Author Topic: Make your 1.9TD a faster car  (Read 174827 times)

Reply #15January 02, 2008, 07:40:18 am

jtanguay

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Make your 1.9TD a faster car
« Reply #15 on: January 02, 2008, 07:40:18 am »
Quote from: "dieselabstimmen"
Does any of this do any damage to the turbo or anything else?  Like when you remove the boost limiter switch?


it can.  as stated in the FAQ too much smoke = too high egt's = blown engine/turbo.  if driven carefully enough with the extra fuel/boost your engine can last a long time.  running a good synthetic engine oil always helps too.  most turbo failures are from using crappy oils that coke up from the super hot turbo.  small super hard (near diamond maybe???) pieces of carbon form from the super heat and are then sent through the oil system to do damage.

other problems include burnt valves/pistons from over-fueling. an EGT gauge is a good idea....


This is how we deal with porn spammers! You've been warned.

Reply #16February 19, 2008, 12:16:20 pm

jimfoo

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Make your 1.9TD a faster car
« Reply #16 on: February 19, 2008, 12:16:20 pm »
IMPORTANT NOTE about using a 1.6 boost pin in an AAZ pump!
Ok, from my not super accurate calcs as I'm using a 40 year old bathroom scale....
The pressure required to START moving the pin is
AAZ 2.4 PSI
Cummins 4.0 PSI

The pressure required to bottom out the pin is
AAZ 3.0 PSI
Cummins 11.9 PSI

So what I think would be best is an even stiffer spring, though maybe a tiny bit shorter if you are pushing over 12 PSI. But it shows that you really need to change springs out when replacing or modifying an AAZ pin!!!
I believe the 1.6 spring should be the same as the Cummins spring.
One other thing I found is that the Cummins spring should be opened up slightly at the bottom so that it fits over the steel sleeve at the bottom of the LDA, otherwise it might start rubbing off metal as it rides on the lip of it. I didn't take this extra compression into account in the above figures.
Jim
1966 Land-Rover 88" with 1.9 1Z which has been transformed to an M-TDI
TFO35 mechanically controlled VNT, IC , and 2.5" exhaust.
Driven daily

Reply #17August 10, 2008, 03:17:47 am

Torchd

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« Reply #17 on: August 10, 2008, 03:17:47 am »
So if i am modifying a 1.9TD pump, with the 1.6TD boost pin, should i use the spring from the 1.6 or the 1.9??

I noticed an indent on the membrane of the 1.6 boost pin, where is that indent suppose to be when it is in 1.6 pump and when its in 1.9 pump?

Jimfoo,

 i saw a thread here long time back, it gave proper details on make adjustments to a pump including the star wheel and other related stuff... would you have a link to that?

Reply #18August 10, 2008, 10:05:06 am

jimfoo

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« Reply #18 on: August 10, 2008, 10:05:06 am »
Sorry, I don't have a link to the starwheel stuff and my pump doesn't have one.
I would use the 1.6 spring because if your 1.9 spring was like mine, you would go to full enrichment as soon as you had any boost at all, kind of defeating the purpose and economy of the LDA.
Jim
1966 Land-Rover 88" with 1.9 1Z which has been transformed to an M-TDI
TFO35 mechanically controlled VNT, IC , and 2.5" exhaust.
Driven daily

Reply #19August 13, 2008, 03:11:13 pm

jefinabox

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« Reply #19 on: August 13, 2008, 03:11:13 pm »
Hi,

Thanks for the informative topic, I'm slowly on my way to getting some more performance from my 1.9td thanks to it.

As I've the 1.9 engine, would putting an injectof pump from a passat estate 1.6td be a performance boost? I figure it'd save me all the mofifying of the 1.9 pump.

Only thing is I don't know if the 1.6td passat has all the performance parts in the pump that I'd need, can anyone help me with this?

Thanks

Reply #20August 14, 2008, 02:04:14 am

jefinabox

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« Reply #20 on: August 14, 2008, 02:04:14 am »
aye, I've done both hose as well as remove the boost limit switch and it's a great improvement. I was wondering if the 1.6td passat pump had the profiled boost pin i want, and a bigger plunger?

I want to do the governor mod too and i'd be easier doing it on a pump out of the car I think. If the passat pump doesn't have the boost pin I want I'll keep the 1.9pump and modify that.

