21vg, 30% nitro head shim
#4
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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.