Spraying thru the shifts...
Spraying thru the shifts... I installed my Stage V FLT trans a month or so ago and I am finally going to the track.. Right now the WS is set to cut off the spray at 6400 (shift at 6600) and to turn back on at 3700 (4000 stall so would assume 4000rpm)..
Will I loose much ET having not sprayed thru the shifts? I know its not the best thing for the trans but just wondering... Thanks
Will I loose much ET having not sprayed thru the shifts? I know its not the best thing for the trans but just wondering... Thanks
i have always kept the spray on while making the shift in an automatic vehicle, never had a problem, with the spray i always shift eariler rpm than n/a, no need to run the spray that high, your making so much more power down low anyways when the spray is on
I have a theory on spraying through shifts
f/i guys cant "turn off" 150 or so Hp to shift, why should we need to while spraying??? I feel like it causes a lot of un needed loading, unloading, loading etc etc... in the trans, and drivetrain itself. I run the same trans in a 4500# truck with a Yank SS3600 converter, and have been spraying through shifts on the track. with absolutely no problems. I dont think you will either, especially given the much lighter weight of the car... Just my $.02
f/i guys cant "turn off" 150 or so Hp to shift, why should we need to while spraying??? I feel like it causes a lot of un needed loading, unloading, loading etc etc... in the trans, and drivetrain itself. I run the same trans in a 4500# truck with a Yank SS3600 converter, and have been spraying through shifts on the track. with absolutely no problems. I dont think you will either, especially given the much lighter weight of the car... Just my $.02
Maybe I will just spray thru the shifts for a couple of runs and see how it goes... I know I will get kicked off the track when I turn on the N20 anyhow, so might as well make it count.
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Joined: May 2006
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There is no loading & unloading, it is more load & less load. Anytime you can eliminate the spray through the shift, the better it is for the transmission, and everything thing else in the drivetrain in terms of longevity. In terms of a performance difference, from past experience very little. In fact if you break away the tires on the shift, you should see a slight improvement by not spraying through the shifts.
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So, if my shift is set at 6600, is it ok to set the WS at 6400 to deactivate the N20?
I have it set at 3700 (with a 4K stall) so it SHOULD come back on as soon as its done shifting.
I have it set at 3700 (with a 4K stall) so it SHOULD come back on as soon as its done shifting.
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Verdad Gallardo hmm.i would try 6500. odds are the WS would still cut off sooner than the shift would happen. if you're setting your shift at 6600 there's still the chance it may shift a little higher than 6600. you'd be sure the spray was off by the time the car shifted and youd be right back into spray.
edit:still, with that cam I would think that you would want to shift a little higher. why not 6700 shift?
edit:still, with that cam I would think that you would want to shift a little higher. why not 6700 shift?
Originally Posted by GregWS6&z28
hmm.i would try 6500. odds are the WS would still cut off sooner than the shift would happen. if you're setting your shift at 6600 there's still the chance it may shift a little higher than 6600. you'd be sure the spray was off by the time the car shifted and youd be right back into spray.
edit:still, with that cam I would think that you would want to shift a little higher. why not 6700 shift?
edit:still, with that cam I would think that you would want to shift a little higher. why not 6700 shift?
the motor has 100,000 miles on it, so I am just wanting it to get thru this summer at least..
Most window switches will activate as soon as you get back into the allowed rpm range. The only device I've seen with a lockout is the NX Maximizer II.
You could do a window switch with an MSD programmable delay, and put like 1/8th second for the shift to complete... I'm deciding what to do about the same problem. I just think it's dumb to load the tranny extra during the shift. Since I'm already FI as well, nothing I can do about that part
Jim
You could do a window switch with an MSD programmable delay, and put like 1/8th second for the shift to complete... I'm deciding what to do about the same problem. I just think it's dumb to load the tranny extra during the shift. Since I'm already FI as well, nothing I can do about that part
Jim
i always prefer to shift way sooner with nitrous, it makes so much more power down low anyways,,
one more thing to remember if you are spraying and you hit the rev limiter,, say goodby to your engine, because the computer will shut off the injectors and your engine will keep reving due to the nitrous and gas being sprayed into the engine,,, but it will be very lean and probly blow the engine right away(burn up a piston)
you may not even know you hit the rev limiter because the engine will keep running/reving with the nitrous on
one more thing to remember if you are spraying and you hit the rev limiter,, say goodby to your engine, because the computer will shut off the injectors and your engine will keep reving due to the nitrous and gas being sprayed into the engine,,, but it will be very lean and probly blow the engine right away(burn up a piston)
you may not even know you hit the rev limiter because the engine will keep running/reving with the nitrous on
So, if the car is shifting at 6600, what is a safe RPM to set the WS at then?
I am doing a couple of runs NA to make sure that I am not boucing off the rev limiter... If I am still bouncing off the rev limiter, then I am not going to spray. but, I think we tuned that out since then.
I am doing a couple of runs NA to make sure that I am not boucing off the rev limiter... If I am still bouncing off the rev limiter, then I am not going to spray. but, I think we tuned that out since then.
Originally Posted by waterbug1999
So, if my shift is set at 6600, is it ok to set the WS at 6400 to deactivate the N20?
I have it set at 3700 (with a 4K stall) so it SHOULD come back on as soon as its done shifting.
I have it set at 3700 (with a 4K stall) so it SHOULD come back on as soon as its done shifting.
Originally Posted by silver-mod-o
I have a theory on spraying through shifts
f/i guys cant "turn off" 150 or so Hp to shift, why should we need to while spraying??? I feel like it causes a lot of un needed loading, unloading, loading etc etc... in the trans, and drivetrain itself. I run the same trans in a 4500# truck with a Yank SS3600 converter, and have been spraying through shifts on the track. with absolutely no problems. I dont think you will either, especially given the much lighter weight of the car... Just my $.02
f/i guys cant "turn off" 150 or so Hp to shift, why should we need to while spraying??? I feel like it causes a lot of un needed loading, unloading, loading etc etc... in the trans, and drivetrain itself. I run the same trans in a 4500# truck with a Yank SS3600 converter, and have been spraying through shifts on the track. with absolutely no problems. I dont think you will either, especially given the much lighter weight of the car... Just my $.02
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exactly... especially if he's going to be running a lelvel 5 FLT... its a super stout trans... even in a "heavy" Fbody, I'm putting more abuse on it in the truck with no issues.
especially if he's going to be running a lelvel 5 FLT... its a super stout trans... even in a "heavy" Fbody, I'm putting more abuse on it in the truck with no issues. 
