Topic: diy low comp pistons (Read 14730 times)

Passenger · « **Reply #30 on:** June 21, 2009, 03:04:42 PM »

Quote from: Joseph Davis on June 21, 2009, 01:33:43 AM

Quote from: Passenger on June 21, 2009, 01:10:09 AM
Quote from: Joseph Davis on June 19, 2009, 01:29:13 AM

Vitaras also have a very thick crown. With how the 1.7 stroker setups bump CR up to a horrible 9:1 CR, lathing a piston down is one of the ways in which we've discussed lowering CR back down to a heavenly 7.5:1.

I do this to DI diesel pistons a lot, which is fun because the combustion chamber is eccentric to the O.D.

By the way its called "turning", not "lathing".

Turning is every bit as inaccurate as lathing. It's a garbage baby word meant to communicate with simpletons. The actual machining operations possible on a lathe are cutting, sanding, knurling, drilling, or deformation. The procedure being discussed, if it's called anything, is cutting.

ok??

Actually, no, you are wrong. Turning is the process of turning the work piece, instead of the cutter like on a milling machine. Turning does not, and is not intended to dictate the the method of material removal or forming thereafter. Turning is a process, a lathe is an object. You know the difference.

E-b0la · « **Reply #31 on:** June 21, 2009, 03:49:22 PM »

Quote from: Passenger on June 21, 2009, 03:04:42 PM

Actually, no, you are wrong. Turning is the process of turning the work piece, instead of the cutter like on a milling machine. Turning does not, and is not intended to dictate the the method of material removal or forming thereafter. Turning is a process, a lathe is an object. You know the difference.

you are arguing over nothing, shut up.

Now back on topic,

I'm looking at the used set of vitaras for my vitara ls rod build I'll never finish, doesn't seen to be too much material between the underside of the piston and the bottom of the dish.

maybe taking a small amount off the top edges, and making the dish wider would be the way to go? Although taking material off the top would result in the rings being closer to the top of the piston, might not be good.

Passenger · « **Reply #32 on:** June 21, 2009, 04:10:24 PM »

Quote from: E-b0la on June 21, 2009, 03:49:22 PM

Quote from: Passenger on June 21, 2009, 03:04:42 PM
Actually, no, you are wrong. Turning is the process of turning the work piece, instead of the cutter like on a milling machine. Turning does not, and is not intended to dictate the the method of material removal or forming thereafter. Turning is a process, a lathe is an object. You know the difference.

you are arguing over nothing, shut up.

Now back on topic,

I'm looking at the used set of vitaras for my vitara ls rod build I'll never finish, doesn't seen to be too much material between the underside of the piston and the bottom of the dish.

maybe taking a small amount off the top edges, and making the dish wider would be the way to go? Although taking material off the top would result in the rings being closer to the top of the piston, might not be good.

Cry the tears of a thousand whores.

You would probably be best off dropping the bowl area including the radius given there is enough material in the cross sectional area. I wouldn't try making the bowl wider unless I was out of options.

Whitey · « **Reply #33 on:** June 21, 2009, 10:41:13 PM »

Quote from: Passenger on June 21, 2009, 01:10:09 AM

By the way its called "turning", not "lathing".

I was going to say the same thing when I read that but I knew I'd probably get a 500 word paragraph on why I was wrong.

Quote from: Joseph Davis on June 21, 2009, 01:33:43 AM

Turning is every bit as inaccurate as lathing. It's a garbage baby word meant to communicate with simpletons. The actual machining operations possible on a lathe are cutting, sanding, knurling, drilling, or deformation. The procedure being discussed, if it's called anything, is cutting.

ok??

Sorry but your wrong. At my work we have over 100 lathes (a couple 9 axis Okumas :yes: ) and if I would ever say "lathing" I'd be laughed at. That machining operation is called turning becuase your using a single point tool and rotating the workpiece using a lathe. Also, sanding is not a machining operation (even if it was directly quoted from Wikipedia.)

Corey · « **Reply #34 on:** June 21, 2009, 11:43:22 PM »

yup if i asked to have something lathed down at work they would look at me funny. sorry joey, owning a lathe doesnt make you an expert on machinist jargon.

patsmx5 · « **Reply #35 on:** June 22, 2009, 12:11:38 AM »

turning a part down is correct nomenclature if you're talking about using a lathe. I've done a wee bit of machine work before.

Zarcorp · « **Reply #36 on:** June 22, 2009, 05:17:10 AM »

I made chocolate muffins today. They were delicious.

Doug · « **Reply #37 on:** June 22, 2009, 05:39:08 AM »

Quote from: Zarcorp on June 22, 2009, 05:17:10 AM

I made chocolate muffins today. They were delicious.

I made some hard lemonade, it wasn't

Zarcorp · « **Reply #38 on:** June 22, 2009, 05:57:39 AM »

It's okay, I tried making Thai coconut ice cream, it's solid as a rock.

I don't think I let it get thick enough before freezing it.

