Correct Timing Spec.
Moderator: Fatmobile
-
bottleworks
- Cetane Booster
- Posts: 81
- Joined: Sun Sep 23, 2007 10:24 am
- Location: Pittsboro, NC
- Contact:
Correct Timing Spec.
When I reinstalled my injection pump, I set the injection pump timing to .88mm +- .06mm (Not 100% on the +-). I am seeing many on here are setting the timing to 1.0mm. What should be the correct setting for the pre turbo 1.6L injection pump?
1981 VW Rabbit Pickup
and an Additional 1981 VW Rabbit Pickup
"You may have to 'metaphorically' make a deal with the 'devil.' And by 'devil,' I mean Robot Devil. And by 'metaphorically,' I mean 'get your coat.'"
and an Additional 1981 VW Rabbit Pickup
"You may have to 'metaphorically' make a deal with the 'devil.' And by 'devil,' I mean Robot Devil. And by 'metaphorically,' I mean 'get your coat.'"
-
VWCaddy
- Missing Linkz
- Posts: 1116
- Joined: Tue Oct 22, 2002 11:44 pm
- Location: Northern California
- Contact:
The Bentley manual lists the timing settings for a variety of pumps. If 0.88 is working OK, that should be fine. The higher numbers are usually from the "improved performance" part of the table.
'82 VW Caddy, 1.9D engine, FN tranny w/ Quaife, Missing LinkZ shift linkage
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Fatmobile
- Global Moderator
- Posts: 7574
- Joined: Wed Oct 30, 2002 10:28 pm
- Location: north central Iowa
More advanced will make it noisey, sometimes too noisy.
I have been rotating the pump while the engine is running to listen to changes,... then using the dial gauge to see where it ended up.
I think each fuel system has it's own best setting,.. depending on things like breaking pressure of the injectors and pump wear.
I have been rotating the pump while the engine is running to listen to changes,... then using the dial gauge to see where it ended up.
I think each fuel system has it's own best setting,.. depending on things like breaking pressure of the injectors and pump wear.
'91 Golf gasser converted to a 12mm pump, M-TDI.
'84 1.6TD Rabbit with a VNT-15 turbo, still setup to run on vegetable oil.
'84 GTI with 1.7TD pistons and intercooled.
2003 TDI wagon
2000 TDI Jetta.
'84 1.6TD Rabbit with a VNT-15 turbo, still setup to run on vegetable oil.
'84 GTI with 1.7TD pistons and intercooled.
2003 TDI wagon
2000 TDI Jetta.
Each pump, doe to wear and age has a different personality. Hilbilly tuning is the best method for these old engines. My observations are...
1. pumps advance engine timing as rpm increase... (varies a lot)
2. Not all are the same.
3. a good pump with lots of advance will rattle like hell at higher rpm. You can definately hear it come in. I set my timing to the point where the rattle only appears at very high rpm (fully warmed up) .These leaves a smooth quiet engine at the rest of the power band.
4. If then engine smoke white /misses when cold, the timing is probably too retarded. In this state, pulling the cold start makes a big difference and really smooths things out.
5. If pulling the cold start knob has little effect when cold, you are close to ideal timing. If engine still runs crappy cold you have other problems like worn everything, old nozzles etc.
6. old worn pumps have little advance due to worn vane pumps, so set the timing that the engine runs well when cold. It will likely rattle good across the powerband, but thats the way its going to be.
7. The dial indicator spec is only a good starting point for fine tuning your pump, execpt with newer pumps.
8. nozzles nozzles nozzles...get new ones. makes a big difference in sound. Hard to time the engine by sound if the old nozzles make it rattle like hell.
Hagar is the king so ask him for advice.....
Bob
Bob
1. pumps advance engine timing as rpm increase... (varies a lot)
2. Not all are the same.
3. a good pump with lots of advance will rattle like hell at higher rpm. You can definately hear it come in. I set my timing to the point where the rattle only appears at very high rpm (fully warmed up) .These leaves a smooth quiet engine at the rest of the power band.
4. If then engine smoke white /misses when cold, the timing is probably too retarded. In this state, pulling the cold start makes a big difference and really smooths things out.
5. If pulling the cold start knob has little effect when cold, you are close to ideal timing. If engine still runs crappy cold you have other problems like worn everything, old nozzles etc.
6. old worn pumps have little advance due to worn vane pumps, so set the timing that the engine runs well when cold. It will likely rattle good across the powerband, but thats the way its going to be.
7. The dial indicator spec is only a good starting point for fine tuning your pump, execpt with newer pumps.
8. nozzles nozzles nozzles...get new ones. makes a big difference in sound. Hard to time the engine by sound if the old nozzles make it rattle like hell.
Hagar is the king so ask him for advice.....
Bob
Bob
1981 Caddy diesel 119K with working r12 A/C!
Freshly rebuilt engine .020 over, rebuilt 4 speed recently converted to a FN 5 speed, new control arm, ball joints, steering rack, engine mounts, clutch, clutch cable,flywheel, all brakes, brake cylinders, wheels, tires, Audiovox cruise control, HID Headlights, LED instrument lights.
Bob Jupiter, FL
Freshly rebuilt engine .020 over, rebuilt 4 speed recently converted to a FN 5 speed, new control arm, ball joints, steering rack, engine mounts, clutch, clutch cable,flywheel, all brakes, brake cylinders, wheels, tires, Audiovox cruise control, HID Headlights, LED instrument lights.
Bob Jupiter, FL
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hagar
- Hillbilly Tuner
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- Location: Near Lund B.C. Kanada.
Timing or TUNING ?--EH ?
OK OK you rattled hagars chain ---EH ?.
Your minuscule problems ----to decide TUNING or TIMING ? here is a proclamation from the KING.
READ and READ again ----it is ALL in the forums.
As I said many times I do NOT tell anyone , what to do ----ONLY what I do --yes hagar ---and the proof positive is right here at Fraulein Bunny Bondos burrow.---lair ?
hagar.
Your minuscule problems ----to decide TUNING or TIMING ? here is a proclamation from the KING.
READ and READ again ----it is ALL in the forums.
As I said many times I do NOT tell anyone , what to do ----ONLY what I do --yes hagar ---and the proof positive is right here at Fraulein Bunny Bondos burrow.---lair ?
hagar.