906 ci v12 Seagrave engine project. Gorgons' Grave 906

Check with these guys http://www.jandm-machine.com/index.html for your Seagrave V12 info./parts. I was thinking of building one myself a couple of years ago.

 

saw the monster pickup at Goodguys with the V12-awesome.

 

I like the ramp truck/car hauler idea. Don't you need a big truck to haul all those heavy old Caddy parts around? How 'bout a big utility style body like this?

 

sweet

 

They are a ***** to tune. Cool but a ***** to tune.

 

Pork&******, from the looks of that motor, I imagine you're talking ALL the tuning -- points, valve lash AND that updraft carb? Looks PREETY but WILD at the same time!

Ramblur, cool six! But, do you happen to know what the "manners" of this Pierce were like? I am ***uming it ran VERY smooth and quiet, given Pierce-Arrow's rep & hi-end clientelle???

 

John Evans: A BIG "Amen!" to that, buddy!!! I used to run outside when I'd hear sirens, JUST to hear those Seagrave V-12s ROAR!!! And the guys in the cab were ALWAYS smiling. I'll bet they LOOKED FORWARD to runs, in part just to make a BIG NOISE! LOL

 

how about this?

 

The 65 AWB Belvedere w/stack injected Hemi is optional of course . . .

 

Thank you. It looks like they are the real deal!

That is pretty sweet! However, I THINK I'm leaning towards a special style coupeb at this point.

Two miles per gallons not good, but it will be worth it!

 

Ok, here is what I know so far.

I'm going to run aluminum, two piece heads, like on my Caddy motor. This will allow me to get rid of a FEW lbs, and bump compression.

On my Cad, I'm using a Nash twin 8 dizzy. GMCBubba is trying to adapt it to electronic ignition. If it works, we will adapt these also.

I'm going to change intakes over to inline tri-powers on both intakes. I thought about twin blowers, but not very long or hard! Also, a custom, one-off cam similar to the Cads'.

I've pretty well decided on a 3 window coupe, with a really, really, really long hood. I thought about a boattail, but it has already been done. (see pics) I do plan a lower, less tall, profile than Big Bertha, though!

 

It is possible Ebay 270469374217 might be useful. And no, not my auction.

Jon.

 

Jon, Thanks.

Edit- Actually, I just read the link that Onlychevrolets posted, and the following was from his link. Thanks Onlychevrolets!

Here is a trick I heard (read) about: The plugs were originally seated on the top of the head where the paired stop-plugs are now. One of San Diego's chief's discovered that moving the plugs down to the level of the valve inspection/adjustment ports would give better ignition and mileage.

The first two pics show relocated plugs. the last pic is factory location.

When I have the aluminum heads made, I'll just have them relocated, without the top ports even on them.

 

Big Bertha is a Blastolene car. http://www.blastolene.com/

 

ajmopar-That would be a wicked car hauler!I'm not sure exactly what I want, but I'll know it when I see it!

Here is a '37 buick with a Seagrave, from Paperdog here on the board.Not sure if he built it, or just used to own it. Maybe he'll weigh in.Look how big the profile is! I'm not sure exactly how, but I'm gonna need to make mine a little smaller!

If anyone has any build ideas, or engine tricks, please post them!!!

 

That Buford was at Back to the 50's this year in MN!

 

With that many cylinders, you need more than two carburators. I didn't realize there was "flathead ****".

 

Having aluminum heads built for this motor is going to be a m***ive undertaking.

This engine has a very strange valvetrain layout. It is not a flathead.

Those valve access plugs are for installing the valves into the heads....the valves are at a 90* or so angle to the cylinder bore! The combustion chamber is huge and the compression ratio is really low (6:1 or 7:1....maybe lower).

 

My 906 came stock with a HUGE 2 barrel on it.

 

Should put it in a prius to make the environmentalists cry.

 

As long as none of the valve train is in the heads, It will be doable. It appears that the heads may almost be a two piece design? The plugs in the upper portion, and the valves in the bottem? Or is that part of the block? I would just be having the pieces with the plugs in them done in aluminum.


Now all I need are some HAMBers that know how to m***age this into a coupe, to want to be part of this!

 

The valves lay at 90* to the cylinder in the HEAD. The access plugs on the bottom edge of the head are for removing the valves. The rocker arms are more or less vertical. Pull one of the acess covers in the V and all will become clear.

 

Here is a cross section view.

 

Thanks John, I understand now! I truly thought the plugs were in a 'flathead' type piece. I haven't been to MI. yet to pick it up, and have just been looking at pics. do you know where I can get a service manual for this engine?

Flipper, I have to agree, that aluminum heads are not going to happen!

Still looking for those volunteers!

 

BINGO! that would be pimp

 

hahahahah fkn awesome post for a new guy!

 

Now, my experience with these duel ignition systems was;
I'd run the motor with both ignitions running at once. You could switch to an single ignition to see how it ran, if there were any misses, problems or such. Very rarely would ignition #1 run just like #2. they always ran better with that double spark happening.

 

I'm still looking for build ideas.

Can anyone photoshop this into a 36 style Ford coupe, utilizing the Seagrave front end? Looking for long and low, different from the everyday coupe!

Thanks

 

hey more bits of useless info .. the guy who put the seagrave in the 38 buick ... bought a 50 foot roll of sparkplug wire to make up new wires and it was not enough.. it took approx 70 feet
the points were hard to find as was the caps and rotors good luck

maybe the pierce arrow guys can help with ign. stuff?

 

Plym46 & Alfred, guys I always ***umed the primary ignition was conventional and the backup was MAGNETO-powered (which, I think, was how the Graham-Paige dual system worked). Was this ***umption correct, OR are they separate, independent AND conventional (points, cond., etc.)??? THANKS!