hey man look the 2.5 its a good engine i bought my t maxx for 150 too but i bought it a 3.3 chassis and 3.3 bulkheads i bought my t maxxfor 150 it brought lst tires ..when i got my t maxx i still didnt know crap about rc so i thought that .15 could pull those massive tires also my truck never shifted so i really cant tell you much about my 2.5.....so then i blew my 2.5 it reached 300 degress!!! lol then i upgraded to my 3.3 while my 3.3 was in my lhs i did so much research on tuning engines, gears, and the balance on your car between the tires you got and engien......so while i had my 3.3 in my shop i bought some revo tires from a friend for 20.00 then i bought a second gear clutch because i later found out that my truck never shifted from there oni have loved my 3.3 especially whenshe goes to 2nd gear that thing flies!! so i think a 3.3 is an awsome engine i dont know what people are always talking about 3.3's they suck i really love my 3.3


heres the difference..

before..........