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nitrous interrupt between shifts

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Old Jul 7, 2015 | 11:42 AM
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Default nitrous interrupt between shifts

Is the LPE lnc-003 and NOS mini progressive capable of interrupting nitrous between shifting gears? How are you guys doing this?

I would think clutch engagement is how nitrous would be deactivated but not sure exactly what modules I need.
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Old Jul 7, 2015 | 09:02 PM
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Default Disable nitrous on the shift

The LNC-003 can't be used to disable the nitrous on a shift. The LNC doesn't have outputs to control anything. For nitrous you probably want the LNC-2000 for timing retard (still won't control nitrous activation though)

Not real familiar with the NOS mini progressive controller but it appears to have an RPM window switch function so that can be used to disable the nitrous above a certain rpm but unless it had a time delay it would re-enable as you were making the shift (as soon as rpm dropped below the high rpm setting).

If you aren't doing WOT shifts the NOS mini also appears to have a WOT switch function so you could disable nitrous based on throttle (lift on the shift and nitrous is disabled).

You could connect a switch on the clutch pedal (separate microswitch) in combination with the TPS signal so that you had to be at WOT AND have the clutch released to enable nitrous.


Originally Posted by slowlsx
Is the LPE lnc-003 and NOS mini progressive capable of interrupting nitrous between shifting gears? How are you guys doing this?

I would think clutch engagement is how nitrous would be deactivated but not sure exactly what modules I need.
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Old Jul 8, 2015 | 05:41 AM
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The progressive Does have a window switch. I have my window switch set at 3800 and 6800, I shift around 7K. Therefor the nitrous is off at the shift point
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Old Jul 8, 2015 | 09:03 PM
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Default Window switch nitrous disable

Has anyone data logged what the nitrous (and other engine related variables) is doing when you use a window switch to disable the nitrous?

Depending on the RPM hysteresis and response time of the window switch (and the nitrous settings and nitrous system response time) I would think the nitrous would turn back on fairly early in the shift process when using a window switch to control it?

In your example, you shift at 7000 RPM, engine speed starts to drop when you lift off the gas. Assuming no hysteresis in the switch, when the RPM drops to 6800, the nitrous turns back on. Even if you have a couple hundred RPM hysteresis on the window switch, then it turns back on at 6600 or 6500 rpm while the engine speed is still dropping and the throttle is still closed. Depending on the difference in gear ratios, engine speed probably needs to drop to 5500 to 6000 before you apply the gas again.

Just wondering.


Originally Posted by waltsfastz
The progressive Does have a window switch. I have my window switch set at 3800 and 6800, I shift around 7K. Therefor the nitrous is off at the shift point
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Old Jul 8, 2015 | 09:40 PM
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I'm wondering the same thing, I am running a nitrous outlet plate setup, LNC2000, NOS Mini in a 1999 Camaro LS1 M6.

I want to be able to 2 step the launch, no lift shift and cut the NOS during shifts and not spray during the 2 step.

2 step set at 6600, Limiter set at 6700. Usually shift around 6500-6600.
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Old Jul 8, 2015 | 10:45 PM
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Yeah, I started a different thread about this, specifically related to no-lift shifting. What I came away with is a switch on the clutch pedal to shut off the nitrous when the clutch is depressed, combined with a progressive controller to bring the nitrous back in a controlled way.
With any other options that I know of, the shift happens so fast that the RPMs don't drop out of the window and if you're not lifting, you stay at WOT, so the nitrous keeps spraying. That's not a good idea.

Anyone else know more about the progressive controllers capabilities that might be useful to this application and the OP?
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Old Jul 9, 2015 | 12:22 AM
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Default nitrous controller for shift cut

The Lingenfelter NCC-002 two stage progressive controller has a clutch input and also has TPS and RPM input (window switch capability).

It can also ramp in the nitrous when it is re-enabled after a shift so you could fine tune the amount of time it takes to ramp back in depending on your shift times/vehicle configuration.

It also has built in data logging so you could confirm it is doing what you want and use that data to help make adjustments as needed.

Originally Posted by 99FRC
Yeah, I started a different thread about this, specifically related to no-lift shifting. What I came away with is a switch on the clutch pedal to shut off the nitrous when the clutch is depressed, combined with a progressive controller to bring the nitrous back in a controlled way.
With any other options that I know of, the shift happens so fast that the RPMs don't drop out of the window and if you're not lifting, you stay at WOT, so the nitrous keeps spraying. That's not a good idea.

Anyone else know more about the progressive controllers capabilities that might be useful to this application and the OP?
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Old Jul 9, 2015 | 10:04 PM
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Great, thanks!
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Old Jul 16, 2015 | 01:58 PM
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FWIW - I spray thru the shifts. Window 5500-6950 - redline @ 7100 - shift @ 6800.

I've done this with a syncro'd t56 and a faceplated t56 without issues.

At the line the 2step varies on how the car is working but 5500-6500 is where it normally is. I bring it up on the 2step but not enough pedal to active the TPS switch.

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Old Jul 17, 2015 | 08:24 PM
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My LNC 2000 wired into my leash nitrous board allows me to no lift shift on the bottle.
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Old Jul 18, 2015 | 09:01 AM
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I do the same as several others on here and use my nitrous controller with window switch ... works good because you can fine tune it for track conditions... spraying through the gears would be fine until you miss a shift
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Old Jul 18, 2015 | 12:56 PM
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Hp I k
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