These guys do quality work. People in comments that are criticizing don't have a clue. They do a better job on vw cases than 90% of other shops. You want hack work, look at mofoco in Milwaukee Wisconsin.
I am surprised thats good enough to make a good seal to be honest, not having a dig because if it works then fair play but using a shorter end mill and a bigger sturdier holder would make a hell of a difference to the finish and accuracy, also running the finish pass anti clockwise (climb milling) would help the finish / accuracy too. but as i say fair play, if it works it works!
It made me smile when I saw the DPM being used! I have a DPM at home in my shop and need to open a case for 94’s. What sort of clearance is used on both of the diameters? .005?
Well for those out there who think his cutter is chattering are a little off. He is using a solid end mill holder and his cutter is running out a little. Also when cutting a magnesium aluminum casting the metal will be very hard on the surfaces so will have that sound when cut. It would be smoother and quicker to bore the holes but it is easier to do the step cut bores with the CNC program.
the center of the spigots remain the same?? seems like you did a mod to an engine that had a change of center to coincide with a new cam? or crank? fun watching thanks, John
at our shop we use a cutter that cuts one time .this vid takes to long to cut for 94s .by the time hes done cutting this case for 94s we would have all 4 cyl. holes done for 94s
It looks like you are getting a lot of chatter with that long end mill. How was the surface finish after the final pass? I can't tell from the video. Could this be done using a boring head or is there not enough clearance inside the block?
with 69mm crank you go from stock 1584cc to 1915cc, no one does this and also retains stock heads.cam, carb,exhaust so with these other parts modded your looking at 100-130hp average. (stock 50hp)
Why make videos of yourself doing such hack work? Seriously, just because you have a CNC machine doesn't mean they can do everything. The amount of chatter is awful. I know I'm going to be criticized for this comment, but I feel if someone is going to take the time to make videos like this they should be doing quality work....this is not.
+MrShobar look, I have built many aircooled vw engines over the years for many different people with some that I have had a hand in ending up in hot cw magazine. nor to mention I am a machinist by trade. I know what is quality and not, this is not.
The great things you can do to an engine never cease to amaze me!
These guys do quality work. People in comments that are criticizing don't have a clue. They do a better job on vw cases than 90% of other shops. You want hack work, look at mofoco in Milwaukee Wisconsin.
I am surprised thats good enough to make a good seal to be honest, not having a dig because if it works then fair play but using a shorter end mill and a bigger sturdier holder would make a hell of a difference to the finish and accuracy, also running the finish pass anti clockwise (climb milling) would help the finish / accuracy too.
but as i say fair play, if it works it works!
not good enough for you, perfectionist finish last and wrong coz they cant make up their mind always second guessing their decisions.
If stroke remains stock (69mm) the displacement changes to 1915 cc.
Cilinder volume = pi * radius^2 * stroke.
It made me smile when I saw the DPM being used! I have a DPM at home in my shop and need to open a case for 94’s. What sort of clearance is used on both of the diameters? .005?
Well for those out there who think his cutter is chattering are a little off. He is using a solid end mill holder and his cutter is running out a little. Also when cutting a magnesium aluminum casting the metal will be very hard on the surfaces so will have that sound when cut. It would be smoother and quicker to bore the holes but it is easier to do the step cut bores with the CNC program.
Anti clockwise in this case would be considered "climb cutting" , the tool is always trying to dig in
doubelhead boreing bar for rawcuting and finish boreing bar to make it size
so what is the actual size(diameter) of the cut?,opening it up for 94mm pistons?..thanx
Could you possible do a video on how you set this machine up for cuts such as this?
Thanks
These machines are based on the same Chevalier knee mill on which Milltronics based their Partner series machines.
I have a DPM3 at home. I love it!
the center of the spigots remain the same?? seems like you did a mod to an engine that had a change of center to coincide with a new cam? or crank? fun watching thanks, John
some coolant would help maybe?
at our shop we use a cutter that cuts one time .this vid takes to long to cut for 94s .by the time hes done cutting this case for 94s we would have all 4 cyl. holes done for 94s
That video will be for sale soon.
This process takes too long. Just make a flycutter to size and plunge cut the case.
Gives a better finish as well
It looks like you are getting a lot of chatter with that long end mill. How was the surface finish after the final pass? I can't tell from the video. Could this be done using a boring head or is there not enough clearance inside the block?
hi john does your machine not have helical interpolation it works so much better than just taking two cuts
regardes karsten from denmark
What material is that made out of? Why you running it at such a slow feed?
I use a co-axial indicator.
Hi there great work, mathematically how did you figure out those dimensions for hole locations? Thanks
considering he didn't check the clearance and just guessed it was enough , I'd say . not very well!
Why you don't machine on anticlockwise direction? I was told that it's more accurate and better for the cutter..?
LOL @ music starting at 18:25 through to the end :-)
Machine have a probe ?
how many CC's do u pick up after adding the 94's and what could be the gain in hp
with 69mm crank you go from stock 1584cc to 1915cc, no one does this and also retains stock heads.cam, carb,exhaust so with these other parts modded your looking at 100-130hp average. (stock 50hp)
De show b9nitos recuerdos cuando altere el motor de mi vw
This ladies and gentlemen is a "How NOT to do it video" what a mess !
Why make videos of yourself doing such hack work? Seriously, just because you have a CNC machine doesn't mean they can do everything. The amount of chatter is awful. I know I'm going to be criticized for this comment, but I feel if someone is going to take the time to make videos like this they should be doing quality work....this is not.
When you can write a few authoritative books on automotive machining (as John has), we might be inclined to listen to you.
+MrShobar nearly anyone can write a book, doesn't mean the contents are accurate.
The editor and the publisher make sure "the contents are accurate". Reputable publishing houses (such as John has) don't publish crap.
+MrShobar look, I have built many aircooled vw engines over the years for many different people with some that I have had a hand in ending up in hot cw magazine. nor to mention I am a machinist by trade. I know what is quality and not, this is not.
And so you think you're the best appraiser of the quality of your own work? That's a laugh.
"hot cw magazine". Now there's an authoritative tome.
50 cents
this case is destroyed crazy awful job