Group Project Idea

racecar builder said:
hobby machinist's

it's a fabricated intake manifold!:)

http://www.hobby-machinist.com/forumdisplay.php/109-Vintage-Cars-amp-Parts

one for Ford Y Block's and one for IHC V-8's.

it would take:

engine's to measure off of

cad drawings

sheet metal work and welding

some ready made parts

my contribution is rough drawings and

an engine to test it on ( someday!:)

have a nice day!
Click to expand...


Need more info than that. How many parts for 1 manifold etc. Time involved etc.

"Billy G" :whistle:
 
Why would this be a group project? Only you need/want one of these. Usually a group project is something everybody in the group wants/needs & related to (in this case) machine shop use/needs. It's not usually a selfish or self centered thing. If you want one of these and don't have the means to build it or afford it then you may want to see if someone would graciously build you one if you supply materials. There's been several really good & machinist related ideas that were pitched on here that never went anywhere as far as I know. Just my observation.
 
mr gruby

6 tin pieces.

2 pairs of spacers to go against the intake ports.

1 carb spacer to go under carb if it's a single 4 bbl setup.

sheet metal will work for this to keep price down for

people that want to build one at home.

if somebody wants to be deluxe they can just

substitute aluminum.

mr davidson

this is for Ford Y Blocks and IHC 304, 345 and 392.

lot's of enthusiast's want a low price performance manifold.

i had shelved this idea until i saw somebody SERIOUSLY thrashing

around trying to get one of these done.

i'd say i'd be lucky to get this done a year from now,

why should all those other people not get the plans until then?

have a nice day!
 
Im not sure the OP has really any idea of how much work goes into a fabbed intake manifold.

Now being I spent the best part of 30 yrs build race cars, mainly drag cars, Ive built enough intakes over the time to say, your not going to do one in a day.

This is not a group build type of thing. To start with you would need the block and heads on a stand to fit this to. The equipment to build such a item is extensive. Not everyone is going to have a brake, with radius dies to form the runners. Any and all that I have made have been from .125 aluminum. In that case a Tig welder is a must. And not just a small hobby welder. The base plates for a intake are usually no less than 3/8 thick, and usually 1/2 because after all the welding the intake to head surfaces must be trued up. Welding to thick plate like that, takes a lot of juice. My TIG welder is a water cooled unit to handle that type of work.

I dont know any thing of this ford motor the OP speaks of, but I can tell you hand crafted sheet Aluminum V8 intakes will usually take a well seasoned craftsmen 3 full days from start to finish, and the best part of day three welding it all up.
Though I am speaking of B.B chevy intakes from experiance.

On a final note;
Large plenum, short runner intakes are not a item for use other than hi RPM. Common to drag race motors that have a very narrow power band. Most of these motors have a usable power band of 1,000 to 1500 rpm, and all up at the top end of the power band @ 7500 to 8500 RPM.

There is a bit more to building a intake than just welding sheet metal together, trust me!
 
8ntsane

what's an OP?

here's a Paint drawing of the open plenum

split into two squared off log manifolds ( Front or Back View ).

that would ease alignment issues and keep it simpler.

the thick part on left side is a spacer around the pair of intake ports.

it takes two spacers per head, one big flange is unececessary.

the one on top is spacer under carb, a 2bbl for 2 manifold setup.

i still like sheetmetal!:)

it's cheaper to make prototypes and it's been done before.

have a nice day!

Fabricated Intake Manifold 2 Piece Front View 1.jpg
 
RCB, the OP is Original Poster

You might like sheet metal because its cheap, and weldable by most methods, (BUT)

If you ever have your motor go into valve float, and the mixture fires in the intake, it will blow your tin intake like a pop can.

Valve float, a bad ing wire that cross fires, a broken intake valve spring are just a few ways to trash a intake. Thats why they are usually built out of alum.

Cars that also run on the bottle will also use a blow off valve. These are the same as the blower intakes have. With the exception that the springs that hold the plate on place are much weaker than a forced induction type motor.

Thin sheet steel intake would take all but one little sneeze/or hiccup to turn it into a twisted/ split at every seem pile of scrap. You really need to rethink this (SHEET METAL) thing. ;)
 
paul

yeah, i was wondering about the 'backfiring' through the intake!:)

ok, final version convert to aluminum, i can live with that.

here's Paint drawing of top only, not a top view of whole thing.

2 bbl is mounted sideways because it fits better for prototypes.

Ted Eaton or Mummert in SD said y block intake faces are at 10 degree angle.

that's a little further up the line though.

have a nice day!

bob

Fabricated Intake Manifold 2 Piece Top 1.jpg
 
paul

here's pic of NAPA intake gaskets.

i say make a spacer for each set of ports.

they are spacers to keep sheet metal manifold

away from irregular head casting surface and bolt solid to milled intake port area.

i see the inner hold down bolt holes are aways from the ports, but tough!:)

a single manifold would be a 'Trough' manifold and 2 squared off log manifolds

would be a 'Split Trough' with space between them down the middle.

have a nice day!

Ford 292 Intake Gaskets.jpg
 
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