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Old 07-27-2008 | 03:52 AM
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Grinder
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Originally Posted by sllo
how many shims should I use for the murnan modified red dot when using 16% nitro fuel?
The engine comes with .6mm total shims under the head. This is good for 16% nitro. With the .6mm of shims = .35mm of actual head clearance. To use 20% nitro, I would increase the clearance to about .45mm, and for 30% I would increase the head to .55mm. This would equate to approximately .8mm of total shims under the head.
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