360-383 A-debate...max builds need not apply.

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LO23M8B said:
Yep. Owned a 71 RR with a 340 and it beat the **** out of 383 RR's.
Click to expand...
You are one of a very few. lol
the year was 1980 my buddy in high school had a yellow 71 340 RR and my 67 fastback had a 68 383 magnum.
needless to say I walked all over him stop light to stop light, 1/8 and 1/4 mile. no matter it was not even close. lol
even the kid from the other town with his 350 SS Nova never stood a chance. 390 stangs you name it I took it. lol
 
Must have been a torque beast as the HP was rated at 185...cough!
V8-400 2-bbl 4.34 x 3.38 8.2:1 185 @ 3600 310 @ 2400
1973-74 weren't great years for power output.....
1973
6-225 1-bbl 3.40 x 4.12 8.4:1 105 @ 4000 185 @ 1600 45-65
V8-318 2-bbl 3.91 x 3.31 8.6:1 150 @ 3600 265 @ 2000 45-65
V8-340 4-bbl 4.04 x 3.31 8.5:1 240 @ 4800 295 @ 3600 45-65
V8-360 2-bbl 4.00 x 3.58 8.4:1 170 @ 4000 285 @ 2400 45-65
V8-400 2-bbl 4.34 x 3.38 8.2:1 185 @ 3600 310 @ 2400 45-65
V8-400 4-bbl 4.34 x 3.38 8.2:1 260 @ 4800 335 @ 3600 45-65
V8-440 4-bbl 4.32 x 3.75 8.2:1 220 @ 3600 350 @ 2400 45-65
V8-440 4-bbl 4.32 x 3.75 8.2:1 275 @ 4800 380 @ 3200 45-65

1974
6-225 1-bbl 3.40 x 4.12 8.4:1 105 @ 3600 180 @ 1600 45-65
V8-318 2-bbl 3.91 x 3.31 8.6:1 150 @ 4000 255 @ 2200 45-65
V8-318 2-bbl 3.91 x 3.31 8.6:1 170 @ 4000 265 @ 2600 45-65
V8-360 2-bbl 4.00 x 3.58 8.4:1 180 @ 4000 290 @ 2400 45-65
V8-360 4-bbl 4.00 x 3.58 8.4:1 200 @ 4000 290 @ 3200 45-65
V8-360 4-bbl 4.00 x 3.58 8.4:1 245 @ 4800 320 @ 3600 45-65
V8-400 2-bbl 4.34 x 3.38 8.2:1 185 @ 4000 315 @ 2400 45-65
V8-400 4-bbl 4.34 x 3.38 8.2:1 205 @ 4400 310 @ 2400 45-65
V8-400 4-bbl 4.34 x 3.38 8.2:1 250 @ 4800 330 @ 3400 45-65
V8-440 4-bbl 4.32 x 3.75 8.2:1 230 @ 3600 350 @ 3200 45-65
V8-440
(Calif.) 4-bbl 4.32 x 3.75 8.2:1 220 @ 3600 345 @ 3200 45-65
V8-440 4-bbl 4.32 x 3.75 8.2:1 275 @ 4400 375 @ 3200 45-65

Mopar Chrysler Engine Specifications - MyMopar.com
 
fishmens67 said:
You are one of a very few. lol
the year was 1980 my buddy in high school had a yellow 71 340 RR and my 67 fastback had a 68 383 magnum.
needless to say I walked all over him stop light to stop light, 1/8 and 1/4 mile. no matter it was not even close. lol
even the kid from the other town with his 350 SS Nova never stood a chance. 390 stangs you name it I took it. lol
Click to expand...
It all comes down to meeting the "right" guy. Over 30 yrs at the drag strip off and on and I've seen built 340's with 4.11 gears choke a mid 14. I also seen next to stock with 3.55's go mid 13's. I think it comes down to if "a guy" knows what to do and if he can tune. I've seen a few "mild" 383's in A-bodies run mid 11's. If somebody can't get a 383 to run, or a 360 for that matter, it's on the owner.
 
pishta said:
Must have been a torque beast as the HP was rated at 185...cough!
V8-400 2-bbl 4.34 x 3.38 8.2:1 185 @ 3600 310 @ 2400
1973-74 weren't great years for power output.....
1973
6-225 1-bbl 3.40 x 4.12 8.4:1 105 @ 4000 185 @ 1600 45-65
V8-318 2-bbl 3.91 x 3.31 8.6:1 150 @ 3600 265 @ 2000 45-65
V8-340 4-bbl 4.04 x 3.31 8.5:1 240 @ 4800 295 @ 3600 45-65
V8-360 2-bbl 4.00 x 3.58 8.4:1 170 @ 4000 285 @ 2400 45-65
V8-400 2-bbl 4.34 x 3.38 8.2:1 185 @ 3600 310 @ 2400 45-65
V8-400 4-bbl 4.34 x 3.38 8.2:1 260 @ 4800 335 @ 3600 45-65
V8-440 4-bbl 4.32 x 3.75 8.2:1 220 @ 3600 350 @ 2400 45-65
V8-440 4-bbl 4.32 x 3.75 8.2:1 275 @ 4800 380 @ 3200 45-65

