Barrel shims or copper head gaskets?

[Aerodude45]

Does it matter which you use?

[Dan_]

------>According to this link: <------- You only shim the head if it has been over cut with a fly-cutter...

Should shim the barrel...  They make stroker barrels with extra length that you cut down to set the deck height.  

I am rather sure the nickies come with the extra length.

[Dan_]

Try this link:

http://www.thesamba.com/vw/forum/viewtopic.php?t=458764

The other link pertained more to 2000cc motors...

[Dan_]

Great Plains are saying below you can use either shims or gaskets or both... 

 

What you can't do is stack the copper head gaskets.  (goes without saying)

My engine needed .33 inch to get the CR down to 7.5 so I had them made in one piece by Gene Berg.com, dint use any head gaskets.

If you still have any doubts, you should probably call Leonard or Steve Bennet at Great Plains...

VW PISTON & CYLINDER ACCESSORIES!

CYLINDER SHIMS
	Cylinder Shims are a must for most VW aero conversions. You need to run the correct compression ratio for the octane of fuel you plan to use.  Stock shims are available for all 90.5mm, 92mm and 94mm cylinders.  If you are going to use automotive fuel with our carburetor or an Ellison we strongly suggest the use of a fuel pump, electrical, mechanical or both.

92 X .020" Shims . . . $7.95 per set	92 X .030" Shims . . . $7.95 per set
92 X .040" Shims . . . $7.95 per set	92 X .060" Shims . . . $7.95 per set
92 X .090" Shims . . . $7.95 per set	92 X .098" Shims . . . $26.95 per set
92 X .177" Shims . . . $26.95 per set	92 X .256" Shims . . . $26.95 per set
94 X .030" Shims . . . $7.95 per set	94 X .040" Shims . . . $7.95 per set
94 X .060" Shims . . . $7.95 per set	94 X .098" Shims . . . $26.95 per set
94 X .177" Shims . . . $26.95 per set	94 X .216" Shims . . . $26.95 per set
94 X .256" Shims . . . $26.95 per set

COPPER GASKETS
	Copper cylinder heads gaskets can replace the cylinder shim or a thickness of a shims to reduce your compression ratio. These shims are .040" or .060" thick and are for use with 92mm or 94mm cylinders. The shims install between the top of the cylinder and the cylinder head. Example: If you require a total of .217" of cylinder shims for a 2180cc or 2276cc engine, you can use a .177" base shim and a .040" copper cylinder head gasket shim.
Copper Cylinder Head Gaskets $20.95 (Set of 4)  92mm x .040	Copper Cylinder Head Gaskets $20.95 (Set of 4)  94mm x .040
Copper Cylinder Head Gaskets $25.42 (Set of 4)  92mm x .060	Copper Cylinder Head Gaskets $25.42 (Set of 4)  94mm x .060

[Aerodude45]

Ok. I'll ask Scott Casler about it. I'm doing one of his conversions and trying to run 93 octane no-ethanol mogas in a 45 conversion. According to the plans I need to add .040" shims for a deck height of .100" in order to run anything other than 100LL. 

Thanks for the input! Drawings certainly help... Can never be too sure.