This is a mini build log of a lowly Traxxas 3.3 engine in building for my Jato. I’m pretty much doing anything and everything to this engine to get it to spool as quickly as it can and make a bit more power/rpm than it would bone stock.

Things staying stock:
cylinder head
bearings
standard type glow plug

Modified goodies:
Modified crankcase
Modified crankshaft
Modified crankshaft timing
Modified/lightened piston
OEM conrod swapped for Sirio 2.5/3.3 conrod
Modified liner timing
Boost port unshrouding at BDC
Smoothed exhaust port flow
Modified big block carburetor with 8mm choke

This engine was new and unrun, built from spare parts. I do not believe in using an EBIS system nor do I believe in lapping the piston. This engine will get broken in the traditional way using my own fuel blends proven to make superb running engines last a long time. If I could get a barstock piston made for it, I would have. Cast pistons are
not known for lasting a real long time, but I’ve yet to wear a 3.3 piston out...

When I have all of the timing changes made and degreed, I’ll post them for all to see.