BMW V8 dry sump from billet

Gallery, Projects and General > Project Logs

<< < (52/73) > >>

Stilldrillin:
Nice to see you're back to it Ade!

That big lump's progressing/ developing nicely...... :thumbup:

David D

AdeV:
Good grief, another 7!!! months have passed, where does the time go?

Although I have many excuses, I shall deploy only the "moving shed" (which took between about March and July), and "mad busy at work" (August to present day). That and most weekends have been out & about recently, so stealing valuable workshop time. Today was an exception, so I finally got something done....

I've been procrastinating about the "ears" on this sump for ages. I finally spent a bunch of time measuring up:

The green bit is 9mm forwards from the back of the sump (the blue bit); so I will have to mill this bit away, otherwise the gearbox will not mount properly. I'm not sure what (if anything) the hole is/does at the root of the "ear", but as the gasket dodges it, so shall I.

So - a quick(ish) crap-o-cad (Mk2 - with rulers!):

It didn't take me long to decide I wasn't going to bother with the secondary cutout; way too complicated & time consuming for, ultimately, very little benefit. I mounted the sump on the rotary table so I could do all of the operations without having to physically shift it; what I did have to do was pull the mill head forwards to do the first ear, and backwards to do the 2nd. Each cut was done full-width (9mm) with a 0.675" cutter (the only one I can find capable of cutting full-depth, that isn't a roughing cutter, and which makes a reasonable stab at a surface finish). The climb cuts (not shown) were a good test of rotab & mill locking... to their credit, neither moved at all.

After taking the back section in by the required amount, the rotary table was orientated to the appropriate angle, allowing the "front" of the "ear" to be milled off, leaving the final shape:

I forgot to take pictures of the making of the semi-circular piece; but it ended up OK. The next picture shows where it will sit in relation to the sump, there are several cutouts necessary to allow access to the bolts at the back of the sump. There's some more shaping to do on the ears (they need to more-or-less follow the slope of the semi-circle to finish off that piece; and various holes to drill & tap for gearbox bolts; not to mention the bolts that will actually hold the piece to the sump...

Note the "bump" in the side of the sump, just next to the root of the ear - yes, it IS deliberate, to clear that there hole...

Hopefully, I'll have some time during the week to make more progress.

AdeV:
A small amount of progress:

The cut-out is to allow me to mount the spigots to which the outlet pipes will be connected within the overall plan of the sump. There's about 2cms before the plugs start getting in the way, I intend to expand each hole to around 3/4" (because that's the nearest I have to a 19mm end mill...), then tap them 1/2" BSP. The spigots will have an external 1/2" bsp thread (tapered, if I'm feeling brave) and be drilled/reamed through for 5/8" or 16mm to match the tubes.

AdeV:
More progress! At this rate, it'll be finished sometime....

First job, expand those holes:

3/4" end-mill, plunged straight down on the quill, about 2cms. Next job, thread the holes. Annoyingly, the only 1/2" BSP tap I have is a little stubby one, so any kind of power tapping was out of the question. The quill proved useful to get the thing started straight & true. The holes tapped very easily, and - this time - no broken taps!

Earlier, I'd turned up a spigot out of a scrag end of steel I scored off a mate (thanks Pete! :wave:), tapped one end 1/2" BSP to suit, the other turned down to 3/4" to suit the flexible pipe, leaving a bit of a flange in the middle which I'll turn into a hex bolt of whatever size ends up working:

Couldn't resist a trial fit:

Woo :)

2 more spigots to turn, a bit of dividing head work to cut the hexes, and the entire "oil system" part of the sump will be complete!

Divided he ad:
Ha! Just gave you a nudge in a message about this and then found it half done!

Nicely done chief. Looking good :ddb:

Now then are you just trying to show off?

--- Quote ---So - a quick(ish) crap-o-cad (Mk2 - with rulers!):
--- End quote ---

And you even have the prototype clipboard attachment not due out till early 2012!!! Who have you been bribing?
:lol:

You throw 'em and I'll hit 'em :)

Seriously... Very nice to see this moving along :thumbup:

Ralph.

Navigation

 Message Index

Go to full version