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

real old post.. lol... oh yeah i still use this engine as a backup... and it runs great... mine was modded buy clockwork... never ran a stock so i can't give a comparison... but i like it as a backup....