OIL PUMPS GALORE!!! Machining - Page 11 - Miata Turbo Forum - Boost cars, acquire cats.

Welcome to Miataturbo.net   Members
 


DIY Turbo Discussion greddy on a 1.8? homebrew kit?

Reply
 
 
 
LinkBack Thread Tools
Old 04-30-2008, 08:35 PM   #201
Elite Member
Thread Starter
iTrader: (6)
 
Loki047's Avatar
 
Join Date: Sep 2005
Location: Chicago
Posts: 4,145
Total Cats: 0
Default

Quote:
Originally Posted by y8s View Post
how about if we just make them out of carbonitrided martensite.
I think that would worry me even more with shattering.
Loki047 is offline   Reply With Quote
Old 04-30-2008, 09:03 PM   #202
y8s
2 Props,3 Dildos,& 1 Cat
iTrader: (8)
 
y8s's Avatar
 
Join Date: Jun 2005
Location: Fake Virginia
Posts: 19,037
Total Cats: 406
Default

seriously though I think a case hardened annealed alloy would be good for wear and durability both.
y8s is offline   Reply With Quote
Old 04-30-2008, 09:36 PM   #203
Elite Member
Thread Starter
iTrader: (6)
 
Loki047's Avatar
 
Join Date: Sep 2005
Location: Chicago
Posts: 4,145
Total Cats: 0
Default

The metal is really gonna be the cheapest part of this, so I think we should splurge and get a non heat treated 28C alloy. I cant remember the name of it though. Easy as sin to machine and since its not heat treated you dont get some of the nasty effects
Loki047 is offline   Reply With Quote
Old 04-30-2008, 11:20 PM   #204
y8s
2 Props,3 Dildos,& 1 Cat
iTrader: (8)
 
y8s's Avatar
 
Join Date: Jun 2005
Location: Fake Virginia
Posts: 19,037
Total Cats: 406
Default

you heat treat after machining... to remove machining induced stress and then harden the outer skin to prevent wear but still maintaining the overall ductility.
y8s is offline   Reply With Quote
Old 04-30-2008, 11:42 PM   #205
Elite Member
Thread Starter
iTrader: (6)
 
Loki047's Avatar
 
Join Date: Sep 2005
Location: Chicago
Posts: 4,145
Total Cats: 0
Default

**** heat treating theres no reason for it. And since most heat treat places add more carbon than I would want in my gears
Loki047 is offline   Reply With Quote
Old 05-01-2008, 11:25 AM   #206
y8s
2 Props,3 Dildos,& 1 Cat
iTrader: (8)
 
y8s's Avatar
 
Join Date: Jun 2005
Location: Fake Virginia
Posts: 19,037
Total Cats: 406
Default

how about if I stick them up your butt for 20 minutes.
y8s is offline   Reply With Quote
Old 05-01-2008, 11:28 AM   #207
Elite Member
Thread Starter
iTrader: (6)
 
Loki047's Avatar
 
Join Date: Sep 2005
Location: Chicago
Posts: 4,145
Total Cats: 0
Default

Quote:
Originally Posted by y8s View Post
how about if I stick them up your butt for 20 minutes.
Yeah but then how do we quench em?
Loki047 is offline   Reply With Quote
Old 05-01-2008, 11:35 AM   #208
Miotta FTW!
iTrader: (24)
 
Splitime's Avatar
 
Join Date: Jun 2006
Location: Chicagoland, IL
Posts: 4,292
Total Cats: 26
Default

Pee?
Splitime is online now   Reply With Quote
Old 05-01-2008, 11:54 AM   #209
Elite Member
Thread Starter
iTrader: (6)
 
Loki047's Avatar
 
Join Date: Sep 2005
Location: Chicago
Posts: 4,145
Total Cats: 0
Default

i follow. Alright lets do this thing
Loki047 is offline   Reply With Quote
Old 05-01-2008, 12:09 PM   #210
y8s
2 Props,3 Dildos,& 1 Cat
iTrader: (8)
 
y8s's Avatar
 
Join Date: Jun 2005
Location: Fake Virginia
Posts: 19,037
Total Cats: 406
Default

awesome.

not many threads can go from metallurgy to scatalogy.
y8s is offline   Reply With Quote
Old 05-01-2008, 12:11 PM   #211
Elite Member
iTrader: (39)
 
Zabac's Avatar
 
Join Date: Sep 2007
Location: High Point NC
Posts: 4,854
Total Cats: 8
Default

loki&y8s+1 cup=treated gears
Zabac is offline   Reply With Quote
Old 05-01-2008, 12:19 PM   #212
Elite Member
iTrader: (39)
 
Zabac's Avatar
 
Join Date: Sep 2007
Location: High Point NC
Posts: 4,854
Total Cats: 8
Default

been reading up on here and the associated links there, seems they went from using treated stainless to billet...now I have already shown how much I know about alloys, but what is the difference here...they also mention hardness to be Rockwell C 48-52 or something like that, so brittleness seems not to be the issue if the gears are hard enough.
My other concern is, how do I drop these in, supposedy I can just buy a new pump and drop them in, I have to have the pump machined to fit the gears to get the best oil pressure. Anyone know of a step-by-step for this or do I just go to local shop and open my butthole?
Zabac is offline   Reply With Quote
Old 05-01-2008, 01:28 PM   #213
Elite Member
Thread Starter
iTrader: (6)
 
Loki047's Avatar
 
Join Date: Sep 2005
Location: Chicago
Posts: 4,145
Total Cats: 0
Default

You suck at links. They are doing over kill with the 48-52. 25-29 is still going to be way too hard for our needs. They are just raping you.

