I eventually put the 85 down the strip.
1999 SXE10 Altezza RS200Z
2004 Honda SCV100
Previous: 1993 EP85 Starlet, 1984 KP60 Starlet
Steam/Origin ID: nzEP85
User avatar
GTTpower
Toyspeed Member
 
Posts: 1160
Joined: Wed May 02, 2007 8:47 am
Location: Hamilton

Postby Quirky » Tue Nov 24, 2009 12:51 pm

MAGN1T wrote:I've never seen the point in doing burnouts with street tyres and a turbo. All it does is heatsoaks your intercooler. Maybe not an issue if you've got an oversize one.
Softer tyres means more drivetrain loss so even if you pick up a bit with the 60 foot you'll loose a bit with the MPH at the end.

Steve


When your driving around the pitstop, theres dirt, mud and grass.
Best to do a very quick spin of the tyres to free them loose.
Hello There
Quirky
Toyspeed Member
 
Posts: 482
Joined: Tue Sep 19, 2006 5:48 pm
Location: Townsville, Australia

Postby THA SHZ » Tue Nov 24, 2009 3:35 pm

loose_unit wrote:I always ran my street tyres at 18 psi and did a short 1st gear burnout. Going to a circuit type semi slick took .4 sec off my time straight away.

yes but that wont help him if hes doing NIGHTSPEED , as its too dam cold and moist 8)
Im the Daddy of the Mack Daddys ! :-)

http://toyspeed.blakjak.net/profiles/photos/861.jpg
User avatar
THA SHZ
Toyspeed Member
 
Posts: 2015
Joined: Wed May 12, 2004 5:48 pm
Location: Westside

Postby holden_fan2005 » Tue Nov 24, 2009 5:32 pm

Quirky wrote:
MAGN1T wrote:I've never seen the point in doing burnouts with street tyres and a turbo. All it does is heatsoaks your intercooler. Maybe not an issue if you've got an oversize one.
Softer tyres means more drivetrain loss so even if you pick up a bit with the 60 foot you'll loose a bit with the MPH at the end.

Steve


When your driving around the pitstop, theres dirt, mud and grass.
Best to do a very quick spin of the tyres to free them loose.


I agree. It saves putting shit all over the track for other people too :)
holden_fan2005
Toyspeed Member
 
Posts: 560
Joined: Thu Nov 29, 2007 12:33 pm
Location: Welly

Postby Lith » Tue Nov 24, 2009 6:00 pm

MAGN1T wrote:I've never seen the point in doing burnouts with street tyres and a turbo. All it does is heatsoaks your intercooler. Maybe not an issue if you've got an oversize one.
Softer tyres means more drivetrain loss so even if you pick up a bit with the 60 foot you'll loose a bit with the MPH at the end.


Come on man, you've been around drag racing long enough (racing for far longer than me, seeing your car at Wineera drive is part of got me into imports!!!) to know the race can be won or lost in the 60ft - as much as I love a good mph, losing one or two to knock off a couple of tenths is a worthwhile compromise :)

I've definitely run quicker 1/4 miles with a little burnout at the start. What I (and I assume Looseunit) are referring to are essentially launching out of the water trap with far too many revs and not feathering the throttle - drying the tyres off, getting any crap stuck to them off and maybe warming them up slightly.

I avoid statics..... I might stay put for a couple of moments on drag tyres but thats just to get them spinning, then edge the car out of the water trap and make sure that I am spinning them on a dry clean surface. Statics in the watertrap are a trap for young players ;)
2007 Mazdaspeed Axela
User avatar
Lith
Toyspeed Member
 
Posts: 3137
Joined: Mon Dec 02, 2002 5:22 pm
Location: Kapiti

Postby ch4ng » Tue Nov 24, 2009 6:54 pm

hmmm i just realized that my front tyres where in the water where the marshal/santa/whatever stopped me, will remember to move out of there next time.

once i get fxgtrace's semislicks ill experiment with doing a burnout and not.
but at the end of the day i think i will end up doing a burnout

BZG|Bling wrote:How else are you supposed to impress the honeyz if your cars slow?
:lol:
Chondah Civic
2T Navara
ex:
Charade Detomaso
MX5 - Stancemobile
MX5 turbo - El Tigre
87 Alto - The Tragic 3cyl powah
AE111 BZ-G Death Race 15.09

No Limits Onsite Paint Repairs. Cut and polishing, stone chip and scratch repairs. 021-177-8539 Mention Toyspeed.
User avatar
ch4ng
Toyspeed Member
 
Posts: 595
Joined: Sat Dec 27, 2008 7:28 pm
Location: Auckland

Previous

Return to General Car Discussion

Who is online

Users browsing this forum: No registered users and 25 guests