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tqhq.ee foorum : Vaba teema : How to drag race  
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peep
 
Moderator
How to drag race
Mõned näpunäited ja päris head minu meelest. Kõik ei ole muidugi meie oludes vajalik - seda aega kus siiakanti esimene drag-race tree tekib annab kahjuks veel oodata.
Sry, et ingl. k., ei viitsinud tõlkida:)

quote:
Getting the car ready...

First, empty the car of all the un-necessary items you have been storing in the trunk. Added weight is your enemy. You will probably only burn 2 or 3 gallons of fuel at the track. Unless you feel you need the extra balast of a full tank of fuel (for traction or the trip back home) try to arrive with less than a 1/2 tank of gas. Check all the vitals (oil, trans fluid, brake fluid, battery electrolite level, radiator,, everything) and bring them to the proper level.

Get to the track early. Give the car plenty time to cool off. Underhood temps can make a HUGE difference in ET, you don't want to abuse you motor when stone cold,, but you don't want the residual heat from it just coming off the express way either. I assume you have gone over all the safety items and will get past tech, if not you might want to review this page as it has some of the more common tech items listed

sears point raceway tech

Ok, assuming you got through tech...

First things first. Go up into the stands and familarize your self with the track, you want to get a perspective of every interval from the waterbox through the turnout roads. Pay close attention to where the starting line is (staging beams) and the finish line. Don't laugh,, I've watched a number of inexperienced racers that didn't know when to let off and slow down. You might ask tech if the scales are open. This is a perfect opprotunity to find pout what the car weighs with driver and fuel on board,,, ready to race.

Time to get into the staging lanes...

Always listen to the announcer, they will give any special instructions for that particular track / event and tell you which lane has right of way at the top end of the track. More on that later.

The announcer will say which lanes are for street tires, for slicks, for pro tree, full tree, test and tune of the pro cars, etc.,, pay attention and ask questions if you need to. You will find most everyone at the track is very helpfull if you just ask. It's when you don't ask and do something dumb that you get into trouble.

Don't play monkey see monkey do and drop the air pressure in your rear tires to a rediculous psi. Most street tires will cup in the center at low psi and give less traction than when normally inflated. Besides, too low of a psi will very likely get you in trouble with control. Obviously Drag radials and DOT 'cheater' slicks are designed for a low psi, but NOT your street tires. Your front tires should be checked and brought to proper inflation,, it will help reaction times if you bring them up a few psi higher than normal. But don't go krazy and don't exceed the MAX inflation listed on the tire.

In the staging lanes try to keep the motor off as much as possible. You don't want to build unnecessary underhood heat. When you are the 2nd or 3rd car in line, put your seat belt on and start the car and let it warm up. I bring my car to the water box with a water temp <150 degrees, but that's just where I get the best performance. Just look at what temp your car is at when the lane director sends you out. You want to remember this and write the water temp on the back of the time slip for future reference. (if you plan to go to the track much at all there is no limit to how much info you record on your time slip,, every detail is helpfull to find better performance)

Your ready, the lane director sends you out...

DRIVE AROUND THE WATER DO NOT drive through the damn water. Your street tires up front will drag water to the starting line and you will just blow the rear tires off in wheel spin,, as will every car behind you. I can't stress this enough. Street tires are designed to disperse water, that water goes up into the tread and get's carried to the starting line,,, both front and rear. Drive around the water and back up to the moist pavement just in front of the area they are wetting down. Put the car in low gear and wait for the race director / starter to signal you to do your burnout and stage. Here again,,, your street tires will NOT benifit from a huge, long, smokey John Force burnout. Just spin them enough to clean them off (count 1,, 2,, 3 in your mind) and let off the brake until the car starts to roll out. GET GENTLY ON THE BRAKES AND STOP WELL BEFORE THE STAGING BEAMS. Now if you want to look like a rookie,, roll through the staging beams with your front tires and attempt to stage with your rear tires. The race starter, the crowd and everybody will be laughing their ass off. (Now you know why I said to familarize yourself with the track from the stands). After your burn out, roll gently up to the box that holds the staging beams. Don't doddle, just get your butt up there and turn on that top bulb. As you get close CREAP that last 4 or 5 feet. No gas, just ease up till your "pre stage" comes on.

Ready to race...

DO NOT roll in and turn on the second stage bulb until the other lane has lit his top bulb. This is a courtesy amongst racers and you will be better received if you follow it. While you are waiting for the other lane,,, this is time to clear your head and get ready to race. Don't roll in and go to full stage if you are not ready. As soon as you are full staged that is the singal to the starter you are ready to race. If your arent,, shame on you. Again CREAP forward ever so slightly (only 7" between pre-stage and full staged) till you turn on the second stage bulb. Now it's just you, the tree and the track. Focus on the third yellow bulb. Pay no attention to anything but that third yellow. (or the starter if he waves you off) I've written a lot here to get to what Pat has already mentioned, but his words are ever so wise. As SOON as that third yellow glows,, off the brake and go wide open.

On a pass....

Time to use your head and driving skills. If the car spins hard, you have to make the decision if you are going to east out of the throttle some or drive through it. ABOVE ALL ELSE if you start to get in trouble, drift out towards the centerline or the wall, ease out of the throttle and gently get on the brakes. An aborted pass is a safe pass, a reckless pass will get you tossed off the track. No one laughs at anyone who lifts and races another day. Should something go wrong and you feel something in the drive train let go,, again lift and get on the brakes. As soon as you have slowed to a controlable speed get out of the groove. Pull as far to the side of the track as you can (up close to the wall) and get stoped as quickly as you can. The track officials and all other racers will thank you for making the cleanup as brief as possible. I doube you will have a problem,, just wanted to let you know what to do 'in case'.

