383 vs 440 exhaust sound

[Cojohnso1]

Whats weird for me? Is the 383 cars Ive had were auto trans. 440s 4 speeds. And that dictates a lot of performance differences. (Assuming both are close to stock configs) But typically? I found the B-blocks to rev and rap a bit faster to their respected peak power bands than 440 RB. But of course 440 had bigger torque thump off line. And would rundown 383 due to it's bigger cubes if given enough space. It's why Im a BIG believer in the best of both worlds? B-block with 3.75" RB crank! A bored 440 (.060 over) to 451 is really no match for the classic B-block stroker 451. (400 block bored .035 over)

 

[1 Wild R/T]

Sounds like the 383 has more cam & he short shifted it... 383's don't make torque like a 440 and the extra cam duration only kills low end torque that much more.... So at least make use of the RPM's the cam is designed for..

383's like to spin a little.... Sounded like it shifts below 5K, my 383 is happy to spin 6k & I've run it clear up to 6500 without any problems...

 

[Nate S]

About the difference I’d expect when all else is equal. Nice sounds!

As an interesting side note, I did a similar swap, 361 - 426, same cam, manifolds etc. I had fought drone with the 361, eventually got it tolerable, then put in the 426 and it was almost completely gone.

 

[Hikin Mike]

The guy who posted that video is German. It appears from translating the initial comments on the video from German to English that this was a before and after engine swap.

Not sure about the German part but he mentioned it's the same car, just a year later with a bigger motor.

 

[mopar 3 B]

Sounds like the 383 has more cam & he short shifted it... 383's don't make torque like a 440 and the extra cam duration only kills low end torque that much more.... So at least make use of the RPM's the cam is designed for..

383's like to spin a little.... Sounded like it shifts below 5K, my 383 is happy to spin 6k & I've run it clear up to 6500 without any problems...

6500 is a pretty safe spot. I have one at 5800 and one that will do 6800. One at one time that would exceed the 8000 tach but would not idle under 1200. That one would not keep up with a similar RB build in the 1820 but given time and space would pass most. Many a Chevy owners in the day hatted that car.

 

[Budnicks]

both sound pretty mild

the org. stock 383 RR camshaft is a tad
bucket Tee, bucket Tee, bucket Tee, sounding
more so then the same cam in a 440cid

I always liked that sound of the OE 68-70 RR 383 camshaft
good exhaust note for stock

still good sound though, either engine

 

[mopar 3 B]

both sound pretty mild

the org. stock 383 RR camshaft is a tad
bucket Tee, bucket Tee, bucket Tee, sounding
more so then the same cam in a 440cid

I always liked that sound of the OE 68-70 RR 383 camshaft
good exhaust note for stock

still good sound though, either engine

Funny but I think the cam has the same spec's 440 or 383 in HP versions till they get to the 6 pack. The sound you are referring to could be compression differences.

 

[1 Wild R/T]

Funny but I think the cam has the same spec's 440 or 383 in HP versions till they get to the 6 pack. The sound you are referring to could be compression differences.

The 383 Magnum/Commando 440 Magnum/Super Commando & 440 Sixpack/Six Barrel all have the same lift/duration/over lap.... The 440 Sixpack/Six Barrel cam lobes have a low taper & the lifters are low crown, this increases surface contact to help prevent cam failure due. to the higher spring pressures used on the Sixpack....

Picture came from the Direct Connection Racing Bible...