dixiepromod wrote:
yes I have noticed a performance decline with dramtic purging: i.e. if the pressure gets up to 1400psi, on a very hot day for instance - which means a considerable amount of purging is mandatory to get the pressure down before launching the car. However I normally attributed this to simply having to 'bleed off too much of the nitrous reserve' . Yes, I do believe mph suffers when this is necessary, because bottle pressure simply falls more quickly - because there is less nitrous in the bottle at launch.
Now, where am I wrong on this one?
Find a way of purging off gas to reduce pressure, it works far better, especially if you do it with plenty of time ahead of you before your run
Dixiepromod wrote:
Nitrogen boosting has never made sense to me. I simply can't afford the parts attrition, as I've seen it tried over the years. I was at the meet where Shannon Jenkins ran the 3.99 8th mile pass earlier this year. He was on boost and burned up more blessed parts at that meet, than I could likely replace in 2 years. I was, yet was not, impressed at the same time. Actually, there were at least a couple of nitrous cars at that meet that perhaps could have ran every bit as quick, or even quicker, if they'd had the budget just to 'fry' all the parts he did.
I'm not saying this to be a smartass, or rude, or disrespectful;
But this is the same as saying Trev makes the same nitrous "kit" as NX and puts a different sticker on it.
When you base a theory on a flawed observation you can only obtain a flawed theory.
The pressure boosting with nitrogen didn't burn anything up on its own and to be honest i'm a little suprised you'd think i'd recomend something that could cause you damage.
Now this isn't a nitrogen boosting thread, its about gas laws.
BUT
at the moment you race with high start pressures (lean mix) and low finish pressures (rich mix)
Totally ass about face for a fast et AND high terminal for which you need to start rich and end lean.
The first is a characteristic of stored nitrous use, the second could be the characteristic of nitrogen boosted nitrous use.
I say "could" because the nitrogen boosted nitrous "could" do anything you want as far as mixture / pressure goes.
Gradual richening, mixture maintenance, gradual leaning off..............
Pick your favourite poison basically.
The only "damage" danger comes from the fact a basic nitrogen boost wouldn't cool the motor off towards the end of the run with extra fuel............ If you required such a thing after starting off rich that is......