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Mile High Puma
Samba Member
Joined: November 11, 2009
Posts: 235
Location: Salida, Colorado
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 Posted: Fri Dec 06, 2024 4:54 pm Post subject: Type4 barrel shims |
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Does anyone sell .030 barrel shims that cover more of the seating surface for the cylinders? The only ones I see for sale look like these and are fairly narrow.
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1965 Velvet Green DC
1990 Westfalia Syncro |
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Vanapplebomb
Samba Member
Joined: November 03, 2010
Posts: 5545
Location: Holland, MI
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| Posted: Fri Dec 06, 2024 5:41 pm Post subject: Re: Type4 barrel shims |
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That’s not too bad. As an alternative, if you have dished pistons, take 0.030 off the piston crown. That’s almost always a good thing on the dished T4 pistons.  What is your current piston to head clearance?
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1800 Type 4 Berrien 295
http://www.thesamba.com/vw/forum/viewtopic.php?t=487021 |
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Mile High Puma
Samba Member
Joined: November 11, 2009
Posts: 235
Location: Salida, Colorado
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| Posted: Fri Dec 06, 2024 10:36 pm Post subject: Re: Type4 barrel shims |
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Good option. Currently running .065 deck with 8.1-1 comp..
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1990 Westfalia Syncro |
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oprn
Samba Member
Joined: November 13, 2016
Posts: 14098
Location: Western Canada
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| Posted: Sat Dec 07, 2024 9:11 am Post subject: Re: Type4 barrel shims |
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Before you put shims in or after?
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Our cars get old, we get old but driving an old VW never gets old! |
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Clatter
Samba Member
Joined: September 24, 2003
Posts: 7714
Location: Santa Cruz
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| Posted: Sat Dec 07, 2024 9:33 am Post subject: Re: Type4 barrel shims |
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Maybe try them on a cylinder and see how they look?
The case register is wider than the seating surface on the cylinder.
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Last edited by Clatter on Sat Dec 07, 2024 1:09 pm; edited 1 time in total |
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Zed999
Samba Member
Joined: March 04, 2018
Posts: 1341
Location: UK
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| Posted: Sat Dec 07, 2024 10:44 am Post subject: Re: Type4 barrel shims |
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Mine sit happily on just this after machining for 104's...
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Mile High Puma
Samba Member
Joined: November 11, 2009
Posts: 235
Location: Salida, Colorado
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| Posted: Sat Dec 07, 2024 11:47 am Post subject: Re: Type4 barrel shims |
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| oprn wrote: |
| Before you put shims in or after? |
That was after .040 shims. Since it is apart I was thinking i might drop
the deck height to .055 with .030 shims. That would raise my compression to
8.3 though, not sure I want to go any higher. It's pushing my 65 DC.
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1990 Westfalia Syncro |
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oprn
Samba Member
Joined: November 13, 2016
Posts: 14098
Location: Western Canada
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| Posted: Sat Dec 07, 2024 12:37 pm Post subject: Re: Type4 barrel shims |
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That’s about where I am at and I run regular gas with no problem at all. Another time I would go higher and run premium fuel.
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Clatter
Samba Member
Joined: September 24, 2003
Posts: 7714
Location: Santa Cruz
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| Posted: Sat Dec 07, 2024 1:11 pm Post subject: Re: Type4 barrel shims |
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What cam are you running?
That will determine your CR.
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Bus Motor Build
I have excellent news for the world...
There is no such thing as patina.
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Mile High Puma
Samba Member
Joined: November 11, 2009
Posts: 235
Location: Salida, Colorado
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| Posted: Sat Dec 07, 2024 4:17 pm Post subject: Re: Type4 barrel shims |
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| Clatter wrote: |
What cam are you running?
That will determine your CR. |
Putting in a Webcam "stock" 142. Could probably get away with more compression here at 7000' but never know when it will be at sea level, also running shortened 411 pipes with a 73-74 stock muffler. Did check the shims on the barrels and they fit better there, could use another 20% in width but it will do.
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1990 Westfalia Syncro |
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RWK
Samba Member
Joined: June 24, 2009
Posts: 1512
Location: S.W. MI
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| Posted: Sat Dec 07, 2024 7:44 pm Post subject: Re: Type4 barrel shims |
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PM me, I build custom ground shim's.
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Vanapplebomb
Samba Member
Joined: November 03, 2010
Posts: 5545
Location: Holland, MI
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| Posted: Thu Dec 12, 2024 8:07 am Post subject: Re: Type4 barrel shims |
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Personally, I would remove the 0.065 shim so the cylinder sits on the case, then set piston to head clearance to 0.040 by shaving the piston crowns back. 0.025 is nothing to take off. Plenty of meat up there for that.
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1800 Type 4 Berrien 295
http://www.thesamba.com/vw/forum/viewtopic.php?t=487021 |
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