Match Race ~ 1970 'Duster 340' vs. 1969 Mustang 'Mach 1' 351W

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69 Cuda 440 said:
General Specs

1970 Plymouth 'Duster 340' {340/275 HP}

275 HP @ 5000 RPM's
340 Ft/Lbs. of Torque @ 3200 RPM's

Shipping Weight.......... #3109 lbs.
#3109 lbs.~ 275 HP = 11.30 Wt/HP

1970 NHRA Factor = 310 HP

#3109 lbs. ~ 310 HP = 10.03 Wt/HP {1970 NHRA Class > G/Stock}
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1969 Ford Mustang 'Mach 1' Fastback {351/290 HP}

290 HP @ 4800 RPM's
380 Ft/Lbs. of Torque @ 3400 RPM's

Shipping Weight.......... #3381 lbs.

#3381 lbs. ~ 290 HP = 11.69 Wt/HP {1970 NHRA Class > J/Stock}

No re-factoring changes in 1970.
Click to expand...
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Current NHRA Factors

Stock Class ............. 340/275 HP .... {299 HP}
Super Stock Class .... 340/275 HP .... {286 HP}

Stock Class ............. 351/290 HP .... {290 HP}
Super Stock Class .... 351/290 HP .... {260 HP}
 
69 Cuda 440 said:
'Heads Up in the Quarter-Mile'

*1970 'Duster 340', 4-Speed and 3.23 Gears w/'Sure-Grip'
vs.
* 1969 Mustang 'Mach 1' 351W, 4-Speed {Close-Ratio}, and 3.91 Gears w/'Traction-Lok'

I'd still take the 'Duster 340' everyday of the Week.
Click to expand...

As spec'd above that would be a close race, but the Mustang's got the edge with the gears. Give the 340 car the same treatment in terms of rear axle - and it's a definate mopar win assuming equal drivers/traction/state of tune.
 
images
 
fratzog lover said:
Why am I thinking .429/.444? Replacement cam specs?
Click to expand...

1970 {340/275 HP} Camshaft Specifications {As per the Factory blueprint}
Lift ....................... .430"/.445"
Duration ................ 268*/276*
Duration @ .050" .... 210*/221*
LSA ....................... 114*
Centerline............... 112*

Replacement {340/275} Camshaft {P/N #4452782}
Lift........................ .429"/.444"
Duration................. 268*/276*
Duration @ .050"..... 228*/235*
LSA........................ 114*
Centerline............... 112*

Replacement {340/275 HP} Camshaft {P/N #2899206}
Lift....................... .430"/.444"
Duration................ 268*/276*
Duration @ .050" ... 210*/220*
LSA....................... 114*
Centerline.............. 112*
 
If a 1969 Mach 1 rolls up next to a 70 340 Duster it would have to have a Cobra Jet in it to be a player. The 351w and the 390 were no enough to do the job in 69. The Cleveland for 70 "may" be a very good race as long as the cars are created equal . The 71 Boss 351 would probably be enough to send the Duster home in a body bag. They are a hot package. A 71 Duster would have a better chance with the Boss
 
I believe historically, the Mustang wasn't a competitor at all at least not in the early days. That is why they widened the strut towers in 67 to fit the 390 under the Mustang hood. Ford really didn't have **** in the Musclecar era that is why they had those Big 427-428-429 cars. And they were expensive also so yeah they weren't competitive with say the 68 Road runner or 340 Duster.
 
In 1969,

They were 'far' and 'few' between, but you could order a 'Mach 1' with a
351W, with a Close-Ratio 4-Speed, and 4.30 Gears w/'Traction-Lok'.

With just, 7" Cheater-Slicks {legal for Stock Class} and Hedman Headers,
you could get that Mustang down into the low 14.00's.
 
69 Cuda 440 said:
EL5,

That is for another day.
Click to expand...

I can answer that. Kind of. When the late great Terminal Island Raceway was open(goggle it, it was a cool dragstrip) me and my 383 '68 Dart 4sp(yea I know..I regret selling that one everyday) and my co-worker in his 69 Mach 1 428CJ automatic lined up 5 times. 5 races and I had him by 4 car lengths(his best run) everytime. Two weeks later we did the same thing but with my '70 Dart Swinger 340. 5 runs. This time it was 6 cars lengths consistently. Something about Mustangs; they just weren't fast out of the box. 340 was/is a magnificent engine. Even the 72/73s. But 68-71 were great years for that motor. Never understood why they put them in 71 and up Chargers and Roadrunners.
 
Scatpacktom said:
If a 1969 Mach 1 rolls up next to a 70 340 Duster it would have to have a Cobra Jet in it to be a player. The 351w and the 390 were no enough to do the job in 69. The Cleveland for 70 "may" be a very good race as long as the cars are created equal . The 71 Boss 351 would probably be enough to send the Duster home in a body bag. They are a hot package. A 71 Duster would have a better chance with the Boss
Click to expand...
I agree. I was on the receiving end of one of those Boss 351s in a 71 Mustang. I lost by 1 car length in my 70 340 swinger.
 
1969 'Mach 1' Mustangs

'Back In The Day', you needed >

> 'Traction-Master' traction-bars, and Rear Shock plates.

Too much axle wind-up with those cars, as the back end was too light.

