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They fit, the ZZ motors are the same dimensionally as the OEM (3.0, 3.2, 3.8) motors so if you are used to jamming those in you should be able to get these to fit. I bent the retaining clip for the heatsink out a tiny bit, helps hold the motor in better. Just be sure the heatsink is hooked on the idler gear axle first, then snap it closed over the motor.
FYI did some tests on the 7' "track" (lineoleum).
Microsizer Celica 27MHz
Stock (orange 9.86:1) gears
Stock (soft slick) tires, scuffed
OEM 3.2 Motor ~ 1.6 secs
ZZ stock (1.6?) ~ 2.4 secs
ZZ Turbo (2.15) ~ 1.6 secs
ZZ NOS (2.35) ~ 1.6 secs
The ZZ upgrade motors are too darn close in "advertised" RPM, if I had more accurate timing there might be slight edge to the NOS. There is a definite diff in the first 1' between the OEM and ZZ motors, the ZZ motor hits full RPM immediatly, tall gears should prove this!
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