Originally Posted by
Lille-bror
Hi KG
Old post, I know.
Yep, the 9901 are VERY good on my HPI/Force stock engine. So much better than Hong Nor 2047! Had to lean the HSN 1/3 and gained more than 1 minute extra runtime
Addition: Stock shim, OD77T plug, 20% nitro, 5 liter through her.
RE10 or JP3....I have tried about a dozen other pipes and none work as good....
Here is my 8 gallon old JL 21 on a JP3....the engine just howls on this pipe...tons of power across the entire RPM range....
http://www.youtube.com/watch?v=677bE6_te6w