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400 block, stoker kit ,make 500 cci,
street/race, lighter block, be had cheap,
set rpm heads, mid to low 11s, could be able run in the 10 without whole lot work,
jmo

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Thats a seriously cool set up but you are talking what,, 8 to 10 grand to buid it right???

And the OP wants 500 hp from his motor which will be a whole lot easier to achieve from the 440 than the 383 and cheaper too..IMO...

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Some humorous replies here.
(which HAS to be pretty accurate because of the way the gov't makes car companies validate their vehicles)...

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Speaking of funny replies. You are kidding right.

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I'm sure there will be some out there.
There's one at our track, its a tough little motor....

440s are just plain fun to beat. I kind of enjoyed roasting my buddies 69 440 cuda this weekend. Not by alot, mind you, but the #'s don't lie.

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I'm sure there will be some out there.
There's one at our track, its a tough little motor....

440s are just plain fun to beat. I kind of enjoyed roasting my buddies 69 440 cuda this weekend. Not by alot, mind you, but the #'s don't lie.

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and how much more do you have in your 383? What is the rest of the set-up? yours and his? apples and oranges. Nothing better than putting a Small block talker on the trailer w/ his "giant killer"

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Flat tappet cams, alum heads (within few cfm, same bench) same pistons, same carb, ......
He has glass frontend, no aprons, little car. Mine is all factory steel, at least 400 lbs more. I found some issues with mine too, I'm barely getting 3rd gear with my bigger tires. It goes thru at 5900~ 6000, and I only make power between 6 and 7. I mean it bogs at 5 grand on gear change. I think a 5.13 should be in order.

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Nothing better than putting a Small block talker on the trailer w/ his "giant killer"

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Funny thing is, its smaller than most small blocks these days... Its in its "own class"
I believe the fastest 383 cuda stocker was Dave Wrens at 9.70.

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Nothing better than putting a Small block talker on the trailer w/ his "giant killer"

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Funny thing is, its smaller than most small blocks these days... Its in its "own class"
I believe the fastest 383 cuda stocker was Dave Wrens at 9.70.

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Some humorous replies here.
(which HAS to be pretty accurate because of the way the gov't makes car companies validate their vehicles)...

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Speaking of funny replies. You are kidding right.

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No...it's actually alot of work to certify a car in the real world. I work for an OEM and am somewhat familiar with that activity. I know what we do in the dyno rooms as well. It is really unbelieveable to what length your data has to be accurate, for alot of reasons.
Maybe my response sounded like I was dependant on the gov't but that needs clarified. The OEM has to be very accurate with their data so a statement like 'it's hp was overrated intentionally' is somewhat unbelieveable to me because of the ramifications against the OEM from class actions etc

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That was then and this is now. Back in the '60's, it was common to underrate motors for a variety of reasons including corporate rules, insurance, etc. There are dozens of examples.

....that is unless you believe a 455 Stage I Buick really only had 360hp or a 455 W30 had 5hp over the base 442 engine, or an L88 427 only had 5hp over an L72 or a 428SCJ really only had the same hp as a 383, or......well you get the point (or I hope you do, anyway! )

Dave

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Some humorous replies here.
(which HAS to be pretty accurate because of the way the gov't makes car companies validate their vehicles)...

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Speaking of funny replies. You are kidding right.

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No...it's actually alot of work to certify a car in the real world. I work for an OEM and am somewhat familiar with that activity. I know what we do in the dyno rooms as well. It is really unbelieveable to what length your data has to be accurate, for alot of reasons.
Maybe my response sounded like I was dependant on the gov't but that needs clarified. The OEM has to be very accurate with their data so a statement like 'it's hp was overrated intentionally' is somewhat unbelieveable to me because of the ramifications against the OEM from class actions etc

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That was then and this is now. Back in the '60's, it was common to underrate motors for a variety of reasons including corporate rules, insurance, etc. There are dozens of examples.

....that is unless you believe a 455 Stage I Buick really only had 360hp or a 455 W30 had 5hp over the base 442 engine, or an L88 427 only had 5hp over an L72 or a 428SCJ really only had the same hp as a 383, or......well you get the point (or I hope you do, anyway! )

Dave

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I am not that familiar with those motors or ratings as I have been absorbed in Chrysler products for 30 years so I will take your word that those ratings may seem suspicious. What I do understand is that alot of stories about how OEM's work vs actual situations is also inflated greatly, whether then or now. I have heard alot about ratings inflated and deflated but I have also seen dyno reports showing those very engines to be awful darn close to advertised. Since I am a data driven individual, I am usually forced to be somewhat skeptical until I see some provided to lend credence to that disparity. Again, I am not trying to be a jerk, and your opinion is valued...I just tend to want to see supporting info if someone feels the factory rating was disingenuous. Thanks for the input.

