Anyone know any sources for lash caps for shim under bucket conversion? - Miata Turbo Forum - Boost cars, acquire cats.

Welcome to Miataturbo.net   Members
 


Engine Performance This section is for discussion on all engine building related questions.
Sponsored by:
Sponsored by:

Reply
 
 
 
LinkBack Thread Tools Search this Thread
Old 06-08-2011, 01:30 AM   #1
Junior Member
Thread Starter
iTrader: (8)
 
Join Date: Jul 2008
Location: Portland, OR
Posts: 397
Total Cats: 9
Default Anyone know any sources for lash caps for shim under bucket conversion?

I was just wondering if anyone out there had any lash caps(for shim under bucket conversion) or knew of a source like a racing team etc. Mazdaspeed in the US is out of stock of several thicknesses and has no ETA on new ones from Japan. Eddie from adrenaline racng has called Japan as well and thus far they have not been helpful. Supertech will make them but it would take 6-8 weeks.
I had read that the units for the toyota 4AGE would work but have to be machined and am looking into this.
Thanks for any help you can give

Last edited by kaisersoze; 06-08-2011 at 02:39 AM.
kaisersoze is offline   Reply With Quote
Old 06-08-2011, 01:45 AM   #2
Senior Member
iTrader: (12)
 
Join Date: May 2008
Location: Roselle, Illinois
Posts: 846
Total Cats: -35
Default

does anyone sell a shim over bucket conversion? if so how much?
Hot_Wheels is offline   Reply With Quote
Old 06-08-2011, 02:14 AM   #3
Junior Member
Thread Starter
iTrader: (8)
 
Join Date: Jul 2008
Location: Portland, OR
Posts: 397
Total Cats: 9
Default

Quote:
Originally Posted by Hot_Wheels View Post
does anyone sell a shim over bucket conversion? if so how much?
No one sells them because all stock miatas are already shim over bucket
kaisersoze is offline   Reply With Quote
Old 06-08-2011, 01:13 PM   #4
Elite Member
 
Join Date: Jul 2005
Location: Anacortes, WA
Posts: 2,476
Total Cats: 114
Default

Shim under bucket.

http://www.miataroadster.com/mazdasp.../i-407708.aspx

http://www.miataroadster.com/superte.../i-412161.aspx

You can also buy them through Mazda Motorsports. A few autocross results and you can open a racer account.

Bob
bbundy is offline   Reply With Quote
Old 06-08-2011, 01:27 PM   #5
y8s
2 Props,3 Dildos,& 1 Cat
iTrader: (8)
 
y8s's Avatar
 
Join Date: Jun 2005
Location: Fake Virginia
Posts: 19,038
Total Cats: 407
Default

you can also measure your lifter nipples and find another application that fits.

neogenesis2004 took some oversize ones and sanded them down to the size he needed.

rumors out there suggest you can also grind the valve stems.
y8s is offline   Reply With Quote
Old 06-08-2011, 01:44 PM   #6
Elite Member
 
Join Date: Jul 2005
Location: Anacortes, WA
Posts: 2,476
Total Cats: 114
Default

Quote:
Originally Posted by y8s View Post
you can also measure your lifter nipples and find another application that fits.

neogenesis2004 took some oversize ones and sanded them down to the size he needed.

rumors out there suggest you can also grind the valve stems.
The last head I rebuilt I had 3 heads worth of shims to play with. Still couldn’t make it exactly like I wanted. After doing careful measurement and calculating I took a few of the valves to a local machine shop that rebuilds heads and they perfectly took the right amount of material off the tip that I had calculated. It was easy.

Supertech valves come with slightly extra long tips. They are designed to be ground down to set the lash. The machine shop had a grinder with a micrometer built in for precision grinding for this purpose.

Bob
bbundy is offline   Reply With Quote
Old 02-04-2015, 06:29 AM   #7
Newb
 
Join Date: Apr 2014
Location: North wales UK
Posts: 40
Total Cats: 0
Default

I'm trying to find out what and where to buy my sub's. Can I just get the largest size of lash caps and then just get my head builder to machine them down to size? As I'm in the uk and shipping time can sometimes be lengthy. And I'd like to take everything to my head specialist to do all in one go.
chrisgtx is offline   Reply With Quote
Old 02-04-2015, 06:50 AM   #8
Senior Member
iTrader: (1)
 
Join Date: Jun 2006
Location: Sweden
Posts: 1,391
Total Cats: 58
Default

Quote:
Originally Posted by chrisgtx View Post
I'm trying to find out what and where to buy my sub's. Can I just get the largest size of lash caps and then just get my head builder to machine them down to size? As I'm in the uk and shipping time can sometimes be lengthy. And I'd like to take everything to my head specialist to do all in one go.
SUBs can be Supertech, Mazda Motorsport, Ford Zetec, and there might be others 30mm that can be used.

If you place the lash caps on the valve stem (not on the SUB tip) you can use whatever source you want for 6mm caps. There are plenty in the UK.

The material and dimensions matter, not the badge of the cars it was meant to be used in.

