17.5 vs 27t
#1
17.5 vs 27t
A lot of guys on here are saying 17.5 is slower than 27t. i know that racing trans am cars (4 cell, 17.5 or 27t), I ran a 58mm roll out. The car was as fast as any other on the track, yet came of at 145* F (0* timing). The only guy who had a better lap was up 1 tooth from me.
Just wondering what rollout and temp everybody is getting to with these motors...and lap time vs, 27t
Just wondering what rollout and temp everybody is getting to with these motors...and lap time vs, 27t
#2
I believe the 17.5 is faster
#6
Tech Elite
iTrader: (23)
A lot of guys on here are saying 17.5 is slower than 27t. i know that racing trans am cars (4 cell, 17.5 or 27t), I ran a 58mm roll out. The car was as fast as any other on the track, yet came of at 145* F (0* timing). The only guy who had a better lap was up 1 tooth from me.
Just wondering what rollout and temp everybody is getting to with these motors...and lap time vs, 27t
Just wondering what rollout and temp everybody is getting to with these motors...and lap time vs, 27t
#9
From what I have seen at the 120x60 track here...17.5 was overall slower in stock 1/12th than the well built CO27s... 17.5 was faster (slightly) on the straights, but it just didnt seem to cut it in the infield.... I think I am going to stick with a CO27 for now...
#12
Tech Regular
I think the whole 17.5 vs 27t thing comes down to the class that you're running. That being said, I think that everyone will agree that the two motors can run together in the same class and that's a big step in the right direction.
Things will sort themselves out for each class after a few big races. At a club level, I'll bet that more and more people run BL just because of the maintenance.
Things will sort themselves out for each class after a few big races. At a club level, I'll bet that more and more people run BL just because of the maintenance.
#13
I had been running a CO27 that I know is fast. What i find strange is that everybody keeps saying how they have no rip, but are fast on the straight. When we first tried the motors, the opposite was true. With the bigger gears out now, we are getting them to run fast on the straight. The thing i am wondering about is timing..what are you guys setting timing at??
Rollout is the mm of movement per revolution of the motor. Easy way to compare gearing between different cars and tire sizes.
Timing is the relation of the stator and rotor (or brushes and/or commutator and magnets) to each other. Changes the powerband and characteristics of the motor.
Rollout is the mm of movement per revolution of the motor. Easy way to compare gearing between different cars and tire sizes.
Timing is the relation of the stator and rotor (or brushes and/or commutator and magnets) to each other. Changes the powerband and characteristics of the motor.
#15
too bad it's less than a week until the race and you can't buy one of the two legal 17.5's yet...