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Using Vacuum Advance With FiTech Controlled Timing

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Sorry to take so long to answer.

Your best place to set rotor is just to the right of #1 cap position, but still on it, if it's a chevy or opposite side if it's a ford. MSD has a 1 page document with pictures to look at of where your rotor position should be, search the net it's easy to find. If you have an extra dist. cap - drill a hole in the cap in front of number 1 so you can see inside. Then with the wires on use your timing light to see where the rotor is pointing while the car is running. At idle without the vacuum hooked up the rotor should be on the right side but should still align but not perfectly. As you accelerate the rotor will move to the center of the cap terminal to make the best spk. Now for the VR setting - this is where the alignment is crucial - as you accelerate to 4000 rpm the rotor is going to move to the advance side if the #1 cap position as this happens use the handheld to either reduce the number you see until you have the rotor aligning as close to center of the caps terminal.

Now here's the problem as I see it - you will get spk scatter at low rpms say about 1300-1800 - you may get the 036 code for emi/rfi. It will come and go at least for me that is what happened. There's where I get my kick-back upon starting. That is my biggest problem with ECU timing. That's why I switched back to just fuel and no timing. For me the car starts with zero kick-back and I got hardly no popping out of the exhaust on gear shifts between  2500-3200 rpms. One other thing I have done to reduce the popping is to bring my breakpoint at 3000 rpm done to 2500. Breakpoints are found in the advanced tuning section.

One reason I bought the Sniper stealth is when you do their ignition timing - the instructions for Holley will have your rotor alignment almost always in the center of the cap terminal.

65-StingRay/Wayne

tony-muscle has reacted to this post.
tony-muscle

Check here for diagram and more info.

https://www.hotrodhotline.com/content/ignition-systems-rotor-phasing-article-msd-ignition

65-StingRay/Wayne

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