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Extreme VTEC
05-01-2001, 05:24 PM
I got a 15 Double Orion Chrome Touring Modified Motor. I notice that the rear end of the motor moves. Is this the timing setting?
I notice If I move it to one side the car gets really fast and if I move it to the other side then it gets slower. What effect does it haves on performance and to the motor if I move it?

Thanks in advance to all.
:) :rolleyes:

XXXER
05-01-2001, 06:40 PM
Well, i hope that they have #'s on them so that you can get a general idea of what the timing is set at, never use retarded timing(don't laugh, you are older than that) because it is not good to, that is going past the '0' in the opposite direction, and of course, the higher the degree you are running, the hotter your motor will be, the faster it will go, and the more maitenance will be needed, i keep mine in the 20* range

jeepinator
05-01-2001, 09:45 PM
Timing advance occurs when you rotate the endbell in the OPPOSITE direction the motor turns. Advancing the timing does a few things:
1) Increases power output (good)
2) Increases heat (bad)
3) Decreases efficiency (bad)
4) Decreases life of brushes and wears comm more (bad)

It is generally accepted that advancing the timing a few degrees is a good trade-off of the above characteristsics. I have learned over the years that the fewer turns a motor has, the more timing affects the performance. Also, it seems that the "bads" outweigh the "goods" more on lower turn motors. This means that an 18 turn motor may have an acceptable trade-off in the 15 degree range, where a 8 turn would be cooked with this much advance timing.
I am open to debate on this as I have no scientific analysis to back it up ... just my rather unscientific observations.

BTW, retarding the timing (moving the endbell in the direction that the motor turns) is NEVER good.

Railman
05-01-2001, 11:38 PM
jeepinator, You nailed it....this time! LOL :D
What you said about low turn motors is true because timing advance is done to compensate for the amount of time that it takes to fire the windings. It's all about the length of the wire & how long it takes for the current to get through it. Long wires need more advancement, short ones less advancement. Thats why voltage is such a big factor. Voltage is the pressure that pushes the current thru the wire. The higher the voltage the less time it takes to fire a coil, & the more rpm you get. Just my $.02 ;)

[ 05-01-2001: Message edited by: Railman ]