Author Topic: Dumb burnout question  (Read 5024 times)

Offline shadango

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Dumb burnout question
« on: September 18, 2011 - 08:28:10 PM »
Wasnt sure if this is a (dumb) tech question I should put elsewhere, but seems to fit here too, so here goes....a dumb question about burnouts...a question that comes after wathcing numerous nurnout videos here and some live ones today at a car show...

So in a burnout you tromp the gas while holding the brakes on as hard as you can....I love watching them....have tried it with my car a couple times and have done some short ones....but chicken out and let off the brakes...LOL

Why is it that the rear wheels can over take the braking power?  Isnt it really bad for the brake linings/brake hardware/tranny/driveline etc?

I could understand something like a line lock.....that would lock the front brakes solid and leave the rears free....but isnt fighting the braking power of the rear end really hard on...everything??   :clueless: 





Offline the_engineers

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Re: Dumb burnout question
« Reply #1 on: September 18, 2011 - 10:49:33 PM »
A linelock makes things a lot easier, but the biggest component in a great burnout is sufficient power to overcome any available traction, aided either by wet surface or crappy tires.

My burnout shot in the calendar this year was aided with iffy tires.
Brooks

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Offline Super Blue 72

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Re: Dumb burnout question
« Reply #2 on: September 18, 2011 - 11:36:46 PM »
One thing to keep in mind is that if the rear brake shoes aren't adjusted properly (ie- not adjusted to close to the drum), it'll make it easier for the rear tires to spin.  The majority of the brake work is done by the front brakes, which aren't fighting against the rotational force of the rear axle.  One would worry about breaking something, which in theory could happen.
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Offline HP2

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Re: Dumb burnout question
« Reply #3 on: September 19, 2011 - 09:13:23 AM »
Sure, it isn't great for rear linings, but we're car guys, so we're always tearing things apart and inspecting them on a regular basis anyway, so you just swap them out sooner. With big torque motors, over powering the brake capability of the rear drums is actually not that hard to do.

Actually, I've never stood on the brakes as hard as I can. I only use them as much as required. You can unload the rears slightly to assist with the break away. Pump up the brakes, strat rollinging in to the throttle, then right before the tires break free, ease up on the brakes and then everything starts spinning.

Once your spinning, then you want to ease out of the burnout the same way by easing up off the brakes while easing out of the throttle and letting the car slowly move forward until it catches up to the tire speed. You never want to snap the throttle shut on a mopar with an auto trans, hot tires, and good traction, like at the strip. The overrunning clutch can do bad things internally at those types of rotational speeds.

Offline Super Blue 72

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Re: Dumb burnout question
« Reply #4 on: September 19, 2011 - 09:39:14 AM »
Sure, it isn't great for rear linings, but we're car guys, so we're always tearing things apart and inspecting them on a regular basis anyway, so you just swap them out sooner

HP2, I love your way of thinking!  :roflsmiley:  :thumbsup:

Oh yeah, burnouts bring back a word of warning from my teens:  Watch what's behind you! .  My first burnout I did in my '67 cutlass with snow tires when I was 13.  My Mom didn't appreciate her flower garden covered in rubber!   Couldn't even see into the neighbors yard! 

For that car I had mickey rigged an extra washer fluid bottle and ran  a line down to the passenger rear tire and had a button set up to squirt the rear tire when I wanted to do a burnout to ease into the burnout on dry pavement.  It only had a little 330ci 2 barrel engine, needed some help!

Pull some tires off the free section of craigslist and have a ball!  :woohoo:
1972 Dodge Challenger Rallye 340, AT, Code TB3=Super Blue, SBD=8/17/1971.  Yes, a Rallye without the fender louvers from the factory because of the body side molding option.

Pic #2 and 3 of my ARII 1/24 scale model car 

Phil in New England-Massachusetts  Always thank God for what you have!

http://www.cardomain.com/ride/456046/1972-dodge-challenger

Offline GranCuda1970

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Re: Dumb burnout question
« Reply #5 on: September 19, 2011 - 09:48:49 AM »
Definately watch behind you and the ground you are doing it on. I saw a fellow veteran showing off his new built trans AM in a on-Post parking lot pull a burnout on pavement that had small gravel speckled all around. The High powered burnout launched those tiny rocks into the cars behind his burnout show and broke glass and caused many dents on other vets cars that were parked behind him.

Offline Super Blue 72

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Re: Dumb burnout question
« Reply #6 on: September 19, 2011 - 10:02:02 AM »
Also, make sure it's not on someone elses property!!!

I was 15 and my brother had just gotten his license and we were bored at Aunty Dorothy's house so went for a ride.  Decided to "test drive" a car, a '67 Firebird with a 326, glass packs, Candy Apple red metal flake paint (That paint added 5hp!) and 50 series tires on slotted rims.  This was in the era of the Mad Max movie so we were pretty pumped to drive this car.  (It was cooler than the '74 Chrysler Town and Country wagon we drove up in.)

We wanted to test out the car to see if it has Posi (Sure Grip for the Mopar crowd.)  We pulled over on a shoulder (Or so we thought...)  I stood behind the car like 20 feet back and my brother nailed it, sprayed dirt all over me.  We drove it on to the road, did a 0-60mph time on the car, U-turned, went back to the shoulder and was sitting there revving the engine chanting , "Mad Max, Mad Max, .... then a guy with a shot gun comes running down the driveway at us!!!  We high tailed it back to the used car dealer, dropped off the keys then very slowly drove back to Aunty Dorothy's house.....  :icon16:

Too bad for that guy, there was a '68 Camaro there I wanted to "test out" too!  :crazy:
1972 Dodge Challenger Rallye 340, AT, Code TB3=Super Blue, SBD=8/17/1971.  Yes, a Rallye without the fender louvers from the factory because of the body side molding option.

Pic #2 and 3 of my ARII 1/24 scale model car 

Phil in New England-Massachusetts  Always thank God for what you have!

http://www.cardomain.com/ride/456046/1972-dodge-challenger

Offline joelson6

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Re: Dumb burnout question
« Reply #7 on: October 05, 2011 - 09:45:41 PM »
i set the back drums a little loose.

all my burnout cars are/were 4 speeds. it's a little more tricky doing a burnout with a stick......... and no line locks.

dump the clutch around 3000rpm, quickly step on the brake and into the throttle at the same time.

with the back drums set loose, it won't grab the drums too tight and it's easier to spin the wheels.

ease off the brake as you want the car to move forward. when you want the back brakes to kick in, double pump the pedal.

Offline mopar12372

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Re: Dumb burnout question
« Reply #8 on: October 05, 2011 - 11:18:08 PM »
when i burn out with a clutch i slip the clutch a lttle and add more throttle sllowly bring  out the clutch . you have do do it with faness so the clutch dosent burn up . back of on the throttle slightly to controll rpm. let the tires go up in smoke . easier on the drive line
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Offline guvnuh

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Re: Dumb burnout question
« Reply #9 on: November 09, 2011 - 05:28:01 PM »
Be mindful if you're doing this on a public street - in some states (such as Arizona) a burnout is labeled "exhibition of acceleration" and is an arrestable offense.  In other words - look both ways AND BEHIND YOU for the Five-O!

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Offline KellysCuda aircard

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Re: Dumb burnout question
« Reply #10 on: November 09, 2011 - 06:07:09 PM »
A line loc sure makes things easier on the rest of the car....minus the tires