The finish line and shutdown...

Most tracks are clearly marked at the finish line,, and the two cones in the center of the track that time the car for a MPH are the clue. Again you know this because you famalirized your self with the track before you ever got in the staging lanes,, right!
As you cross the finish line,, don't snap the throttle shut and jam on the brakes. The SBC rods are tough dudes, but they are designed to take pressure from above,,, when you go from power to decell is when they are most vulnerable. As you cross the finish line list out of the throttle with a steady motion, not a snap. Then ease into the brakes. Most tracks have AMPLE runout room and numerous turnouts. Bringing our car down from trap MPH is to be done SAFELY,, that's why they give you all that room.

Getting off the track...

EXTREAMLY IMPORTANT! NEVER just turn across an adjoining lane. Always let the lane with the turn out roads have the right of way,,, even if you are WAY ahead. He could have had a problem at the starting line and be bearing down on you at 130MPH. KNOW where you opponent is and what he is doing before you ever turn across his lane. It's best to slow down and let him pass you and follow him off the track if the turnout is on his side. Likewise if the turnouts are on your side of the track, Never assume the idiot in the other lane is going to give you the right of way. As you approach the turnouts be cautious ,,, you never know if the other lane has been paying attention.

Got a time slip...

Time to do some data logging. As I said earlier, there is no end to the usefull info you can jot down on the back of your time slip. Just a few things to keep track of,,,
Engine temp at the water box
Engine temp at the pre-stage bulb
Engine temp at the end of the pass
Trans temp (same intervals)
Length of burnout (1,2,3 count etc)
Tire pressure (front and rear)
Shock settings
Air cleaner on or off
Jet's in the carb (primary / secondary/ powervalve)
Ignition timing
mufflers on / off
Launch rpm
Shift rpm
rpm at the end of the pass
(and one of the things you will find EVERY serious racer tracking,,, enviornmental)
Air temp
humidity
barrometric pressure
corrected altitude
wind (head wind, tail wind etc)

If you track every detail of the pass and track results with any change,, the trends of what your car likes and dislikes will come to light real quick.
18.04.2001 at 10:53
rustang
  
Moderator
How to drag race
Minusugusele igati abiks jutt!

Kysimus ka: Pärnus niikuinii mingit veetõket ei ole. Kas on mõtet võtta veepudel kaasa ja enne burnouti ratta alla kallata või ajada lihtsalt ratas enne starti veidi ringi niisama, kuivalt?
18.04.2001 at 16:53
newton
 
Moderator
How to drag race
Tänavaketsiga küll ei tasu vist, pillub selle vee veel koopasse ja siis pärast tilgub ratta pälle :( Lihtsalt sodist puhtaks korra ketsid ringi lasta.
18.04.2001 at 16:57
peep
 
Moderator
How to drag race
quote:
newton wrote:
Lihtsalt sodist puhtaks korra ketsid ringi lasta.
18.04.2001 at 17:29
rustang
  
Moderator
How to drag race
Mingid mõtted veel: Kas asi toimub ka märja ilmaga või on see liiga ohtlik? Kas tasub mingid vihmakumme meenutavad asjad igaks juhuks kaasa tirida?
18.04.2001 at 17:43
peep
 
Moderator
How to drag race
Tavaliselt ei toimu sellised üritused märja ilmaga aga see konkreetne Pärnu võistlus võib toimuda küll.

Mis mõttes vihmakummid, kas nagu F1's ???
18.04.2001 at 17:49
rustang
  
Moderator
How to drag race
quote:
peep wrote:
Mis mõttes vihmakummid, kas nagu F1's ???

Nomaitea, näiteks sellised mustriga kummid versus praktiliselt kiilakaks kulunud kummid.
18.04.2001 at 17:56
peep
 
Moderator
How to drag race
Muidu ka soovitan mustriga kumme, kulunud tänavasõidukumm peab halvemini kui mittekulunud kumm. Miks ma täpselt ei oska öelda, ilmselt rehvi materjali omadused muutuvad vananedes sedavõrd palju halvemaks.
18.04.2001 at 18:11
LaSa
 
Moderator
How to drag race
aeg + temp ?
19.04.2001 at 09:35
rustang
  
Moderator
How to drag race
quote:
peep wrote:
Muidu ka soovitan mustriga kumme, kulunud tänavasõidukumm peab halvemini kui mittekulunud kumm. Miks ma täpselt ei oska öelda, ilmselt rehvi materjali omadused muutuvad vananedes sedavõrd palju halvemaks.

Nujah, eks see esimene kord läheb katsetamise peale. Uusi kumme mul alla panna kyll ei ole, eile käisin Haapsalus ja kuna aega yle jäi, siis tegin lennuväljal natuke trenni, praegused Michelini Pilot pastlad kulusid kyll sellise tempoga, et....

Suht normaalne tundus nii, et 2500 rpm pealt sidur üles ja samaaegselt gaasi, siis sai mitte väga palju kummi maha jättes minema.

Sai ka topspeedi proov tehtud, spido lõppeb kyll 85 mph juures ära aga tahhoka järgi arvutades tuli miski 210 erilise vaevata. Pidurid on sellise kiiruse pealt 0 saamiseks väga nirud, tagumised trumlid sai suitsema ja pedaali pehmeks :(
Kui tahta ringrada sõita, tuleks taha vist kettad hankida.
20.04.2001 at 09:55
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