FiTech EFI system
Whelp I'll be installing mine soon. Just wondering if anyone has used the timing control and just locked the distributor but not phased the rotor? I'll be running at least 22* at the crank. Maybe more. Total at 36 or under, I'm betting it'll like 34 most. Do I really need to phase the rotor for only 10-12* of timing? I don't believe the MSD rotor will fit my firecore. And I don't wanna try and modify it. So just looking to see if anyone has tried the timing without the rotor phased?
I am using the timing control.. with the mopar performance Mallory style distributor.. ( Can lock the advance out) I do not have an adjustable rotor.
Checking the phase with a timing light through the hole at idle and full advance rpm, it firing very close to the center point in the distributor cap.. I had purchased the rick ehlenberg adjustable rotor and tried it but found the stock position worked just fine.
I suggest trying the same method and then you can confirm for yourself that the plug is firing in proximity with the spark plug terminal.
from what I have read on the interworld and discussed with Fitech, you want the rotor tip to be close to the spark plug tower throughout the range of advance that your motor will see.( as controlled by the ECU)
For example---I locked my distributor at 14 degrees. My motor will operate between 14 and 34 plus about 12 more for " Vacuum" advance ( Vacuum Can not hooked up-- fitech system programmed to add more advance at high vacuum) So when the timing is in the middle of that range, at about 30-32 degrees, I wanted the rotor to be dead even with the spark plug terminal.
Then enabled the fitech timing.. Within their software controller, you tell it what you degree you locked your distributor at. Once it is running on their timing, you confirm that what the display on the handheld is showing for advance is what your timing light shows on the engine. After that you rev it up to say 2000 and again confirm that what the handheld says is the same as engine.. The VR advance 4000 setting, is used to adjust the fitech timing if their is a slight discrepancy at 4000 rpm. Again rev to 4000, compare timing light to electronic display.. If the handheld says 34 degrees and the timing light shows 36, you add 2 to the VR Advance 4000 setting.
Not a mechanic, but offering this up from what I have done so far..
Hope that helps..
Ken