Mk2 Vr6 - Wizards of Nos - Nitrous

[DOA]

DOA - The fuel pressure sensor can be wired up to shut off the Nitrous as soon as there is a drop in fuel pressure which would cause a lean mixture before it occurs.

A lambda sensor can be used to give you air/fuel info and could shut off the Nitrous if the mixture leans out. There are loads of ways to prevent the mixture leaning out which all costs but is money well spent and is still far cheaper than turbo or SC.

As DH picked up, lambda (wide or narrowband) is definately not fast enough to stop a grenaded engine and I doubt a fuel pressure sender would give a consistent enough signal to use as a guide to leaning either but could well be wrong on the last one. I would certainly want a pretty fast sampling rate if I was relying on a fuel pressure sender to make my engine completely safe. Not that Im saying dont do it (I probably wouldnt do either lol, but then, I wouldnt be arsed with the hassle of running nitrous anyway). As for running the timing permanently retarded and running an oil cooler, both of these have bad effects in themselves. Either way, its all compromise and as long as your sensible and the engine is healthy, your unlikely to hit any major problems with nitrous, I was just pointing out the flaws in the plans  .

[JamesS]

So, it seems it is a bit of a minefield! lol I think it would be fun and COULD be a good option if it's done sensibly but as with other FI there will be plenty of setup time & some replaced parts to get it working reliably. It doesn't appear to be as forgiving as other FI either because it can go so wrong so quickly. The sensors etc I have mentioned have been used by other people, I have no experience with nitrous and have just read about this so don't know response times and their effectiveness at preventing lean mix but if they are not fast enough then it does seem a bit pointless.

Don't like the sound of the insurance premiums you got either danny_p! I would prefer the 450 garret donkeys over 325 Nitrous donkeys any time though!

One good thing about a wet system is that the fuel/Nitrous mix is pre-set and separate from ECU/injectors so if it's turned off then you will have normal vr6 consumption, which is one of the benefits over other FI. During Nitrous it's probably wise to have it on the rich side and you will probably get 5mpg, haha.

Hmmm, decisions decisions........