I use Mazda Motorsport SUBs (bought through Miataroadster) with generic lash caps, but there are many other combinations that work.
NiklasFalk is offline   Reply With Quote
Old 02-04-2015, 08:20 AM   #9
Junior Member
 
guttedmiata's Avatar
 
Join Date: Sep 2012
Posts: 438
Total Cats: -3
Default

I did mazda lifters and ST lash caps from miataroadster. No matter what some grinding will need to be done if you want the lash correct on all 16. The only negative to buying a full set of overly thick ones, is you'll have to pay the labor for all of them to be adjusted.
guttedmiata is offline   Reply With Quote
Old 02-05-2015, 07:24 PM   #10
Newb
 
Join Date: Apr 2014
Location: North wales UK
Posts: 40
Total Cats: 0
Default

Thanks for that,i think a phone call to my head builder is in order,see if he can get hold of some 6mm ones.
chrisgtx is offline   Reply With Quote
Old 02-05-2015, 10:38 PM   #11
Senior Member
iTrader: (2)
 
williams805's Avatar
 
Join Date: Oct 2013
Location: Goleta, Southern California
Posts: 510
Total Cats: 25
Default

Most newer motorcycle engines are this design. If you know the outer diameter and roughly the thickness range you are looking for, you could buy a Hotcams kit. Comes with all sorts of shims, like this:
Dirt Bike HOTCAMS Valve Shim Kit | MotoSport

I don't know for a fact they make them in the correct sizes but it's worth looking into.

Edit: Nevermind, these will not work.

Last edited by williams805; 02-06-2015 at 09:35 AM.
williams805 is offline   Reply With Quote
Old 02-06-2015, 12:54 AM   #12
Elite Member
iTrader: (5)
 
Join Date: Oct 2007
Location: Canton, Ga
Posts: 1,707
Total Cats: 19
Default

Good luck getting the sizes you want from ST. They only keep "whatever" on hand. Im having my machinist grind mine for a bajillion hours of labor.
Stealth97 is offline   Reply With Quote
Old 02-06-2015, 07:31 AM   #13
Senior Member
iTrader: (1)
 
Join Date: Jun 2006
Location: Sweden
Posts: 1,391
Total Cats: 58
Default

Quote:
Originally Posted by williams805 View Post
Most newer motorcycle engines are this design. If you know the outer diameter and roughly the thickness range you are looking for, you could buy a Hotcams kit. Comes with all sorts of shims, like this:
Dirt Bike HOTCAMS Valve Shim Kit | MotoSport

I don't know for a fact they make them in the correct sizes but it's worth looking into.
Are you sure those are "caps" and not simple pills/shims (with no provision for staying on the valve stem)?
Some of them look really thin and you need a decent "skirt" for them to stay in place. And they focus on the OD being right, makes me think it's supposed to fit in some bowl or similar.

Some stolen images to make things very clear.

Supertech Lash caps (5.5mm, but 6mm have the same design):

Usage


Some machining required but one of several sources in the UK http://www.burtonpower.com/shim-160-...c-e-fz215.html
Attached Thumbnails
Anyone know any sources for lash caps for shim under bucket conversion?-supertech_lash_caps_sp.jpg   Anyone know any sources for lash caps for shim under bucket conversion?-0607em_13_z-engine_assembly-lash_caps.jpg  

Last edited by NiklasFalk; 02-06-2015 at 07:47 AM.
NiklasFalk is offline   Reply With Quote
Old 02-06-2015, 08:19 AM   #14
Junior Member
 
guttedmiata's Avatar
 
Join Date: Sep 2012
Posts: 438
Total Cats: -3
Default

Quote:
Originally Posted by Stealth97 View Post
Good luck getting the sizes you want from ST. They only keep "whatever" on hand. Im having my machinist grind mine for a bajillion hours of labor.
Ordered probably 10 different thicknesses within the last two weeks and they had all of them ready to ship the next day.
guttedmiata is offline   Reply With Quote
Old 02-06-2015, 09:34 AM   #15
Senior Member
iTrader: (2)
 
williams805's Avatar
 
Join Date: Oct 2013
Location: Goleta, Southern California
Posts: 510
Total Cats: 25
Default

What I posted were only shims. I didn't relize the caps needed here actually hugged the top of the valve.
williams805 is offline   Reply With Quote
Old 02-10-2015, 11:47 AM   #16
Junior Member
 
Join Date: May 2010
Location: Tampa, Florida
Posts: 131
Total Cats: -40
Default

So what's the typical cost to have SUB's installed on a 99+ engine head? A ball park number would be nice.
my97miata is offline   Reply With Quote
Old 02-11-2015, 07:35 PM   #17
Newb
 
Join Date: Apr 2014
Location: North wales UK
Posts: 40
Total Cats: 0
Default

I'm looking at a set off miataroadster for $210 ish plus p and p. then it's a case of getting the right shims which I'm sure your head builder will be able to sort out.
chrisgtx is offline   Reply With Quote
Old 02-11-2015, 08:17 PM   #18
Elite Member
iTrader: (5)
 
Join Date: Oct 2007
Location: Canton, Ga
Posts: 1,707
Total Cats: 19
Default

Figure $200 or so for lifters, another $150 In shims, plus labor. Another $200-$300 for springs if you want to upgrade them.
Stealth97 is offline   Reply With Quote
Old 02-14-2015, 08:02 AM   #19
Junior Member
 
guttedmiata's Avatar
 
Join Date: Sep 2012
Posts: 438
Total Cats: -3
Default

Shims are less than $100.
guttedmiata is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
1994 Spec Miata Race Car SM/SM2/SSM For Sale Quinn Cars for sale/trade 6 10-23-2016 08:58 AM
OTS Bilstein to motorsports ASN conversion stoves Suspension, Brakes, Drivetrain 5 04-21-2016 04:00 PM
LucaCarMods's Boosted Dutch Miata Build! LucaCarMods Build Threads 11 02-14-2016 07:13 AM
Teflon cap for end of Clutch slave piston thumpetto007 WTB 10 10-21-2015 12:20 PM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

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 07:17 AM.