NOS as Antilag missing Max pressure for nos

[quark2501]

Hi Guys

I was planning to use NOS below 1bar, and have it deactivate above. But I dont see any max pressure settings under nitrous.

Am I missing something, or will it be possible in later versions to have that?

[jsmcortina]

It isn't "missing" as such, nobody has asked for it.

James

[quark2501]

Okay.

They (NOS kit manifactors) charge alot of money for a anti lag nos system, which only comes with a pressure switch as extra.

I my case I´am spooling a gt35 .82 on a 2l engine, the turbo can easily make the horsepower levels I want but doesnt spool before around ~5000rpm.

[papiogxl]

I would like it as well. I mentioned something a little while ago that involved a progressive nitrous vs boost.

[dontz125]

They (NOS kit manifactors) charge alot of money for a anti lag nos system, which only comes with a pressure switch as extra.

A pressure SWITCH is shown as part of the suggested wiring in the manual, but as a "falls open at low pressure" cut-off if there's too little pressure to properly feed the injectors. A 'max' pressure is normally a function of the bottle blow-off valve - guys run heater blankets on their bottles to boost the internal pressure, so I don't see too-high pressure being an issue.

[jsmcortina]

The OP is talking about intake pressure. i.e. using nitrous to aid turbo spool-up, then switching it off once the turbo is on-song.

James

[forcefed86]

Made a thread about this myself, wasn’t aware of this post.

Is there any way we could use the MS3 to shutdown the switched 12v N20 activation input?

Wiring in an adjustable “normally closed” hobbs switch would work, but I was hoping to have MS do the work for me instead of adding a bunch of external garbage/wiring.

[jsmcortina]

I'll consider this for a future code version.

James

[quark2501]

Will cutting the 12v nos input to the ms3, shut down the nitrous solenoid? Thinking about using a output to kill the 12v to the ms3 via a relay.

[forcefed86]

Will cutting the 12v nos input to the ms3, shut down the nitrous solenoid? Thinking about using a output to kill the 12v to the ms3 via a relay.

Yes. A NC relay in line with the 12v input set to trigger at “X “ amount of boost should shut it off. Much cheaper than a $35 hobbs switch and no VAC line required. Good idea!

[Matt Cramer]

I suspect my Dart might benefit from this as the turbo I've picked out may be a little too big...

[forcefed86]

The more I think on it, the boost switch may not be necessary. (at least with my setup) I think the TPS and RPM “window” activation/deactivation on the MS should work just as well as a boost pressure switch. If your not using nitrous to spool between shifts you probably don’t need to wire in a boost switch IMO.

I stall to 3000-3100 on the trans brake/starting line. I’ll have the nitrous trigger set to come on at 3000 rpm/95% TPS and be off by 3600-4000. I shift at 6800 and never fall below 4000 again so the nitrous should stay off for the remainder of the ¼ mile run.

I suspect my Dart might benefit from this as the turbo I've picked out may be a little too big...

Pretty amazing what even a tiny amount of nitrous will do for your spool times. I ran dry nitrous shot with a .022 jet (this is a fuel jet and very tiny approx 30hp) on my 3.8 buick V6. Was running a 72mm turbo with a P trim exh wheel and .68ar exh housing. Without it I was lucky to hit 5lbs after a good 3-4 seconds on a trans brake. With it I could build 10+lbs almost instantly. Bottle lasts a long time as well with such a small nozzle and short activation time.

Running a .035 (maybe 50hp?) dry shot on the 4.8 liter. Waiting on one more fitting and I’ll be able to test it

[filipesbp]

Hi,

This thread is the most suited for my question, first: I have a small engine (2L) with a big turbo (GT28RS AR0,86) and MS3X for drift and i want to use the nitrous so that i dont have to clutch kick the S*** of the car..

I have made this log from last Drift Day:


The arrows is where i clutch kicked, green line is throtle position, white line is RPM and red line is BOOST.

In DRAG the window of RPM is enough to limit the nitrous but in my case it will not work fine since the rev limiter is at 7000rpm and the driving forces to release and press the accelerator as sometime the engine rpm is still near the rev limiter.

I need a max pressure setting.. For now i was thinking on a way to do that with what we have available:

Using the "Programmable On/Off Outputs" and setup one output to go off with the input = map < 200 (turbo pressure = 1bar), then connect that output in line with the button of nitrous, that will make the nitrous go off as i have turbo pressure right?

This makes sense or is a better way?