Burnout, Black Lines Matter?

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Kent mosby

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Testing out the setup on the back roads may not be the best for strip comparisons, but,,,.
When my buddy punched the scamp 512 ci on the back roads we would drift to the left every time. Maybe 100 feet of black lines shifting into the next lane. First, is this an issue? Second, What factors need to be evaluated? Alignment, tire pressure, Body setup etc.??? The roads were not very grippy. Also, We were moving along about 35-40 and he dropped the throttle and broke the tires loose, to give you some perspective about the traction.

These were all from about 5 mph and we broke loose just for the fun of it.

Is this normal?
 
Could be anything up to and including the road crown. No real way to tell until you get it on a machine and even then if you get it perfect, it may still do it. The fact is when the tires are spinning,they're getting zero traction and are proned to do whatever they want to.
 
One of you needs to diet, until things even out a little. :poke:

Could be tire pressure, could be biased rear leafs too, as well as a worn one. Or any other factor already mentioned.
 
Back end is trying to pass the front, any way it can.

Gravity and Road Crown determins the direction left or right.

Being you are saying it is swinging left, (which I would think it would be swinging right if it were from road crown).

Here is a thought:
I know you have a Sure-grip but as compared to an open diff (one wheel wonder) when you give it the go the right rear wheel lifts from the rotational torque of the drive line, and it will smoke that right tire because it has less weight on it and the left tire is still planted firm.

So follow along: with the right tire slightly lifting with your Sure-grip the tire diameter increases by maybe 1/2". Then with the weight transfer to the back of the car from the acceleration it is planting the load on to the left tire, actually decreasing it's diameter.

Add up the 2 differences of the 2 tires under power, and it is naturally going to want to go left.

They sell the Super Stock springs that are rated left and right. (they give a very stiff ride so be warned) The left spring has a little more arch to it (or is slightly stiffer) to help preload the right rear tire to help offset the driveline rotational force.

Also there are what is called the "Big Block" short lower leaf spring that helps the rear end from wrapping up. They are different lengths from left to right to also help offset the twisting/lifting forces under acceleration.
 
E7726ADB-37F4-4A81-83B1-FB55AF241F5F.jpeg


My “Test” spot. Sometimes straight, sometimes a little back and forth action but always fun.

Cliff Ramsdell
 
My 'test spot is over here
<------

Could this turn out to be a 'burn out' thread for us Burn Outs ?
Someone else (not me) is having a crown/traction issue ;)


 
I think this is the video, it should talk about at some point how the rear suspension works and how people used to combat the "twist" that george jets spoke about earlier.
If not, then I will find the correct video later.


EDIT:
I found the right video talking about how suspension loads up with torque.
Starts at 12:47
 
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Do you have pictures of the marks? They tell a thousand words. I wouldnt think the *** end would try to pass on the left if this is a two lane country road with a crown.
 
clementine said:
Do you have pictures of the marks? They tell a thousand words. I wouldnt think the *** end would try to pass on the left if this is a two lane country road with a crown.
Click to expand...
For sure, that would be illegal.......:D
 
Kent mosby said:
Testing out the setup on the back roads may not be the best for strip comparisons, but,,,.
When my buddy punched the scamp 512 ci on the back roads we would drift to the left every time. Maybe 100 feet of black lines shifting into the next lane. First, is this an issue?
Click to expand...


Well, considering traffic could be coming from the other way, traveling in thier proper lane and you're sliding out of controll across the center line, yeah, that could become an issue
 
diymirage said:
Well, considering traffic could be coming from the other way, traveling in thier proper lane and you're sliding out of controll across the center line, yeah, that could become an issue
Click to expand...

I've done that, luckily it came back at the right time and I just kept going as nothing happened. The other guy probably had to clean out his shorts. LOL
 
diymirage said:
Well, considering traffic could be coming from the other way, traveling in thier proper lane and you're sliding out of controll across the center line, yeah, that could become an issue
Click to expand...
I can see for 1/2 mile on a straight road. Out of control may be exaggerating a bit. I don't think our front or rear wheels entered the opposite lane. Just drifted a bit
 
Kent mosby said:
I can see for 1/2 mile on a straight road. Out of control may be exaggerating a bit. I don't think our front or rear wheels entered the opposite lane. Just drifted a bit
Click to expand...
I have been told by a cop...and I qoute "son, when you are going sideways, you are not in controll of your vehicle, and I was behind you...you were S I D E W A Y S"

It's kinda like popping a wheelie on a bike
Yes, it takes knowing your vehicle to do it, and it takes a little bit of skill to keep it going BUT in the eyes of the law, you are not in controll
And if something happens, they will use that to hang you
 
I've been slapped around here too for mentioning drifting. So I don't mention it any more. I get what yur saying but If I had a Barracuda with a propensity to drift, I would drift it wherever; and have the tickets to prove it.
But I started driving the crap out of Mom's car in 1969, trying to get it to corner on two same-side wheels. So drifting is no big thing.
But mine would go where I point it. And when I would point it in a different direction, it would go in that direction. And if I was to press on the brake pedal, it would stop. And if I had a passenger that looked about ready to puke, I would just step on the clutch and let everything stop.
But my wife says at my age, it's time to quit doing those things.

I can't say why your car is going sideways, I only have a 367. If I had to guess, I'd say; try unplugging a few plugwires.
lol
 
Kent mosby said:
Testing out the setup on the back roads may not be the best for strip comparisons, but,,,.
When my buddy punched the scamp 512 ci on the back roads we would drift to the left every time. Maybe 100 feet of black lines shifting into the next lane. First, is this an issue? Second, What factors need to be evaluated? Alignment, tire pressure, Body setup etc.??? The roads were not very grippy. Also, We were moving along about 35-40 and he dropped the throttle and broke the tires loose, to give you some perspective about the traction.

These were all from about 5 mph and we broke loose just for the fun of it.

Is this normal?
Click to expand...
I want a white T-shirt with the Thread title on it.
 
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