Nitrous missing in second-third gear
I've read so many threads on how people get away with no tuning and no retard up to a 100 shot. Figured I would be one of them.
But for a wideband 02 and a tune would be close to another $1k, that would bring up my total to almost $3k, I don't think so. Granted I could use the o2 in the future (just like the fuel pump), but that's a long ways away.
But for a wideband 02 and a tune would be close to another $1k, that would bring up my total to almost $3k, I don't think so. Granted I could use the o2 in the future (just like the fuel pump), but that's a long ways away.
JB,
We always suggest knowing if the car is running rich or lean. The guys that just put it on and hope its right are the guys that always tear something up. Then they blame it on nitrous.
When using power adders no matter what type air fuel is critiacl. So is timming, and fuel supply.
I think we need to back up a minute and figure out why your car is pinging..
Its either running lean from not enouigh fuel pump or needs bigger fuel jets. Or it has to much timming. The spark plug gap could be a problem but shoudl not cause pinging.
I just reread your origianal post. It says the fuel pressure drops to the low 50s.
How low exactly and how does it recover?
Dave
We always suggest knowing if the car is running rich or lean. The guys that just put it on and hope its right are the guys that always tear something up. Then they blame it on nitrous.
When using power adders no matter what type air fuel is critiacl. So is timming, and fuel supply.
I think we need to back up a minute and figure out why your car is pinging..
Its either running lean from not enouigh fuel pump or needs bigger fuel jets. Or it has to much timming. The spark plug gap could be a problem but shoudl not cause pinging.
I just reread your origianal post. It says the fuel pressure drops to the low 50s.
How low exactly and how does it recover?
Dave
TECH Apprentice
Joined: Dec 2005
Posts: 366
Likes: 0
No one should run nitrous for any length of time without knowing if their setup is lean or rich. It should be the first disclaimer when reading the instructions and preclude every sale.
Originally Posted by Nitro Dave's Nitrous Outlet
JB,
We always suggest knowing if the car is running rich or lean. The guys that just put it on and hope its right are the guys that always tear something up. Then they blame it on nitrous.
When using power adders no matter what type air fuel is critiacl. So is timming, and fuel supply.
I think we need to back up a minute and figure out why your car is pinging..
Its either running lean from not enouigh fuel pump or needs bigger fuel jets. Or it has to much timming. The spark plug gap could be a problem but shoudl not cause pinging.
I just reread your origianal post. It says the fuel pressure drops to the low 50s.
How low exactly and how does it recover?
Dave
We always suggest knowing if the car is running rich or lean. The guys that just put it on and hope its right are the guys that always tear something up. Then they blame it on nitrous.
When using power adders no matter what type air fuel is critiacl. So is timming, and fuel supply.
I think we need to back up a minute and figure out why your car is pinging..
Its either running lean from not enouigh fuel pump or needs bigger fuel jets. Or it has to much timming. The spark plug gap could be a problem but shoudl not cause pinging.
I just reread your origianal post. It says the fuel pressure drops to the low 50s.
How low exactly and how does it recover?
Dave
TECH Fanatic
iTrader: (5)
Joined: Aug 2007
Posts: 1,053
Likes: 1
From: colorado springs Elevation: 6035 ft
Nitrous outlet plate kit with 62n 38f jets, 38* of timing pulling 8 out with the mallory 685, walbro 255 pump with racetronix hotwire kit and new fuel filter Bottle had 9 pounds in it and was at 1050 at the begining of the run and 800psi at the end of the run. Runs great in first and half of second but then starts to miss and lose alot of power. It even detonated once when pulling 6* of timing so I upped it to 8*. 91 octane pump gas as well. I'm thinking I could be going rich still from pressure loss?
You should not be seeing that amount of pressure drop. You either have a bad bottle fill or there is not as much nitrous in the bottle as you think.
First thing we need to determain is why the huge pressure drop.
How is the bottle mounted in the car?
If you hold the bottle in your hands and crack open the valve does it stay a huge white solid cloud?
Dave
First thing we need to determain is why the huge pressure drop.
How is the bottle mounted in the car?
If you hold the bottle in your hands and crack open the valve does it stay a huge white solid cloud?
Dave
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Awesome K5 Blazer Restomod Comes With C7 Corvette Power
Verdad Gallardo
10 Camaros You Should Never Buy
10 LS Engine Myths That Refuse to Die
Verdad Gallardo TECH Fanatic
iTrader: (5)
Joined: Aug 2007
Posts: 1,053
Likes: 1
From: colorado springs Elevation: 6035 ft
The bottle is mounted like this. See pic. When I purge there is a nice white cloud of nitrous. Maybe the angle of the bottle is not enough? It is olmost flat with a sligh angle.
TECH Fanatic
iTrader: (5)
Joined: Aug 2007
Posts: 1,053
Likes: 1
From: colorado springs Elevation: 6035 ft
Here is a vid, I mean sound clip of the run. You can hear it breaking up in third. http://s170.photobucket.com/albums/u...sticvsz282.flv
That was the second run.
Here is the first run.It pulled better in third except for a little detonation at the end. http://s170.photobucket.com/albums/u...=stivsz281.flv
That was the second run.
Here is the first run.It pulled better in third except for a little detonation at the end. http://s170.photobucket.com/albums/u...=stivsz281.flv
Last edited by pyro719; Apr 25, 2009 at 08:18 PM.
Here is a vid, I mean sound clip of the run. You can hear it breaking up in third. http://s170.photobucket.com/albums/u...sticvsz282.flv
That was the second run.
Here is the first run.It pulled better in third except for a little detonation at the end. http://s170.photobucket.com/albums/u...=stivsz281.flv
That was the second run.
Here is the first run.It pulled better in third except for a little detonation at the end. http://s170.photobucket.com/albums/u...=stivsz281.flv
Good luck! 
TECH Fanatic
iTrader: (5)
Joined: Aug 2007
Posts: 1,053
Likes: 1
From: colorado springs Elevation: 6035 ft
I'm pretty sure my problem is loss of bottle pressure and not enough nitrous in the bottle. I'm going to get the bottle topped off, 10lb's this time, and spray it in third gear and see if it still does this? And go from there. It shouldnt be dropping 200 psi on one run.
