1.6 vs 1.9

[fspGTD]

Other threads discussing turboing a 1.6lNA:
http://www.vwdiesel.net/phpBB/viewtopic.php?t=1938
http://www.vwdiesel.net/phpBB/viewtopic.php?t=1699
http://www.vwdiesel.net/phpBB/viewtopic.php?t=556
http://www.vwdiesel.net/phpBB/viewtopic.php?t=243

[carrizog60]

Hum...unburned fuel rises temperature right?
in one topic from the ones that fspgtd(the 3 one) i think that raising the boost will kept egt down right?
my english is not the best so correct me if i understand wrong :?

[VWRacer]

Valter, don't worry about your English. Our Portugese is non-existent!  :wink:

Here are some simple rules for diesels...

1) The exhaust gas temperature (EGT) for a diesel is proportional to the amount of fuel injected. More fuel means higher temps.

2) Adding boost alone will not increase temps very much. Intercooling the intake air (after the turbo and before the cylinder) can cool off the air enough to actually lower EGTs.

3) Adding boost does allow more fuel to be burned efficiently. Adding more boost AND more fuel quickly rises EGT. This is where you need an EGT gauge.

Hope that helps!

[carrizog60]

so, how high can i out the boost without increasing the fuel?
isn t dangerous the engine running lean?

[Maarten]

How high depends on a lot of figures.. so I suggest you buy an EGT meter and then you know at wat temperatures your running.

A Diesel engine runs always lean, in normal operation from 1:20 to even 1:80.

[VWRacer]

so, how high can i out the boost without increasing the fuel?
isn t dangerous the engine running lean?

VW sold the 1.6TD Eco in the USA which had a turbo, but did not increase fuel with boost. I think its maximum boost was about 1 bar.

Unlike petrol engines, you don't have to worry about running a diesel lean. As Maarten says, they are very lean anyway. Also, the leaner one runs a diesel the cooler it runs, not hotter like a petrol engine.

[carrizog60]

so i can up the boost to 1 bar without moving the fuel right?
new to diesel...

[Maarten]

Stock boost is between 0,5bar and 0,8bar on all 1.6 and 1.6 TDs

[VWRacer]

Valter, your engine will only produce boost based on the size of the turbo and the amount of fuel injected. There is no "turning up the boost" on a diesel engine.

The Eco used a very small turbo (K14, I think). If you can find one of these, or another very small turbo, you might get a bar of boost from it. You will have to experiment with it to see what it will do.

[carrizog60]

i have a kkk24.
isnīt the boost regulated at the bov?
so, only turning the fuel the boost goes up?damn! :x

[VWRacer]

Sorry Valter...I didn't know what engine you have, since there is no info in your profile. Can you tell us more about the car/engine you are asking about? (Or did I miss it above?)

Anyway, with the K24 there are numerous things you can do to up the boost. You can block off the BOV, like this:



Or, if your officials won't permit that, you can be more clever, like this:



The green thing is just the plastic cap from a paint can...anything to block the action of the BOV - yet it cannot be seen from the outside.  :wink:

After that add a manual boost controller to the line from the turbo to the wastegate. This delays the point at which the wastegate opens. Free boost!  

[Maarten]

When you close the wategate and remove the BOV the boost will go up a bit, but serious boost comes with more fuel  

The BOV-hole in the intakemanifold can be sealed off with a plug like this:

http://shop.vwcaddyforum.nl/index.php?cPath=40_106_108

But since you have a 1.6D engine you don't have a BOV hole and I suggest you keep the pressure low.

[carrizog60]

yes i have a 1.6D but it will be builted with 1.6gtd(JR)bolt on pieces.
i think intake manifold wiil be the one of 1.6gtd :?:

[dieselweasel]

Thanks for the heads-up on the crankshaft bolt. I heard of it before and was intending on doing the mod mentioned on vwquebec.ca.
A couple guys there solved that problem.

What was their fix?  I tried finding it on the site but my French leaves a lot to be desired.

[Laurentian]

I'll do the research over the weekend and will give you the link.
As for my 1.9TD I'll be taking it apart and will be doing the machine work myself. Probably get the crankshaft microwelded with 4130 rod and then EDM a keyway / spine, whatever it takes to get 500,000 km's out of it :shock:

I'm slow, I take my time, but I do it right the first time :lol:  :wink:

Later,
Hugh

This may work :
www.vwquebec.ca/forum/viewtopic.php?t=1270&start=0