Rebuild plans for Y Block


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By rexbd - 16 Years Ago
With the 55 Tbird body taking shape its time to cart the engine off to machine shop.  After reading lots of posts on the website here are my plans for the engine.  Keep in mind I am not looking to create a race car just a spirited solid driver.

Have engine and components bored, balanced and decked as necessary to start with a nice solid square platform.

Zero deck the pistons

groove block for oil flow in center bearing chase

Add larger valve heads with VITON seals( have found a nice set) would do aluminum but that is for another day since they aren't ready

57 up distributor with Peritronix conversion

Blue Thunder manifold with gaskets that restrict heat passages

FPA headers ( used on my mustangs and great product)

Modern carb with electric choke

PCV dump the road draft tube

Mild street cam (want a little rumble but be drivable)

Roller timing chain

Higher ratio rocker arms (found a very clean original set)

Large flow thermostat 170 to 180 degrees and 7lb cap

electric fan and modified water pump to increase flow (July and August get real hot in Southern Illinois so more cooling the better in my mind)

FMX tranny conversion

Balance tube and 2 inch exhaust

Any parts not used (original tach, fordomatic TPot will go into storage)

Need advice on Cam and any observations on mistakes I am proposing.  Love this website, the best I have ever been on for getting help

By mctim64 - 16 Years Ago
Everything you have listed looks good, although I would just groove the center journal on the cam for better oiling to the heads, it can be an expensive mod to groove the block and for the street the cam should do fine. Also I would not run any type of valve seal, I know most people on here like some sort of valve stem seal but with new guides with proper clearance they are not necessary, and it is nice to get a little oil on the stems anyway. I don't run them on my engine and the only thing that smokes is the tires.  BigGrin
By simplyconnected - 16 Years Ago
One suggestion that comes to mind;
Use Mctim64's timing chain oiling system by boring a .060 hole in the front cam bearing oil galley behind the cam thrust plate, then cut a small groove in the plate to form a path for the oil.  Notice the fabricated sheet metal oil pan:



Tim and I agree on pressurizing Y-Block rocker shafts to give positive oil pressure to all the rocker arms.  This mod also raises your system's oil pressure.  You may want to consider the same after carefully examining at your original rocker arm shafts.  (Some members choose to leave them the way they came.)  By the way, Dennis Carpenter sells new shafts for $15/ea +s/h.

By simplyconnected - 16 Years Ago
I forgot to ask, are you building the engine or having it done?

For my 292, I bought a Fel-Pro gasket full gasket set.  Now, I wish I had bought a BEST Full Gasket Set.  They're good quality and much cheaper.  The Fel-Pro set had four sets of intake manifold gaskets, and lots of other redundancies that I really don't need.  That's why the price is higher.

Remember to ask for a BEST set with a neoprene rear seal (instead of the rope).  They might come that way, but I would double-check.  - Dave

By rexbd - 16 Years Ago
I will have the build done by the machine shop only a few hundred dollars more for them to put it all together and then they warrenty the work.  Aprreciate the suggestions and will talk to the builder about the seal idea.  Any ideas on a good street cam?
By rexbd - 16 Years Ago
Another question that just popped in my head.  Something about valve guides I remember reading about what should I do there.
By Oldmics - 16 Years Ago
Rexbd

I"m just gonna throw this out there as some cam information.

I am currently involved in having the 57 Blower cam and ALSO the 1956 Mercury/Ford 260 H.P. cam remade to original specs.

They should be availiable shortly.

I am gonna use the 56 cam in my engine which is very similiar to yours (except mine is a 60 over 312) I assume you are doing the original 292 engine.

Specs on the 56 cam are 300* lift,113 centerline,257 duration.I can give you the valve timing event if interested.

The 57 Blower specs are 290* lift,110 centerline,290 duration.Again I can give you the valve timing event if interested.

I think either will be a fun romp! w00t

Probably $199.00 plus shipping each.You will need good lifters.

Might be of interest to you.

Oldmics

By pcmenten - 16 Years Ago
CamCraft in Maryland has a 'Marine' grind with about 113 LSA. I'll have to post the rest of the specs later.



If your block and heads don't already have them, it's probably useful to drill the steam holes in the deck between cylinders 2 and 3 and between 6 and 7.



What block are you using? Be aware of the main cap bolt issues with certain blocks.



Cut slots across the oil holes in the rocker shafts.



Degree the cam.
By rexbd - 16 Years Ago
I will be using my original 292 block. 

Car is very original though a mess when I bought it. Had been in storage for 30 plus years.

By Oldmics - 16 Years Ago
According to a Mercury modification letter that I have,that .060 hole was originally speced as 3/32 and it needs to be drilled on a 45* angle to the surface of the plate.

Oldmics

By simplyconnected - 16 Years Ago
rexbd (5/7/2009)
...Something about valve guides I remember reading about what should I do there.

