Using a window switch with nitrous on an automatic......
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Instructor
Joined: May 1999
Posts: 137
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From: orlando fl us
Using a window switch with nitrous on an automatic......
I posted this on the C4 nitrous area, but would like the C5 perspective as well.
Okay, here is a question for any engineering types out there. Kind of like the chicken and the egg thing. On camaroz28.com I have seen several posts regarding using a window switch on an automatic to turn off the nitrous right before the shift point to help save the tranny. Now using it to shut off the N20 so you don't hit the rev limiter is great and I see it's benefit there 100%, but the tranny thing I just don't see it. Maybe I am analyzing it too much. As we are accelerating let's say in 2nd gear and we are coming up on 5800rpm's and we have the switch set for 5600. The nitrous turns off at 5600 we go the next 200rpm's naturally aspirated then the car shifts at 5800. As soon as the car shifts the rpm's are going to start their swing downwards. By my thinking, in the very short time that it takes the rpm's to drop down to the bottom of the curve where the tranny has fully engaged itself into the next gear and begins it's swing upwards again is where the slippage occurs. With the window switch as soon as the rpm's drop to 5600 or below, the nitrous is going to engage again and put the additional torque strain against the tranny as it is in the process of shifting during this transition or slippage window.
So my question is are the Z28 drivers right about this concept of using a window switch to save the tranny or does it not make a difference :confused:
Okay, here is a question for any engineering types out there. Kind of like the chicken and the egg thing. On camaroz28.com I have seen several posts regarding using a window switch on an automatic to turn off the nitrous right before the shift point to help save the tranny. Now using it to shut off the N20 so you don't hit the rev limiter is great and I see it's benefit there 100%, but the tranny thing I just don't see it. Maybe I am analyzing it too much. As we are accelerating let's say in 2nd gear and we are coming up on 5800rpm's and we have the switch set for 5600. The nitrous turns off at 5600 we go the next 200rpm's naturally aspirated then the car shifts at 5800. As soon as the car shifts the rpm's are going to start their swing downwards. By my thinking, in the very short time that it takes the rpm's to drop down to the bottom of the curve where the tranny has fully engaged itself into the next gear and begins it's swing upwards again is where the slippage occurs. With the window switch as soon as the rpm's drop to 5600 or below, the nitrous is going to engage again and put the additional torque strain against the tranny as it is in the process of shifting during this transition or slippage window.
So my question is are the Z28 drivers right about this concept of using a window switch to save the tranny or does it not make a difference :confused:
Safety Car
Joined: Feb 2000
Posts: 3,683
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From: Austria
Re: Using a window switch with nitrous on an automatic...... (1QWIKLT1)
I DO want to spray through the shifts.
So it doesn´t matter for me :D
But yes, I do see your point.
You´r e right, if you wanna have the spray off during the shifts, you would need to set the window switch quite a bit earlier.
6600 off and 6800 shiftpoint is not enough for a 150 hp shot (for example).
The NOS will come on again right during the shift (stock tranny).
But still less stress than spraying through the shifts.
But who sprays a big shot NOS (to gain ET) and then shuts off NOS through the shifts (lose ET)???
Better get a good tranny and beat the hell out of the tranny. :D
Michael
[Modified by Austrian Vette, 7:24 PM 4/16/2002]
So it doesn´t matter for me :D
But yes, I do see your point.
You´r e right, if you wanna have the spray off during the shifts, you would need to set the window switch quite a bit earlier.
6600 off and 6800 shiftpoint is not enough for a 150 hp shot (for example).
The NOS will come on again right during the shift (stock tranny).
But still less stress than spraying through the shifts.
But who sprays a big shot NOS (to gain ET) and then shuts off NOS through the shifts (lose ET)???
Better get a good tranny and beat the hell out of the tranny. :D
Michael
[Modified by Austrian Vette, 7:24 PM 4/16/2002]
