How long can you spray nitrous......roll race....?
12-13-2015, 04:01 PM
#1
How long can you spray nitrous......roll race....? I'm curious....if I built a fully forged iron block LQ9 like my LQ9 390ci, but 11.5:1 compression and sprayed a dual stage 400 shot....
Can it be sprayed long enough to complete a 50mph-180mph roll race...?
Or is that too long to spray.....? How can you cool a shot like the boost guys do with meth or water?
Is there a head lifting problem with 4-bolt heads with a 400 shot?
We have the block, we are planning on building a max effort N/A engine as many cubic inches as we can go as to not make any weak points.
Or, should we get an aluminum block and resleeve it and build a 434ci....then spray that with the dual stage 400 shot?
We want a roll race beast.
.
Can it be sprayed long enough to complete a 50mph-180mph roll race...?
Or is that too long to spray.....? How can you cool a shot like the boost guys do with meth or water?
Is there a head lifting problem with 4-bolt heads with a 400 shot?
We have the block, we are planning on building a max effort N/A engine as many cubic inches as we can go as to not make any weak points.
Or, should we get an aluminum block and resleeve it and build a 434ci....then spray that with the dual stage 400 shot?
We want a roll race beast.
.
12-13-2015, 04:11 PM
#2
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I can't speak for a 400 shot, but at a 100 shot I sprayed all through 5th gear on my Mustang. That was like 60 to 160. No issues when I did that but I only did it the one time
12-13-2015, 06:15 PM
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If you want to spray nitrous without any issues
1- As your nitrous psi not below 900PSI you're fine .
2- people says 10-20seconds that's wrong
3-When you spray the fuel PSI will be the same . The Nitrous PSI will drops each second .
4- there's cars can spray on 5 gears and cars backfire depends on the nitrous PSI
1- As your nitrous psi not below 900PSI you're fine .
2- people says 10-20seconds that's wrong
3-When you spray the fuel PSI will be the same . The Nitrous PSI will drops each second .
4- there's cars can spray on 5 gears and cars backfire depends on the nitrous PSI
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12-13-2015, 07:10 PM
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If you want to spray nitrous without any issues
1- As your nitrous psi not below 900PSI you're fine .
2- people says 10-20seconds that's wrong
3-When you spray the fuel PSI will be the same . The Nitrous PSI will drops each second .
4- there's cars can spray on 5 gears and cars backfire depends on the nitrous PSI
1- As your nitrous psi not below 900PSI you're fine .
2- people says 10-20seconds that's wrong
3-When you spray the fuel PSI will be the same . The Nitrous PSI will drops each second .
4- there's cars can spray on 5 gears and cars backfire depends on the nitrous PSI
12-14-2015, 04:22 AM
#10
If you want to spray nitrous without any issues
1- As your nitrous psi not below 900PSI you're fine .
2- people says 10-20seconds that's wrong
3-When you spray the fuel PSI will be the same . The Nitrous PSI will drops each second .
4- there's cars can spray on 5 gears and cars backfire depends on the nitrous PSI
1- As your nitrous psi not below 900PSI you're fine .
2- people says 10-20seconds that's wrong
3-When you spray the fuel PSI will be the same . The Nitrous PSI will drops each second .
4- there's cars can spray on 5 gears and cars backfire depends on the nitrous PSI
I would think you would just start to lose power gradually as psi dropped..........NO...?
Im asking the question of "how long" can I spray because I'm wondering if damage can occur from spraying too long. Like heat build-up, etc.....
And if heat is the issue, is there a way to cool the air/nitrous charge like the boost guys do with meth and water......?
Also....is a nitrogen push system worth the extra expense?
.
12-14-2015, 05:34 AM
#11
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So during a sprayed run, if the psi starts to drop off......what happens that can cause a problem or cause engine damage?
I would think you would just start to lose power gradually as psi dropped..........NO...?
Im asking the question of "how long" can I spray because I'm wondering if damage can occur from spraying too long. Like heat build-up, etc.....
And if heat is the issue, is there a way to cool the air/nitrous charge like the boost guys do with meth and water......?
Also....is a nitrogen push system worth the extra expense?
.
I would think you would just start to lose power gradually as psi dropped..........NO...?
Im asking the question of "how long" can I spray because I'm wondering if damage can occur from spraying too long. Like heat build-up, etc.....
