RV 440?

[daytona kid]

Bought this 440 block the other day, $250 for it and a 727. Here are pics of the numbers on it. Are these typical numbers for winnebago 440s? And looks like it was built in 1975 ?

 

[Bad B-rad]

I also just bought a 1973 Winnebago!!!
These are ones I can find in my book:

5= 1975
T= Trenton engine plant
440=440CI
E=Cast crank
8=Aug
25=25th

 

[Bad B-rad]

That 8/25 is assembly date,
Casting date is on side of block.
5/28/75 I think it reads.
then the 4006630-440-2 is on all 75-78 440RB
The "2" after the 440 I am not sure, it MAY be 2nd shift, someone may chime in with more info.

 

[Bad B-rad]

If the 727 came from the Winnebago, it should have a short shaft, Maybe with drum on end of it and be the heavy built one, perhaps with 4 pinion planetary.
#'s for that 727 on side of trans pan rail.

 

[Bad B-rad]

Anyone know what camshaft was installed from the factory in these engines??1973-78 4bbl smog 440's)

 

[wyrmrider]

same as passanger car
long slow closing ramps and wide lca closes intake late reducing dynamic compression which combined with low mechanical compression kills torque and produces extreme EGT
Factory had to go to small converter to get them off the line, also same as passanger cars
Piston change to quench dome and a shorter set duration cam- (with more area) can drop EGT by 800 degrees
Exhaust also closws late to give an EGR effect

 

[Bad B-rad]

What were the specs on that cam?
I can only find cam info on 66--71 engines.
I am just curious to what it was they used, was it the same as the 67-71 2bbl 383/400 cam?

 

[beanhead]

What were the specs on that cam?
I can only find cam info on 66--71 engines.
I am just curious to what it was they used, was it the same as the 67-71 2bbl 383/400 cam?

Here is some discussion we had awhile back,
https://www.forbbodiesonly.com/moparforum/threads/440-rv-cam-specs.163412/#post-911121320

 

[wyrmrider]

specs on the early cams get murky
FSM will show all as 260 cams
but lift changed somewhere in the late 60's (when they went to a "smog cam" most likely 68
the late cam is sold as the HP cam for the earlier engines - but it's not exact
I can't get to my notes right now
in 73 and later and maybe earlier 400 2bbl and standard 440 had
260/268 .434/.430 IO 18 !C 62 EO 66 EC 20 ovlp 38
that's at about .008
for .006 lets add 3 degrees to the open and 5 to the close on the intake
would be more on the exhaust
268/276 21 BTDC 67 ABDC 69 BBDC 25 ATDC 46 ovlp was about 206 @.050

for comparison the early dc 260 "single pattern cam" (not exactly lobes are different
DC 260 measured 261 @.008 but it's 269 @.006 if you want to compare with comp, lunati,
[email protected] 269 @.006 [email protected] 212 @.050 115@200 42@275
430 (34 ovlp) 113LCA “DC260-113 110icl

want to compare the DC 260 to a Crane, Cam Dynamics, Summit or White Box cam it measures 284 @.004 (.006 at the Valve SAE method)

431/430 DC 260 212.3 211.9 113 lca 109 Icl/117excl -2.8 34.6 43.1 -10.8 -13.6 olap @.050 Mopar DC 260
434/430 (260/268) 206/209 113 lca 110ICL/116excl -7 __33 ___40 -11 __ -18 olap @.050 stock440

later MP 260 was dual pattern
430/450 {260/268 advertised .008) 221/[email protected] 110LCA

 

[Bad B-rad]

If stock heads are about 88cc, what would 80 cc cylinder heads help bring the CR up to?

It looks to be aprox 1/2 a point

 

[wyrmrider]

yep but your gasket will be thicker than stock
thinest now is mr gasket .028
pistons are still way down the hole so no quench

 

[Nate S]

Does it have motor home heads? Angled plugs? Cam will be a three bolt, chain will be a double roller. Pretty much good for the bottom end. Tranny will be good but only for parts unless you have a Winnebago or extra mainshaft and tailhousing.

 

[Bad B-rad]

I am just educating myself right now, I just bought the 1973 Winnebago, I dont have it home yet.
My 69 is #'s matching 383, and runs great, so I really have no clue what I am gonna do with the 440 yet.
I have a 5.7 Hemi, waiting for a cam, I was gonna put in my 77 Stepside, midnight express clone, but maybe the 440 will go in that.

