love2fly
Flying the Mountains of the NW
Timing the engine with a vacuum gauge is something I have not done in many years. Usually run with ball on pointer (7deg BTDC). So correct me if wrong on my set up. Trying to gat a better fuel burn for emissions testing (CO%).
This is using one of Trollholes electronic dizzy on a 2F no emissions engine.
I did what is listed below but due to the caps clip on the dizzy I can not rotate it any further due to it hits the pushrod/lifter side cover.
It would to go even higher that 50 inch but that as far as it go's then hits the cover.
I took a picture of the timing mark with the strobe light but did not catch the ball so I put a mark representing were it is now at on timing.
Seems to run fine and on rattles, good power, not sure about any detonation taking place.
Also would this be around 12 degrees ATDC?
Thanks
1. Connect vacuum gauge to the brake boost vacuum hose in my case.
2. Disconnect the dizzy vacuum advance hose and plug.
3. Loosen the distributor for rotation.
4. Connect timing light and rpm gauge.
5. Start engine run @ 650 rpm (idle).
6. Turn dizzy while watching the Vacuum gauge needle move to its highest reading while advancing the dizzy.
7. When the highest reading on the Vacuum gauge is reached retard the dizzy back to one inch of vacuum lower.
8. Reset engine RPM and mixture to standards and snug dizzy nut .
This is using one of Trollholes electronic dizzy on a 2F no emissions engine.
I did what is listed below but due to the caps clip on the dizzy I can not rotate it any further due to it hits the pushrod/lifter side cover.
It would to go even higher that 50 inch but that as far as it go's then hits the cover.
I took a picture of the timing mark with the strobe light but did not catch the ball so I put a mark representing were it is now at on timing.
Seems to run fine and on rattles, good power, not sure about any detonation taking place.
Also would this be around 12 degrees ATDC?
Thanks
1. Connect vacuum gauge to the brake boost vacuum hose in my case.
2. Disconnect the dizzy vacuum advance hose and plug.
3. Loosen the distributor for rotation.
4. Connect timing light and rpm gauge.
5. Start engine run @ 650 rpm (idle).
6. Turn dizzy while watching the Vacuum gauge needle move to its highest reading while advancing the dizzy.
7. When the highest reading on the Vacuum gauge is reached retard the dizzy back to one inch of vacuum lower.
8. Reset engine RPM and mixture to standards and snug dizzy nut .