I am running a msd digital window switch, What would be the idea RPM's to bring the nitrous on and off?....just somewhere to start...peak HP was around 5500rpm's...also were should i set my shift points....

 

I have my timing tuner on at 2750 and off at 5900 (thats as low as I can set it on the upper limit). Someone said I could turn it on earlier, because I have my stock torque converter. BTW do you shift your truck manually, or let the it shift on its own? I would set the upper limit a little above the shift points, and under your stock rev. limit. You can turn it on as early as you want, but be careful not to cause a backfire.

 

I am manually shifting it, on stock converter.

 

I'd set it a few hundred before you shift, say if you shift @ 6100, set the off RPM for 5900~...unless you want to spray thru your shifts. On stick shifts it's a good idea to set it a few hundred after your shift point, so if you miss a gear you don't have an expensive problem. For on RPM, I've always heard 3000 is a good safe RPM to begin, but some spray lower.

 

I have mine set @ 3000 on 6000 off if i go lower on the turn on it will not shut off fast enough and the truck wants to die out on the other end but on my take off i have a button that i push out of the hole and some ET streets im in a 2005 crewwcab and it runs 13.21@103 on a 150 wet shot.

 

what are your mods 05gmc?....so you are spraying with the button outta the hole untill the window switch takes over?

 

go to drag race and look under my truckand a friends lighting