B vs RB

[RC Moser]

I've read about the difference and I think got good understanding, but I had 1966 belevdere 2 with g code commando 383 with 4 barrel carter carb. 1966 IMO was confusing year for 383. IMO the only way to tell would be verify the stroke. 3.338 B, and 3.75 RB. I also think any 383 before 66 would be B series. IMO any after 67 would be RB due to 440 come out in 66 and was created from the RB block. IMO all 383s after 67 were RBs, but I have found no way of knowing that. I do know all Road Runners and Super Bee engines were RB high preformance 383s with 3. 75 stokes. I do know all 361s 1966 (look just like 383s) were two barrel engines. Does that mean all two barrel 383s were actually 361?

I find it really confusing to tell 1966 383 was B or RB block without verification of the stroke?

Anybody else know any other differences, like castings on the block that would fornsure identify RB 383?

 

[toolmanmike]

Nope. 383's were always B blocks. (along with 361's and 400"s) 413's, 426 wedge, and 440 were RB's (raised blocks) There are a few other B and RB engines built in the early 60's I didn't mention.

 

[Johnny Mac]

I beg to differ there was 100 percent a short run RB 383.

 

[xLURKxDOGx]

I beg to differ there was 100 percent a short run RB 383.

Do tell..........

Jake

 

[Johnny Mac]

Do tell..........

Jake

Mopar (Chrysler, Dodge, Plymouth) RB series V8 engines: 383, 413, 440, and 426

 

[Johnny Mac]

I guess tool man did state he isn't mentioning early 60's...so in a way we are both right, but I knew the 383 RB existed from years of writing vehicle application data.

 

[RC Moser]

68 thru 73? HP 383s were all RB due to the 3. 375 stroke. That's way I understand it. If it's got 3.375 stroke in 383 it was RB?

 

[Johnny Mac]

68 thru 73? HP 383s were all RB due to the 3. 375 stroke. That's way I understand it. If it's got 3.375 stroke in 383 it was RB?

To quote allpar in the article I posted...
"The 383 cubic inch RB engine was only available in 1959-1960 on the US built Chrysler Windsor and Saratoga"

So it's rare you will ever even see a 383 rb and for sure dead by 1960

Little known fact a "chrysler 350" exists also in the B deck lol

 

[baracus]

Just think of all 383 and 400 as b engines. 413, 426, 440 as rb. There are a few exceptions but not really common.

 

[toolmanmike]

68 thru 73? HP 383s were all RB due to the 3. 375 stroke. That's way I understand it. If it's got 3.375 stroke in 383 it was RB?

The RB's stroke was 3.75"
And:
383

RB 383 "Golden Lion" engine in a 1959 Windsor
Not to be confused with the 383 B engine, the 383 RB had a 4 1⁄32-inch (102.4 mm) bore (with the long stroke of 3.75) for a displacement of 382.9 cubic inches (6,275 cc). It was only available in 1959 and 1960 on the US-built Chrysler Windsors and Saratogas; one of Trenton Engine's lines had been converted to the new RB engine (to make the 413), and demand for the 383 B engine was too high for the remaining line. The solution was to create a 383 RB to fill the gap until the plant figured out how to quickly switch from one block to the other.

 

[RC Moser]

Wow, was I confused. So all 383s after 61 were B engines? Thanks for the information. If I ever build my HS car (66 belvedere) I'll have correct information. For last question we're all 361s after 65 two barrel engines. Reason I ask is 361 and 383 look exactly the same for what I remember?

 

[oldmopardude]

they look the same, simply look at the casting number on the side of the block. 361 and 383 have different numbers.

 

[383Scampman]

As a visual aid in determining the difference between a 361 and a 383 : there is a stamping next to the dizzy . On a 361, it will be stamped "361" or "36" followed by the date code . On a 383 , it will be stamped "383" or "38" followed by the date code . Also, following the stamped number there should be stamped a letter "R" or "P" . The "R" stands for regular fuel or 2 bbl. carb. while the "P" stands for premium fuel or 4bbl carb . ALMOST everything can be exchanged from a 361 to a 383 and visa-versa except the pistons .

 

[RC Moser]

Thanks 383S, that's exactly what I was looking to find out? Now I know. Thanks again from all that posted, now I straight on B vs RB and how to tell difference between 361 and 383.