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Old 2009-08-24, 11:13   #1
DaMadman
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Horsepower and 1/4 mile times for Old Muscle Cars

I don't know why I have never paid attention to this before? I guess because I never really took any of my cars to the drag strip before I got these mavericks.

Anyway while watching some of these HorsePower TV and Muscle car shows on Saturday and Sunday Morning I have noticed a lot lately that when they give the horsepower and 1/4 mile times for a lot of these old muscle cars, most of them (when stock) were only running the 1/4 mile in the 15's.

I was really suprised they were sayign that the 454 Chevelle back in it's hayday stock from the dealer was a low 15 second car in the 1/4, of course they added that with VERY little tuning and a tweek hear and a tweek there they would run into the 13's pretty easily.

But even the top of the line GTO they were saying was a stock low-mid 14 second 1/4 mile car. which with the tweaks and tuning would easily shoot down into the 12's but still I guess I just never paid much attention but I always thought that those 60's and ealry 70's muscle cars were always faster than that in the 1/4 when they were stock.

Made me feel a little bit better about my Maverick only running in the very low 15's for a little while anyway. At least until the memories of the new 6 cyl stang running next to me in the high 14's and the 4 cyl. rice rockets runnign in the low 14's and high 13's came back to the fore front of my mind

The 1967 Pontiac GTOSpecifications
Wheelbase, inches: 115.0
Weight, lbs: 3,425
Number built: 81,722
Base price: $2,871

Top Available Engine
Type: ohv V-8
Displacement, cid: 400
Fuel system: 1 x 4 bbl.
Compression ratio: 10.75:1
Horsepower @ rpm: 360 @ 5400
Torque @ rpm: 438 @ 3800

Representative Performance
0-60 mph, sec: 6.6
1/4 mile, sec @ mph: 14.66 @ 99
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Last edited by DaMadman; 2009-08-24 at 11:16.
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Old 2009-08-24, 11:37   #2
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I think about that every once in a while. My 308 has turned an 11.81 in the 1/4. Back then that was a fast super stocker. But you got to remember the advances made in the tires, and especially in the heads allowing engines to breath more.
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Old 2009-08-24, 12:05   #3
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yeah I mean can you imagine back then a GTO being the hottest thing on the street. going up against a slightly modified 302 maverick and the Maverick whoopin the GTO's arse. how embarrising would that be to race your GTO against Fords litle bastard child econobox and get your $h1t stomped in the ground
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Old 2009-08-24, 12:39   #4
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Bone stock muscle cars back in the day were very limited by carb size, exhaust and tires. Fifteen second times were very respectable and common for the higher horsepower machines. For instance my 70 Cyclone Spoiler with the 429cj in stock trim in 1980 ran 15's. Some tuning, good carb, headers and slicks (with old school slapper bars) got it down into the 12's. But as it has been said, it doesn't take much to unleash the extra hp and get it to the ground. That's what the old super stock guys used to do. It was all in the tune and traction.
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Old 2009-08-24, 13:03   #5
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there are two major reasons that the time were slow compared to what we are used to now days. first as mentioned the tires. the tires were lousy for traction so these monster torquey motors would just blow the tires off at low speeds. second the was the drivers used for most of the reported 1/4 mile times were journalists from car and driver that knew more about typing than trying to launch and dragrace a car.
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Old 2009-08-24, 15:05   #6
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I saw an old show the other day where 2 of the Slingshot dragsters were racing. They both smoke the tires all the way down the track. I thought man they both broke loose but neither lifted. The next 2 were the same way. lol
Tied has come a LONG way
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Old 2009-08-24, 15:32   #7
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Quote:
Originally Posted by DaMadman View Post
Type: ohv V-8
Displacement, cid: 400
Fuel system: 1 x 4 bbl.
Compression ratio: 10.75:1
Horsepower @ rpm: 360 @ 5400
Torque @ rpm: 438 @ 3800

Representative Performance
0-60 mph, sec: 6.6
1/4 mile, sec @ mph: 14.66 @ 99
how about the 389... i have herd tones of stories of it being BAD
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Old 2009-08-24, 16:51   #8
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My 68 Plymouth GTX ran 13.94 et at 103 mph on street tires and through the mufflers this was a 3580 lbs. car after a few mods. ( headers, gears, 4.56 tires a lot of tuning ) the best time was 11.00 at 128 mph and drove it to the track ( Orange County Raceway in Irvine Ca.)



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Old 2009-08-24, 18:00   #9
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Yeah, until the LSx engines, the quickest domestic 'muscle car' was the Boss 351 which ran very low 13s. The 68 Mustang 428cj coupe was a very close second.

As for the LS5, LS6, L88, L89, L78... Chevys, the only reason I can think that they wouldn't run high 13s, low 14s is due to tires. These engines would have had a much stronger low end than the Boss 351. Therefore they probably just blew the tires into smoke, while the higher rpm 351c wouldn't have the torque overload problem.

Just a guess
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Old 2009-08-24, 18:51   #10
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1969.5 M code Road Runner ran 12.91 at 111.9 mph.
The only cars faster were freaking 427 Cobras and Vettes.
Chevelles and GTOs can suck MOPAR fumes.
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