[Darbym]

I have jus received my kit in the mail today and I have decided to give it a try on my Isuzu Bighorn first with a DO1 nozzle pre turbo. How close to turbo should the nozzle be placed, or does it not really matter. I know your options are open going post turbo, but I can't find any specific info. on pre turbo nozzle placement.

Thanks

Please ignore or erase the 2 prior messages, kept saying there was an error.

[dvldoc]

First of all sorry for the forum, Since we did the update last week, It is giving us hell. Chance still has to fix the rest of the code.

With the DO1-DO2-DO3 nozzle it really does not matter, They all spray at above or just at 200psi the droplet size is around 18 microns so it atomized perfectly to not harm anything. We cannot say the same for other vendors nozzles because ours are custom made. But the droplet size is key to safe pre-turbo injection. I would slap in the DO2 and take here for a spin. You will not be disappointed in the power increase even with strait water.

Which country are you located in?

Here's a troopers install to give you a go by. Set it to come on around 6 to 7 psi if you want to see what it does with max power use a 50/50 mix.

[Darbym]

I am located in Edmonton, Alberta, Canada. I guess I will still try and get it as close to the turbo as possible, sinced you probably already know the air intake on the Bighorn crosses over the entire front of the motor through some pretty inaficient looking plastic. I totally understand how fine the mist is comming out of the nozzle, but was just wondering if a shorter journey to the turbo would be benificial.

Where is the nozzle located on the above Bighorn? Is it Pre or pos turbo?

Thanks

[dvldoc]

His is post turbo in the coupler by the intercooler.

On the 2.5L TDI Starex we dynoed i mounted the nozzle about a inch from the turbo. It's all about ease of install, I think the closer is better. And can pretty much hide the system this way as well.

[Terry Syd]

Dvldoc, I read your suggestion of using a M2 for a pre-turbo installation. I would love to see some dyno results of the difference between a M1 and a M2 pre-turbo.

Presently I have a M1/M2 combination, but I'm wondering if a M2/M1 combination might be better.

[dvldoc]

I don't have any with the difference between the two, You could go either way, Use the M1 post intercooler to make up for the lost cooling of the air due to the heat it picks up in the intercooler.

Its hard to get dynos from customers for the most part unless I do them myself.

[Terry Syd]

Yeah, I was wondering if during the next dyno event in the Phillipines that someone might try it.

I might give it a go myself, it just means I have to disable my system and swap over the nozzles. It does seem like it could have some benefits, especially over here in Oz on a hot dry day. The efficiency of the compressor section of the turbo might be increased over the use of the M1 in the pre-turbo position.

[dvldoc]

I'll make that happen on the 31st when I go back there for a dyno day.

[Terry Syd]

Dvldoc, I've had a further think about the pre and post nozzle injection issues. If someone in the Phillipines was going to run both a pre and post-nozzle injection, I'd really appreciate the dyno charts on swapping the nozzles around - ie: DO1/DO2 to DO2/DO1 using both straight water and alcohol blends.

As I understand it, the cooling in the compressor section performs one function and the water dropplets into the engine cylinder perform another function. Thus, the swapping around of the nozzles might allow us to see the relative merits of both functions.

Also, the use of straight water may see a different response through the turbo. Perhaps the alcohol blend through the turbo may decrease the evaporation rate of the water through the turbo as the alcohol will boil off much more rapidly. What result this has on the power curve would also be of interest and might suggest an even larger nozzle in one of the locations.

I'm looking forward to your tests.

[dvldoc]

The MPV we dynod there is switching to two DO1's in a pre-turbo install. so I will see.

We just had a VW 1.9TDI customer install his like that as well. DO1 pre DO2 post. Says it works much better than the DO4 post turbo he had and his mpg have gone way up. He uses -20 washer fluid.