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Successful N/A governor modders?
by
Brian Rages
on 08 Dec, 2007 19:30
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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...
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#1
by
snakemaster
on 09 Dec, 2007 03:35
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main spring for the n/a worked good on my 1.9 n/a it was very close to 90hp + a few other tweeks
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#2
by
935racer
on 10 Dec, 2007 10:52
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Yeah shim the main, I mod alot of the NA pumps because they are so damn slow :lol:
I shim them about .055".
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#3
by
professor
on 19 Nov, 2009 12:27
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#4
by
RabbitJockey
on 19 Nov, 2009 14:34
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giles has commented on this forum about the na pump before maybe i can find it
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#5
by
RabbitJockey
on 19 Nov, 2009 16:33
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#6
by
theman53
on 19 Nov, 2009 17:19
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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.
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#7
by
vanbcguy
on 19 Nov, 2009 18:02
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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.
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#8
by
Rabbit on Roids
on 20 Nov, 2009 08:24
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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.
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#9
by
Baxter
on 20 Nov, 2009 13:44
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#10
by
professor
on 21 Nov, 2009 15:20
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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
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#11
by
theman53
on 21 Nov, 2009 16:40
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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.
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#12
by
theman53
on 21 Nov, 2009 17:28
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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.
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#13
by
professor
on 22 Nov, 2009 04:58
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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
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#14
by
professor
on 24 Nov, 2009 09:24
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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?
