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Engine Specific Info and Questions => IDI Engine => Topic started by: bigash on May 16, 2010, 12:41:34 am
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Hi I have found an AAZ injection pump but want to know what it is before I buy it. I want to be able to tune it so want to know if it has a star wheel or is the "joke" LDA etc. Can anyone tell me if its good for power gains or not as Im running the flat top pump at the moment.
Unfortunately my camera ran out of battery so was not able to get a picture, but I have the numbers that are stamped on it. They mean nothing to me. ???
450 494 348
433-2 BS4022
028 130 108 G
465 619516
22109
Any help would be much appreciated.
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i was under the impression that all AAZ pumps had a joke LDA..
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It`s not bosch num by Esi.best
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Most Bosch numbers start with 460... so the pump number is probably 460 494 348 .
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Yes it probably is 460 as the numbers were very hard to make out. If it has a "joke" LDA is it possible to fit the star wheel set up at all?
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If it has a perfectly flat top - you may run into problems
If it has a domed top of any kind - the LDA can be easily sorted.
I wouildn't worry about the lack of starwheel - I've yet to find anyone that worries about it in reality, virtual reality yes, real life no ;)
If you are bothered, you can lift the spring with a spacer (washer) to perform the same effect.
Here are some of the options.
Flat topped AAZ - 'joke LDA'
(http://i197.photobucket.com/albums/aa85/vwaldon/AAZpump_front.jpg)
Full eco - no LDA
(http://www.dieselvw.com/images/1vPump.JPG)
The pump you want - full LDA, no extra electrics
(http://www.dieselvw.com/images/RebuiltTurboPump1.jpg)
I know it's a renault pump but it looks the same.
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Ok thanks. Looking at your top pic of the flat top LDA, the pump I have ATM looks like this but without the actuator thingy at the top right of the pic. Excuse my stupidity but this is the first diesel I have ever attempted. I have built many powerfull petrol engines but this is my first diesel so any help is much appreciated.
I have put an AAZ into my VW van that used to have a petrol engine. I assume the actuator looking devise is for fuel enrichment as the boost rises. Mine does not have this which is worrying. I assume it would run lean when it boosts. I have my eye on another pump with a domed top. What I will do is take pics of what I have and the pump Im looking to buy. I dont want to buy something that wont do the job. If you could have a look that would be really helpful as I feel out of my depth ATM. Thanks for your help Reg.
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In the first picture the actuator on the top right is a vacuum fast idle pod. It has no effect on fueling except at idle.
You don't need to worry about running lean with a diesel. Lean is cooler but less power.
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Ok thanks. Like I said Im a new to this so need to learn. I will take pics of what I have asap then you will know what I have on my engine. Thanks for the reply. :)
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Happy to help :)
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Ive lost my lead to charge my camera >:( but have taken a few of what I have on my mates phone. Apologies for the poor pics.
Looking at the pump I was wondering if someone has removed the dome pump top and replaced it with a home made plate. It doesnt look like a factory part as it looks filed on the edges. I could be wrong and it may just be wear marks where its been touching the engine lid on the van(or its been filed for clearance of the lid).
Pump number is 460 494 336
http://i379.photobucket.com/albums/oo235/Big_Ash/Dieselfuelpump.jpg (http://i379.photobucket.com/albums/oo235/Big_Ash/Dieselfuelpump.jpg)
I hate technology! I cant work out how to post an image so Ive used photobucket. Hope Ive done it right and you can see it.
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That one basically does not have a LDA. I know the top cover you mean, it is actually genuine Bosch even though it looks like crap. We have a couple of them in the shop.
Hosting to photobucket is exactly what you need to do in order to post pictures
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Ok thanks. The pump I have my eye on is apparently from an AAZ and does have the domed top. Would this be more tuneable? I cant find a 1.6GTD pump anywhere so think this may be a compromise but its got to be better than the crap pump I have, right? Would this domed toped pump have a boost pin? Reg has said if it has a domed top then it can be sorted so shall I buy the pump then before someone else does? Its £125. Seems reasonable to me but what do I know!
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Some of the non functional LDA pumps have a dome shaped LDA. If it is threaded for the boost line banjo bolt then it has all the guts (usually).
Is this for an AAZ or 1.6?
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My engine is a AAZ 1.9.
Can a 1.6 pump be fitted to my AAZ as there is one for sale in the for sale section. It will cost a bit to post to the UK but if its the one to have Im ok with that. Ive copied the info. What do you think?
For sale - a modded 1.6 pump
Features:
the gov mod,
a 1.9 cam plate,
extended travel boost aneroid
tuned to support 24 psi up to 6100 RPM
resealed 15k ago
Motor is a standard 1.6 with a t3 that should have the HG changed.
Open to offers - located near Ottawa
Ryan
Or I have just found this one in the UK. I have searched the part number and worked out that this pump is for an SB engine fitted to a 1.6 Jetta I believe. Looks very much like the one Reg Cheeseman said to have.
http://cgi.ebay.co.uk/VW-Volkswagen-Passat-Diesel-Bosch-Fuel-Pump-Bargain-/390197103347?cmd=ViewItem&pt=UK_CarsParts_Vehicles_CarParts_SM&hash=item5ad98f4af3 (http://cgi.ebay.co.uk/VW-Volkswagen-Passat-Diesel-Bosch-Fuel-Pump-Bargain-/390197103347?cmd=ViewItem&pt=UK_CarsParts_Vehicles_CarParts_SM&hash=item5ad98f4af3)
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I wouldn't bother with a 1.6 pump then. Yes the LDA is a bit easier to tune but you can still make it happen with the 1.9 one.
They have different fueling curves as well as timing curves.
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One other clarification in case search leads someone here some day: the first picture in this thread is a pump of mine... and it doesn't have the "joke" LDA... it has "NO" LDA. ;)
Not the best picture but you can kind of tell the lid on the LDA is a completely flat plate... no slight dome to it. This is because there's nothing under there... no LDA guts, no nothing. Its off an early Canadian ECO Passat.
The "joke" LDA on the other hand has a slight dome to it and a pin with very little slope... ie ... the slope is a joke! However, at least it has the LDA mechanics and you can grind the pin a bit.
Some day we'll have to make the definite pump identification thread... so many models!
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@ Burn_your_money, thanks, so you think I should look for a 1.9 AAZ pump with the pin inside even though its a flat sided one and this will have a threaded boost line banjo bolt? Now this may seem a silly question to you but where is the boost line banjo on the pump. Having not seen one I dont know and if Im told where it is then I can ask the guy to look at his pump for this threaded bolt before I buy it. If its not threaded then what will it be? Then I can ask him to look for that too. Or do you think I should ask him to remove the domed top and tell me whats inside if he will do that?
My quest continues!
@ Vincent- thanks for the info. Your right a pump identification thread would be good as Im really struggling with this. I find the people on this site are amazingly helpful though. I have used other sites in the past and a newbie can be ignored.
Sorry for all the questions. Thanks everyone for your help. I feel I will find the right pump with your guidence eventually! ;D
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Notice the green arrow I've added to this picture
(http://img.photobucket.com/albums/v603/burnyourmoney/RebuiltTurboPump1.jpg)
On some (most) AAZ pumps the banjo bolt goes into the top of the LDA. If this is not threaded then there is nothing inside the LDA. If it has a nipple on it then the LDA has guts. 99 times out of 100 anyways ;)
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Sweet. Now I get it. Thanks for the pic. Armed with this info I shall search the UK for this type!
Most helpful thankyou