What does the RB stand for when talking about a 440 RB?

[all4rocks]

just as the question asks.

[anlauto]

Real Big

Actually "Raised Block"....It stands taller then the 383 or 400

[all4rocks]

Are all 440's "raised blocks"?

[anlauto]

YES

[tommyg29]

want to be more confused, read up on HP blocks 

[dusty]

YES

You deserve it anlauto. That car you built is beeeyoutiful!

[acudanut]

Real Big

Actually "Raised Block"....It stands taller then the 383 or 400

Yes. All 413, 426 wedge and 440's are RB blocks. They all can use the same intake manifolds.

[06Daytona]

LA= Little A$$
B= Big
RB=Really Big

[GreenFish]

I suppose this could be somewhat debatable.

While I agree that the "R" likely stands for "Raised" does "B" really stand for "Block"? If that was the case then is the 383 just a "block"? and what about the "A" engine?  What does that stand for?

There was an "A" block and a "B" block at one time.  Then Chrysler raised the deck of the "B" block and called it an "RB" block. So technically you are all right "R" stands for raised but the "B" is just the designation for the block, doesn't necessarily stand for "Block"

[KFD]

Okay, your breakdown is like this...

"A" block... Poly. Dodge/Desoto 270/315/325 Plymouth 318/326. Dodge Polys are closely related to early hemis, in the case of the 315/325 some actually had hemi heads! Polys have the distinctive scalloped covers. While the DeDodgo and Plymouth Polys are both "a" blocks, not much interchanges.

"LA" or "Late A" shares little with the early "a", cam gear sprocket and lifter bore size.

"B" block. This was developed by Plymouth in the fifties, No plymouths had hemis then. Starting in 1958, the 350 and 361 debuted.

"Raised B" debuted in 1959 with the 383 and 413 to replace the 392. The 383 was dropped, and 426 added to the lineup.

I think in '66 or '67 the "b" block 361 was bored to 383. This was NOT the same animal as the earlier RB 383- the two motors have different bores and strokes.
KFD

[hemiken]

To clear it all up for you guys, here it is straight from ME.

A = Small block = Allright

B = 383-400 Big Block = Badass

RB = 426-440 Bigger Block = Really Badass


                                                                                                                  i love it.

[ozrt4406]

To clear it all up for you guys, here it is straight from ME.

A = Small block = Allright

B = 383-400 Big Block = Badass

RB = 426-440 Bigger Block = Really Badass


and the mighty slanty Kenny??................really really really badasss....

                                                                                                                  i love it.

[MEK-Dangerfield]

Let's keep it simple.

B = Big

RB = Really Big


             

[cudazappa]

"A" block... Poly. Dodge/Desoto 270/315/325 Plymouth 318/326. Dodge Polys are closely related to early hemis, in the case of the 315/325 some actually had hemi heads! Polys have the distinctive scalloped covers. While the DeDodgo and Plymouth Polys are both "a" blocks, not much interchanges.

"LA" or "Late A" shares little with the early "a", cam gear sprocket and lifter bore size.

"B" block. This was developed by Plymouth in the fifties, No plymouths had hemis then. Starting in 1958, the 350 and 361 debuted.

"Raised B" debuted in 1959 with the 383 and 413 to replace the 392. The 383 was dropped, and 426 added to the lineup.

I think in '66 or '67 the "b" block 361 was bored to 383. This was NOT the same animal as the earlier RB 383- the two motors have different bores and strokes.
KFD

Just a couple notes: LA as I remember in my books is for Lightweight A
G - is 170 slant six
RG (raised G block) is the 198/225 slant six.