1974
6-225 1-bbl 3.40 x 4.12 8.4:1 105 @ 3600 180 @ 1600 45-65
V8-318 2-bbl 3.91 x 3.31 8.6:1 150 @ 4000 255 @ 2200 45-65
V8-318 2-bbl 3.91 x 3.31 8.6:1 170 @ 4000 265 @ 2600 45-65
V8-360 2-bbl 4.00 x 3.58 8.4:1 180 @ 4000 290 @ 2400 45-65
V8-360 4-bbl 4.00 x 3.58 8.4:1 200 @ 4000 290 @ 3200 45-65
V8-360 4-bbl 4.00 x 3.58 8.4:1 245 @ 4800 320 @ 3600 45-65
V8-400 2-bbl 4.34 x 3.38 8.2:1 185 @ 4000 315 @ 2400 45-65
V8-400 4-bbl 4.34 x 3.38 8.2:1 205 @ 4400 310 @ 2400 45-65
V8-400 4-bbl 4.34 x 3.38 8.2:1 250 @ 4800 330 @ 3400 45-65
V8-440 4-bbl 4.32 x 3.75 8.2:1 230 @ 3600 350 @ 3200 45-65
V8-440
(Calif.) 4-bbl 4.32 x 3.75 8.2:1 220 @ 3600 345 @ 3200 45-65
V8-440 4-bbl 4.32 x 3.75 8.2:1 275 @ 4400 375 @ 3200 45-65

Mopar Chrysler Engine Specifications - MyMopar.com
Click to expand...
For me, I'm not a numbers posted guy. ET slips don't usually lie. Like I say, I love my small block mopars, and I currently have about 9 small blocks and 2 big blocks.
 
pishta said:
Must have been a torque beast as the HP was rated at 185...cough!
V8-400 2-bbl 4.34 x 3.38 8.2:1 185 @ 3600 310 @ 2400
1973-74 weren't great years for power output.....
1973
6-225 1-bbl 3.40 x 4.12 8.4:1 105 @ 4000 185 @ 1600 45-65
V8-318 2-bbl 3.91 x 3.31 8.6:1 150 @ 3600 265 @ 2000 45-65
V8-340 4-bbl 4.04 x 3.31 8.5:1 240 @ 4800 295 @ 3600 45-65
V8-360 2-bbl 4.00 x 3.58 8.4:1 170 @ 4000 285 @ 2400 45-65
V8-400 2-bbl 4.34 x 3.38 8.2:1 185 @ 3600 310 @ 2400 45-65
V8-400 4-bbl 4.34 x 3.38 8.2:1 260 @ 4800 335 @ 3600 45-65
V8-440 4-bbl 4.32 x 3.75 8.2:1 220 @ 3600 350 @ 2400 45-65
V8-440 4-bbl 4.32 x 3.75 8.2:1 275 @ 4800 380 @ 3200 45-65

1974
6-225 1-bbl 3.40 x 4.12 8.4:1 105 @ 3600 180 @ 1600 45-65
V8-318 2-bbl 3.91 x 3.31 8.6:1 150 @ 4000 255 @ 2200 45-65
V8-318 2-bbl 3.91 x 3.31 8.6:1 170 @ 4000 265 @ 2600 45-65
V8-360 2-bbl 4.00 x 3.58 8.4:1 180 @ 4000 290 @ 2400 45-65
V8-360 4-bbl 4.00 x 3.58 8.4:1 200 @ 4000 290 @ 3200 45-65
V8-360 4-bbl 4.00 x 3.58 8.4:1 245 @ 4800 320 @ 3600 45-65
V8-400 2-bbl 4.34 x 3.38 8.2:1 185 @ 4000 315 @ 2400 45-65
V8-400 4-bbl 4.34 x 3.38 8.2:1 205 @ 4400 310 @ 2400 45-65
V8-400 4-bbl 4.34 x 3.38 8.2:1 250 @ 4800 330 @ 3400 45-65
V8-440 4-bbl 4.32 x 3.75 8.2:1 230 @ 3600 350 @ 3200 45-65
V8-440
(Calif.) 4-bbl 4.32 x 3.75 8.2:1 220 @ 3600 345 @ 3200 45-65
V8-440 4-bbl 4.32 x 3.75 8.2:1 275 @ 4400 375 @ 3200 45-65

Mopar Chrysler Engine Specifications - MyMopar.com
Click to expand...
318willrun said:
It all comes down to meeting the "right" guy. Over 30 yrs at the drag strip off and on and I've seen built 340's with 4.11 gears choke a mid 14. I also seen next to stock with 3.55's go mid 13's. I think it comes down to if "a guy" knows what to do and if he can tune. I've seen a few "mild" 383's in A-bodies run mid 11's. If somebody can't get a 383 to run, or a 360 for that matter, it's on the owner.
Click to expand...
Yep tuning is very important and driver ability is a subject by itself.
 
