MustangWorks.com : Ford Forums - View Single Post - Total timing vs initial timing for max HP.

84LX89GT · 04-16-2003, 12:04 AM

This thread peaked my interest, so i did a little researching on the subject of removing the spout. We all know it is the signal to the TFI for when to fire the coil, but i got to thinking...."are there any negative effects to disconnecting the spout?"
This is what i found in an official Ford "PC/ED" - Powertrain Control and Emissions Diagnostic manual.
"The coil ON time, or dwell, for this system is thus entirely controlled by the SPOUT signal. - In the case that the SPOUT signal line opens from the PCM, the ICM will use the PIP signal to fire the coil. This results in a fixed spark angle and fixed dwell."

What this means is that the dwell is fixed....the same amount of time is given to saturate the coil from idle up to 6000 rpm or whatever you feel like revving to. If the coil fails to saturate in the primary, less secondary voltage is induced and spark intensity diminishes rapidly which could even cause a high RPM misfire. I don't think i'll be trying this trick, although it may still work.

04-16-2003, 12:04 AM	#22
84LX89GT Mustangs Join Date: Jul 2000 Posts: 1,938	Bad thing about removing spout connector This thread peaked my interest, so i did a little researching on the subject of removing the spout. We all know it is the signal to the TFI for when to fire the coil, but i got to thinking...."are there any negative effects to disconnecting the spout?" This is what i found in an official Ford "PC/ED" - Powertrain Control and Emissions Diagnostic manual. "The coil ON time, or dwell, for this system is thus entirely controlled by the SPOUT signal. - In the case that the SPOUT signal line opens from the PCM, the ICM will use the PIP signal to fire the coil. This results in a fixed spark angle and fixed dwell." What this means is that the dwell is fixed....the same amount of time is given to saturate the coil from idle up to 6000 rpm or whatever you feel like revving to. If the coil fails to saturate in the primary, less secondary voltage is induced and spark intensity diminishes rapidly which could even cause a high RPM misfire. I don't think i'll be trying this trick, although it may still work. __________________ 2005 Suzuki Hayabusa GSX1300-R 1980 Ford Thunderbird - 255 V8 ported heads, 5.0L ported stock headers, O.R. H-pipe and Flowmaster 2-chambers, dual roller timing chain hi-po Mack Truck hood emblem 1985 Mustang GT 5.0L T5, F-303, GT40p, headers, off-road h, flowmasters, MSD stuff, etc. Sold 02/06/04 1989 Mustang GT ET: 13.304@102.29 mph (5-24-03) Sold - 1998 Mustang Cobra coupe, 1/4 mile - street tires: 13.843@103.41 (bone stock)