Nitrous, why are diesel nitrous kits so expensive?
07-10-2007, 06:29 PM
#61
Registered User
Join Date: Apr 2003
Location: Cummins Technical Center, IN
Posts: 6,564
Likes: 0
Received 6 Likes
on
5 Posts
My thinking is that the stock turbo is only reasonably efficient up to 32psi or so. I'd want the WG to open before the nitrous hits as a precaution.
JH
07-10-2007, 10:41 PM
#65
Registered User
Join Date: Apr 2003
Location: Cummins Technical Center, IN
Posts: 6,564
Likes: 0
Received 6 Likes
on
5 Posts
I used to think the same way, but it's not only the temp of the air, but the density. If you cool the air pre CAC, then the air in the CAC is more dense (I know, stating the obvious). The more dense air charge will radiate more BTU's of heat then a less dense charge. Let me put it this way. If you have a hot bolt, which cools it faster. Air or water? At some point of temp vs density, the temp will win, but with the temp differences that we have in our trucks the density appears to be more effective.
Paul
Paul
Hopefully someone else will take it up and post on my behalf.
jh
07-11-2007, 12:48 AM
#66
Registered User
Join Date: Sep 2003
Location: stupid ohio
Posts: 1,300
Likes: 0
Received 0 Likes
on
0 Posts
As for the bottle warmer, I can see how that's important for consistency in bracket racing or whatever, but I don't see that as a necessity in my usage. The bottle would be used for such a short time, and with lots of time between uses that a bottle warmer isn't really that necessary.
bnraond.
07-11-2007, 02:28 AM
#67
Registered User
Join Date: Apr 2003
Location: Cummins Technical Center, IN
Posts: 6,564
Likes: 0
Received 6 Likes
on
5 Posts
Brandon, if the pressure is that low, you're not getting much flow. You're using less nitrous. Disappointing, perhaps-- but I wouldn't call it wasteful. It's no different than a car using less gass because the throttle is closed.
Your point about cold weather is well taken. It's like trying to use a can of spray paint off the shelf of a sub-zero garage. It doesn't work too well!
Your point about cold weather is well taken. It's like trying to use a can of spray paint off the shelf of a sub-zero garage. It doesn't work too well!
07-12-2007, 11:03 PM
#68
Registered User
I used to think the same way, but it's not only the temp of the air, but the density. If you cool the air pre CAC, then the air in the CAC is more dense (I know, stating the obvious). The more dense air charge will radiate more BTU's of heat then a less dense charge. Let me put it this way. If you have a hot bolt, which cools it faster. Air or water? At some point of temp vs density, the temp will win, but with the temp differences that we have in our trucks the density appears to be more effective.
Paul
Paul
)Mike, I do tend to use the terms "air" and "nitrous" interchangably - albeit in a loose sense. They both are roughly 70% nitrogen & 28% oxygen by weight... or is that volume?
07-13-2007, 06:28 AM
#69
Chapter President
Thread Starter
The nitrous going into the CAC can't breakdown into it's two seperate parts (oxygen and nitrogen) at the temps. you quoted earlier. That's why I questioned the term extra air. The extra O2 benefited by using nitrous won't be seen until further up stream. If I had to guess, somewhere roughly around the intake valves.
07-13-2007, 06:33 AM
#70
Chapter President
Thread Starter
07-13-2007, 06:41 PM
#71
Registered User
Join Date: Apr 2003
Location: Cummins Technical Center, IN
Posts: 6,564
Likes: 0
Received 6 Likes
on
5 Posts
I should have said that I disagree that pre-CAC is better than post-CAC.
Obviously nitrous improves density due to cooling-- so the excerpt of my post quoted above is clearly wrong.
I'm still trying to reason this through and see if I can come up with the time and skill to make it happen.
Obviously nitrous improves density due to cooling-- so the excerpt of my post quoted above is clearly wrong.
I'm still trying to reason this through and see if I can come up with the time and skill to make it happen.
07-13-2007, 07:05 PM
#72
Chapter President
Thread Starter
I knew what you what you were saying. I was using the quote more because you decided you wouldn't be able to add more to the thread due to time limitations.
07-14-2007, 12:40 AM
#73
Registered User
Join Date: Sep 2003
Location: stupid ohio
Posts: 1,300
Likes: 0
Received 0 Likes
on
0 Posts
I should have said that I disagree that pre-CAC is better than post-CAC.
Obviously nitrous improves density due to cooling-- so the excerpt of my post quoted above is clearly wrong.
I'm still trying to reason this through and see if I can come up with the time and skill to make it happen.
Obviously nitrous improves density due to cooling-- so the excerpt of my post quoted above is clearly wrong.
I'm still trying to reason this through and see if I can come up with the time and skill to make it happen.
bnranod.
07-15-2007, 04:06 PM
#74
Registered User
Join Date: Apr 2002
Location: Hershey, PA
Posts: 1,250
Likes: 0
Received 0 Likes
on
0 Posts
Going pre-CAC has consistantly shown a power increase...... Besides the HP gain using the same jet size we were also able to induce a larger amount of nitrous earlier and throughout the rpm range increasing HP even above this amount just the pre-CAC HP level. Depending upon the setup I have made well over 75 RWHP more this way.
Doug
Doug
07-15-2007, 08:55 PM
#75
Registered User
Join Date: Apr 2003
Location: Cummins Technical Center, IN
Posts: 6,564
Likes: 0
Received 6 Likes
on
5 Posts
OK-- but what I want to know is WHY WHY WHY!!
You guys know me-- I want to understand WHY something is, not just that it is.
thanks for explaining.
Justin
You guys know me-- I want to understand WHY something is, not just that it is.
thanks for explaining.
Justin