123 Install Today - GETTING CLOSER..., PROGRESS: BAD MPS |
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123 Install Today - GETTING CLOSER..., PROGRESS: BAD MPS |
FlacaProductions |
Dec 14 2023, 09:50 AM
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#1
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Senior Member Group: Members Posts: 1,733 Joined: 24-November 17 From: LA Member No.: 21,628 Region Association: Southern California |
74 2.0 D-Jet
Heading to the garage now to start the install and my main, unresolved-in-my-brain question is if i need to hook up the vacuum line that is on my current stock distributor, on the 123. |
iankarr |
Dec 17 2023, 09:42 PM
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#2
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The wrencher formerly known as Cuddy_K Group: Members Posts: 2,510 Joined: 22-May 15 From: Heber City, UT Member No.: 18,749 Region Association: Intermountain Region |
Installing and setting to the green light basically just gets you to a point where the engine will run. Have you synchronized the distributor and the software? That can't be done at idle.
Here's a repost of the method Jake Raby recommended which worked great for me. – First, follow the directions for installation (using the green light), which will get you to a point where the car runs. (you seem to be at that point now). – Set a curve point for 8 degrees @ 1K RPM, a point for 27 degrees @ 3000 rpm and a point for 27 degrees at 5K. Load that curve into the 123 distributor. – Hook up a timing light, cap off the vacuum line and rev the engine to 3K RPM. I like to aim at the notch on the flywheel. Rotate the 123 until you’re showing 27 degrees BTDC @3K on your timing light and then lock the unit down. The app and dizzy are now synched and you’ve approximated a simple stock curve. Now the fun begins. Drive around and see if there are any flat spots in acceleration. Make note of the rpm’s where the power seems to dip. Add points there to fine tune the advance. You’ll probably need a little more advance a little earlier. You may also need to tweak your idle advance a bit until it runs smoothly. Of course the condition of your engine, altitude and a bunch of other factors come into play. |
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