[Mike]

Hi, I've been in contact with Bruce the UK supplier, asking about a kit for my Xantia 1.9TD and he's been most helpful but I feel I'll be drowning him in questions so thought I'd offload them here instead.

I initially asked about what I need and the reply has come back a basic kit for about £170 but also recommended a dual injection (another £20) so I can have pre-turbo injector also.

I've read all I can on this site but as usual it's left me with more questions still so here goes...

I'm intially looking for fuel economy, added power when required and the steam clean effect is a welcome bonus especially if it were to clean the inside of my FMIC as 166K miles of EGR (ab)use has really caked up the induction system

Would I still be saving money considering I'll have to pay just under £1 per litre on top of my diesel fuel bill?

My induction system is a torturous route of ups and downs with several sharp turns, including a long drop and 90-degree horizontal turn just before the turbo. What is the risk of water/methanol dropout and how does that affect the performance of the system?

Regards,
Mike

[dvldoc]

There is alot more air flow than you think. There is nothing left in the intake after the system turns off. Think about this, 100's of cubic feet per minute of airflow in a tube that is less than 2 1/2 inches to 3 inches inner diameter.

Many vehicles are like that.

[Mike]

Hi dvldoc, I'm afraid such science is over my head but I was concerned that any "mist" sprayed into my induction will be driven and dragged into and along the interior walls of the hoses. Would this not encourage the water to increase it's droplet size and end up hitting the turbo at the circumference?

[dvldoc]

I think your not considering the airflow and just how fine the atomization of the system is. There is nothing left over in your intake to run back against the turbo. The only way this could happen if you were injecting a amount much higher than your vehicle is rated for.

[Mike]

Hi dvldoc,
Sorry, I'm lost, now you mention run back. Let me re-phrase, I said I was advised to buy a dual injector kit to take advantage of pre-turbo injection but I've read (on here I think) that it should be aimed at the centre nut of the compressor wheel. On the xantia, that may not be possible due to space constraints.

[bruce-m]

Hey Mike

What Dvldoc is trying to explain is that that the spray is so fine there is no real chance of the water sticking to the walls of the pipe and becoming bigger droplets also this wont happen aswell due to the fact that the suck from the turbo is huge, the amount of air a turbo munches is quite mad.

I run the Dual nozzle set up on my skyline and have the jet mounted a good 8-10 inches away from the turbo in my intake pipe which has a fair few bends in it and i don't have any probs due to the suck and the amount of air the turbo is taking in and compressing.

Hope this helps.

[Mike]

So there's no risk to my turbo if I inject pre-turbo into my induction system?

[bruce-m]

Nope.

[Mike]

Although that may be what Dvldoc meant, I would prefer I got the assurance from the manufacturer/supplier themselves for peace of mind.

[dvldoc]

The manufacture of the nozzles made these to our specs, And the micron size we get from them is what we state. Using the D01 or DO2 nozzle is safe for pre-turbo injection. Feel free to ask any customer who has taken there system apart. It's bone dry in there. Try to put the nozzle as close to the turbo as possible if your worried about that.

We wouldn't tell you this our have as many people who run this as we do if it caused damage to your turbo. I know of at least 40 vehicles in the Philippines alone running this set up with no issue and I use this as a example because these vehicles have some of the smallest turbos you have ever seen. Barely a 2" inlet on most.



Now take a guess which i prior to the pre-turbo nozzle and which is not. Or are they both before and you can see normal compressor wear. Remember particles under 20 to 10 microns are blasting the face of your wheel all the time because that's the limit of most filters filtration. And it's worse with K&N style filters since they actually filter less than paper.

A


B



Install location.



This particular vehicles HP/TQ prior to the pre-turbo nozzle, It's now making more power.