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Clearly both "can tear up the streets." But he's not building a vehicle around a motor (which is irrelavent anyway), so forget about body weight and all the other speculative responses. Yeah, sure there are plenty of well built 383's that can beat up on lesser built 440's. But as said above, with COMPARABLY BUILT MOTORS, a 440 will always out perform its little brother...the 383. No?

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Sure it would! Equal parts, tuning and SAME chassis and a 57 cube advantage - VERY unfair, but an advantage. For sake of equality, trade off
57 cubes for 570 pounds LESS total car weight w/383 and the comparison just got a lot closer!! 440's are better to put into a mid to HEAVY chassis due to the torque they produce.

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Why does your 383 car get to weigh 570 pounds less? Maybe a 225 slant 6 in a 1700 pound roadster would be better? 383s typically get better fuel economy than 440s. If that is important to you, then maybe a 383 makes sense. People have their preferences for a variety of reasons; underdog status, sentimental value, nostalgia, etc. Looking at it practically, if the choice is between two engines within the same family (yeah i know, ones a B and the other is an RB) the one with 57 more cubes offers much more bang for the buck. It may take a lot of money spent on that 383 to make up for its displacement disadvantage. The old adage goes " The only substitute for cubic inches is cubic dollars or light weight".

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I am not that familiar with those motors or ratings as I have been absorbed in Chrysler products for 30 years so I will take your word that those ratings may seem suspicious.

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Thanks! I could come up with a dozen other examples off the top of my head as incorrect ratings were VERY common during the musclecar era.

For example; a 370hp RAIV having only 4hp more than a 366hp RAIII, the fact that the RAII was rated at less hp in a firebird than it was in a GTO. There are several corvette engines rated higher than the IDENTICAL engines in other cars (450hp '66 L72's, 425hp 396 L78's). Many fullsize cars recieved higher HP ratings for the same engines such as the W34 Toronado's 400hp vs. the W30 442's identical engine at 370hp......I could go on.....

....as far as Chrysler products go; any thoughts on why a 426 crate engine with less compression is rated at 465hp compared to the street hemi's 425hp? Why can a Hemi run or beat a 450hp LS6 Chevelle?

GM had a corporate rule about not having a rating of more than 1 hp per 10 lbs of car; the corvette was exempt and for some reason they threw that out the window in 1970 with the Chevelle although Buick, Pontiac and Oldsmobile still toed the line with ratings all under 400hp despite having very similar performance to the Chevelle.

Dave

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Clearly both "can tear up the streets." But he's not building a vehicle around a motor (which is irrelavent anyway), so forget about body weight and all the other speculative responses. Yeah, sure there are plenty of well built 383's that can beat up on lesser built 440's. But as said above, with COMPARABLY BUILT MOTORS, a 440 will always out perform its little brother...the 383. No?

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Sure it would! Equal parts, tuning and SAME chassis and a 57 cube advantage - VERY unfair, but an advantage. For sake of equality, trade off
57 cubes for 570 pounds LESS total car weight w/383 and the comparison just got a lot closer!! 440's are better to put into a mid to HEAVY chassis due to the torque they produce.

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Why does your 383 car get to weigh 570 pounds less? Maybe a 225 slant 6 in a 1700 pound roadster would be better? 383s typically get better fuel economy than 440s. If that is important to you, then maybe a 383 makes sense. People have their preferences for a variety of reasons; underdog status, sentimental value, nostalgia, etc. Looking at it practically, if the choice is between two engines within the same family (yeah i know, ones a B and the other is an RB) the one with 57 more cubes offers much more bang for the buck. It may take a lot of money spent on that 383 to make up for its displacement disadvantage. The old adage goes " The only substitute for cubic inches is cubic dollars or light weight".

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Thanks for your post. It's what I have been saying all along. 440's are cheaper to build, but not neccessarily the better motor. ANY
motor can be made to run WELL, it's just a matter of preference and how much money you're willing to SPEND, as well as the chassis it's going in. FWIW, 383's have very little low end torque to move an average B-body as well as 440 would, hence the 383 NEEDS gears and some weight trimming to equal the performance. Smaller motors -lighter weighted cars, for example: 340 Dusters, Demons, Swingers and Darts.