Thread: 302 cyl head print (needed!)

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I need a cyl head print for a 302. my casting number is a d08e head, but any 302 head will basicly work. I mainly just need the exhaust face.
Thanks,
Dave Henderlong

just what in the he double hockey sticks are you asking for ....ted

Originally Posted by Henderlong

I need a cyl head print for a 302. my casting number is a d08e head, but any 302 head will basicly work. I mainly just need the exhaust face.
Thanks,
Dave Henderlong

First, what is a "Cyl head print" of the "...exhaust face" on a SBF 302? Second, what specifically are you trying to do, and it's likely someone here can answer your question.

any small block ford exhaust gasket will give you the pattern layout if that`s what you mean ( 289 /302 /351 windsor ..

302. its a small block ford engine. commonly known as the old 5.0l. My cylinder head casting numbers are d08e. Those are my heads for my 302ci.
I need an exhaust port face print, meaning the exact dimentions of an exhaust manifold flange that will fit on the 302ci.
Im trying to find the print of the head so i can make an exhaust flange that will mount up to my d08e cylinder head.
I'v been trying to trace the gasket on a piece of paper, but i need more acuate dimentions.
So if you have any information on the blueprints, please post it.

I think most everyone here understands that a 302 and 5.0L are the same engine, and I don't have engineering drawings of the SBF 302/5.0L heads, but I chased header flanges through a lot of sources and ended up buying a pair from Stainless Headers Manufacturing, Inc out of MN - 3/8" thick and precise fit stock ports for $74 delivered ($29.95 each and $13 shipping March 2010) http://www.stainlessheaders.com/flanges He has flanges for all heads, either stainless or mild steel, and he knows his business. Headers by Ed is another place that really knows their heads - http://www.headersbyed.com/ Both Summit & Jegs also have flanges, bare or stubs, with prices ranging from <$50 to $150. Hard to believe you can make a set cheaper than you can buy them today, but I may not understand what you're doing.

You can go to the site of Schoenfeld headers and download about any header flange spec you might want and/or buy a gasket to copy from several aftermarket heads/bolt patterns

Originally Posted by Louey

Is this what you want ?

from the center of a bolt hole on the right side of the port hole to the center of the bolt hole on the left side of the port hole is 2.0000'' center to center the you subtract the width of the port hole which is 1.3200'' they are round to the nearest 4th decimal place so the precision = .01 or ten thousants so 2.0000'' -1.3200'' = 0.68" divided by 2 because there are 2 spaces one on each side of the port hole from the edge or the port hole to the center of the bolt hole both sides so 0.68"/2=0.34" so from the edge of the port hole to the center of the bolt hole is 0.34" both sides

Originally Posted by Dano61

from the center of a bolt hole on the right side of the port hole to the center of the bolt hole on the left side of the port hole is 2.0000'' center to center the you subtract the width of the port hole which is 1.3200'' they are round to the nearest 4th decimal place so the precision = .01 or ten thousants so 2.0000'' -1.3200'' = 0.68" divided by 2 because there are 2 spaces one on each side of the port hole from the edge or the port hole to the center of the bolt hole both sides so 0.68"/2=0.34" so from the edge of the port hole to the center of the bolt hole is 0.34" both sides

C'mon, the horizontal spacing is obviously centered and thus easily calculated. His question is the vertical spacing of the holes relative to the center of the port. That dimension is obviously not centered, and there is no way to calculate the amount of offset from the information given. You can scale it, but he's asking for factory dimensions, as I understand his question.

It's all really moot - as has been pointed out there are already a ton of bare flanges on the market by people buying materials in bulk, and doing one that reinvents the accuracy is not going to be the multi-million dollar marketing idea never done before, but may be a dandy highschool tech center project.

thanks Louey, I had some of the prints around here but no way to upload them so just mentioned that Schoenfeld had them. I usually get the gaskets and mild steel flanges from them , modify the flanges to fit our heads and send the prints and gaskets/flanges to Stainless Headers in MN to have the flanges made from Stainless Steel .

I agree with the guys. Unless you have the equipment to cut those flanges yourself buy ones from one of the vendors who have them on the shelf. 289-302-351 header flanges are a dime a dozen, no magic whatsoever, so why reinvent the wheel?

Don

THANK YOU Louey!. you have no idea how long i have been trying to find these.BUT....

i still need a location for the mounting stud holes (to hold the flange to the head). These are not givin. and they look off centerd from the port holes. How do i find this?
I have the right tools to cut these out. I can make them cheaper that 75 bucks or whatever
Depending on the price of steel i can basicly make the flange for around 5 cents a pound.

This flange will then be tig welded to a set of custom flared pipes. I'l try to keep you guys updated.

And by reinventing the wheel, if it is not perfect there is stll room for inprovment

2.00/2.38?????are the bolt spacings and they are in a straight line!!!

if these don't supply you with the info you need you can go to their site and download more---or buy a gasket!!!!!

We seem to have a basic mis-communication here, or at least I am very confused. This flange is a part of the header, and it bolts to the machined head surface with the eight header bolts adjacent to each exhaust port, into the 3/8x16 threaded holes in the head. Your "custom flared pipes" weld directly into the oblong holes in the header flange, unless you buy flanges that already have stubouts - then your primary pipes weld to the stubs instead.

The only thing I could see that might be different is if you have a set of the SVO oval port heads, which have the bolt holes at an angle because there's not enough meat at the sides. If you have those heads then your header flanges are drilled in that pattern vs the straight line shown in the drawing Louey posted. Picture of the SVO is attached. Is this what you have??