And if heat is the issue, is there a way to cool the air/nitrous charge like the boost guys do with meth and water......?
Also....is a nitrogen push system worth the extra expense?
.
12-14-2015, 01:42 PM
#15
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pressure drop is the enemy. the more volume you have the less pressure drop you'll see. so running larger/multiple bottles will really help avoid that. also a progressive controller will help
in my mustang i used a 20 lbs bottle and a jacobs mastermind. made a pretty consistent and reliable setup.
in my mustang i used a 20 lbs bottle and a jacobs mastermind. made a pretty consistent and reliable setup.
Last edited by Tanus; 12-14-2015 at 01:48 PM.
12-14-2015, 02:28 PM
#17
Spraying long distances introduces the extra challenge of keeping the combustion chamber cool. As vehicle speeds increase, loads increase as does residual heat buildup. If you cannot keep the combustion chamber cool, the head will begin to melt near the spark plug area.
As for the argument of which is safer, rich or lean, they both can get you into trouble.
Here is one of the most experienced and knowledgeable people in the world on the subject on nitrous a/f mixtures:
As for the argument of which is safer, rich or lean, they both can get you into trouble.
Here is one of the most experienced and knowledgeable people in the world on the subject on nitrous a/f mixtures:
I personally, have NEVER burned up anything by being too lean.
You know, we talk about this all the time and make comparisons, but it is pretty much accepted, that a nitrous engine, is still a N/A engine and you tune it as such. So if you were running down the track on motor and your fuel pump quits, you have just run that engine as lean as lean can be. Did you hurt it..........highly unlikely. No fuel, nothing to burn, no heat. A nitrous motor is the same way.......too little fuel, it has nothing to burn, so it just makes no power, it does not eat parts.
I am sure, make that, I KNOW, that others will not agree and we hear stories of "I had a clogged fuel jet, burned my motor up", etc, etc, etc. All I can say, is that I have been using nitrous, for more than 30 years and I can say with conviction, that I have NEVER burned up a motor with a lean tune, nor have I had a piece of trash, or whatever, in a fuel jet, hurt anything. But that's just me..............lol
When people do attempt to get their tune more in line, by cleaning it up and fail to take additional timing out, is usually when the damage happens. Then they incorrectly deduce, that they got it too lean.
Monte
You know, we talk about this all the time and make comparisons, but it is pretty much accepted, that a nitrous engine, is still a N/A engine and you tune it as such. So if you were running down the track on motor and your fuel pump quits, you have just run that engine as lean as lean can be. Did you hurt it..........highly unlikely. No fuel, nothing to burn, no heat. A nitrous motor is the same way.......too little fuel, it has nothing to burn, so it just makes no power, it does not eat parts.
I am sure, make that, I KNOW, that others will not agree and we hear stories of "I had a clogged fuel jet, burned my motor up", etc, etc, etc. All I can say, is that I have been using nitrous, for more than 30 years and I can say with conviction, that I have NEVER burned up a motor with a lean tune, nor have I had a piece of trash, or whatever, in a fuel jet, hurt anything. But that's just me..............lol
When people do attempt to get their tune more in line, by cleaning it up and fail to take additional timing out, is usually when the damage happens. Then they incorrectly deduce, that they got it too lean.
Monte
12-14-2015, 02:56 PM
#18
Spraying long distances introduces the extra challenge of keeping the combustion chamber cool. As vehicle speeds increase, loads increase as does residual heat buildup. If you cannot keep the combustion chamber cool, the head will begin to melt near the spark plug area.
As for the argument of which is safer, rich or lean, they both can get you into trouble.
Here is one of the most experienced and knowledgeable people in the world on the subject on nitrous a/f mixtures:
As for the argument of which is safer, rich or lean, they both can get you into trouble.
Here is one of the most experienced and knowledgeable people in the world on the subject on nitrous a/f mixtures:
Well, in this day and age of technology....I assume there's got to be some kind of sensor/computer that monitors A/F during a hard run, and if it goes either way out of safe parameters it will just shut down everything.....?
During a roll race with no traffic in sight....that would be harmless...Just roll to a stop.
.
12-14-2015, 04:14 PM
#20
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For me personally for my new build i'm running Dual stages direct port 300 1st and 300 second and it's for rolling street race , I can spray as i'm not under 900 PSI and each stage has separate 12lbs carbon fiber bottles .
