the CL7B is the most powerful .21 XRC has ever dyno tested..it makes power better then most .28's.... As I say its a wicked platform engine.....I know the Sirio has very aggressive port timing which leaves little room for advancement....

either way I am just curious about this engines specs !!! no harm intented, i just want some tech info is all ...

maximo - our stroke is 16.6mm. post a picture of your head button. sirio has 6 different ones.

The new Trinity Ex Tech is awesome!

I dropped it in my losi truggy with a 2013 pipe and a p4 plug and was able to win Wolcotts Tri State champs by 3 laps over the field! during the 25 minute A main i pitted at about 8 mins but i surely could have went 10! Me and Joe allessi (also running the extech) pulled away from the field early in the race and developed a substantial lead over the pack.

Bottom end on this motor was tremendous! I didnt pop any wheelies but i did do a donut trying to nail it with the wheels turned!

Nice job!!!


Colin

nice! that might almost count as a wheelie!

whats with the servo plug hanging out of the body

That's just a Losi thing. Stuff hanging out in funny places LOL.

Looks like a runaway that's about to happen.

yes, its the charge line, forgot to secure it before the race... no big deal. most importantly, i didnt forget to charge the battery!

Chad, you said the stroke was 16.6, does sirio consider this long stroke? just that i am used to seeing 16.8 and abouve being titled as long stroke. are you familiar with the Siim engine, also sirio based with a stroke over 17, are these a 07 version and the EX Teck the 08 with a shorter stroke? I always ran sirio in onroad, they are solid motors, i would like to cary the ex tech but just wanted some version data, email me if you like, i would like to talk more in depth. Thanks Brian

sorry 16.9 on the siim engine

CL7B is also 16.9 mm