I do have 2 sets of Mopar steel shim .020 gaskets in the package still, so if I was gonna cut iron heads I would have them to use.
I have reservations about cutting the heads, only because once heads are cut, wont I will have to cut intake, or intake side of head??
And will I need custom push rods?
Also how much is recommended to cut off?
Again, I am just asking questions, I dont have the 440 home yet, it may need an overbore, and that would throw the "CHEAP" thing out the window.


With the Winnebago trans, could I take my 4x4 small block 727(in my step side), and mix the tail end parts with the Winnebago big block 727 to convert it for use in the 4x4??
I have never had a small block 727 apart before, and again, if this can not be done, then that also is a factor to it going in my truck.


I have found a bunch of very useful threads on the subject here!!

 

[beanhead]

Does it have motor home heads? Angled plugs? Cam will be a three bolt, chain will be a double roller. Pretty much good for the bottom end. Tranny will be good but only for parts unless you have a Winnebago or extra mainshaft and tailhousing.

My untouched '78 RV 440 had a single-bolt cam and single chain. The '73 RV block used for my last build was the same except it had a forged crankshaft and 'six-pack' rods. The '78 has a cast crank and LY's. I wasn't aware Chrysler ever used three-bolt cams in these?

 

[Bad B-rad]

Cost wise, if the trans can be converted, and the 440 is running good, it may be cheaper to toss it in the truck, then the Hemi.
Next thing to consider is the rear end and front end, they are stock Chrysler, I am not sure what they are, but I know the rear, IS NOT a Dana. Hopeful it wont be an issue, and the 440 wont tear them up.
I do have a Dana 60 rear for the truck, but gear ratio differs from current set up, so I would have to spend money, on front diff, or rear ring and pinion.

Not sure what the current oil pan is in the Winnebago, but I do have 2 truck oil pans from previous truck to car 440/400 swaps, but they were 2WD, not 4x4, if that matters ???.
I am building the truck as a "Rad Rod" work truck, so MAX HP, is not goal, torque,(hauling towing) and reliability and cost would be king on this project

 

[Bad B-rad]

My untouched '78 RV 440 had a single-bolt cam and single chain. The '73 RV block used for my last build was the same except it had a forged crankshaft and 'six-pack' rods. The '78 has a cast crank and LY's. I wasn't aware Chrysler ever used three-bolt cams in these?

Hey Beanhead, did your 73 have motorhome heads?
I have never come across "motorhome" heads, what is the difference?
I know some motorhomes had extra holes drilled into water jackets on the deck, but that is about all I know on motorhome engines.

 

[Nate S]

Clearly a lot of variation here. I just took apart a year-unknown 413 from a Winnebago. Tranny was post ‘75 with the front planetary splines at the lower angle. 4-pinion though. Had the awful motorhome heads. Forged crank, that super deep harmonic balancer. Block casting date ‘72. Had a 3 bolt double roller cam.

Apparently it overheated and seized on the highway. 3 of the ly rods were bent. Other than that it was super clean inside. Rockers looked like brand new.

 

[Nate S]

Hey Beanhead, did your 73 have motorhome heads?
I have never come across "motorhome" heads, what is the difference?
I know some motorhomes had extra holes drilled into water jackets on the deck, but that is about all I know on motorhome engines.

The motorhome heads are a taller closed chamber head with smaller intake and exhaust valves. Exhaust are sodium filled. Plugs are angled. Water pump mounts to the front of the heads and flows through a port on the front of them. Pushrods are 3/4” longer. Exhaust ports are different. Oh, and they weigh a freaking ton.

 

[Bad B-rad]

That is one mistake I have made, I didn't verify it was a 440, and not a 413!!

Animals have moved in to the R/V and it is very stinky.
Good thing is the guy who I bought it from, has the exhaust pipes plugged and air intake plugged to stop critters from making a home in there.
He used the Winnebago to tow his race car, and he is a Mopar guy, so I took his word.
He is a very nice guy, but I really should have checked for myself, as I would have far less use for a 413.

So the Motor home heads are mainly for improved cooling, and durability, I would assume?

 

[Bad B-rad]

Just found this, but have not found the complete article:
https://www.hotrod.com/articles/440-winnebago-dyno-tuned-westech-performance/



I guess I am about to spend the 2 bucks a month, I thought maybe I could watch thru my cable subscription.