[TurboKota]

A couple of questions...

Should I consider water meth on this IDI Nissan LD28 diesel? Comp ratio is 22:1 and it will be turbocharged but staying below 15PSI. Thinking of retarding cam timing a couple of degrees to reduce the risk of pre-det and using a 50/50 mix pre-post turbo when 3psi or above. It being a 2.8L will the calculator work for this small of a motor? Bare with me as I'm new to diesels but not to forced induction... Thanks in advance. Frank

[dvldoc]

Originally Posted by TurboKota A couple of questions... Should I consider water meth on this IDI Nissan LD28 diesel? Comp ratio is 22:1 and it will be turbocharged but staying below 15PSI. Thinking of retarding cam timing a couple of degrees to reduce the risk of pre-det and using a 50/50 mix pre-post turbo when 3psi or above. It being a 2.8L will the calculator work for this small of a motor? Bare with me as I'm new to diesels but not to forced induction... Thanks in advance. Frank

You'll probably want to go with more of a water mix, most likely 70/30 to start with. Since its not a turbo charged engine from the factory. You will want more cooling that fueling.

The nozzle size calculator is a bit off on 4cly and 6cly turbo diesels, For that engine. I would start out with a DO3 nozzle with the pump set to it's MAX 250PSI setting. Upping the boost anymore will require the DO4 nozzle.

Good luck on your project.

[TurboKota]

Ok, what about the cam timing? Leave it alone or retard a couple of degrees? Also, just one nozzle post turbo? Thanks Frank

[dvldoc]

You should not need to retard timing because the system will keep your pre-detonation under control. But to be on the safe side in case your system runs out of fluid under high load it will not hurt.

You can go with a Pre-turbo nozzle you will get better gains. A dual nozzle kit will be needed. You can request your nozzle sizes in the comments section of the order. You would need a D03 and D01. I would how ever get a D04 as well.

The D01 will go pre-turbo.

[TurboKota]

Ok, that sounds good. One more question, just noticed the MPI configuration... The LD28 has long intake runners and I think it would benefit with one of your MPI setups. Could I use a 1GPH nozzle per runner or would you recommend something else? That would be 7GPH with the pre-turbo nozzle. Would the one 250 PSI pump be OK to supply 7GPH?

Here is a picture of the LD28 and proposed nozzle location...

[dvldoc]

Yes it has no problem doing that, it can supply a easy up to 60gph + if needed.

[tweak'e]

wouldn't 6 or 7gph be way to much for that motor ?
mayby use the 0.5 nozzles?

[Dust]

Tweak, I may agree with you, unless having that many nozzles does something to flow of the nozzles.

[dvldoc]

No, its a turbo diesel, Even the 1.9TD motors run up to 4gph to 5gph nozzles.

There will be a pressure drop with using 6 nozzles, but 6 to 7gph on that engine will not be to much. Does he need that much probably not. One 5gph nozzle will do the trick.

[Dust]

What kind of pressure drop are we talking about?