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ran worse after nitrous at the track

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Old 04-16-2006, 09:48 PM
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Default ran worse after nitrous at the track

Took my 97 lt1 firebird to the track for the first time with my TNT wet kit spraying a 100 shot. Bottle was at 900 psi. I do not have a purge, window switch, or retard box. I hit it a couple times before running to clear the lines. My best last season was a 12.97 @ 103 with a 1.79 60 ft before the nitrous and lt's. First pass:
12.99 @ 106 with a 1.95 60 ft. All passes after that got progressivly slower, with the last being a 13.25 @ 102 with a 1.89 60 ft. All passes were done on nitrous. I pulled the lines off the nozzles and hit the micro switch, and it sprayed fuel and nitrous, so the kit is working fine. As I ran, I could feel it hitting I thought, but it didn't do anything.

What i've checked so far and what could be the problem
I pulled my rear 02's out when I put in my ORY, and didn't use sims or get it tuned out. Scanned the car today, and its throwing 2 rear o2 codes, and 2 egr codes, since I pulled the egr out and havn't got that tuned out yet as well.
Checked over the whole system, solenoids click when the microswitch is engauged.
I've raced a couple friends from a roll, NA then spray, and you can see in the video I pull a little harder with the spray, but not much.

I'm wondering since I'm not retarding the timing, is this killing me? Also, I'm stilling running tr-55's instead of colder tr-6's. The kit has never felt like it was really "hitting" like everyone says it does. I thought maybe it was because it was from a higher roll and lt1's don't make great power up top, but after running at the track, there is definetly something wrong. Any ideas?
Old 04-16-2006, 09:54 PM
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sounds like you are just spray fuel....pull just the n2o line off and check it.

Also are you sure your pedal is hitting all the way to the floor. make sure it's going all the way to the floor as maybe your system isn't engaging

other than that maybe you should check your jets for rigt sixing

also tr-55's and stock timing isn't gonna hurt you with 100 shot....i would def change the plugs but it's not gonna make you slower....the system should still hit pretty hard!
Old 04-16-2006, 10:01 PM
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whats with this lately?? You are lucky you didnt destroy the motor by running those plugs while spraying as well. Make sure your bottle is not full of air, weigh it before and after a fill. A bunch of air will kill power and have you running very rich. If you have a scanner check for knock retard. Sounds like something isnt right with your system. If you purged did it come out as a thick white cloud because that is a key indicator of there being air in the system. Thick cloud = nitrous No cloud =AIR
Old 04-16-2006, 10:04 PM
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Sounds like you're spinning the tires a bit when it hits.

Not sure how it goes but does the LT1 computer pull timing when it throws a code? I've heard some codes on the LS1 pull out timing when they're thrown.
Old 04-16-2006, 10:06 PM
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I pulled the nitrous line off, and it was spraying nitrous, a big white cloud. I weighed the bottle before and after, and it weighed the extra 10 pounds. The kit does engage with my peddle is to the floor, i could feel it hit, but it didn't do anything. Also went over the jets a couple times to make sure they were right. Tires doen't spin at all when it hits from like a 40 roll, but down low, they spin like crazy but they always have so I can't tell if its from the nitrous or not. This has me baffled. Thanks for the input, any other ideas?

