fuel screw ECOdiesel

[ropadopa]

Had some down time at the shop and needed to get my daily driver in for some maintenance + mods.

Had to RR the complete shifter assembly , with a shorter throw shifter bar,  came out sweet,

since i had to take the exhaust down to get to the shifter box, Figured good time for that downpipe project, I have been collecting flanges pipes and bends to knock one out.

I will get some pics together in the next few days.

Which leads me up to my big Question


 Im making a 2.5 downpipe and will merge it into the oem exhaust just past the cat, car is all stock and  a strong driver. Only mod i have is a boost gauge and it reads 7-8 PSI max. I imagine that once i removed the  clogged up looking cat and down pipe it will free things up a bit.  IM not looking for max power.

Should i at least mess with the fuel screw a little?

[92EcoDiesel Jetta]

I don't know where flotida is but in some states, they started to physically checking for presence of the CAT and will fail you if you don't have one. In 92, VW sold diesels with CAT and without, one way around it is to get a core support from a non CAT car with the sticker that says "No catalyst".

[ropadopa]

I don't know where Florida is but in some states, they started to physically checking for presence of the CAT and will fail you if you don't have one. In 92, VW sold diesels with CAT and without, one way around it is to get a core support from a non CAT car with the sticker that says "No catalyst".

Florida , you know the sunshine state , No inspection here.

[Rising]

Well if you aren't looking for power then no don't touch it... But I don't think that's what you meant.

There is a thread in the sticky FAQ that talks about making your 1.6 a faster car and I believe it would be a good read for you if you haven't already.

From my understanding (of that thread and others)and experience our cars could use a little more fuel from the factory without need for much else in the area of modifications. However I wouldn't go too crazy on it until you get an EGT gauge (I like the auber instruments one, another favorite is the micro 1000 westach combo). And if you are building a downpipe I'd definitely recommend disabling the stock Bov, if you haven't already. That will allow more boost and thus the potential to add more fuel. As a rule of thumb I'd try maybe a 1/4 turn in and see if that starts you smoking but with usld you are gambling without gauges.

Moral of the story: if you want to increase power on your diesel you'll need to tweak that screw but you should have proper gauges first.

[ropadopa]

Thanks for the input, Got this in and it gave me 2-3 psi, hooked to the stock exhaust until i gather more pipe.  Looking at EGT set ups and really would lie to get a tach on it, before i goof wit hit any further. Between this and the shifter gig it was a success. thanks

Rising I have read up a bunch and  my model dose not have a BOV

[theman53]

The BOV  is actually called an overboost protection valve or something similar. I don't know which years got them but it is located on the intake manifold, on the left if looking from the front of the car. I know some of the newer cars did not get them, you maybe lucky.

[TylerDurden]

No BOVs on stock ECOs, as I recall.

I'd seriously consider a flex-pipe somewhere in there.

[ropadopa]

No BOVs on stock ECOs, as I recall.

I'd seriously consider a flex-pipe somewhere in there.

what for ? those things suck,  there was not one there from factory?

[TylerDurden]

The stock pipe flexes at the bowl union (that's why it isn't a flange).

[ropadopa]

The stock pipe flexes at the bowl union (that's why it isn't a flange).

noticed that,  I will keep an eye on it to make sure it dosent become a serious problem.,

[ropadopa]

had slinky nightmares all night,  lol

Fixed

 

[92EcoDiesel Jetta]

had slinky nightmares all night,  lol

Fixed

 

Nice! Is it stainless and what did you weld it with? How much work went into that?

[ropadopa]

Its, stainless. Mig, 5-6 hours.

[Jaceb-GLI]

Make me one of those for my 91 Eco

[TylerDurden]

Keep in mind the flex point may have optimal location... My WAG is it might be close to the manifold, where the original union is/was.