Nads

[Stavros]

Sorry guys bit of a dumb question what is Nads? is there any info and something i should know about, Thanks

[the evil twin]

http://www.nissanpatrol.com.au/forums/showthread.php?31475-Excuse-my-ignorance-NADS&highlight=nissan+anti+detonation

[Stavros]

Thanks evil twin, kinda got the gist, from what I understand it's the earlier 3 ltr, not so much the Common rail with modifications

[the evil twin]

Thanks evil twin, kinda got the gist, from what I understand it's the earlier 3 ltr, not so much the Common rail with modifications

Yes, pretty much, however it is a rather broad application these days.
There is no hard evidence that NADS does anything to prevent a blown engine but if it doesn't help and it doesn't hurt than pffft who cares as it isn't expensive even if it is only a placebo.

Catch can - good idea on any diesel
I didn't fit one as my CRD did not have much blow by anyway but I did keep an eye on the intercooler build up and rinsed it twice in 100,000 K's

EGR block - totally illegal but has a lot of upsides if you are happy to poison the planet.
One thing tho is that apart from boost control there is no other compensation or changes to ECU maps after a block so maybe there is hidden issues with that in the fuel maps, maybe not.

Dawes and Needle - each to their own on the use of manual boost control.
I stuck with ECU control on my CRD (chipped etc etc).
The ECU is looking at a whole lot of sensors and parameters, much more so than a Dawes and Needle so I was happy to adjust the VNT and leave it.
I totally understand why manual control has its proponents and thats cool too.

[mudski]

Thanks evil twin, kinda got the gist, from what I understand it's the earlier 3 ltr, not so much the Common rail with modifications

Pretty much as what ET has explained. The NADs was originally designed for the Earlier direct injection motors. but not only were these valves introduced to take away control over the ECU, to increase performance which is does exceptionally well. But now, well in the last couple of years, the Common Fail owners have caught onto the idea of these mods and are seeing the performance benefits of fitting these to their motors.
Aannnd! Now the Dawes valves are being fitted to Tritons, Navara's, VW's etc etc.

[Stavros]

Thanks guys, appreciate the advice, makes it more understanding, I'm thinking of chipping and a 3 inch thru, love reading everyone's input 👍

[mudski]

Do the pipe before the chip IMO. And when you get the pipe, make sure it has a threaded bung in the dump pipe so you can fit an exhaust temp gauge in later on if you wish. Well you should but its not a necessity. A EGT gauge is like a thermometer in your mouth. It tells you a lot about how your engine is coping with the given environment.
Plus I would highly advise on getting a pipe with a cat. Big fines if you get busted without one. If you do, make sure its metallic filled and high flow. Many of the cheaper pipes around will be the standard ceramic filled cats. Whilst they are still good they just tend to run hotter than metallic cats and the flow is not quite as good as metallic. Its not a necessity this also, but if your gonna do it. Do it right I think.

[Cuppa]

so I was happy to adjust the VNT and leave it.


What does VNT stand for?

[the evil twin]

What does VNT stand for?

Variable Nozzle Turbocharger

See how polite I am to you 4.2 Dinosaur owners

[Stavros]

Big thanks mudski will def take this onboard, any info is appreciated

[threedogs]

Before you go down the NADS track, most have fitted a EGT and a boost gauge. easier to drive by your gauges.
At least you can see whats happening under the hood.
If you own a Di and ECU-Talk is highly recommened.
If you drive a CR then the Scan Gauge is the go.