Author Topic: govener mod on 1.6TD (Read 4590 times)

citigolf · « **on:** March 01, 2009, 05:59:49 am »

i have read the FAQ, does anyybody know of a more detailed "how to" on the Govener MOD. - pics would be good.

i dont want to take it apart till i know what im looking for

cherrs

theman53 · « **Reply #1 on:** March 01, 2009, 06:32:10 am »

This is about what it should look like when you get it back together. I went with more shims about 1/4" worth. Leave the smallest = idle spring and the middle = intermediat spring alone. Just do the big one. You can't really see it but there is a little E clip that holds everything together. Once you put the shims in it is very hard to compress the spring and put the clip on. I did one by myself without tools and one with some tools and the wife...much easier.

citigolf · « **Reply #2 on:** March 01, 2009, 10:11:28 am »

i can only see 2 springs??

theman53 · « **Reply #3 on:** March 01, 2009, 01:05:29 pm »

Its ABOUT what it should look like. It has been awhile since I have had it open. If I remember correctly the littlest spring isn't pictured and should be at the end where the floppy looking peice is. I know it is a technical term but the end on the right side of the peice.

Also if you do take it off scribe lines and take pictures of how the pump came apart, springs, arms, and basically anything to do with the top of the pump. That way you will be able to put it back the way it was and it will run correctly. If not it is a real guessing game.

gigaz2 · « **Reply #4 on:** March 01, 2009, 06:10:52 pm »

Quote from: "NoSurrenderAG"

I have a complete how to if you want it. It's the best one i've found and I followed it, mine works great. PM.

please do share

camboscams · « **Reply #5 on:** March 01, 2009, 06:16:16 pm »

Quote

please do share

I second that!

8v-of-fury · « **Reply #6 on:** March 01, 2009, 06:38:39 pm »

Quote from: "camboscams"

Quote
please do share

I second that!

Please. lol

gigaz2 · « **Reply #7 on:** March 02, 2009, 03:53:43 am »

many thanks, but I would only shim the big one.

gigaz2 · « **Reply #8 on:** March 02, 2009, 08:56:00 am »

not really, as they have different characteristics, the main idea of the governor is to create two different elongation VS force ramps.
shimming one of them changes only one of the ramps, that can be understood on the VE manual.
(or by working the governor by hand and feeling the different resistance profiles )

gigaz2 · « **Reply #9 on:** March 02, 2009, 10:41:01 am »

correct if we're talking about static operation, I'll try to find a graphic of length VS force from the governor to illustrate.

UnderPSI · « **Reply #10 on:** March 02, 2009, 11:19:04 pm »

The spring seat has a clip under it, the main and intermediate springs have their own spring rate and allowed movement.

anto · « **Reply #11 on:** March 03, 2009, 12:21:48 am »

As underpsi said the middle spring seat cant move...so shimming the main wouldnt be the same as shimming the intermediate the same amount.

gigaz2 · « **Reply #12 on:** March 03, 2009, 02:11:34 am »

Quote from: "UnderPSI"

The spring seat has a clip under it, the main and intermediate springs have their own spring rate and allowed movement.

exactly!

Quote from: "anto"

As underpsi said the middle spring seat cant move...so shimming the main wouldnt be the same as shimming the intermediate the same amount.

correct

there are two (very)different spring rates on the governor, when pulled by hand the small one bottoms out long before the main starts to compress

anto · « **Reply #13 on:** March 03, 2009, 03:24:38 am »

What does each spring control?

vanbcguy · « **Reply #14 on:** March 03, 2009, 09:15:13 am »

The best way I've been able to get it together in my head is like this:

- Idle spring is pretty straight forward - idle speed is where the governor is balanced against the tension of the idle spring. As soon as you go above idle, the idle spring is fully compressed and no longer functional

- Main spring, also pretty straight forward - main spring is uncompressed until you start getting to around 4K RPM at which point it starts cutting fuel off very quickly

- Intermediate spring - this is the tricky one... Ever notice how you can hold a really precise RPM on your diesel really easily without too much trouble? My understanding is the Intermediate spring "cushions" the throttle. The actual control collar movements involved between full throttle and zero throttle are so tiny you really don't want a direct connection to your foot. If you look at how much total movement is allowed by the intermediate spring versus how far the actual accelerator linkage can pull on the entire works, your foot can easily override the intermediate spring.

My favorite video to wrap my head around all of this: http://www.youtube.com/watch?v=6j0vrfaXPmw

If you watch how much movement there is due to the idle spring, and how much movement there is due to the main spring, and the compare that to the intermediate spring you can see the intermediate spring really isn't costing any power, or at least nothing that you can't easily overcome by putting your foot down a little further. What I think it is doing is making drive-ability a lot better... I think in the normal driving range (1500 to 3000 RPM) the intermediate spring should be partially compressed. If you start going uphill a little and the RPMs drop a tad it's going to add fuel, likewise if you start going downhill a touch and RPMs increase without a corresponding change in where your foot is at it will cut fuel a bit... Just small amounts, enough so you don't really notice but you DO notice how much easier it is to keep the car going at a particular speed versus a "touchy" gas motor.

It's always tough to get my head around how the whole accelerator thing works on a VE pump... Your foot really isn't connected to anything other than a bunch of springs - the pump knows what it's doing far better than we do!

Author Topic: govener mod on 1.6TD (Read 4590 times)

8v-of-fury

anto

anto