Foowee · « **Reply #39 on:** June 22, 2009, 07:51:12 AM »

Quote from: Joseph Davis on June 20, 2009, 06:57:49 PM

need a Vitara to cut in half before I can comment

Robb · « **Reply #40 on:** June 22, 2009, 09:11:56 AM »

Reported this thread for lack of entertainment and too many people concerned about syntax errors.

ok.

dvst8r · « **Reply #41 on:** June 22, 2009, 10:21:22 AM »

Anybody happen to have a stock D piston cut like Foowee's?

Foowee · « **Reply #42 on:** June 22, 2009, 10:33:40 AM »

Quote from: dvst8r on June 22, 2009, 10:21:22 AM

Anybody happen to have a stock D piston cut like Foowee's?

pm3:

pm7:

p28:

dvst8r · « **Reply #43 on:** June 22, 2009, 10:56:09 AM »

Foowee is on top of it.

Nice work.

Edit: Thanks for the pics Bone

Foowee · « **Reply #44 on:** June 22, 2009, 11:39:59 AM »

Thank crxtaz for the pics. I'm just clicking "copy n paste".

Joseph Davis · « **Reply #45 on:** June 22, 2009, 12:11:57 PM »

Quote from: Corey on June 21, 2009, 11:43:22 PM

yup if i asked to have something lathed down at work they would look at me funny.

My point exactly. I don't work with a bunch of machinists, and you all understood what I meant, so the collective lot of you can wash the sand out of your vaginas.

Foowee, give Chuck props for that piston carnage.

Passenger · « **Reply #46 on:** June 22, 2009, 04:10:45 PM »

Quote from: Joseph Davis on June 22, 2009, 12:11:57 PM

Quote from: Corey on June 21, 2009, 11:43:22 PM
yup if i asked to have something lathed down at work they would look at me funny.

My point exactly. I don't work with a bunch of machinists, and you all understood what I meant, so the collective lot of you can wash the sand out of your vaginas.

Foowee, give Chuck props for that piston carnage.

Your response disappoints me

Joseph Davis · « **Reply #47 on:** June 22, 2009, 04:15:53 PM »

Apathy's hard to argue with, huh?

Passenger · « **Reply #48 on:** June 22, 2009, 06:27:01 PM »

I didn't read it as apathy as much as I did "I'm not going to admit I don't know what I am talking about"

Joseph Davis · « **Reply #49 on:** June 22, 2009, 06:38:45 PM »

Read whatever you want to into it. I had a two year degree in CNC machining from the late 90s and basically no experience since. I'm qualified to not crash the tool holder into the chuck, and not much more, and I don't give a fuck about correct terminology.

Whitey · « **Reply #50 on:** June 22, 2009, 08:41:39 PM »

Quote from: Joseph Davis on June 22, 2009, 06:38:45 PM

Read whatever you want to into it. I had a two year degree in CNC machining from the late 90s and basically no experience since. I'm qualified to not crash the tool holder into the chuck, and not much more, and I don't give a fuck about correct terminology.

There's no way you have your machinist papers or a "CNC machining degree" and make a statement like this:

Quote from: Joseph Davis on June 21, 2009, 01:33:43 AM

Turning is every bit as inaccurate as lathing. It's a garbage baby word meant to communicate with simpletons. The actual machining operations possible on a lathe are cutting, sanding, knurling, drilling, or deformation. The procedure being discussed, if it's called anything, is cutting.

Joseph Davis · « **Reply #51 on:** June 22, 2009, 08:55:22 PM »

I'm not a liar, Whitey. You can kiss my ass.

1991civicsi · « **Reply #52 on:** June 22, 2009, 09:06:27 PM »

Pics look great, but. when did this thread get gay?

Joseph Davis · « **Reply #53 on:** June 22, 2009, 09:38:54 PM »

When the grammar cops arrived.

dvst8r · « **Reply #54 on:** June 22, 2009, 09:45:45 PM »

Quote from: Joseph Davis on June 22, 2009, 09:38:54 PM

When the grammar cops arrived.

Syntax cops I believe is what you were looking for.

fysh · « **Reply #55 on:** June 22, 2009, 09:58:38 PM »

Run! its the poh-leeeeease.

Joseph Davis · « **Reply #56 on:** June 22, 2009, 10:09:40 PM »

Quote from: dvst8r on June 22, 2009, 09:45:45 PM

Quote from: Joseph Davis on June 22, 2009, 09:38:54 PM
When the grammar cops arrived.

Syntax cops I believe is what you were looking for.

Right! Whatever it is, I suck at it.

Passenger · « **Reply #57 on:** June 23, 2009, 11:10:51 AM »

I agree, sorry Yoseph, I like you, but I call bull on spending two years in school for cnc machining and you call turning "lathing".

Robb · « **Reply #58 on:** June 23, 2009, 11:38:01 AM »

I think he meant he took some classes for 2 years. You have to remember where we live, his teacher probably didnt know/care about proper terminology.

dvst8r · « **Reply #59 on:** June 23, 2009, 11:47:42 AM »

Quote from: Robb on June 23, 2009, 11:38:01 AM

I think he meant he took some classes for 2 years. You have to remember where we live, his teacher probably didnt know/care about proper terminology.

But could probably play a mean banjo...

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Author Topic: diy low comp pistons (Read 14730 times)