318willrun said:
I wouldn't say a joke. I pulled a '89 360 out of my '89 D150, and dropped a smog 400 2bbl in it. Added a 4bbl and headers and it ran 14.5 with 3.21's and a sticky brake caliper that ended my day at the track. Stuck so bad on the start line I was afraid I'd not make it back home. Don't you think 14.5's is respectable in a D150 for a smogger that I didn't even take apart to freshen up? Do I hear a factory '73 340 A-body whinning out there...???? LOL:poke:
Click to expand...

Once you get past a certain bore size, you're gonna have some torque pretty much no matter what.
 
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318willrun said:
For me, I'm not a numbers posted guy. ET slips don't usually lie. Like I say, I love my small block mopars, and I currently have about 9 small blocks and 2 big blocks.
Click to expand...
Gotta show this to the wife. I need more cars!!! lol
 
LO23M8B said:
Gotta show this to the wife. I need more cars!!! lol
Click to expand...
To be fair, 2 small blocks and 1 big block are not in cars. We do have 9 cars, though. All of them pretty much are reliable except one I just bought but not much for show pieces... LOL
 
318willrun said:
To be fair, 2 small blocks and 1 big block are not in cars. We do have 9 cars, though. All of them pretty much are reliable except one I just bought but not much for show pieces... LOL
Click to expand...
you have the potential of 1300 cubes right there. lol
 
well, we got to start comparing somewhere.....This is what they gave us, 'cept the 340 was slightly underrated from many sources, closer to 350HP with only headers added to a ~320HP baseline.. "..On factory claims of 275 horsepower at 5,500 rpm and 340 lb-ft (3,200 rpm), we got 320 horsepower at 5,500 rpm and 368 lb-ft at 3,500 rpm. So it's clear Mopar understated the facts by 45 horsepower and 28 lb-ft. Then we replaced the manifolds with a set of headers and got 352.1 horsepower and 395.9 lb-ft (at 3,200 rpm)—77.1 horsepower and 55.9 lb-ft higher than published peak claims."
https://www.hotrod.com/articles/bad-mopars-340-beat-ford-chevy-shocking-new-data/#:~:text=With the single four-barrel,320.3 horsepower at 5,500 rpm.

Oh and about that 360 smogger motor....."Speculation in the dyno room placed expectations on the stock 360 at around 180 hp. The 360 shattered that assumption, and belted out a solid 266.2 hp at 4300 rpm, and a stout 371.3 ft/lb at 3300 rpm. The lowly 360 had some guts after all...The 360 liked tube headers, with power moving up to 276.9 hp at 4200 rpm, and torque jumping to 390.7 ft/lbs at 3200 rpm...After we bolted on the Edelbrock #1904, (original numbers were from a TQ) we got 276.8 hp at 4500 rpm and 377.1 ft/lbs of torque at 3300 rpm (...and thats with a stock 360 252/.410 cam!.."
Dyno-Test 360 Smog Motor - Mopar Muscle Magazine
 
pishta said:
well, we got to start comparing somewhere.....This is what they gave us, 'cept the 340 was slightly underrated from many sources, closer to 350HP with only headers added to a ~320HP baseline.. "..On factory claims of 275 horsepower at 5,500 rpm and 340 lb-ft (3,200 rpm), we got 320 horsepower at 5,500 rpm and 368 lb-ft at 3,500 rpm. So it's clear Mopar understated the facts by 45 horsepower and 28 lb-ft. Then we replaced the manifolds with a set of headers and got 352.1 horsepower and 395.9 lb-ft (at 3,200 rpm)—77.1 horsepower and 55.9 lb-ft higher than published peak claims."
https://www.hotrod.com/articles/bad-mopars-340-beat-ford-chevy-shocking-new-data/#:~:text=With the single four-barrel,320.3 horsepower at 5,500 rpm.

