Nitrous question?
Thread Starter
Team Owner
Joined: Jul 2001
Posts: 182,997
Likes: 88
From: Lakeland, FL
Cruise-In IV-V-VI-VII-VIII Veteran
St. Jude Donor '03, '06, '17
Nitrous question?
Made my last licensing run today and I ran a 100 shot on that run.. My last run with a 100 shot was 9.57 @ 143 mph.. Today, I only ran 9.97 @ 135.50 mph. The car seemed to run awfully rich and when I purged the nitrous, the nitrous cloud was very transparent.. It used to be very white on my last run about a month ago. I weighted the bottle before I put it into the car and it showed 18 lbs (bottle weights 14 lbs empty), so I thought that I was good to go.. The bottle has been sitting in the hot garage for a month or so, so I wonder if it affects the nitrous if it's sitting for a long time? Is it possible that 4 lbs of nitrous in the bottle wasn't enough? What could be the reason for the almost transparent nitrous cloud?
I did flow the nitrous system before the run and set the correct fuel pressure, so I doubt that the nitrous tune was off...
Any input is appreciated!
I did flow the nitrous system before the run and set the correct fuel pressure, so I doubt that the nitrous tune was off...
Any input is appreciated!
Racer
Joined: Jul 2004
Posts: 332
Likes: 0
From: Geneva Ohio
For best results top the bottle off before each outing.
Nitrous doesn't get old but when the bottle gets below half you will see a noticable drop in performance.
Using a 100 shot you will probably get 3-4 good runs on a full bottle. If you purge before and after each run maybe less.
When you get on a serious nitrous diet you will want to have several full bottles to start the day and change after every second pass.
Nitrous doesn't get old but when the bottle gets below half you will see a noticable drop in performance.
Using a 100 shot you will probably get 3-4 good runs on a full bottle. If you purge before and after each run maybe less.
When you get on a serious nitrous diet you will want to have several full bottles to start the day and change after every second pass.
Thread Starter
Team Owner
Joined: Jul 2001
Posts: 182,997
Likes: 88
From: Lakeland, FL
Cruise-In IV-V-VI-VII-VIII Veteran
St. Jude Donor '03, '06, '17
For best results top the bottle off before each outing.
Nitrous doesn't get old but when the bottle gets below half you will see a noticable drop in performance.
Using a 100 shot you will probably get 3-4 good runs on a full bottle. If you purge before and after each run maybe less.
When you get on a serious nitrous diet you will want to have several full bottles to start the day and change after every second pass.
Nitrous doesn't get old but when the bottle gets below half you will see a noticable drop in performance.
Using a 100 shot you will probably get 3-4 good runs on a full bottle. If you purge before and after each run maybe less.
When you get on a serious nitrous diet you will want to have several full bottles to start the day and change after every second pass.
Race Director
Joined: Jan 2000
Posts: 13,017
Likes: 2,261
From: Corsicana, Tx
2020 C2 of the Year - Modified Winner
2020 Corvette of the Year (performance mods)
C2 of Year Winner (performance mods) 2019
2017 C2 of Year Finalist
Any idea what bottle pressure was?
As the amount of nitrous gets lower...there is a quicker drop off in pressure as you use more.
Years ago when I ran a lot of N20..it ws getting to be a PITA. I had 6 bottles I took with me to the track and had them all full before I left. Got pretty expensive and a lot of work. Should have bought my own refilling station.
I think you just ran out of juice!
Time to stock up!
We've been wondering where you've been.
JIM
As the amount of nitrous gets lower...there is a quicker drop off in pressure as you use more.
Years ago when I ran a lot of N20..it ws getting to be a PITA. I had 6 bottles I took with me to the track and had them all full before I left. Got pretty expensive and a lot of work. Should have bought my own refilling station.
I think you just ran out of juice!
Time to stock up!
We've been wondering where you've been.
JIM
Thread Starter
Team Owner
Joined: Jul 2001
Posts: 182,997
Likes: 88
From: Lakeland, FL
Cruise-In IV-V-VI-VII-VIII Veteran
St. Jude Donor '03, '06, '17
Any idea what bottle pressure was?
As the amount of nitrous gets lower...there is a quicker drop off in pressure as you use more.
Years ago when I ran a lot of N20..it ws getting to be a PITA. I had 6 bottles I took with me to the track and had them all full before I left. Got pretty expensive and a lot of work. Should have bought my own refilling station.
