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Old 05-01-2011, 12:28 AM
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rv 440

i got this 77 rv thats got a good runing 440 low miles would this motor be worth building

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Old 05-01-2011, 07:11 AM
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Hell yes, it's a 440 Mopar, just need the right parts and you'll have a real stump puller. Make sure the package you put together matches the application the engine is intended for. Google 440 Mopar and you'll find lots of performance info.
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Old 05-01-2011, 07:25 AM
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Quote:
Originally Posted by 87fubar
i got this 77 rv thats got a good runing 440 low miles would this motor be worth building
I can see it now. RV on the starting line with a set of top fuel drag slicks on it.
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Old 05-01-2011, 08:49 AM
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there are some differences between the passeneger car engine and the motorhome engine
The pass engine is a "B" engine
The motorhome engine is an "RB" engine.
I think the difference is the deck height on the RB is higher thus the rods are a longer length. I think that is why they label it "B" or "RB" RB being "raised block"
Rod length - stroke/ ratio is different as a result.

This site explains it http://www.wallaceracing.com/enginetheory.htm
Rod to stroke ratio is explained as well as safety factor and a lot of other good stuff
Even though it is a pontiac site, all theorys apply
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Old 05-01-2011, 01:31 PM
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only reson i got the rv was for the 440 an have ben try'n to find a good 2door mopar to build it for
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Old 05-01-2011, 02:34 PM
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Quote:
Originally Posted by latech
there are some differences between the passeneger car engine and the motorhome engine
The pass engine is a "B" engine
The motorhome engine is an "RB" engine.
I think the difference is the deck height on the RB is higher thus the rods are a longer length. I think that is why they label it "B" or "RB" RB being "raised block".....
WRONG!!! All 440s were "RB" engines. The "B" engines were the 350 (one year only '58 I think), 361, 383, and 400. "RB"engines included the 413, 426 (wedge), and 440. Although there are some differences in the motor-home version and the automotive version a motor-home 440 can be converted for automotive use fairly easily.

Don't understand why you would reference a Pontiac web site when the question was about a MOPAR.

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Old 05-01-2011, 02:45 PM
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Quote:
Originally Posted by Centerline
WRONG!!! All 440s were "RB" engines. The "B" engines were the 350 (one year only '58 I think), 361, 383, and 400. "RB"engines included the 413, 426 (wedge), and 440. Although there are some differences in the motor-home version and the automotive version a motor-home 440 can be converted for automotive use fairly easily.

Don't understand why you would reference a Pontiac web site when the question was about a MOPAR.

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I referenced the pontiac website only for reference to basic engine theory as I thought that block deck height was different, hence rod to stroke ratio would be different. As far as B or RB I stand corrected.
I was hoping someone would chime in as its tough for anyone to get an answer here unless its about a chevrolet.
You dont have to yell, and john wayne is dead.Life is harder when youre dead.Latech
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Old 05-01-2011, 02:56 PM
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Dude could have looked this up himself.

http://en.wikipedia.org/wiki/Chrysler_B_engine

Looks to me that is says an RB is a Raised block version of the B engine.Although it doesnt seem to matter... be it in a motorhome or the old mans cop car.
Kinda what I thought , but then I am just a pontiac guy with no clue.
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Old 05-01-2011, 03:47 PM
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Quote:
Originally Posted by latech
....Kinda what I thought , but then I am just a pontiac guy with no clue.
Touche! That's why I don't try to answer Pontiac questions. My knowledge is definitely limited when it comes to Pontiacs.

You are correct in that the "RB" engines are raised block "B" engines. All the raised block engines share the same stroke but different bores. Same thing holds true for the "B" engines. Most other internal parts with the exception of connecting rods are interchangeable as are the heads. The difference in deck height between the two does make intake manifolds unique to each. A "B" intake won't fit an "RB" block without adapters and an "RB" intake won't fit a "B" engine without major modifications. The max wedge engines had unique heads and required a unique intake and 4 bolt valve covers. Its not hard to get close to 500 streetable and reliable HP out of a 440 or a stroked 383 (451 cu. in.) with gobs of torque.

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Old 05-01-2011, 04:25 PM
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That makes good sense. I was confused with the B and RB label...clearly.
As I am not too familiar with mopars I was under the impression that a 440 could be either a B or RB. My mistake.I havent seen a BB chrysler in years.
Was 1978 the last year they were made..?
I wrench on all the new stuff, Kinda makes you "dumb" to what was back then . I tell you I love it and I hate it.
My old man had a 72 polara when I was a kid in high school. It was an Ex lake county sheriff car. That thing was an animal.It was a 440 car.
The wallace Pontiac site is for pontiacs, but the engine theory article is applicable to all engines, wich is why I posted it for the OP, as I was confused about a 440 being offered as a B or RB engine or both.
Clearly my mistake there. Just trying to keep the ball rolling.

Last edited by latech; 05-01-2011 at 04:31 PM.
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Old 05-01-2011, 07:04 PM
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1978 was the last year of production for the "RB" 440 and the "B" 400. Had something to do with an agreement between Iaccoca and his lenders. Don't know the specifics though. At any rate the 440 could be found in motorhomes and some commercial vehicles for a couple years after '78. Basically they just used up their stock of big blocks till they were gone.

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Old 05-01-2011, 07:10 PM
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what all would i have to change on this thing to get decent amount of power out of it.before i start throwin $$$ at it
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Old 05-01-2011, 07:37 PM
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I check classified ads for RVs for that very reason. Never bought one, I need a roadrunner first
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Old 05-01-2011, 08:14 PM
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ya i couldnt pass up a free 440 plus extra trans that came with the rv and i was able to drive it home havent fully figured out what 2door car i want yet
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Old 05-01-2011, 08:29 PM
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Not totally versed in the RV version but probably at a minimum you would want a better set of heads, cam and intake and exhaust manifolds. Probably some differences in front brackets as well. Basically if it was me... 452 casting heads, Mopar Performance intake, purple cam and lifters, decent AFB with long tube headers and a Mopar electronic distributor and ignition (orange box). Probably take a look at a general rebuild and upgrade the pistons to around 9.5-10.1 compression. All that will get you a pretty reliable 450 hp.

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