Author Topic: 1.6L Timing advance curve mod... (Read 23279 times)

Benjamin · « **Reply #30 on:** March 22, 2008, 01:02:58 pm »

how can you remove those, i tried but it dont work for me. :cry:

intrested about the OUT bolt wich is adjustable, where you bought it?

Greetz, Benjamin

Tuppence · « **Reply #31 on:** March 22, 2008, 01:25:41 pm »

Quote

Out-Bolt are also in different size, more or less flow trough the pump

That may be true, but I've tested five different out bolts on the same pump at the same RPM, and they produced the same pressure.

As far as removing the sleeve in the regulator to get the plunger and spring out, you can take a nail and grind the head eccentricaly to the size that will just fit inside the sleeve; clamp the nail in a vise, push the sleeve over the head, hook the sleeve from the back; it will pull out fairly easily.

blkboostedtruck · « **Reply #32 on:** March 22, 2008, 01:55:55 pm »

Hey guys,
i been going through this thread and have not found my answer?
i made a gage to monitor the pressure from my out bolt!
i noticed at idel i'm at 25psi and when it goes up it goes up to 80psi!
now should i increase my idel pressure to 40psi at idel?
any input would be great! it's aTDpump gov,mod and possibly a 8mm head timing is set at 1.05mm prolly will need to change that if i increase the internal pressure? let me know what you think?
thanks Duane

Vincent Waldon · « **Reply #33 on:** March 22, 2008, 02:08:07 pm »

Duane: this is the thread to read:

http://www.vwdieselparts.com/forum/viewtopic.php?t=5936

blkboostedtruck · « **Reply #34 on:** March 22, 2008, 03:17:04 pm »

so i bring my pressure up to 40psi at idle will do it? am i understanding that right?
Duane

Vincent Waldon · « **Reply #35 on:** March 22, 2008, 04:51:38 pm »

Quote from: "blkboostedtruck"

so i bring my pressure up to 40psi at idle will do it? am i understanding that right?
Duane

43.5 psi when the engine is at 1000 RPM... yup... or so says the thread. We'd need Bosch's ESItronic to know definitively I suppose. :wink:

Benjamin · « **Reply #36 on:** March 23, 2008, 02:20:48 am »

Quote from: "Vincent Waldon"

43.5 psi when the engine is at 1000 RPM... yup... or so says the thread. We'd need Bosch's ESItronic to know definitively I suppose. :wink:

Hellyeah, i searched for that but havent found it yet :cry:

Greetz, Benjamin

Tintin · « **Reply #37 on:** March 23, 2008, 07:49:40 am »

Playing with internal pressure are a direct effect on the pump timing, but unfortunately to read the internal pressure is a waste of time, it is not the way to adjust the timing.

Can import what pressure at idle it is does not say where are the timing, and not need a gauge to set the correct timing but unfortunately there are no easy way to monitor the timing.

1:bench test with proper tool.

2:Timing lamp but It's really hard.

3:Test road and/or engine noise.

Vincent Waldon · « **Reply #38 on:** March 23, 2008, 10:34:14 am »

My vote goes to "control what we can, and use our best judgment for the rest".

I don't have a test bench but I do have an oil pressure gauge and a tapped out bolt, so adjusting the pump to give the specified internal pressure at 1000 RPM is something I can control.... so I do. Only one variable for sure... but since I can actually control it I do.

Don't have a way to measure the advance curve (just yet!) so I use my judgment... play with the springs and shims.... listen to the engine... take notes... and expect to take 3 steps forward and a couple back every now and then.

blkboostedtruck · « **Reply #39 on:** March 23, 2008, 10:42:05 am »

well i did mine! at idel it increased to 30psi now i see how a tach is important doing this adjustment! i may have went too far? but now it peaks at 130psi!
but the idel sure smoothed out now! i'll watch it this week and see if i notice any milage change?
but you do need to know what RPM your at when adjusting this!
thanks Duane

carrizog60 · « **Reply #40 on:** March 23, 2008, 12:01:17 pm »

cant still understand the way to do the adapter out bolt...
the screen thing is making me nervous on doing this...
can someone clarify this and show a easy to do adapted bolt to a td pump?
thanks

carrizog60 · « **Reply #41 on:** March 23, 2008, 03:15:47 pm »

libby, i have read that topic many times...
sometimes say that the hole in the out have to remain the same,others just cut the hell out of it and other left the screen inside...

soooo,where am i? :lol:

blkboostedtruck · « **Reply #42 on:** March 23, 2008, 06:30:13 pm »

Quote from: "carrizog60"

cant still understand the way to do the adapter out bolt...
the screen thing is making me nervous on doing this...
can someone clarify this and show a easy to do adapted bolt to a td pump?
thanks

the screen thing inside may not bother it if it's not there? just that little hole in the side of the out bolt don't mess with! drill carefully directly on top of the head of the nut! start with a small drill bit! till you get to the size you desire for tapping threads ! if you mess up the screen just make sure you get it all out! your only using this bolt just for adjustments purposes and after your done put the normal one back in! hope that helps?
thanks Duane

carrizog60 · « **Reply #43 on:** March 24, 2008, 02:57:20 am »

Quote from: "blkboostedtruck"

Quote from: "carrizog60"
cant still understand the way to do the adapter out bolt...
the screen thing is making me nervous on doing this...
can someone clarify this and show a easy to do adapted bolt to a td pump?
thanks

the screen thing inside may not bother it if it's not there? just that little hole in the side of the out bolt don't mess with! drill carefully directly on top of the head of the nut! start with a small drill bit! till you get to the size you desire for tapping threads ! if you mess up the screen just make sure you get it all out! your only using this bolt just for adjustments purposes and after your done put the normal one back in! hope that helps?
thanks Duane

clarified :wink:

fatmobile · « **Reply #44 on:** August 10, 2008, 11:04:25 pm »

I adjusted my buddy's internal injection pump pressure because he was complaining of low MPG.
Using the Ferret 765 setup with my tach/timing light I saw, even after adjusting, that his pump wasn't advancing.
It just stayed at 12 BTDC,... right near that metal nub to the left of the TDC mark.
sooo adjusting the internal pump pressure isn't the end adjustment but I think it's where to start,.. before playing with springs.