Rpm activated switch?

[GTS1998]

I am in the process of putting together a nitrous kit for my 1998 GTS. What kind of RPM activating window switch are you guys using (MSD?) If so, does it have to be modified for the input signal? I would like to be able to limit activation between 3000 rpms and somewhere south of the rev limiter. Thanks

 

[Snakester]

MSD makes the only separate RPM window switch box that I know about (that's not part of some other more complex system). It works great, but you have to send the box to MSD to calibrate it for a 2/10 cyl engine.

It's pretty cheap insurance so that the nitrous only sprays when you want it to. Remember that the Viper's rev limiter just cuts the fuel, which could be a disaster when running N2O.

Most of the N2O RPM Window switch kits come with a couple sets of what they call "pills" which plug into the MSD unit to manually set the particular RPM that triggers the nitrous setup on (and off again automatically).

 

[VIPER D]

I use a vec2 for my srt/brt/propane/n2o




vd..

 

[98MODMTR]

MSD!

 

[GTS1998]

Thanks for the replies!

 

[AlvaSpeed]

I was told that the Viper´s ecu cuts both the fuel and the ignition (spark) so there should be no problem with hitting the limiter on nitrous.........

 

[VIPER D]

check out my post of vids and pics on the gen3 room you might want to check it out.


nos d..

 

[GTS1998]

I don't want to activate the nitrous below 3000 rpms accidentally, and I am concerned about nitrous and fuel pooling in the intake when the limiter comes back on. When the spark comes back there could be a big boom. I have learned that you can not have too many safety features when it comes to nitrous.

 

[AlvaSpeed]

Viper D:
What kind of nitrous set up do you have?

 

[VinR1]

Nitrous Oxide Systems also has a RPM switch. I got mine through Jegs PN# 741-15879 $189. You adjust on/off with supplied rpm chips. It also works great with multi stage systems.

 

[VIPER D]

its a btr system

they us a nx kit as a base.


vd.. look at the pics of the vec2

http://vca2.viperclub.org/forums/showflat.php?Cat=&Board=UBB21&Number=419255&page=0&view=collapsed&sb=5&o=&fpart=1