SOHC Intake Manifolds

[BH107]

Barry, were those adapter risers welded into place?

[Autoholic]

Found one of car but trying to find the pic's of manifold.

Did you find anymore pics of this intake?

[Autoholic]

Anyone ever seen this intake?

[jayb]

That kind of looks like one of those box-style NASCAR intakes, with a custom top to mount the carbs.  Usually on those manifolds the tops unbolt, and you can replace the top with a machined aluminum plate, allowing you to put any carb combination up there.  Having said that, I've never seen a NASCAR style box intake for an SOHC; it may be that the entire intake is fabricated, not just the top.  I like the way the LeMans float bowls were used on the 2 barrel carbs on that setup; along with the magneto it makes the engine look very period correct.

[BruceS]

Yep, that Vertex mag sticks way up there!  Also notice the 2 master cylinders; maybe the single reservoir one is for the clutch?  Very sanitary setup overall. 

Bruce

[TimeWarpF100]

Found one of car but trying to find the pic's of manifold.

Did you find anymore pics of this intake?

Have not found the one only of intake. Did not have digital camera back then . .

Some may recognize it here On book cover.

The close up is when I had it . .

[TimeWarpF100]

Another angle.

[BH107]

There are adapters under those throttle bodies as well, so it was probably an early version for inline 58mm Webers or the bolt on Hilborn setup.

Another note is that on the inline 58mm intakes the carbs are not mirrored like on the IDA intakes, and all of the carbs face the same direction.

[Autoholic]

Thanks for that info, again. Do you happen to know what the distance is between the top two and bottom two bolt holes? Or the distance between the centers of the two intake bores?

My intake is at my shop, so I won't be able to measure until Monday. I'll see if I can dig up a 48mm IDA this weekend in the Garage.

Any additional info? I appreciate any info on the specs of the 48 or 58 IDA's. While the intake will be conceptual, I will release the design once I'm done.

[Autoholic]

Bump

[BH107]

Bump

Sorry, been a crazy week and I haven't pulled the parts down... I'll try to get to it this weekend.

[machoneman]

an O/T (for this post) question for Jay:

Have you ever seen or have a pair of the OEM Ford cast iron SOHC exhaust manifolds?

A thread on the FE Forum reminded me of my January 2015 visit to Garlit's museum where I took a pic of the only set of said manifolds I've ever seen in person or even in pics.  I didn't know Ford made them up as the fully assembled 'crate' engines of yore I  don't think came with any headers. 

[jayb]

Never seen them in person, Bob.  I read somewhere that they were based off the 65 Galaxie cast iron 427 headers, with a crude modification to the cores, and only 8-10 sets were ever produced.  Just another rumor, I suppose, but you certainly don't see them around anywhere...

[WConley]

Yes I have a drawing stashed somewhere of those '65 SOHC headers.  You can see where the medium riser flange was erased and the new SOHC flange added and blended to the existing runners. 

I did see a SOHC engine in Ford's booth at PRI several years ago with a set of those manifolds on it.  Very cool!

[Autoholic]

Bump

Sorry, been a crazy week and I haven't pulled the parts down... I'll try to get to it this weekend.

Thanks, I appreciate it. I've started the process of figuring out the path the runners will have to take but without knowing if my 58 IDA footprint is correct, there is little reason to knock out the actual runner design. I've got about 60% of the curves down for the runner path.

I've decided that going with an expanding cone with a nozzle to reduce the bore diameter would be a good idea. It slows down the incoming air, thus creating a small increase in pressure right before the nozzle. This design should create a steady supply of air even at higher RPMs over that of a traditional runner design where you don't have an expansion chamber of sorts.