Last edited by matrik; 04-16-2006 at 10:17 PM.
Old 04-16-2006, 11:03 PM
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check the jets. maybe some corrision or something in there. do you have any freinds with different jets you could test. did you test it at the line and the nozzle.
Old 04-16-2006, 11:08 PM
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The jets were brand new, but I can try switching them out. I only checked the nitrous at the line where it plugs into the nozzle, not spraying it throught he nozzle itself, since i was at the track. Didn't have time to pull the plate off the throttle body there, but i'll definetly try it.
Old 04-16-2006, 11:25 PM
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if you weighed the bottle before and after and its still exactly 10 lbs then you havent sprayed anything when running. You may be getting something manually engaging it. But if you still...and alwasy had 10 lbs...then your not spraying. You should be using more than a lb per run at the track and on the street. Are you SURE you have nitrous in the bottle? ABSOLUTELY SURE? If it really is still 10 lbs...its not being sprayed while running.
Old 04-16-2006, 11:33 PM
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When I purge the line, its clear without a cloud, also does my brothers. Is that bad nitrous????I never seen my purge, is only the sound...
Old 04-16-2006, 11:46 PM
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Originally Posted by ws6formula98
When I purge the line, its clear without a cloud, also does my brothers. Is that bad nitrous????I never seen my purge, is only the sound...
you live in a drive climate, as far as i know the white cloud is partially from the moisture in the air freezing.
Old 04-16-2006, 11:49 PM
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Originally Posted by 383LQ4SS
if you weighed the bottle before and after and its still exactly 10 lbs then you havent sprayed anything when running. You may be getting something manually engaging it. But if you still...and alwasy had 10 lbs...then your not spraying. You should be using more than a lb per run at the track and on the street. Are you SURE you have nitrous in the bottle? ABSOLUTELY SURE? If it really is still 10 lbs...its not being sprayed while running.
I meant it weighs the extra 10 lbs Using a lb. per run? Most of my friends get about 20 passes on there 10 lb. bottles.
Old 04-16-2006, 11:50 PM
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Me and my brother where wondering why, we where guessing because we didnt have a bottle heater..
Old 04-17-2006, 12:16 AM
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if your doing full 1/4 mile passes with a TNT 100 shot on a 10 lb bottle youll be lucky to get 5 passes...maybe a few more.

Id say filler up and try again.
Old 04-17-2006, 06:44 AM
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Originally Posted by matrik
I meant it weighs the extra 10 lbs Using a lb. per run? Most of my friends get about 20 passes on there 10 lb. bottles.
WHAT??? There aint no way to get a full 20 passes out of a 10lb bottle.
Old 04-17-2006, 06:59 AM
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Originally Posted by matrik
I meant it weighs the extra 10 lbs Using a lb. per run? Most of my friends get about 20 passes on there 10 lb. bottles.

I am lucky to get 10 passes out of my 15lb bottle. (150shot). I think your friends are blowing smoke up your ****.
Old 04-17-2006, 08:20 AM
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i usually get about 6-7 passes out of my 10 bottle. do you have other jets to test it with? if not i have some that might help you figure it out. did you check the nitrous filter? It still sounds like you were only spraying the fuel like i thought at the track... anyway let me know what you find.
Old 04-17-2006, 11:32 AM
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I have other jets i'm gonna try out on wed. when i get my car. When we pulled it apart at the track, it was spraying fuel and nitrous out the lines, so i'm not sure. I'm gonna weight the bottle and see how much is left now and that should be a good indication. When we have the car parked and I hit the gas to the floor, it activates the WOT switch, so i'm pretty sure its being activated. I can feel it do something, but it doesn't "hit" at all. I havn't checked the nitrous filter yet either, gotta pull it off the back of the solenoid. But if it sprays out the line like crazy when I have it off, wouldn't that mean its not clogged?
Old 04-17-2006, 12:27 PM
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You are probably just running more than 10% too rich.
Check that the jets are in the correct position in your nozzle and not swapped. If they aren't swapped, then consider either upping the bottle pressure, or decreasing the fuel jet size.
Old 04-17-2006, 12:39 PM
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Jets were correct, and the lines were correct on the nozzles as well. For jet size, I went by what TNT says on the jet size card they send with the kit, I think it was 22 nitrous, 39 fuel, or the other way around for a 100 shot.
Old 04-17-2006, 12:45 PM
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Originally Posted by matrik
Jets were correct, and the lines were correct on the nozzles as well. For jet size, I went by what TNT says on the jet size card they send with the kit, I think it was 22 nitrous, 39 fuel, or the other way around for a 100 shot.
yeah that's exactly what I'm talking about.
Try 39 nitrous and 22 fuel next time.



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