I think you just ran out of juice!
Time to stock up!
We've been wondering where you've been.
JIM
As the amount of nitrous gets lower...there is a quicker drop off in pressure as you use more.
Years ago when I ran a lot of N20..it ws getting to be a PITA. I had 6 bottles I took with me to the track and had them all full before I left. Got pretty expensive and a lot of work. Should have bought my own refilling station.
I think you just ran out of juice!
Time to stock up!
We've been wondering where you've been.
JIM
Only got to make my last licensing run today as I was on vacation in Hawaii..
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Le Mans Master
Joined: Feb 2000
Posts: 7,032
Likes: 2
From: Newburgh NY
One other thing I have seen on cars with pressure over 1000psi and a new full load of N20 and blowing a clear cloud is the pickup tube in the bottle became unseated at the base of the head on the bottle. Probably not the case here but just something to consider. The bottle needs to be positioned correctly and the pickup tube functioning properly for everything to come together.
Just another .02!
Just another .02!
Thread Starter
Team Owner
Joined: Jul 2001
Posts: 182,997
Likes: 88
From: Lakeland, FL
Cruise-In IV-V-VI-VII-VIII Veteran
St. Jude Donor '03, '06, '17
The pressure was good, around 900 before and after the run.. The consistency of the nitrous seemed different.. In the video, you can't even see that I purged... it was so transparent..
Safety Car
Joined: Aug 2001
Posts: 3,892
Likes: 13
From: Pettis Performance 565 with two stages of Nitrous Supply nitrous 1.082, 4.61 at 155, 7.17 at 192
Any idea what bottle pressure was?
As the amount of nitrous gets lower...there is a quicker drop off in pressure as you use more.
Years ago when I ran a lot of N20..it ws getting to be a PITA. I had 6 bottles I took with me to the track and had them all full before I left. Got pretty expensive and a lot of work. Should have bought my own refilling station.
I think you just ran out of juice!
Time to stock up!
We've been wondering where you've been.
JIM
As the amount of nitrous gets lower...there is a quicker drop off in pressure as you use more.
Years ago when I ran a lot of N20..it ws getting to be a PITA. I had 6 bottles I took with me to the track and had them all full before I left. Got pretty expensive and a lot of work. Should have bought my own refilling station.
I think you just ran out of juice!
Time to stock up!
We've been wondering where you've been.
JIM
Ollie, to do it right, as others have said you need have full bottles. Nitrous can be very consistent if you have a full bottle for every run. I swap my bottle out every run. As the volume of nitrous in the bottle goes down you can keep the pressure up with heat, but there is no nitrous in the bottle. No doubt with only 4 lbs of nitrous in the bottle there was a serious performance decline based on that alone.
Congrats on the license
Thread Starter
Team Owner
Joined: Jul 2001
Posts: 182,997
Likes: 88
From: Lakeland, FL
Cruise-In IV-V-VI-VII-VIII Veteran
St. Jude Donor '03, '06, '17
Got any of those old bottles lying around ?? I could use a few more !! I only have 4. I use over two lbs. of nitrous in 5 seconds.
Ollie, to do it right, as others have said you need have full bottles. Nitrous can be very consistent if you have a full bottle for every run. I swap my bottle out every run. As the volume of nitrous in the bottle goes down you can keep the pressure up with heat, but there is no nitrous in the bottle. No doubt with only 4 lbs of nitrous in the bottle there was a serious performance decline based on that alone.
Congrats on the license
Ollie, to do it right, as others have said you need have full bottles. Nitrous can be very consistent if you have a full bottle for every run. I swap my bottle out every run. As the volume of nitrous in the bottle goes down you can keep the pressure up with heat, but there is no nitrous in the bottle. No doubt with only 4 lbs of nitrous in the bottle there was a serious performance decline based on that alone.
Congrats on the license
Safety Car
Joined: Aug 2001
Posts: 3,892
Likes: 13
From: Pettis Performance 565 with two stages of Nitrous Supply nitrous 1.082, 4.61 at 155, 7.17 at 192
Thread Starter
Team Owner
Joined: Jul 2001
Posts: 182,997
Likes: 88
From: Lakeland, FL
Cruise-In IV-V-VI-VII-VIII Veteran
St. Jude Donor '03, '06, '17
