Successful N/A governor modders?

[Brian Rages]

Hi,
I'm doing a re-seal on my injection pump and thought it would be a good time to do a little hot-rodding.

I've read a lot on the "governor mod", but it seems like the method outlined in the FAQ is not the correct method for the N/A.

For the N/A, I want to shim the main spring?  Is this right?


Has anyone done this mod with good results?  Thanks!


In other news, I just ordered a GERMAN timing belt and tensioner...

[snakemaster]

main spring for the n/a worked good on my 1.9 n/a  it was very close to 90hp  + a few other tweeks  

[935racer]

Yeah shim the main, I mod alot of the NA pumps because they are so damn slow :lol:

I shim them about .055".

[professor]

the following process is the correct procedure for gov mod in NA pumps?

http://forums.vwvortex.com/zerothread?id=3107325

[RabbitJockey]

giles has commented on this forum about the na pump before maybe i can find it

[RabbitJockey]

this is what i have found for you... because i am so awesome

[theman53]

Jimfoo told me NOT to shim/remove the intermediate spring. He put a solid piece in there and it hurt drivability. I shimmed the Main spring about 1/4" or .250.... Maybe closer to .3"  Anyway, I had perfect results and wouldn't do it any other way. You try and let us know.

[vanbcguy]

There's absolutely no reason to shim the intermediate spring - it's total movement is like 2mm, you can easily overcome it with the throttle.  What it does is make the engine a whole heck of a lot more driveable.  People mistakenly think they're gaining something by shimming it since it seems like it can reduce fueling, but it's such a small amount just pressing the pedal down further takes care of that and then some.

The big long main spring is all you need to mess with.

[Rabbit on Roids]

Jimfoo told me NOT to shim/remove the intermediate spring. He put a solid piece in there and it hurt drivability. I shimmed the Main spring about 1/4" or .250.... Maybe closer to .3"  Anyway, I had perfect results and wouldn't do it any other way. You try and let us know.

i used 2 1/8 inch thick stainless nuts. fit perfect over the shaft. worked like a dream. and like him ^, i too wouldnt do it any other way, not with how good it works doing this.

[Baxter]

this is what i have found for you... because i am so awesome

 

Clown...

[professor]

this is what i have found for you... because i am so awesome

thks you're so awesome

Jimfoo told me NOT to shim/remove the intermediate spring. He put a solid piece in there and it hurt drivability. I shimmed the Main spring about 1/4" or .250.... Maybe closer to .3"  Anyway, I had perfect results and wouldn't do it any other way. You try and let us know.

I don't know what's mean "hurt drivability". Could u help me? thks

[theman53]

I believe that it is turning the pump into a on/off switch. Or at least there will be a varying dead spot in your pedal. It has been awhile but I think that is what Jimfoo said to me. I just know putting probably .300" of shim in the main spring made it go like a scalded goose with no problems otherwise.

[theman53]

I just remembered!
The spot in the middle was bad because he couldn't keep a steady speed. That was the biggest concern with the intermediate spring shim.

[professor]

I believe that it is turning the pump into a on/off switch. Or at least there will be a varying dead spot in your pedal. It has been awhile but I think that is what Jimfoo said to me. I just know putting probably .300" of shim in the main spring made it go like a scalded goose with no problems otherwise.

I just remembered!
The spot in the middle was bad because he couldn't keep a steady speed. That was the biggest concern with the intermediate spring shim.

thks man

[professor]

There's absolutely no reason to shim the intermediate spring - it's total movement is like 2mm, you can easily overcome it with the throttle.  What it does is make the engine a whole heck of a lot more driveable.  People mistakenly think they're gaining something by shimming it since it seems like it can reduce fueling, but it's such a small amount just pressing the pedal down further takes care of that and then some.

The big long main spring is all you need to mess with.

thanks
I will shim the main spring. 1 more question: for 1/4mile in NA diesel cathegory the better is shim the intermediate spring and the main or only the main?