Do you mean, hardened exhaust valve seats?  Modern fuels demand hardened seats.  Some guys claim they have no problem with the original seats because they only run the engine in the city and 'on occassion'.

I plan on driving my '59 Galaxie to Chicago (from Detroit).  My 292 must be totally roadworthy at highway speeds with no worries.

I retained my original valves because they were within spec's.  Sloppy guides must be re-worked and small-diameter valve stems must be replaced.  Most machine shops bore the guides and insert a bronze insert.  After reaming, they do a complete valve grind on the seats, using the guides for tooling.  The valve angles and tips are ground in a separate machine.

USE BRASS FREEZE PLUGS.  They don't cost much more and they will never rust out (from the inside as well).  Marine engines use them, so brass is available.

By speedpro56 - 16 Years Ago
Other good cam grinds for a stock converter automatic is 224 @ .050 rated duration 270S .468 lift  and a 110 LSA. This is far better than stock and very streetable.    

If you are running a stick shift then you can step up to a 232 @  .050  rated  duration  MA259-1  .495  lift  110  LSA.  I've run these cams and there much better than stock.             These cams are from Comp cams. Good luck with your build.                                                                                     

By rexbd - 16 Years Ago
Which way is the angle on the hole for thrust plate modification.  If drilling at 45 degrees I assume this is done to angle towards the flow of the oil to allow for better passage into the groove.  Towards 12 Oclock, or 6 Oclock etc?

Appreciate all the advice!

By Ted - 16 Years Ago
simplyconnected (5/7/2009)
USE BRASS FREEZE PLUGS.  They don't cost much more and they will never rust out (from the inside as well).  Marine engines use them, so brass is available.

Among other options are stainless steel freeze plugs which fit much tighter in the core holes and do not have the tendency to be pushed out by water pressure like the brass plugs.  Brass just doesn’t have the same friction fit as the original iron plugs so they are not looked upon favorably in this part of the country without additional measures being taken to insure they stay in place.  Stainless steel freeze plugs are available in most common sizes including those for the Y.

By Oldmics - 16 Years Ago
The hole originates in the same location that Tim"s picture shows.

It is then drilled upwards towards the 12:00 o"clock position.

There is also a reccomendation in Eickmans Y Block book on page 66 about cutting 4 stright grooves into the thrust bearing itself.

Worth taking a look see at.I can send you copys of both if you like.

Oldmics

By simplyconnected - 16 Years Ago
rexbd (5/8/2009)
Which way is the angle on the hole for thrust plate modification.  If drilling at 45 degrees I assume this is done to angle towards the flow of the oil to allow for better passage into the groove.  Towards 12 Oclock, or 6 Oclock etc?...

I drilled my hole straight in.  You are going into an oil hole with ~40-psi of pressure.  The concern is, not to make the hole too large because the #1 cam bearing needs oil flow.  There will be plenty of oil (regardless of angle) to lube the timing chain.

I like the idea of cutting passages into the bearing as that ensures the bearing gets oil first.  Either method is good as long as it's done right.

I put a rod inside the oil hole from the crank journal, and picked my drill-hole location by eye (it's easy).  Then I drilled the sixty thousandths hole straight in at 90*.  I spread a very thin layer of plumber's putty (or clay) on the thrust plate, I bolted the uncut plate in, to squish the putty.  When I unbolted the plate, the block hole showed up as a dot on the back side of the plate.  I center-punched the dot, and drilled a shallow dimple in the punch mark (for location variation).  Then I grooved the plate from the dimple to the plate's edge with a thin Dremmel disk.

The thrust plate (not the block) gets the small groove.  That way, if you ever need, you can block the hole by simply turning the plate.

Whew!  All that for a tiny (but important) hole.  The chain only needs a few drops of oil per minute.  A .060" hole will give much more than that, in fact, a smaller hole will do just fine.

-  Dave

By rexbd - 16 Years Ago
Guys, thanks for all the advice.  Would have responded sooner but live in southern Illinois and we just got the heck torn out of us by what has been called an inland hurricane.  Darndest thing I have ever seen.  House and cars OK no power but thank god for generators, but 20 trees at least 50 to 70 feet tall down.  Wearing out chain saw blades right now.
By mctim64 - 16 Years Ago
Glad to hear you are alright, sounds like quite a ride. w00t
By simplyconnected - 16 Years Ago
rexbd (5/12/2009)
...House and cars OK no power but thank god for generators, but 20 trees at least 50 to 70 feet tall down...
  Rex, do you think it is coincidence, after at least 20 were downed, there was no personal, house, or car damage?  Each of those trees weigh many tons; I call that a protective-miracle straight from God himself.  Glad to hear you and your family enjoyed Mother's Day unscathed.

-  Dave