Author Topic: GOVERNOR MOD  (Read 21264 times)

December 03, 2009, 07:27:01 pm

32 VALVES

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GOVERNOR MOD
« on: December 03, 2009, 07:27:01 pm »
Why is the thread for the mod not have pictures on it, I need pics before I dig into this pump.  I have a 1Z tdi motor with a AAZ turbo pump and need alittle more power up top mine seems to run out of steam..


03 Escalade on 24's
99 Audi A4 1.8tqm
82 VW caddy m-TDi
95 VW GTi 2.0 20v big turbo

Reply #1December 03, 2009, 09:51:06 pm

745 turbogreasel

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Re: GOVERNOR MOD
« Reply #1 on: December 03, 2009, 09:51:06 pm »
I happen to have this page open ;D
http://forums.vwvortex.com/zerothread?id=3107325

Reply #2December 04, 2009, 12:16:12 pm

Rabbit on Roids

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Re: GOVERNOR MOD
« Reply #2 on: December 04, 2009, 12:16:12 pm »
only shim the MAIN SPRING!!!

Reply #3December 05, 2009, 04:09:50 pm

vanbcguy

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Re: GOVERNOR MOD
« Reply #3 on: December 05, 2009, 04:09:50 pm »
only shim the MAIN SPRING!!!

X20000000000000!
Bryn

1994 Jetta - AHU M-TDI - Jezebel Jetta
2004 Jetta Wagon - 1.8T - Blitzen

Reply #4January 09, 2010, 10:27:27 pm

ScottyTD

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Re: GOVERNOR MOD
« Reply #4 on: January 09, 2010, 10:27:27 pm »
I was reading the thread on vortex and its very thorough and great pictures.  What I was wondering about was what do you mean by "only shim the MAIN SPRING", your not removing it but compressing it more right?    It shows a thick washer, could you just use a few small ones instead? 

Reply #5January 09, 2010, 11:00:40 pm

8v-of-fury

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Re: GOVERNOR MOD
« Reply #5 on: January 09, 2010, 11:00:40 pm »
I have read up a bunch on this, and also would like to know for absolute clarification, which springs get shimmed and why this is so.

I have heard that people shim the main, some shim the intermediate.. when each other swear against the opposite method.. Why?

Reply #6January 09, 2010, 11:07:09 pm

theman53

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Re: GOVERNOR MOD
« Reply #6 on: January 09, 2010, 11:07:09 pm »
x 3  .....



It is missing the littlest spring in the pic, but the biggest spring on the left is the main spring. Put 1/4" of washers in it and let it rip. If you shim the other springs you will have driveability issues. If you shim/eliminate the intermediate spring it will have dead spots in the middle RPM ranges and have weird pedal feel on hills. JUST SHIM THE MAIN SPRING AND BE HAPPY :D. Good luck.

Reply #7January 09, 2010, 11:11:07 pm

8v-of-fury

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Re: GOVERNOR MOD
« Reply #7 on: January 09, 2010, 11:11:07 pm »
Lucas, it looks as though the main spring controls over all fueling? whereas the other two have there own area of fueling?

what is the main springs job in the governor? to allow slow linear rise of fueling? shimming it makes it a quicker rise? What if you go bigger than 1/4"? better or worse?

Reply #8January 09, 2010, 11:33:15 pm

theman53

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Re: GOVERNOR MOD
« Reply #8 on: January 09, 2010, 11:33:15 pm »
more than 1/4??? Never tried it really.Well mine was probably 5/16. I heard some have  just put a solid piece in there???

What I noticed was when you mash it in first you had to shift before you thought it was going to blow. 2nd same, 3rd same. It would keep pulling as long as the rpms were still climbing. 4th and 5th usually were way over the speed limit and still pulled well, not quite as good as the lower gears.

From what I gather the main spring compresses a little on low RPM, but mainly it is the higher RPMs that it affects. I never had a tach, but I am guessing about 2,500 the main spring starts to limit fuel and will continue until 4,800-5,300. Then I don't believe your engine will rev anymore because of lack of fuel. You should feel it when driving that you lose power even though the engine keeps spinning faster. When you mod it it will go until valve float...or at least that is what is sounded like to me.  ;)

Reply #9January 09, 2010, 11:53:54 pm

RadoTD

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Re: GOVERNOR MOD
« Reply #9 on: January 09, 2010, 11:53:54 pm »


From what I gather the main spring compresses a little on low RPM, but mainly it is the higher RPMs that it affects. I never had a tach, but I am guessing about 2,500 the main spring starts to limit fuel and will continue until 4,800-5,300.

Does the main spring really start at that low RPM? I remember seeing a dyno comparison between a stock pump and Giles (N/A 1.6) and IIRC, the curves were very similar until about 1000rpm before he backed off. Maybe the main spring came on too smoothly and I didn't notice what I wasn't looking for?

I'll see if I can dig it up again...

*Edit* Found it here... http://www.vwdiesel.net/forum/index.php?topic=14734.15

Looks to me like the main spring kicks in around 3300rpm on that stock 1.6... might be closer to 2500 on a 1.9. I'd better get on that gov mod for my car! :)
« Last Edit: January 09, 2010, 11:59:27 pm by RadoTD »

enough boost is when you have 3 dimple marks in the hood from the valve cover nuts..  ;D

Reply #10January 10, 2010, 12:04:13 am

ScottyTD

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Re: GOVERNOR MOD
« Reply #10 on: January 10, 2010, 12:04:13 am »
wow Theman53 thanks for the clarification !!!!

Reply #11January 10, 2010, 02:24:56 am

wolf_walker

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Re: GOVERNOR MOD
« Reply #11 on: January 10, 2010, 02:24:56 am »
As I read it the Bosch book says above idle the intermediate spring is the one in play.
It's really a beautiful system.
Many things we do naturally become difficult only when we try to make them intellectual subjects. It is possible to know so much about a subject that you become ignorant.
Mentat Text Two

Reply #12January 10, 2010, 02:31:04 am

8v-of-fury

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Re: GOVERNOR MOD
« Reply #12 on: January 10, 2010, 02:31:04 am »
As I read it the Bosch book says above idle the intermediate spring is the one in play.
It's really a beautiful system.

See! mixed answers LOL! I think we need a definitive answer here.. :P Bosch says its the intermediate spring, but people have luck with the main? weird eh?

Reply #13January 10, 2010, 07:55:03 am

theman53

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Re: GOVERNOR MOD
« Reply #13 on: January 10, 2010, 07:55:03 am »
yes above idle it is the intermediate spring doing much of the work...but you need it to. If you shim it or put a solid piece in it will cause driving issues. If you hold the pedal in one spot and the intermediate spring has a different load put on in *rolling hill for ex.* then your rpm will go up then down without moving the  pedal at all. It feels like you don't have a direct connection to the car it does what it wants. I suspect the firmer the intermediate spring the worse it would be.

MAIN SPRING FTW!!!

Reply #14January 10, 2010, 06:35:21 pm

vanbcguy

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Re: GOVERNOR MOD
« Reply #14 on: January 10, 2010, 06:35:21 pm »
Main spring is the high RPM cutoff, if you're trying to raise your fueling cutoff it's the one you want to shim (or even better find a stiffer spring!!)

Intermediate spring makes the car driveable.  Without it you'll have a REALLY hard time driving the car.  Its total movement is practically nothing compared to the main spring too so it really isn't "limiting" anything.

During normal driving the Intermediate spring is what is controlling the car - you NEED it to though.
Bryn

1994 Jetta - AHU M-TDI - Jezebel Jetta
2004 Jetta Wagon - 1.8T - Blitzen