Honestly, I thought the bottom end with the Volcano tranny was lacking
.
These say they fit in all HPI engines, which includes the Savage. The savage, and the Savage cluthbell fits the SH 18. So for 6 dollars, I think I will try one and see what happens.
Failing that, I'll get a
13T savage clutch bell (not from that store, their price sucks and they don't even have it in stock), and try that. If it STILL doesn't work, I think a
47T savage spur gear could be jammed into the Shockwave tranny with a little bit of dremel work, maybe even a few teeth larger. Then, with at least a 13T clutch bell and a 47T spur, it should be a little better.
EDIT: Also, a lot of people on RCUhave said that
this direct drive conversion from All About Fun Hobbies is an inprovement in both top AND bottem end, because its geared a little higher, and removes all the frition and rotational mass of the Volcano gearbox. It is a shockwave tranny and 13T bell, so I'd be inclined to think that a 13T bell could even work with the unmodified shockwave tranny.