MustangWorks.com : Ford Forums - View Single Post

Unit 5302 · 06-05-2000, 11:33 PM

Well I don't frequent this forum often, but I feel the need to chime in here.

My uncle is the original owner of a 1969 Mach 1 428CJ with the top loader 4 speed. Stock it ran 13's. The quickest quote I've seen for a production Mustang was from Car Craft testing the 1968 1/2 Mach 1 428CJ with the top loader. 0-60 5.5 sec. 1/4 mile 13.56 @ 108mph. Those numbers might be off a little in the accuracy dept. being back in the day and all, but they are reasonable for a perfect run.

My uncle also just purchased a beautiful example of the 1969 Boss 302. One of his aquaintences over the net also had a Boss 302 motor which was just dyno tuned. The motor was stock, except for the low compression pistons and the smaller 1970 valves. That motor running at a pathetic 9.0:1 compression, made 364hp and 340lb/ft of torque. A prime example would no doubt peak near 400hp. Stock. That means the 290hp gross brake rating the motor came with was accurate if you look at the net at the rear wheels.

The 428 made more power than the Boss 302. I wouldn't say much more, but it would be reasonable to expect a 428CJ in prime condition to put near 300hp to the ground.

My dad raced a 1963 Ford Convertable. I'm talking the big one with the 427. It was the 427 medium riser dual quad setup and in that 2 ton body he managed mid/low 13's. The 427 and 428 were definately similar, although to be fair the 427 was significantly more powerful in stock form, but if you stick the 5.0 SEFI motor into a 1963 Ford full size convertable and expect anything lower than 16's your crazy.

There is no question that a prime example of the FE block makes more hp than a stock roller 5.0. The only question is for how long. Everyone who knows their FE motors knows that the 390,427,428 were all short lived motors. After 70k they certainly don't have the punch they used to where a roller 5.0 is still as strong as it was off the showroom floor.

As for the comment about the 2bbl 289 not having equalling the performance of the 271hp Hi-po 289 offered in some of the Mustangs, really... do ya think? The 289 in the truck isn't cammed near the hi-po, doesn't have the heads, or the 4bbl and intake. It's not going to have anywhere near that kind of power. It's like comparing the 1979 5.0HO motor to the 1987's. Night and day. Also there was a 335hp version of the 289. It was used in the Shelby Cobra Daytona. It supposedly made 375hp with webers(just try and tune it right though).

237hp at the wheels was a sickly tuned 428 indeed.

06-05-2000, 11:33 PM	#19
Unit 5302 Registered Member Join Date: May 1999 Posts: 5,246	Well I don't frequent this forum often, but I feel the need to chime in here. My uncle is the original owner of a 1969 Mach 1 428CJ with the top loader 4 speed. Stock it ran 13's. The quickest quote I've seen for a production Mustang was from Car Craft testing the 1968 1/2 Mach 1 428CJ with the top loader. 0-60 5.5 sec. 1/4 mile 13.56 @ 108mph. Those numbers might be off a little in the accuracy dept. being back in the day and all, but they are reasonable for a perfect run. My uncle also just purchased a beautiful example of the 1969 Boss 302. One of his aquaintences over the net also had a Boss 302 motor which was just dyno tuned. The motor was stock, except for the low compression pistons and the smaller 1970 valves. That motor running at a pathetic 9.0:1 compression, made 364hp and 340lb/ft of torque. A prime example would no doubt peak near 400hp. Stock. That means the 290hp gross brake rating the motor came with was accurate if you look at the net at the rear wheels. The 428 made more power than the Boss 302. I wouldn't say much more, but it would be reasonable to expect a 428CJ in prime condition to put near 300hp to the ground. My dad raced a 1963 Ford Convertable. I'm talking the big one with the 427. It was the 427 medium riser dual quad setup and in that 2 ton body he managed mid/low 13's. The 427 and 428 were definately similar, although to be fair the 427 was significantly more powerful in stock form, but if you stick the 5.0 SEFI motor into a 1963 Ford full size convertable and expect anything lower than 16's your crazy. There is no question that a prime example of the FE block makes more hp than a stock roller 5.0. The only question is for how long. Everyone who knows their FE motors knows that the 390,427,428 were all short lived motors. After 70k they certainly don't have the punch they used to where a roller 5.0 is still as strong as it was off the showroom floor. As for the comment about the 2bbl 289 not having equalling the performance of the 271hp Hi-po 289 offered in some of the Mustangs, really... do ya think? The 289 in the truck isn't cammed near the hi-po, doesn't have the heads, or the 4bbl and intake. It's not going to have anywhere near that kind of power. It's like comparing the 1979 5.0HO motor to the 1987's. Night and day. Also there was a 335hp version of the 289. It was used in the Shelby Cobra Daytona. It supposedly made 375hp with webers(just try and tune it right though). 237hp at the wheels was a sickly tuned 428 indeed.