Finally ran the nitrous
05-20-2011, 01:16 PM
#12
4th Gear Member
Join Date: Sep 2009
Location: NC
Posts: 1,481
WOW!!!
My first thought is where is your rev limit set to activate? Do you have the nitrous connected to a window switch? If not, be aware that hitting the rev limiter on the nitrous is VERY LIKELY to result in catastrophy!!!
The stock valvetrain will be highly stressed at 7000rpms. Without aftermarket cams, the motor will be WAY past its power band at 7000rpms. As mentioned above, shift points around 6000rpm are probably as high as you want/need right now.
Don't sweat the times right now, just focus on improving the launches and your consistency. Better times will come with practice!
Enjoy the new found power
My first thought is where is your rev limit set to activate? Do you have the nitrous connected to a window switch? If not, be aware that hitting the rev limiter on the nitrous is VERY LIKELY to result in catastrophy!!!
The stock valvetrain will be highly stressed at 7000rpms. Without aftermarket cams, the motor will be WAY past its power band at 7000rpms. As mentioned above, shift points around 6000rpm are probably as high as you want/need right now.
Don't sweat the times right now, just focus on improving the launches and your consistency. Better times will come with practice!
Enjoy the new found power
05-20-2011, 01:58 PM
#13
05-20-2011, 06:30 PM
#14
I figured out how to change my shift points with my handheld and set the WOT shifts at 6000RPMs. I just got back from testing it out and it worked perfectly. So, with it working now, what do you guys recommend I set my shifts at when I use the nitrous? 5500RPMs or 6000RPMs?? I know I start getting out of my powerband at higher RPMs so I don't want to go to high.
Last edited by huey_33; 05-20-2011 at 06:33 PM.
05-20-2011, 08:47 PM
#16
3rd Gear Member
Join Date: Aug 2007
Location: Tulsa, OK
Posts: 670
I think you will be quicker/faster shifting at 5500. If you had PI heads/cams, it might be better to go a little higher. You can always play around with it a bit at the track next time and see what works best.
05-20-2011, 09:00 PM
#17
4th Gear Member
Join Date: Jul 2008
Location: NC
Posts: 1,956
Id set it around 5800. With the stock valve body in the 4R70W its shifts are elephant slow so it wont actually get around to physically changing gears until 6100ish RPMS even with the limit set at 5800. You're very well likely past your prime powerband even with nitrous at that point. At stock your TQ peaks at 4k and HP at around 5K.
I find it cute when I see stock top end 2V 4.6L guys revving their **** up to the space station.
I find it cute when I see stock top end 2V 4.6L guys revving their **** up to the space station.
05-20-2011, 09:44 PM
#18
Join Date: May 2011
Location: north kackilacki
Posts: 31
i have a pi swapped 98 gt do you all thinK its safe to spray mine with 100 shot also my redline moved from 5000 to 6200 is that normal?? sorry to highjacK this thread im just curious!! im also running stock bottom end.. p&p pi heads and cams and all the other mods in my sig
05-21-2011, 05:24 AM
#19
It's not like I set it to shift that high on purpose. I know high RPMs are an accident waiting to happen. Before the tuner it was shifting in the 5000's. Once I uploaded a tune to my car, thats when the high shifting started and I knew something felt weird. Now that I know how to adjust my shift points I will keep it at 5500 or 6000. You can only adjust the shift points in increments of 500RPMs with the tuner I have.
Last edited by huey_33; 05-21-2011 at 05:31 AM.
05-21-2011, 05:29 AM
#20
My engine is basically a stock NPI engine and I am spraying a 100 shot. From what I gathered from everybody on here, it is pretty safe to spray up to a 100 shot on a stock engine, anything over a 100 shot you have to get it tuned. So you are probably good to go with a 100 shot.