Whats Safer: Smaller shot or shorter duration shot?
Thread Starter
TECH Apprentice
Joined: Nov 2001
Posts: 325
Likes: 0
From: San Luis Obispo, Ca
Whats Safer: Smaller shot or shorter duration shot? Im going to be getting a 224/224 cam and stage 2 heads pretty soon and was wondering what would be the safer nitrous setup with a rev limiter of 6700 and shift points of 6500. I would be going with a TNT dry kit, window switch, wot switch and FPSS switch. The shot would be a 75 or 100, would it be safer to run a 75 from say 3200 rpm to 6400, or run a 100-125 shot from 3500 rpm to 5800 rpm. Any guesses on which would provide better ET also? Im just trying to keep the bottom end around for a while and dont plan on spraying more than once or twice every couple months - if that. But from what I hear the spray is addicting...
Thanks for the help <img border="0" alt="[hail]" title="" src="graemlins/gr_hail.gif" />
-dan
Thanks for the help <img border="0" alt="[hail]" title="" src="graemlins/gr_hail.gif" />
-dan
Re: Whats Safer: Smaller shot or shorter duration shot? Hmmm...good question. I dont really know the answer but on first guess I would say run the most shot your comfortable with through the full rpm range (75 shot to 6400). If your getting heads and cam Im sure the power band NA will be up there in RPM range so I would use the Nitrous to complement that RPM range. If it was a bone stock motor I would probably say the bigger shot at lower rpm.
Re: Whats Safer: Smaller shot or shorter duration shot? The lower the rpm the nitrous is engauged the greater the benefit in ET. Nitrous builds cylinder pressure very quickly at low rpms...this is why their is such a large spike of torque at low rpms.
In effect if you could activate nitous (of a set HP) and could activate it only from the 0-1/8 or 1/8 mile to 1/4 you would definately benefit most while acceleration demands are highest...when you are at the lowest speeds. This basic priciple is true to fact when comparing it to rpm as well as speed.
Just remeber more cylinder pressure = HP but low rpm activation will tax you components much harder.
Richard
In effect if you could activate nitous (of a set HP) and could activate it only from the 0-1/8 or 1/8 mile to 1/4 you would definately benefit most while acceleration demands are highest...when you are at the lowest speeds. This basic priciple is true to fact when comparing it to rpm as well as speed.
Just remeber more cylinder pressure = HP but low rpm activation will tax you components much harder.
Richard
Staging Lane
Joined: Apr 2002
Posts: 51
Likes: 0
From: ST. Louis MO.
Re: Whats Safer: Smaller shot or shorter duration shot? I agree with 383LQ4SS you need to run the nitrous in the same range that you would running N/A to get the most HP.
If you look at how nitrous works, it gives you a certin HP increase across the RPM range, at lower RPM's you see lots of torque, at the high end the torque drops off, but the HP increase from nitrous stays about the same across the RPM range provided you have no exhaust restrictions.
I would use the 75 shot to start and keep it in the RPM range that your cam and heads work the best, the higher RPM's you run with the nitrous the less load you put on the bottom end.
If you look at how nitrous works, it gives you a certin HP increase across the RPM range, at lower RPM's you see lots of torque, at the high end the torque drops off, but the HP increase from nitrous stays about the same across the RPM range provided you have no exhaust restrictions.
I would use the 75 shot to start and keep it in the RPM range that your cam and heads work the best, the higher RPM's you run with the nitrous the less load you put on the bottom end.