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Author Topic: LDA on an NA Pump?  (Read 15444 times)

Reply #15September 24, 2006, 07:48:48 pm

Giles@PerformanceDiesel

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removal of post
« Reply #15 on: September 24, 2006, 07:48:48 pm »
hi guys

yes u do have to cut one of the posts out inside the pump housing.
it's hardened steel so the pump needs to be taken apart completely.

if u don't romove the post the cover won't do very much.

Giles
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Reply #16September 24, 2006, 07:59:25 pm

sethyboy85

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LDA on an NA Pump?
« Reply #16 on: September 24, 2006, 07:59:25 pm »
shucks
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Reply #17September 24, 2006, 08:19:16 pm

klr650@

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LDA on an NA Pump?
« Reply #17 on: September 24, 2006, 08:19:16 pm »
Wait a minute. I just removed the NA top and put the LDA top without any problems. I didn't see a post in the way. Everything fit as far as I know. Before I put the LDA top on, I compared the 2 pumps internals and couldn't see any difference.

So what's everyone talking about it not fitting? Or did I miss something here.....
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Reply #18September 25, 2006, 01:45:42 am

fatmobile

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injection pump
« Reply #18 on: September 25, 2006, 01:45:42 am »
This is an NA pump.... click to make larger.

 There is a post jutting into the pump, near the governor shaft, the green arrow is pointing in the general direction.
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Reply #19September 25, 2006, 10:26:10 am

jtanguay

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LDA on an NA Pump?
« Reply #19 on: September 25, 2006, 10:26:10 am »
Sorry for all you dialup users, but these are nice pics of the boost enrichment device, and how it works  :o



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Reply #20September 25, 2006, 11:25:16 am

klr650@

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LDA on an NA Pump?
« Reply #20 on: September 25, 2006, 11:25:16 am »
So are you guys saying the LDA top will mount on the NA pump, but won't function correctly?
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Reply #21September 25, 2006, 03:09:24 pm

jtanguay

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LDA on an NA Pump?
« Reply #21 on: September 25, 2006, 03:09:24 pm »
I assume that it is possible.  Look at those intricate parts inside the pump... gives you a good idea of what the LDA is doing (it basically acts like a dynamic fuel screw, being able to increase/decrease fuel quantity)

In theory, you could set the fuel screw to maximum, but arrange the lda fuel lever to compensate, and stiffen the lda up.  (may require some shims on the inside of the pump)



Imagine that.  Bleed off pressure from your LDA for light town driving + fuel economy, or let all the pressure go to the LDA and have uber power!

Forgot to add.  In my pic I said to shim the lda lever... how about just bend it???
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Reply #22September 25, 2006, 07:43:54 pm

commuter boy

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LDA on an NA Pump?
« Reply #22 on: September 25, 2006, 07:43:54 pm »
Giles just did one for me today, 1.9 AAZ umwelt TD without the LDA, retrofitted with a 1.6 pump top.

Can't wait.  It's currently a slug with sub-par fuel economy.
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Reply #23October 16, 2006, 01:37:06 pm

Wills

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LDA on an NA Pump?
« Reply #23 on: October 16, 2006, 01:37:06 pm »
GILES? I don't know you but I could really do with your help on this matter, Can I actually retro fit the lda from a 1.6 td pump to a newer 1.6 td pump that does not have it fitted?
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Reply #24February 22, 2008, 02:05:39 pm

rabbitman

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LDA on an NA Pump?
« Reply #24 on: February 22, 2008, 02:05:39 pm »
Well, I have NA pump apart for putting a LDA on and I'm sure the long post needs to be wacked or the LDA would be nearly useless. It appears that for an NA the post is the full throttle stop and when you put an LDA on the little arm stickin' down becomes the stop, thus, you now have a movable stop. :)


Note the two posts sticking in, the long one needs to go.
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Watch: AGENDA, GRINDING AMERICA DOWN
Reply #25February 22, 2008, 05:41:58 pm

hamradio

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LDA on an NA Pump?
« Reply #25 on: February 22, 2008, 05:41:58 pm »
Hammer time!  8)

I may do this some day. :D  Too bad that post isn't threaded in or something.
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Reply #26February 23, 2008, 12:16:55 am

Baselyne

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LDA on an NA Pump?
« Reply #26 on: February 23, 2008, 12:16:55 am »
Can someone post a pic of the two tops side by side?

Hell, why not post the bottom side by side too...

This thread is a  really Nice read...Thanks to everyone!
so the final verdict is "Yes we need to remove that stopper"? Or no?
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Reply #27February 24, 2008, 05:40:04 am

dillenger1

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LDA on an NA Pump?
« Reply #27 on: February 24, 2008, 05:40:04 am »


Does anyone have an idea how to remove this without taking the pump apart?
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Reply #28February 24, 2008, 12:12:34 pm

rabbitman

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LDA on an NA Pump?
« Reply #28 on: February 24, 2008, 12:12:34 pm »
sweet pics! I will be pulling the guts out of my IP soon anyways (broken plunger :oops: ) so I'll wack it off w/ a grinder.
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'82 Rabbit, I put on a euro vnt-15, 2.25" DP, 2.5" exhaust, the result.....it whistled.

I removed the turbo, made a toilet bowl 2.5" DP, the result....it was deafening. Now it has a homemade muffler up front and a thrush in the rear, the result.....less loud.
Watch: AGENDA, GRINDING AMERICA DOWN
Reply #29February 24, 2008, 12:12:47 pm

diffdude

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LDA on an NA Pump?
« Reply #29 on: February 24, 2008, 12:12:47 pm »
What i did is take a dye grinder and grind the crimp on the outside of the pump. Then take a propane torch and heat up the aluminium around the pin. From the inside take a punch and hit the pin out towards the outside about half way. Then whan the aluminum cools it will seal back tite around the pin. Mine has been like that for about a year with no leaks.
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81 caddy 1.6 td, 2.5" turbo back, snow performance water/meth injection, and all the other usual mods.
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