Today....... 'Cal-Tracs'
 
1969 351W

Cylinder Heads......... #C90E-G

Regarded as the 'best' flowing stock Cylinder Head for the 289/302/351W.

Intake Valve................. 1.852"
Exhaust Valve............... 1.548"

Intake Port Size............. 1.94" x 1.04"
Exhaust Port Size........... 1.24" x 1.00"

Intake Runner Volume..... 140 CC's
Exhaust Runner Volume.... 55 CC's

Intake Port Flow.............. 173 CFM @ .450" Lift
Exhaust Port Flow............ 114 CFM @ .450" Lift

Combustion Chamber...... 'Closed'
Factory.......................... 60.4 CC's
Minimum....................... 58.9 CC's

* Good flowing Heads for Street Performance Engines.
* Narrow runners provide good bottom-end torque and mid-range power.
* Restricted flow at high RPM's.
* Thermoactor-hump in the exhaust port restricts flow.
 
Don't forget the famous Ford retarded cam timing.
 
RustyRatRod said:
Don't forget the famous Ford retarded cam timing.
Click to expand...

I didn't think they started retarding cam timing until '72 or so, for emissions. Did they do that in all their engines, or was it just the 385-series big blocks?
 
1969 351W 290 HP

The dual-plane/low-rise cast iron intake manifold (#C90E-9425-E} was a decent unit for bottom-end torque and mid-range power.

But, the small port size really 'suffocated' top-end breathing.

Port Size.................. 1.84" x 1.02"

Throttle Bore Sizes.... 1.437" {Primary} x 1.563" {Secondary}

And, a 'heavy bastard' at 53 lbs.

$(KGrHqZ,!oQFJuehZI(cBScqhErl+!~~60_1.JPG
 
Aaron65 said:
I didn't think they started retarding cam timing until '72 or so, for emissions. Did they do that in all their engines, or was it just the 385-series big blocks?
Click to expand...

I've seen cams retarded in 289s as far back as 65. Ford was famous for it.
 
I would take the duster any day! Even if the duster had 2 mice running on a wheel under the hood and the mustang had the biggest motor ford made under the hood id still take the mopar!!! Think I'm turning into a mopar snob. Lol
 
1969 351W {290 HP}

The C90ZF Autolite {4300 Series} Carburetor {470 CFM} did the 351W no favors at high RPM's.

Throttle Bores = 1.437" {Primary} x 1.563" {Secondary}

That Carburetor was no match against the 340's Carter AVS {630 CFM}.
 
1969 Ford Mustang 'Mach 1' 351W {290 HP ~ 4V ~ 'Code M'}

Production Numbers for the 'Sports Roof' Model ......... 35,679

That's a lot of 'Fastback' Pony's.
 
Roy,

1969 Mustang 'Mach 1' 351W {290 HP}

Standard Gear Ratio w/FMX Automatic
* 3.00 {Open}

Standard Gear Ratio w/3-Speed Manual
* 3.00 {Open}

Standard Gear Ratio w/4-Speed {Wide-Ratio}
* 3.25 {Open}

Standard Gear Ratio w/4-Speed {Close-Ratio}
* 3.50 {Traction-Lok}
 
69 Cuda 440 said:
351/290 HP 'Code M'

Bore........................... 4.001"
Stroke........................ 3.500"

Compression Ratio ....... 10.70
Piston Type.................. Flat w/Notches {6.99 CC Volume}
Deck Height................. -.015"

Cylinder Head............. #C90E-G
Chamber Type ............ Closed
Combustion Chamber... 58.90 {Minimum} ~ {60.4 Factory Level}

Intake Valve............... 1.852"
Exhaust Valve............. 1.548"

Camshaft................... Hydraulic
Lift............................ .425"/.450"
Duration..................... 256*/270*
Overlap...................... 33*

Valve Spring.............. Single-Coil w/Damper
Valve Closed............. #89 lbs.
Valve Open............... #233 lbs.
Click to expand...

Same cam used, in the '82 Mustang GT. Repackaged remnants selling cars ( 351 Windsor cam , & a 2 barrel) , a sorry SROD stick shift, & a better flowing monolithic catalyst system. Just,Damn..
 
69 Cuda 440 said:
1969 Ford Mustang 'Mach 1'

Base Model
* 351/290 HP > 'Code M'
* 4-Speed {Wide-Ratio} 2.78 / 1.93 / 1.36 / 1.00
* 3.25 Gears.

Results > 15.60's @ 89 MPH.

Add Options;
* 4-Speed {Close-Ratio} 2.32 / 1.69 / 1.29 / 1.00
* 3.91 Gears w/Traction-Lok
* Shaker Hood {Air Scoop}

Results > 14.90's @ 93 MPH
Click to expand...

The Shaker Hood scoop was not avalaible on 1969 351 Mustang.
 
philcollins said:
The Shaker Hood scoop was not avalaible on 1969 351 Mustang.
Click to expand...

Hold on there Phil,

The 'Shaker Hood' was available for $84.25, as an option on both the 1969
Mustang Mach 1 with the >
* 351W 290 HP {4-Barrel}
* 390/320 HP

It is 'clearly' printed in the Sales Brochure, stating that the Shaker 'functional'
Hood Scoop is available as an option on the Mach 1 with either the >

* 351W 290 HP {M-Code}
* 390/320 HP {S-Code}
 
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