Wow Lou ... it sounds like you are well into the project. Just where
are you exactly in the completeing it ? .. Your alum head
consideration ?.... and saying they might "move around" ?? ... I
think that those would give MOVING AROUND new meaning on high-load
motorhome application !!

Something though you did overlook. The 413 block is a much better
piece than a 440. The later 413 was built for HD use...and has
thicker cyl walls and beefier bottom-end. The 440 block is nothing
more than a passenger car piece with premium parts.

Eric


--- In FMCMotorCoach@yahoogroups.com, "Louis Cruse" <xjetmec@...>
wrote:
>
> Eric, it gets pretty hot here in Aridzona. The FMC 440 has the high
> exhaust manifolds that burn the valve covers and the oil inside and
> other things. I am not convinced the FMC fan/shoud/radiator is an
> adequate design. Having to remove the fan and pulleys to change PS
or
> AC/Gen belts is just not something I will accept. Headers burn out,
> aluminum heads run hot and move around. Harry Day's #400 has
> addressed the exhaust manifold heating, but I came about a
different
> solution in a set of #3830247 exhaust manifolds with very nice
> sparkplug heat shields that were made to run the plug wires over
the
> top of the valve covers, that I was going to use. I've added a pic
of
> one of those manifolds to the #120 Photos herein. However, I kept
> thinking of Wayne Jacoby's #536 that is HT413 powered. What to do ?
>
> I will try for the best features of both the 440 and HT413. More
> cubes from the 440, with essentially the same bottom end.
Exceptional
> cooling from the HT413 head design, huge water pump, rotating
sodium
> cooled exhaust valves, and lower, bigger exhaust manifolds that
have
> a 2½ inch exit at the same place as the stock FMC 440 manifolds.
The
> HT413 also came with double wall heat shields between the exhaust
> manifold and the block that are even bigger than the ones H.Day
built
> for #400.
>
> I will do further updates (I had already gone to a 4 groove crank
> pulley, 2 belts around crank/PS/water pump, and 2 belts for
> crank/AC/Gen that does not require fan/pulley removal to change any
> of the belts) to the belts and pulleys to match the HT413 water
pump,
> newer one wire altenator, MSD ignition, Crower roller rocker arms
> (like H. Day's #400),aluminum intake manifold (slightly modified
for
> the HT413 coolant circuit), Quadrajet carb w/electric choke and
idle
> solenoid for AC operation, bigger PS pump/reservoir and threaded
hose
> ends on the lines (no leaking hose clamps), rerouted heater
hoses,and
> a general cleanup of all the spagetti wiring in the engine bay. I
may
> do the simple fan shroud mod done on W. Jacoby's #536, or make a
big
> change to a two core aluminum radiator and some different shroud
> configuration. The rockers arms will make up any HP lost with the
> bigger diameter stems on the sodium valves. I'll add an X pipe and
> smaller, lighter mufflers than the HUGE HEAVY muffler my #120 came
> with. Maybe change to the Sanden AC compressor. I will definately
add
> a Fluid Damper to the crankshaft. Harry Day's belt pitching
problems
> went away after he added one to his#400 engine. There are some
> ingenious methods and additions I have seen to make the belts
tighter
> and tighter and tighter, but not for my FMC. I'll use the Jacobs
> Ceramic straight plug end set for the HT413 heads. I had already
> changed to a modern light weight starter (pics in the Photo
Section).
>
> Should end up with something that runs cool enough to pull my FED
> trailer around the Southwest in the middle of the summer. Once done
I
> do not want to work on the engine, just check/change fluids, and
take
> off with some certainty that any "adventure" on any trip will NOT
> COME FROM THE ENGINE.
>
> There are many fine FMC Motorhomes out there driving all over the
> country, and soon the Norse FMC #477 JEWEL will dazzle Europe.
> Perhaps none have any engine heating problems. I do not think my
#120
> will either, after I finish my 440/HT413 engine.
>
> I added a picture of what I think is a better Chrysler cast
> iron exhaust manifold, and plug heat shields, for the stock 440 as
> installed in the FMC.
>
> The stock FMC 440 spark plug wires are supposed to go around each
END
> OF THE HEAD (two wires around and down EACH END) and come up from
> below to each plug using a 90º plug wire end, not over the valve
> cover with all sorts of wire ties, strings, clamps, sticks, coat
> hangers, etc. holding the wires away from the exhaust manifolds
> because some insist on straight plug ends.
>
> Harry Day's #400 (with pictures) is on the FMC Owners Web site,
> showing his exhaust heat shields but most importantly the Jacobs
> Ignition CERAMIC 90º Spark Plug Wire ends that every STOCK FMC 440
> engine should be running. They are available at:
>
> http://store.summitracing.com/partdetail.asp?autofilter=1&part=JAC%
> 2D4480800&N=700+115&autoview=sku
>
> Hope this blah-blah-blah answered your question. Press on, Lou #120
>
>
> --- In FMCMotorCoach@yahoogroups.com, "Eric " <niteowl440@> wrote:
> >
> > Lou ... what about the 413 heads/water pump combo made you go in
> that
> > direction ? ... how is the chassis and "under-hood" fit on the
exh
> > mans and the water pump? ...