14.018 @ 99.08
- Thread starter Vex5.0
- Start date
-
Sponsors (?)
You did gain over half a second with the 75 shot. Looks like the nitrous is working. Not bad at all. Do you have a bottle warmer? What was the pressure of the bottle? Bottle pressure is absolutely essential. If you are not spraying at at least 900psi, you are not making the full 75 shot.
Also watch your timing with nitrous - Nitrous increases cylinder pressure, if you detonate on nitrous, it could hurt pretty bad. Generally, you want to run stock timing on a 75 dry shot and retard timing by -2 with a 100 shot and then -4 with a 150 shot. I couldn't advanced my timing on a 75 shot and I have 24lb injectors. With the 100 shot I have to run 8* timing or it will ping.
According to all the manufacturers, you don't need to upgrade injectors for a 75 shot. I don't think that there is more to be gained from N2O with a bigger combo - 75 shot on one motor is the same 75 shot on another motor. Nitrous is not like a supercharger which adds oxygen by forcing more atmospheric air into the motor, thus benefiting from air flow. Nitrous adds the oxygen chemically. The only difference with a bigger combo is that you have more HP to begin with. A 100 shot will not add any more HP to a highly modified motor than it will to a stock motor.
I hope this helps and I also hope I'm not giving incorrect info.
Also watch your timing with nitrous - Nitrous increases cylinder pressure, if you detonate on nitrous, it could hurt pretty bad. Generally, you want to run stock timing on a 75 dry shot and retard timing by -2 with a 100 shot and then -4 with a 150 shot. I couldn't advanced my timing on a 75 shot and I have 24lb injectors. With the 100 shot I have to run 8* timing or it will ping.
According to all the manufacturers, you don't need to upgrade injectors for a 75 shot. I don't think that there is more to be gained from N2O with a bigger combo - 75 shot on one motor is the same 75 shot on another motor. Nitrous is not like a supercharger which adds oxygen by forcing more atmospheric air into the motor, thus benefiting from air flow. Nitrous adds the oxygen chemically. The only difference with a bigger combo is that you have more HP to begin with. A 100 shot will not add any more HP to a highly modified motor than it will to a stock motor.
I hope this helps and I also hope I'm not giving incorrect info.
Thats what my friend said. Hes sponsored by edelbrock nitrous systems and he said a 75 shot was rated on a stock motor so it wont gain anymore on a highly modified motor. I didnt have a bottle warmer when I ran today. I didnt start running a lot lower until the afternoon untill it was almost 80. The nest thing i am buying is an NOS bottle warmer and my system is on a WOT switch which i would think would better benifit from a regular switch on my shifter but I want to make what I have work for now. If I do go to a 100 shot I will deffinatly retard the timing before I run it.
thanks
vex
thanks
vex
I would go 125 but i would have to uprgrade fuel then. I want to see how far I can go on a 100 shot and suspension work.
94gts
Member
i ran a wet 150 shot with stock motor.
now i have a 155 fuel pump gt 40 heads, explorer upper, and stock everything else, even injectors
now i have a 155 fuel pump gt 40 heads, explorer upper, and stock everything else, even injectors
those times are off par does sound like nitrous isnt activating .
i think the mph should be higher .
auto or 5 speed if its an auto i can see why.
and u wont nneed to upgrade your injectors and stuff for a while
i run a 150 dry shot with a fuel pressure regulator and 255 pump.
Brian
i think the mph should be higher .
auto or 5 speed if its an auto i can see why.
and u wont nneed to upgrade your injectors and stuff for a while
i run a 150 dry shot with a fuel pressure regulator and 255 pump.
Brian
