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21vg, 30% nitro head shim

Old 01-20-2007, 08:49 AM
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gump
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Default 21vg, 30% nitro head shim

I have a 21vg and i want to run 30% nitro do i need to shim the head if so what is the part number? Thanks
Old 01-22-2007, 11:59 AM
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Bax
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Default RE: 21vg, 30% nitro head shim

You may need to add an additional cylinder head gasket. Just use a regular gasket from the standard gasket set. You'd need on only if you get detonation at full throttle. Detonation adds a "frying egg" sound to the engine's running.
Old 01-22-2007, 05:27 PM
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gump
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Default RE: 21vg, 30% nitro head shim

What about one thick shim from 23764010 it is the gasket set for the v spec
Old 01-23-2007, 12:42 PM
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Default RE: 21vg, 30% nitro head shim

We can only say to "try and see". Much depends upon exhaust system, tire size, gearing, and so on as much as the type of fuel used...and then you also have to consider glow plug and how you tune the engine. How well the engine cools is also a factor. We cannot tell you one way or the other. You have to find out by operating the engine and go from there.

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