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Why 1/8th mile?

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Category: Competition
Forum Name: Drag Racing
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URL: https://theamcforum.com/forum/forum_posts.asp?TID=110151
Printed Date: Apr/15/2024 at 11:23pm
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Topic: Why 1/8th mile?
Posted By: Dan390
Subject: Why 1/8th mile?
Date Posted: Apr/05/2021 at 11:16pm
Ok, I'm no drag racing expert...but WHY did 1/8 mile drag racing ever become a thing, and why do people like it? Not to offend anyone, clearly it's popular. I just never have heard why this got started.

I guess for me it's like if we started playing baseball with only 1st and 2nd base...what's the point, and that's not "baseball", I guess is the best analogy I can come up with.

Wasn't 1/4 mile short enough? I also heard even 1/4 mile racing is less than an actual 1/4 mile these days too, if true, what is the logic behind these shorter tracks?



Replies:
Posted By: mixed up
Date Posted: Apr/06/2021 at 12:32am
as quarter mile speeds increased the smaller tracks went to 1/8 mile so they had time to slow down and insurance liability on track owners

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69 amx 290 auto
65 220 290 4spd
80 ford fairmont


Posted By: TX390AMX
Date Posted: Apr/06/2021 at 1:00am
As Top Fuel & Funny Car speeds increased to well over 300 MPH in the 1/4, most NHRA sanctioned events limit these classes to 1000' instead of 1320. A couple years ago at O'reilly Raceway Park, outside Indianapolis, the Top Fuel cars were still going 320 in 1000' in the low 3 second range. Got to keep your camera on a swivel to catch any of that. IDK about the 1/8 mile except for the Street Outlaws. Some of the Pro-Mod street outlaw cars are running over 160 in the 1/8 mile. Easier to find 660 feet of racing surface with shutdown area than 1320 feet with additional shutdown.


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Terry
68 AMX 390 4 Sp Rally Green
68 AMX 390 4 Sp Matador Red
68 AMX 390 4 Sp Calcutta   
   Russet
56 Chevy Sedan Delivery
2016 Can AM Spyder
55 Chev pickup


Posted By: WesternRed
Date Posted: Apr/06/2021 at 8:42am
Most of the driving action happens in the first 1/8th mile anyway.

We have a few 1/8th mile events for cars that are too quick to run 1/4 mile due to lack of safety gear. 


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I've finally given up drinking for good...........now I only drink for evil.


Posted By: Ken_Parkman
Date Posted: Apr/06/2021 at 2:14pm
I still prefer and relate to 1/4 mile, but the way seems to be 1/8 and there is some logic. Watched the progression of the outlaw cars and the power progression has been so impressive that the heavier weight break cars were getting simply absurd. The inertia in a 3500 lb car at 235 mph is simply unsafe if something is to go wrong.
 
So it all trickles down.


Posted By: Softbuster
Date Posted: Apr/06/2021 at 6:23pm
There is a guy that built a Awd 400 hp  late 80s Cutlass because his buddy was beating him with an Eagle Talon Awd.     

That being said there is a difference in racing 1/8th mile vs 1/4 mile, The big block cars shine in the 1/4 mile vs a smaller car with a quick small block.   A lot of variables to discuss... Does bench racing happen in the garage or the Lounge? Haha


Posted By: tyrodtom
Date Posted: Apr/06/2021 at 9:22pm
Back in the early 60's one of the local small airports was converted into a 1/4th mile dragstrip.
They closed in about 10 years later when too many cars couldn't stop and went into the housing area.  

In the early 80's they opened it again as a 1/8 mile track, didn't last 10 years that time for the same reason.

One of the other tracks in KY went through the same evolution for the same reasons,   is down to 1/10th mile, maybe even less now.  But at least it's still open.

Cars get faster,  they need more room to stop.
But land prices go up,  even if you have the option of extending the stopping area.
Unless a engine blows,  the race is usually decided in the first 100 feet or so anyway.


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66 American SW, 66 American 2dr, 82 J10, 70 Hornet, Pound, Va.


Posted By: Dan390
Date Posted: Apr/06/2021 at 9:34pm
Thanks, great feedback. I had suspected that more tracks could open if they were shorter, and in my mind there never is enough local dragstrips!

I personally don't much care for pro drag racing since it's nearly identical cars winning by nan0seconds of each other unless one had a breakdown or driver error, frankly it's boring even though the cars are amazing.

That was one thing I like about local 1/4 mile tracks, often if a guy blew it at the line or had a slow launch car, he could often reel the other guy back in right at the end and makes for fantastic racing.

Plus you kinda have to build a car that has low end launch but long legs at the other end for 1/4 mile, 1/8 mile to me seems more like just a one trick pony motor.

I have to admit though that 1/8 racing the spectators can actually see the end of the race, 1/4 mile can be hard to visually judge who won until the boards light up.