Oh and about that 360 smogger motor....."Speculation in the dyno room placed expectations on the stock 360 at around 180 hp. The 360 shattered that assumption, and belted out a solid 266.2 hp at 4300 rpm, and a stout 371.3 ft/lb at 3300 rpm. The lowly 360 had some guts after all...The 360 liked tube headers, with power moving up to 276.9 hp at 4200 rpm, and torque jumping to 390.7 ft/lbs at 3200 rpm...After we bolted on the Edelbrock #1904, (original numbers were from a TQ) we got 276.8 hp at 4500 rpm and 377.1 ft/lbs of torque at 3300 rpm (...and thats with a stock 360 252/.410 cam!.."
Dyno-Test 360 Smog Motor - Mopar Muscle Magazine
Click to expand...
This was for insurance at the time because anything with 300HP or more was more $$$. Us old timers remember.
 
pishta said:
well, we got to start comparing somewhere.....This is what they gave us, 'cept the 340 was slightly underrated from many sources, closer to 350HP with only headers added to a ~320HP baseline.. "..On factory claims of 275 horsepower at 5,500 rpm and 340 lb-ft (3,200 rpm), we got 320 horsepower at 5,500 rpm and 368 lb-ft at 3,500 rpm. So it's clear Mopar understated the facts by 45 horsepower and 28 lb-ft. Then we replaced the manifolds with a set of headers and got 352.1 horsepower and 395.9 lb-ft (at 3,200 rpm)—77.1 horsepower and 55.9 lb-ft higher than published peak claims."
https://www.hotrod.com/articles/bad-mopars-340-beat-ford-chevy-shocking-new-data/#:~:text=With the single four-barrel,320.3 horsepower at 5,500 rpm.

Oh and about that 360 smogger motor....."Speculation in the dyno room placed expectations on the stock 360 at around 180 hp. The 360 shattered that assumption, and belted out a solid 266.2 hp at 4300 rpm, and a stout 371.3 ft/lb at 3300 rpm. The lowly 360 had some guts after all...The 360 liked tube headers, with power moving up to 276.9 hp at 4200 rpm, and torque jumping to 390.7 ft/lbs at 3200 rpm...After we bolted on the Edelbrock #1904, (original numbers were from a TQ) we got 276.8 hp at 4500 rpm and 377.1 ft/lbs of torque at 3300 rpm (...and thats with a stock 360 252/.410 cam!.."
Dyno-Test 360 Smog Motor - Mopar Muscle Magazine
Click to expand...
Somebody give me a 360 2bbl and a 383/400 2bbl and I'll test in my pickup, ET proven.
 
LO23M8B said:
This was for insurance at the time because anything with 300HP or more was more $$$. Us old timers remember.
Click to expand...

So that's what it was. I figgered it was for the smog goomers. Always thought it was odd that my Dad's F100 with the "165horse" 390 would smoke those L70s for half a block :lol:
 
RustyRatRod said:
Why limit it to two barrel since there were four barrel versions of both?
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well, just say'n, usually the 4bbl versions are more expensive. Shoot, I'll take a E58 and a Commando if somebody wants to cough 'em up! LOL :D
 
Having built both 340 and 383 A-bodies (pretty much stock) and reading old road tests, there is really very little difference in performance between the two in similar cars. I've only owned two 360s, one in a '79 3/4ton club cab, long bed Power Wagon. It could pull a stump (did that once), but it was NOT quick for obvious reasons. The other is the Magnum in my 2000 Durango (4,500 lbs.). The 5.9 Magnum FEELS a lot like the 340 in power even if it is pulling an extra 1,000 lbs.

There is a reason for going big block, but with a 383 it becomes just preference. Now, a 440 is a completely different story...
 
LO23M8B said:
By the way I owned/raced a lot of mopars but you can't compare a low comp. 360 to a high comp 383. You have to compare apples to apples. Like a high comp 340 to a high comp 383 or a 360 with flat tops. The biggest problem with the BB was a lot of them were .100 to .125 in the hole so they were really low compression. I used to put closed chamber heads and thin steel gaskets on them with a ssh25 cam on the automatics and a street hemi convertor. Really woke them up. Like 13.50's thru stock mufflers. Hookers of course. In reality on the street a 340 would whip a 383 every time. Apple to apple of course.
Click to expand...

Which is why I said compare apples to apples. Compare the highest factory rated HP of the 383 and 360. See who comes out on top.
 
318willrun said:
well, just say'n, usually the 4bbl versions are more expensive. Shoot, I'll take a E58 and a Commando if somebody wants to cough 'em up! LOL :D
Click to expand...

Make it real comparison like I said. Blueprint up the most powerful factory offered 383 and 360 and let um shoot it out. That's the only fair way. Anything else is just "how you want it" so your favorite choice will win.
 
RustyRatRod said:
Make it real comparison like I said. Blueprint up the most powerful factory offered 383 and 360 and let um shoot it out. That's the only fair way. Anything else is just "how you want it" so your favorite choice will win.
Click to expand...

AND MAKE THEM THE SAME WEIGHT , GEARING , TIRE SIZE ,ETC.
 
I worked with a guy that bought a 68? 383 Road Runner 4 speed and tuned it and raced it for years. Said he would break into the high 12's every once in a while. He had the heads milled, richened up the stock carb, put headers on, and had a set of drag race gears. Not a BSer. 340's and low compression 360's are not the same.
 
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