advanced timing pros and cons

[8v-of-fury]

Naw naw. I timed the 88 TD to 1.00mm and it was way to much. Anywhere under 35f was a 45 second cranking ordeal. Its now way way down from therr (didnt gauge it) as ivwent by ear while still just a fresh cold start. Starts perfectly regardless of temperature.

[bbob203]

Maybe if i finish pimping my glowplugs(wire up the e350 solenoid to the fuse box i have the plugs wired to.) the extra juice will help start it. If i hit the glow plugs a couple times makes cold start at this advance setting much easier. also if i pull out the c/s lever right as it fires off it helps. Seems like the advanced timing is great otherwise. above 35 or 40 it fires straight away. I also do have my idles set at 950+-25rpm and the cold start bump idle set at approx 12-1300 rpm.

[bbob203]

I just remembered I have a block heater duh!! I bet that will help..

[8v-of-fury]

Here is an idea, knock the timing back... There is no gain in having it up that high. If the engine cannot sustain combustion properly, what is it really helping with? lmao

[tyb525]

I know mine is above 1.00mm, and it fires 1st or 2nd revolution after glowing once. Even without the coldstart it will start down to 15deg (coldest I've started it), but won't stay running long unless I give it a little gas (diesel?).

[8v-of-fury]

It is all based on wear and tear. If you have a tired pump that cannot pop the injectors properly, advancing the timing will help "cover that up".

I see that you live in IN, you use the metric in your pump timing.. am I to assume "15deg" is also in Celsius? Or 15F?

If it will not stay running after you start it with out pedal, then you (or someone else ) has been messing with the pump settings lol. Turn in the pumps throttle stop, just enough to settle the idle. This will increase tension on the idle spring in the governor setup.

[tyb525]

With the CS engaged it will stay running just fine without touching the pedal, but if I don't have the CS pulled I sometimes need to feather the pedal for a few seconds after startup. I haven't tach'd the idle speed but it seems normal to me, after listening to several other 1.6 NAs idling...but I did have to adjust the idle speed slightly after timing.

I only used the mm measurement cause that's what the book uses and my dial is metric. As far as temperature it's Fahrenheit, I haven't memorized the Celsius scale lol.

[8v-of-fury]

If this is on your fuelly sig car, then you dont have an idle bump and you likely need some more advance if the CS smooths cold idle.

[tyb525]

Tomorrow is forecasted for below zero temps, with -25 F wind chill, we shall see how the rabbit starts without a block heater (haven't replaced it yet)

[bbob203]

what effect would a few degress of advanced cam timing have on a td?

[8v-of-fury]

Probably bent valves? These are interference engines, and I do believe that would be disastrous.

HOWEVER, I could be wrong.. but I do think the cam needs to be precisely timed to the the crank.

[TylerDurden]

I'm backing off my timing to .81mm after installing 145bar injectors... I was getting a fair amount of nailing even after timing to .84mm.

I only have 200 miles on the first tank, but it starts fine, runs much more quietly and it seems to have a bit more pull in 2500 - 4500 rpm range (maybe I'm imagining it? ).

[8v-of-fury]

Are these new/rebuilt injectors? (ie. are they all spraying properly and breaking at the same time?)

Interesting, so what.. my TD with 155bar injectors and 1.00mm is way too advanced for your ears lol  

[TylerDurden]

They are spraying good, popping pretty close - I pulled them from my 85/86TD.

http://www.vwdiesel.net/forum/index.php?topic=21926.msg309463#msg309463

[8v-of-fury]

Hmm, I do not usually take down mileage unless the car is doing unusually bad lol. I may have to adjust the 1.6's timing down down down and see what happens.

It was averaging about 900km for the tank all winter. Now you got me curious lol.. could it get better!?