Stainless is a bad idea in these kinds of situations.
Loki047 is offline   Reply With Quote
Old 05-01-2008, 01:35 PM   #214
Elite Member
iTrader: (39)
 
Zabac's Avatar
 
Join Date: Sep 2007
Location: High Point NC
Posts: 4,854
Total Cats: 8
Default

Expansion?
Zabac is offline   Reply With Quote
Old 05-01-2008, 02:23 PM   #215
Elite Member
iTrader: (15)
 
patsmx5's Avatar
 
Join Date: Aug 2007
Location: Houston, TX
Posts: 8,791
Total Cats: 247
Default

Lol, billet means a piece of wood or metal Dan. A piece of steel will work and do fine.
patsmx5 is online now   Reply With Quote
Old 05-01-2008, 02:37 PM   #216
Elite Member
iTrader: (46)
 
Stein's Avatar
 
Join Date: Dec 2007
Location: Nebraska
Posts: 4,812
Total Cats: 138
Default

Quote:
Originally Posted by Loki047 View Post
The metal is really gonna be the cheapest part of this, so I think we should splurge and get a non heat treated 28C alloy. I cant remember the name of it though. Easy as sin to machine and since its not heat treated you dont get some of the nasty effects

You are thinking of brake die. Generally 29-32 Rc. It would work fine without any case hardening. One other thought now that I have actually seen these gears is to use A2 tools steel without heat treating. Good toughness and hard enough, plus not really any more expensive than brake die but available in more sizes.
Stein is offline   Reply With Quote
Old 05-01-2008, 02:42 PM   #217
Elite Member
Thread Starter
iTrader: (6)
 
Loki047's Avatar
 
Join Date: Sep 2005
Location: Chicago
Posts: 4,145
Total Cats: 0
Default

Quote:
Originally Posted by patsmx5 View Post
Lol, billet means a piece of wood or metal Dan. A piece of steel will work and do fine.
Yeah according to dictionary.com, but really its used to describe the the process. FOr example the stock gears are not billet but the new gears will be billet
Loki047 is offline   Reply With Quote
Old 05-01-2008, 03:16 PM   #218
y8s
2 Props,3 Dildos,& 1 Cat
iTrader: (8)
 
y8s's Avatar
 
Join Date: Jun 2005
Location: Fake Virginia
Posts: 19,037
Total Cats: 406
Default

Quote:
Originally Posted by Stein View Post
You are thinking of brake die. Generally 29-32 Rc. It would work fine without any case hardening. One other thought now that I have actually seen these gears is to use A2 tools steel without heat treating. Good toughness and hard enough, plus not really any more expensive than brake die but available in more sizes.
I did a quickie look on mcmaster and saw the tool steels and they looked interesting. something like an S7 may also be noteworthy. designed for repeated high impacts and wear. sounds interesting. HRB 95ish.

is brake die just a high-carbon chromoly?
y8s is offline   Reply With Quote
Old 05-03-2008, 06:12 PM   #219
Elite Member
iTrader: (46)
 
Stein's Avatar
 
Join Date: Dec 2007
Location: Nebraska
Posts: 4,812
Total Cats: 138
Default

Drawings are done and will be scanned and emailed to y8s Monday. Jordan, PM me your email address so I can send them to you, too.

y8s, S7 world work fine as well. Back when I used to work for a living, we used to use A2 and S7 for all of the forming die components due to its toughness, whereas D2 would hold a better edge for punches and dies with less impact resistance.

One nice thing that I found when measuring the parts is the outer gear is .372" thick and the inner gear is .485" thick. Makes it nice to make from plate which will be .375" and .500" thick. Less machining means less built-in stress. I debated on plate vs bar, but with the quantities talked about here and the nominal thickness of the parts, plate will likely be the way to go. Both S7 and A2 will be available in preground thicknesses. Finish the thickness, mill around the boss on the inner gear, stack them up and wire EDM the gear profile = completed gears.
Stein is offline   Reply With Quote
Old 05-03-2008, 06:30 PM   #220
y8s
2 Props,3 Dildos,& 1 Cat
iTrader: (8)
 
y8s's Avatar
 
Join Date: Jun 2005
Location: Fake Virginia
Posts: 19,037
Total Cats: 406
Default

awesome john.

I think when bill made them he used slices of round stock that was bigger than the outer gear. plate's probably easier to purchase in moderate qty anyway.

hey i was going to ask you but didn't cuz you left for the weekend... do you guys do precision grinding of flat surfaces, say, for rolling ball bearings on?
y8s is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
OTS Bilstein to motorsports ASN conversion stoves Suspension, Brakes, Drivetrain 5 04-21-2016 04:00 PM
Moroso Air Oil Separator Catch Can Aroundcorner Miata parts for sale/trade 2 10-01-2015 04:20 PM
Walbro 255lph Fuel Pump $50 lsc224 Miata parts for sale/trade 2 10-01-2015 10:17 AM
Bad head gasket or ? shooterschmidty Engine Performance 8 09-30-2015 11:28 PM


Tags
oilpump gears

Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 10:28 PM.