Fitech EFI Timing Control Help Request
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Joined: Nov 2016
Posts: 242
From: Oklahoma City, OK
Fitech EFI Timing Control Help Request
1969 442
455, unknown camshaft, very lumpy, definitely not stock.
10" Hg max at idle, no vacuum leaks
Fitech Go-EFI 4 (30002) with FCC
Situation:
Ran OK for 2+years with no issues. I'm switching from vacuum advance to Fitech controlled timing. I've replaced the distributor with a MSD Chinesium clone (Pro-Comp) with locked out the advance. MSD adjustable rotor. I've switched timing control to VRCOIL on the hand-held and recorded it to the ECU. I've identified TDC and set the distributor to 10" BTDC, and set that in the hand-held as well. It runs. But it needs to run better.
What I need:
I need advice on how to get this thing dialed in. Suggestions, tips, tricks. I am working hard to get the rotor phased but I find myself without a second cap to cut a hole in for visual proof to see the sweep across the terminal. But what other settings should I consider in the hand-held? The Fitech documentation is thin. Does anyone have any written steps?
455, unknown camshaft, very lumpy, definitely not stock.
10" Hg max at idle, no vacuum leaks
Fitech Go-EFI 4 (30002) with FCC
Situation:
Ran OK for 2+years with no issues. I'm switching from vacuum advance to Fitech controlled timing. I've replaced the distributor with a MSD Chinesium clone (Pro-Comp) with locked out the advance. MSD adjustable rotor. I've switched timing control to VRCOIL on the hand-held and recorded it to the ECU. I've identified TDC and set the distributor to 10" BTDC, and set that in the hand-held as well. It runs. But it needs to run better.
What I need:
I need advice on how to get this thing dialed in. Suggestions, tips, tricks. I am working hard to get the rotor phased but I find myself without a second cap to cut a hole in for visual proof to see the sweep across the terminal. But what other settings should I consider in the hand-held? The Fitech documentation is thin. Does anyone have any written steps?
Last edited by Bryan Burch; Jan 27, 2020 at 06:03 PM.
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Joined: Feb 2014
Posts: 2,590
From: Gillespie County, Republic of Texas
Just follow some conservative guidelines.
First, and throughout your adjustment of initial advance, be sure your total timing stays at 35° or less.
A lumpy cam may idle better with lot of initial advance, perhaps 20°. See what it likes.
Keep your vacuum advance conservative, start about 10° coming in above 15 inches.
Make small changes against the clock and listen carefully for knock.
First, and throughout your adjustment of initial advance, be sure your total timing stays at 35° or less.
A lumpy cam may idle better with lot of initial advance, perhaps 20°. See what it likes.
Keep your vacuum advance conservative, start about 10° coming in above 15 inches.
Make small changes against the clock and listen carefully for knock.
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