In the end, anything that keeps it alive. With the changes coming to cars and environment etc. in the next 20 years it may get harder and harder to keep it alive. Chrome is a good example...who ever thought it would be hard to get car parts chromed? That's fast becoming obsolete.



Posted By: amxdreamer
Date Posted: Apr/06/2021 at 10:10pm
The outlaw and small tire cars are so much fun to watch in the 1/8 mile. 150+ mph in an 1/8 mile on a 275 radial is amazing!



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Tony
Vancouver, BC
1970 AMX
1972 Badassador
AMO#10333


Posted By: mixed up
Date Posted: Apr/06/2021 at 11:49pm
1/8 mile also save on wear and tear of the cars

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69 amx 290 auto
65 220 290 4spd
80 ford fairmont


Posted By: matty 401
Date Posted: Apr/07/2021 at 8:11am
i agree on the lack of room  our local track is 1/8 

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72 matador 401 the beast
79 concord 2 door
72 matador 304 grasshopper
68 Rogue 406
93 Cherokee 4.0 5 speed



Posted By: Steve_P
Date Posted: Apr/07/2021 at 2:19pm
Summed up already, but probably almost all tracks were 1/4 mile in the 60s.  And they had enough braking space at the end to stop a car at that time.  As the cars got faster, there wasn't enough room to stop, and adding more asphalt isn't always feasible.  And even if it was, insurance is surely more expensive for the track owner with 1/4 vs 1/8. 


Posted By: ajzamc360
Date Posted: Apr/10/2021 at 9:07am
Just throwing my 2 cents in here. 
Take it with a grain of salt. 
Im partial to either. 
Quarter mile is fun, and easier in my opinion. You have more time to react to that horrible light you cut or have time to cover your hind quarters on the big end. 
1/8 is a bit more of challenge. Less time to judge if your going to catch up, more to be on your game. 



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-Broke 'N' $till $pendin' Racing


Posted By: PROSTOCKTOM
Date Posted: Jun/22/2021 at 6:36am
I honestly think 1/8 mile tracks are more popular do to land constraints. owning an extra, or sometimes unavailable 30%-40% more land is not possible. Also the average car bracket car only gains another 600-700 rpms between 660 ft. to 1320 ft, so you have the engine running at high rpms longer, so 1/4 mile racing entails a lot more wear and tear on parts. I am fortunate to live in an area that has an abundance of 1/8 and 1/4 mile tracks available, so the choice is what track do I want to visit this weekend. The way things are in the World today I think what really matters is that there is some length of track available to race at be thankful you have it.

Tom


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Molnar Technologies Full Service Dealer - Crankshafts & Connecting Rods

1969 AMC Rambler Rouge Race Car
1974 AMC Hornet Hatchback, Wally Booth Outlaw Nostalgic Pro Stock Race Car Project


Posted By: WesternRed
Date Posted: Jun/22/2021 at 7:31am
Looking at my time slips it's 93 mph at 1/8th and 116 mph at the end of the 1/4 mile, a good or bad run is pretty much set by the end of the 1/8th if not earlier and after that all you are doing is winding it out in top gear. My local track is 1/4 mile and the closest track after that is about 2,500 miles away so we don't get much option. 

They do a bit of roll racing at the local road race circuit, which I haven't had a go at yet. Not sure if you guys have that, but basically 1/8th mile heads up racing with a rolling start.


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I've finally given up drinking for good...........now I only drink for evil.


Posted By: S Curry
Date Posted: Jun/22/2021 at 8:08am
The strip located near me has been around since 65-66. Started as a 1/4. Shut down maybe a thousand feet and then cornfield. By the late sixties the owner was bringing in Fuel Dragsters from out west and they were winding up in the cornfield. So much that, he just gave the farmer some compensation...not sure when it went to 1/8th...maybe late '70's and has been ever since. Humboldt County Dragway. I believe it's advertised as Iowas oldest...

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SC


Posted By: WesternRed
Date Posted: Jun/23/2021 at 3:33am
That's a pretty cool venue, vastly different to what I'm used to. We have concrete wall from one end of the track to the other.

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I've finally given up drinking for good...........now I only drink for evil.


Posted By: Steve Obertanec
Date Posted: Jun/28/2021 at 8:36pm
In my opinion............

There are a few reasons for 1/4 mile tracks converting to 1/8 mile. Most of it is related to bracket racing. The shorter track helps out the venue owner or the race promotor. 

I was at a 4 day 1/8 mile race this past weekend with 450 cars in attendance. I can't say how many pairs went down the track but what I can say is there was just over an hour of down time due to breakage for the whole event. That saves on everything for the owner/promoter. Track prep, clean up time, oil dry, wear & tear on equipment, employee fatigue, etc.... Time would be the biggest advantage for the owner/promoter. 

For the racer it is so much less wear & tear on parts. Most motors expire just before the finish line. 

I don't care 1/4 or 1/8 but I am a bracket racer. We don't all do it for the speed we do it for the competition. 




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Steve Obertanec
www.stevandracing.com



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