Cad Files for cylinder head?

[TDsamurai]

Hey guys, i was wondering if anybody has a CAD file for a cylinder head, im looking to get one machined out of billet steel or maybe even aluminum at the shop, But if i can save a few months in drawing time that would help alot!! Thanks in advance.

[8v-of-fury]

Lookup NintendoKD a user here.

He has had this thought. For what they were worth, I recall them being not worth it.

[8v-of-fury]

what is wrong with oem?

[TDsamurai]

there isnt much "wrong" with OEM. But i did warp a head to the point the precups fell out upon removal and the cracks between the valves have spread wider than the thickness of a dime. Supposedly this was from too high of cylinder pressures, i never ran higher than 1300 for short periods on the EGT gauge so i dont think that was the issue. I want to make my own head mostly to increase the flow as much as possible. I don't have much intention to sell them since it probably will cost more than most consider reasonable. This could be considered more of an art project the way i see it. I have a running engine at this point and would like to build a completely overkill engine to swap out down the road. I am aware this could take a couple years. Call me crazy but i would like to do a billet block aswell possibly with replaceable liners. Lets stick to one thing at a time though.

[8v-of-fury]

I am gonna go out on a limb and say there isn't gonna be much help here, or anywhere really..

I've been around, and no one is doing this. You will be pioneering it

I wish you luck on your endeavors.  

ps. Have you considered the Direct Injected engines?? 

[Alcaid]

Not a chance to machine a head, needs to be casted.

[theman53]

Go for it. And if you do steel I am in for one.

[TDsamurai]

I don't need anyone to tell me I am wasting my time or it can't be done. It can and its a hobby not my daily driver. How much would you be willing to pay? Probly lookin at an easy 2g it's a big chunk of steel.

[theman53]

I would like it cheaper.

[libbydiesel]

How can you machine the coolant channels from a block of steel without a cutter that can cut around corners?

[TDsamurai]

Modify the passages. Possibly make two passages that intersect then plug them off. Or maybe make the head out of two pieces, I haven't decided yet.

[TylerDurden]

You could make it in layers using CNC.

[rallydiesel]

Andy2 made a tdi steel head successfully. I don't know how he did it but I believe the oil passages were external hard lines so maybe it was a fully machined head and not cast in any way. I believe he runs one of these custom heads at over 100 psi boost pressure.

[MJF]

Make it flow, you dont need 100psi.

[Jetmugg]

For prototyping like this, you would probably be better served by starting with a stock cylinder head and a CMM (coordinate measuring machine).  I don't think you will find CAD drawings, unless you have an "insider" at VW.

I think it "could" be done as a complex assembly (probably more than 2 layers).  This would be a job for a very skilled and experienced machinist. 

Cast iron could be done much more simply, but you would need access to the foundry patterns and cores, which are probably owned by VW.  If you had an inside contact at one of their foundries, it's possible, although still very difficult.


For what it's worth - I'm a Metallurgical Engineer.  If you get to the point that you need any metallurgical help, just let me know.

Steve.