427 v. 428

The GT-E was only available for a few brief months in 1968. Total production would not have kept the assembly line busy for more than a half day. If you know anything about a GT-E, it is important, and this is the place to share it. The GT-E registry is maintained by Jim Pinkerton.
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HarstenePointe
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427 v. 428

#1

Post by HarstenePointe » 16 Jan 2019, 19:58

Does anyone have any actual and honest performance numbers comparing the 427 and 428 engines? I certainly know the factory horsepower ratings, etc., but I’m looking for the real world numbers.

During those several months in 1968 when someone could order either engine in their GTE, and assuming that they actually had a choice, which one would someone choose and why? For example, does anybody have any 0 to 60 or quarter-mile times?

Sorry if this has been asked and answered previously, but I don’t have the information.
67 XR7 Cinnamon Frost - parents bought it new
68 XR7 GTE - red - 428
69 XR7 Convertible Black - 351/4V
70 Eliminator Comp Gold - 351/4V 4-speed

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Al Bundy
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Re: 427 v. 428

#2

Post by Al Bundy » 16 Jan 2019, 21:49

Are we going back in time to choose knowing what we do now?
1974 Dodge Dart - daily driver
1963 Thunderbird Z code - raven black/red
1968 XR7 F code - diamond blue/blue
1968 XR7 J code - black/red
1968 J code - madras blue/aqua
1968 XR7 X code - lime frost/dark ivy gold
1968 GT-E XR7 W code prototype no. 500033 - cardinal red/black

CATHOUSE
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Re: 427 v. 428

#3

Post by CATHOUSE » 16 Jan 2019, 22:19

If I had been old enough in 1968 to order a new GTE I would option it with the XR-7 package and the 428 CJ. Why the 428? Because it was available with a 4 speed, and in 1968 a real muscle car had a manual transmission.

Randy Goodling
CCOA #95

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Royce
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Re: 427 v. 428

#4

Post by Royce » 16 Jan 2019, 22:42

I have owned both and driven them at the drag strip. Virtually identical performance. The 427 is beefier so it would take more abuse without damage.
1968 GT-E XR-7 W code 427 Augusta Green / Saddle
1968 XR-7 R code 428CJ Ram Air Red / Black
1910 Model T Ford Touring Red / Black
1914 Model T Touring Maroon / Black
1915 Model T Ford Touring Black / Black
1917 Model T Ford Torpedo Runabout Green / Black
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robert campbell
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Re: 427 v. 428

#5

Post by robert campbell » 16 Jan 2019, 23:17

The 1968 GTE 427 is strangled by the GT-390 exhaust manifold and the 600 cfm carb. I am assuming that the late run GTE's came with the 428 Cobra Jet exhaust manifolds and the 735 cfm carb? Both engines used a very similar hydraulic camshaft. If the second sentence is true then it is a no brainer that the 428 GTE would run away from the 427 version. Maybe some later 427 GTE's came with CJ exhaust manifolds? If so that would help.

I think the addition of the 735 and CJ exhaust manifolds would make them virtually the same. The 1968 427 with the cross bolt mains and side oiler system is certainly a better choice for high rpm work and longevity. And I have owned 2 Cobra Jets. And been around a lot of the earlier Medium and High riser versions of the 427. They were far more potent than a 428 CJ in stock form.

I just installed the GT-390 Exhaust manifolds and 2 inch H pipe on Bart’s GTE today. What a shame to choke off such a cool motor. Tomorrow I will go through the 600 cfm carb that we got from Royce. Also a shame to put that on a 427! Especially when Bart had a set of CJ exhaust manifolds and I have a good 735 that we could have bolted on.

By the way Harstein Point. I am in Bremerton!!

