RCU Forums - View Single Post - Used ofna hyper .21 too rich? Help please!
Old 11-09-2008, 09:14 PM
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cltcrns
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Default RE: Used ofna hyper .21 too rich? Help please!


ORIGINAL: dacaur

Im pretty sure its just a normal hyper 21... not the 8 port or race one...

Fuel is O'donnell 20% racing fuel.
Plug im not sure of, it was one that came with the t-maxx, it was open but unused when i put it in.... could that make a big difference?
The plug makes a huge difference! All the Hypers I have seen regardless of what model they are seem to run the best when running 20% with an MC8 unless it is below 40 degrees outside then maybe go the MC59. The MC8 is a medium range plug, the MC59 is a hot plug, MC9 is a cold plug. When I run 30% I use the MC9 unless its below 40 degrees outside then I go with the MC8.