347 or 427???
- Thread starter Buckhunter125@h
- Start date
i prefer the better rod/stroke ratio of the 331 over the 347. i do realize that the various companies have corrected the issues with the early 347 kits. the 347 is a nice combo, and fun to brag about, but i think the 331 is better overall.
Hack
15 Year Member
I don't actually laugh when people talk like they're made of money when giving advice to others and then do something totally different on their own project - but I am amused by it.
Hack
15 Year Member
They had to do a TON of reinforcement to that car in order to make it do what you see in the movie.. and then it was scrap after the movie. It is gone. That always upset me as well as the fact that the Charger didn't need any reinforcement.
Kinda like the Dukes of Hazzard - they didn't really drive away from those car jumps, you know.
347 vs 331 . . . I thought that was only an internet myth.
I know several 347s that were built in the "early days" of the common stroker package (late 90s).
If you have someone competent build it, then you are fine. Most of these problems were people that didn't check their own ring gap or install the rings right.
the 5.400" rod still makes 20-30rwhp more than a 331 and won't have an issue if you have something in-between your ears.
I know several 347s that were built in the "early days" of the common stroker package (late 90s).
If you have someone competent build it, then you are fine. Most of these problems were people that didn't check their own ring gap or install the rings right.
the 5.400" rod still makes 20-30rwhp more than a 331 and won't have an issue if you have something in-between your ears.
mrmustangman357
Member
- Feb 11, 2007
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for engine choice with rotating assembly choices: stroked 351 to a 393 with AFR heads would kick that 427's butt!
393W beats 427FE? I don't think so.
427W vs 428FE:
Testing 427 Windsor Vs 428 FE - Mustang & Fords Magazine
The 428 was actually a .60 over 390 or 422. FE made 505 hp, the "W" made 486.
Use a real 427.
427W vs 428FE:
Testing 427 Windsor Vs 428 FE - Mustang & Fords Magazine
The 428 was actually a .60 over 390 or 422. FE made 505 hp, the "W" made 486.
Use a real 427.
Attachments
1. At 1.2 HP/CI, it would be a 23 HP difference if you compared the same displacement.
2. Most charts put the weight difference between an FE and a W at 85-100lbs.
3. An FE intake is huge and weighs over 75lbs. An aluminum intake weighs 24lbs. Yes aluminum W intakes also weigh less but the net savings isn't as drastic. So the true delta between the engines is closer to 50-75lbs.
4. You can stroke FEs too, so 427 is just the starting point...
uh oh . . . put down the calculator for a minute.
A large majority of 347s I have tuned/seen made 390-400rwhp. Some more, very few less. Most of the 331s I know of/tuned made 360-370rwhp. A few less, very few more.
Mathematically you could blow a ton of smoke, but from what I have seen on the dyno the 347 makes more average power (obviously) and usually makes 20-30rwhp with the same given stuff: AFR 185s/Holley Systemax/OTS hyd roller, 1.75" headers, 3" exhaust
mrmustangman357
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- Feb 11, 2007
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if you look anywhere near the dollar per hp, the 393W would rape that 427. plus no horrible fitmet issue and all your stuff bolts on anyway! the only reason a 427 would be in there is for wow factor or because you have $$$$$$$. a 393 would lay down the power and kill that 427 at half the price! and reliably with no parts issue whatsoever.
A TON? Like better springs and shocks? The roll cage was for driver safety not to stiffen the chassis. That was done to the Chargers too. Magazine articles about the movie/car(s) didn't come out until years later. Peoples recollection of what was done probably varied greatly. Yes, the car was trashed afterwards. Every body panel was dented and I am sure the subframe was twisted. It cost more to repair than the car was worth (then).
HowStuffWorks "Mustang Stars in Bullitt"
"Two identical Mustangs and two matching Chargers were used in the Bullitt chase sequence. So that the four-speed Mustang could run more easily with the brawnier four-speed 440 Magnum Charger, Hollywood engineer Max Balchowsky installed a racing cam on both Fords, milled the heads, and modified the ignition and carburetion systems. Additionally, Balchowsky bulked up the suspensions of all four cars for improved strength, handling, and control. One Mustang and one Charger were fitted with a full roll cage."
Go drive a 2008 Mustang with a V6 and a V8. Are you going to walk away from the test drives going "Wow the V6 Mustang with the 100lb lighter engine handles so much better" or "The HP and Tq from the V8 was awesome."
Hack
15 Year Member
Well, that's another version of what happened. The version I read was that only the Mustang doing the jumps needed reinforcement of the front suspension and not the Charger. It was many years ago when I read about it. I have no idea which version is correct. The details in the story you quoted make it seem possible that it's the correct version.
I would actually say both - at least where my convertible is concerned I like the power of the V8, but it handles comparatively crappy with more weight in the front. I still would want a V8, but not a big block. I'd rather do a strong small block for a more well-balanced package. I love not having to slow down for corners and cloverleafs.
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