Rob

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MercuryDon
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Re: 427 v. 428

#6

Post by MercuryDon » 17 Jan 2019, 00:58

Back in the day I had a 427 GTE and a 428CJ GT500KR. I found the 427 would pull hard to 6000rpms while the 428 pulled hard to 5500rpms. Raced them both at Mn drag ways and Twin city speedway. The 427 ran way better times.
68 427 GTE-XR7 Dk Blue/Dk Blue(1 of 3 Color/trim) C6 3.50TL
68 390 4V XR7G Dk Blue/Dk Blue w/Sunroof C6 3.25TL
69 428SCJ 4spd XR7 Conv't.White/Aqua 12K miles(1 of 1 with 4.30DL)
69 428CJ 4Spd Cyclone CJ Maroon/Blk 29K miles 3.50TL
68 390 4V Cyclone GT. Madras/White C6 3.00 (Introductory Show unit)
69 390 4Spd XR7 Sunroof Med.Lime/Dark Ivy 3.00
68 390 4V Cyclone GT White/Red C6 3.25
04 Cobra Conv't.4.6 DOHC Supercharged Blk/Grey 3.50TL
70 390 Javelin SST Big Bad Grn/Blk 700R4 4.10 Dana 44
98 Dakota R/T 5.9 Std Cab Blue/Grey(1 of 32) 3.91SG
71 Thunderbird 429 w/suicide doors Copper/Drk.Brn 2.75
06 Dodge SRT10. 11k miles 488 cube Viper V10. 505hp. 6 spd. 4.10SG

HarstenePointe
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Re: 427 v. 428

#7

Post by HarstenePointe » 17 Jan 2019, 08:46

Al Bundy wrote:
16 Jan 2019, 21:49
Are we going back in time to choose knowing what we do now?
I guess I am asking more about “back in the day” stock motor as produced by the factory (unless back in the day you would have bought it for immediate modification).

I am not asking about collectibility or value now, I am asking if you were at the dealer and had to check a box on the order form, which one?
67 XR7 Cinnamon Frost - parents bought it new
68 XR7 GTE - red - 428
69 XR7 Convertible Black - 351/4V
70 Eliminator Comp Gold - 351/4V 4-speed

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Royce
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Location: Dallas, TX

Re: 427 v. 428

#8

Post by Royce » 17 Jan 2019, 10:24

You would think the 428CJ would be the obvious choice. The 428CJ could be bought in a standard cougar. Maybe Bill B could run the numbers, but I suspect that the buyer would save at least $1000 compared to buying a 427 in a standard GT-E. That is like saving 20K today. While the 428CJ is more fragile, for the average motorhead it would have been just fine.

Most folks in those days would have immediately put in an aftermarket radio and wheels. Headers would be fitted to probably 75% of muscle cars within a month or two of leaving the dealer. That saved money would easily pay for all those things and gas for a year.

Of course the opposite is what actually happened. 427 GT-E's are much more common than 428CJ Cougars in '68.

HarstenePointe wrote:
17 Jan 2019, 08:46
Al Bundy wrote:
16 Jan 2019, 21:49
Are we going back in time to choose knowing what we do now?
I guess I am asking more about “back in the day” stock motor as produced by the factory (unless back in the day you would have bought it for immediate modification).

I am not asking about collectibility or value now, I am asking if you were at the dealer and had to check a box on the order form, which one?
1968 GT-E XR-7 W code 427 Augusta Green / Saddle
1968 XR-7 R code 428CJ Ram Air Red / Black
1910 Model T Ford Touring Red / Black
1914 Model T Touring Maroon / Black
1915 Model T Ford Touring Black / Black
1917 Model T Ford Torpedo Runabout Green / Black
XR7-G Registrar

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Don Rush
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Re: 427 v. 428

#9

Post by Don Rush » 17 Jan 2019, 11:20

CATHOUSE wrote:
16 Jan 2019, 22:19
If I had been old enough in 1968 to order a new GTE I would option it with the XR-7 package and the 428 CJ. Why the 428? Because it was available with a 4 speed, and in 1968 a real muscle car had a manual transmission.

Randy Goodling
CCOA #95
And a functional hood scoop!

robert campbell
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Re: 427 v. 428

#10

Post by robert campbell » 17 Jan 2019, 12:03

MercuryDon wrote:
17 Jan 2019, 00:58
Back in the day I had a 427 GTE and a 428CJ GT500KR. I found the 427 would pull hard to 6000rpms while the 428 pulled hard to 5500rpms. Raced them both at Mn drag ways and Twin city speedway. The 427 ran way better times.
Were they both totally stock? Same rear end gears? Same tranny? If so, I would love to go back in time and tune that KR. I had a KR in 1975 and it pulled hard way past 5,500 rpm. It was totally stock!

Rob

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