Reply #21August 14, 2008, 02:13:39 am

jimfoo

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« Reply #21 on: August 14, 2008, 02:13:39 am »
Plunger would be the same, but the boost pin would actually have a profile. The nose is a different length though, so it wouldn't line up without swapping brackets as well. You could just swap pins and springs though.
Jim
1966 Land-Rover 88" with 1.9 1Z which has been transformed to an M-TDI
TFO35 mechanically controlled VNT, IC , and 2.5" exhaust.
Driven daily

Reply #22August 14, 2008, 09:57:10 am

homerj1

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Re: Make your 1.9TD a faster car
« Reply #22 on: August 14, 2008, 09:57:10 am »
Quote from: "VWRacer"
[Note: Some time ago I saved this page off the VWQuebec Forum. The link now appears dead, but it is such a great DIY article I thought I'd cross-post it here. If you want to keep this info I suggest you save the page to your hard drive, just in case someone gets upset that it is here and asks that it be taken down. Anyway, I stripped out all the VWQuebec forum stuff and am posting just the pics and unedited text. If you have questions I suggest you open another thread. That way the experts can answer them and we don't lose the info if this thread has to come down. Stan]

Preparation of the engine before increasing the fueling.



1. It is necessary to unscrew the screws #1 and #2 and to withdraw the limit-switch. (you probably have a cover over), You can use tie-rap and fix the switch elsewhere (but it must remain open)

This modification makes it possible turbo to function full-time instead of compressing only when you ask for all the power.


I was playing around with the first 2 parts of this mod. and found that I didn't have to remove the limit switch.

There is a piece of metal on the throttle assembly (by the switch) that keeps the switch closed until you open up the throttle. I just bent this piece of metal back so the switch is open all the time regardless of throttle position. It saved me from having to loosen stuff and relocate the switch.

Aivars

Reply #23January 23, 2009, 04:07:24 am

Limey

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« Reply #23 on: January 23, 2009, 04:07:24 am »
will searching around to find out wtf "umwelt" is i stubbled apon these :D



1982 VW caddy
1993 Jetta TD

Reply #24January 23, 2009, 03:40:57 pm

Smokey Eddy

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Make your 1.9TD a faster car
« Reply #24 on: January 23, 2009, 03:40:57 pm »
That original thread is an awesome one.
Ed
Blacked out mk2 AAZ Jetta RIP. You are missed.
White 1999.5 ALH Golf 2dr. Low & wide. Rammed off the road RIP.
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Reply #25May 25, 2009, 09:37:23 pm

88jetta350

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Re: Make your 1.9TD a faster car
« Reply #25 on: May 25, 2009, 09:37:23 pm »
I understand that english is not the primary language in french canadia, but would it be possible to have someone re-write this properly? Some things had to be read 2 or 3 times to be understood properly.

Reply #26December 04, 2011, 10:20:32 pm

okron1k

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Re: Make your 1.9TD a faster car
« Reply #26 on: December 04, 2011, 10:20:32 pm »
the images are showing up broken for me.. i uploaded them to imgur if someone can add this link to the OP: http://imgur.com/a/Zrhqg

Reply #27September 18, 2015, 10:53:56 am

WeekendMechanic

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Re: Make your 1.9TD a faster car
« Reply #27 on: September 18, 2015, 10:53:56 am »
Sorry, I don't have a link to the starwheel stuff and my pump doesn't have one.
I would use the 1.6 spring because if your 1.9 spring was like mine, you would go to full enrichment as soon as you had any boost at all, kind of defeating the purpose and economy of the LDA.

I can find a boost pin quite easiely from ebay but where can I find a spring with the tension of a 1.6 spring?

Reply #28July 06, 2016, 05:08:45 am

gto

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Re: Make your 1.9TD a faster car
« Reply #28 on: July 06, 2016, 05:08:45 am »
Sorry, I don't have a link to the starwheel stuff and my pump doesn't have one.
I would use the 1.6 spring because if your 1.9 spring was like mine, you would go to full enrichment as soon as you had any boost at all, kind of defeating the purpose and economy of the LDA.

I can find a boost pin quite easiely from ebay but where can I find a spring with the tension of a 1.6 spring?

Bosch part number
Spring: 1 464 617 710 - 000
Pin: 1 463 123 470 - 000

I found these p/n on another thread/forum

 

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