NITROUS OXIDE ( nos / n2o ) advice forum

Seems like WON controllers don't have boost based control option or am I missing something ?

In the future I might need a controller that limits nitrous flow until boost is high enough. Do WON solenoids work with Nitrous Express controller ?

There's a number of ways you can link nitrous to boost using the Max;

1) Simply by determining 'how long' it takes boost to reach the desired level and using the 'time' based delivery feature

2) Add a simple boost pressure switch to either activate or de-activate the Max and then rely on the 'time' based delivery feature

3) Add a boost pressure transducer (or link to your existing MAP or MAF sensor) and link that to the Max terminal 13;
http://www.noswizard.com/pdf/max_v2_wiring.pdf
This will give you 'actual' boost pressure linked nitrous delivery.

Number 2 is generally the best option as it gives you a higher level of adjustability and access to more features but option 3 is the only way to have 'actual' boost linked nitrous delivery.

My plan was to make very big hp numbers from diesel engine with nitrous. Boost referenced nitrous flow to prevent flame out from too cold intake air, more boost, more nitrous. Maybe also run without intercooler to keep charge warmer. Can nitrous be sprayed before turbo to prevent compressor wheel overheating from very high bost pressures ?

This is what I don't want to happen, it usually kills the turbocharger. http://www.youtube.com/watch?v=aLh0ufSLKxs

I believe it's because of too cold air in the cylinder. Diesels ignite from cylinder heat, lots of fuel also cools diesel combustion process, you can get flame out from excess diesel only but the explosion in the exhaust is usually softer than with heavy doses of fuel, maybe because theres mory oxygen with nitrous. So, you need enough boost before spraying that heavy dose of nitrous.

Diesel is vaporized inside the cylinder but there's not enough heat to ignite it, vaporised fuel goes to exhaust manifold and ignites there from the heat of other cylinder exhaust gases and hot turbine wheel.

Here's without nitrous, just too big (250% oversize) injectors that don't atomize well.. http://www.youtube.com/watch?v=_7fECIdRNPw

Same happens here when the engine is still cold. http://www.youtube.com/watch?v=WtlMd_2RaVI

Who are those diesel racers using your products and how much they spray ?

it's happening in the exhaust and breaking turbine blades or axle. Those other videos didn't have much fuel or were idling and no nitrous so the explosion is softer. Youtube is full of diesel nitrous "backfires", mostly in the exhaust, some in intake. You can see that the flame is quenching when the smoke gets white.

I doubt the cause for the inlet backfires is the same as those in the exhaust and I was targeting my replies at those in the intake, as that was the concern you first mentioned.

Whatever the case, IF 'ANY' problem is caused by excessive nitrous at low rpm, feeding the nitrous to the engine progressively will CWERTAINLY solve/prevent that.

Getting back to your first request about the Max and boost, it looks to me like all you really need is the Max to either;

1) Deliver the nitrous progressively from a low level at the launch

or

2 Delay the initial activation by a fraction of a second AND deliver the nitrous progressively

Both of which the Max can do in a number of ways.