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Go .21 Engine Question

Old 02-16-2008, 09:12 PM
  #1  
gil_millan1
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Default Go .21 Engine Question

I have the Go .21 5 ports engine, and so far it runs great. i just have a question about shims. i am running 30% nitro fuel, and i dont know if i should remove or add any shims. i took apart the engine and i notice that it has 2 copper shims from factory. should i remove one?
Old 02-16-2008, 09:21 PM
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twomanytoys
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Default RE: Go .21 Engine Question

No just leave them. If you were to run 20% then you could take a shim out to raise the compression but running 30% keep the 2 shims. Thats why they come with 2 shims so you can adjust with % of nitro.
Old 02-17-2008, 02:33 PM
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Tree1
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Default RE: Go .21 Engine Question

The Go Tech engines come with a .2 shim and a .1 shim. They come from the fractory ready for 30% nitro.
Old 02-17-2008, 03:16 PM
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Vigilante212
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Default RE: Go .21 Engine Question

your supposed to add the shim thats in the box for break in.
Old 02-17-2008, 03:38 PM
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gil_millan1
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Default RE: Go .21 Engine Question

thank you all. i didnt know what was the purpose of the shim that came in the box. thank you.
Old 02-17-2008, 07:29 PM
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Default RE: Go .21 Engine Question

No Problem

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