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Author
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Topic: 1/4 mile time for 69 Mach 1?????
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Red_69Mach1
Journeyman Posts: 28
From: Northridge, CA
Registered: Jan 2002
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posted 05-16-2002 12:40 AM
   
hi guys-I finally decieded Im going to take my car to the track this summer (Im still in school) to see what it runs. I was doing some research to see how fast stock Mach 1 (those equipped with 351s) ran. And waht I found was kind of a shock, I saw times anywhere from mid 15s to low 16s  Im confused right now, how can a car with 300hp and 385tq (I know the hp scale was gross not net back then) only turn up mid 15 timeslips.  Was it becasue of the polyglass tires? were the mach 1s they tested 2bbl or 4bbl? Any help would be appreciated becasue I want soem times so I can compare against when I go to the track.
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1969 Mach 1 with a 351 Windsor, FMX tranny with cooler, Holley Street Avenger(670cfm), Edelbrock 351W intake, mallory ignition, MSD blaster ignition coil, headers, flowmasters,
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mustangboy
Gearhead Posts: 670
From: Ont, Canada
Registered: Mar 2002
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posted 05-16-2002 02:49 AM
Yes the crappy tires would be part of the problem but its like you said the engines were rated at gross hp.Add a restrictive air filter and exhaust and all the driven accesories off of the waterpump and you have a drastic reduction in horsepower.These cars are also not as light as you might think probably 34-3500 lbs plus the driver.I think ford was a little optimistic with its horsepower figures on some of the engines as well,compare a 271hp hipo 289 to a 225 hp stock 5.0 and see which one is quicker.
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Rory McNeil
Gearhead Posts: 1235
From: Surrey, B.C. Canada
Registered: Nov 2000
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posted 05-16-2002 04:07 AM
Although I never owned a 69 Mach1 with a 351W, I have owned 2 428CJ powered 69 Mach1`s,a 70 428CJ Mach1, & 2 70 351 4V Mustangs,1 Mach1, & 1 sportsroof. I didn`t race all of these, but I did run a few. The 70 351C 4v sportsroof had a shaker scoop,FMX auto & 3.25 gears & went 14.7 @ 95mph bone stock in 1976, with 68,000 miles on the clock. The only modiications I did later were a set of Cyclone headers, hooked into the stock exhaust system, & I replaced the 4300 Autolite carb with the original 600 Holley from my 66 Fairlane GTA (390)This produced a best of 14.2@99mph This car weighed 3340lbs (no driver), A similar Mach1 would be almost 200 lbs heavier.My 69 Mach1 428, C6, with 3.5 gears weighed 3560 lbs,(no driver) & ran 13.6 @ 102 mph, stock except for a 70 style dual exh. system. My 70 428 Mach1 had a 4 speed & 4.30 gears, it ran 13.5@105 mph & weighed 3620 lbs(no driver)All these times were on street tires, G60-14`s on the 70 351 car, L60-15`s on the 70 428 car, & 235 60R14`s on the 69 428 car.Slicks helped both 428 cars, esp. the 4 speed car. As for 69 351 Mach1`s, I remember seeing lots on the street, but very few at the dragstrip. Back in the 70`s everyone wanted Clevelands, Windsors were basically unpopular. The few stock 351W 4v cars that did venture out to the track were in the mid-low 15`s, as I recall.------------------
78 Fairmont 428 4 speed 10.20@130mph
80 Fairmont 302 5 speed 12.8@105mph
85 Mustang NHRA Stocker under construction, 302 5 speed
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bluestreek
Gearhead Posts: 1332
From: Athens,GA
Registered: Jul 2001
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posted 05-16-2002 10:26 AM
290 HP at the crankshft on a '69 351W sounds about right. I have a 20 yr old Muscle Car guide that says a '69 Grande (351W) went 15.6 sec in 1/4 mi.
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bifs66
Gearhead Posts: 169
From: Maryland
Registered: Apr 2000
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posted 05-16-2002 09:42 PM
I can give you the 1/4 mile times for one particular 290 HP, auto, totally stock 1969 Mach I. I took my new Mach-I to Capital Raceway Park in MD. a few weeks after I took delivery and it turned a 14.8 quarter on stock Goodyear Polyglass F-70 14s. I still have the time slips. The only tuning I did was remove the air filter which was good for a tenth or two.------------------
Bernie Frank
66 Fastback restomod project
85 GT (preserved)
82 GT (original)
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