n2o and n/a tune help.

03 R Code · June 16th, 2007, 12:35 PM

Can a flip switch SCT tune get stuck on the wrong tune? I was running at the track last night, and the first run on nitrous felt incredibly weak, so I closed the bottle, and put the switch back to the n/a tune. The next run felt horrible. My MPH was way off, and the e.t. reflected that. It doesn't feel like it's pulling the way it should on the n/a tune. Kina feels like the nitrous tune, but without the nitrous. Maybe the timing didn't reset when I threw the swtich? Can that happen?

White99stang · June 16th, 2007, 12:36 PM

your switch could have went bad, but really the nitrous tune shouldn't be that much different, a couple of degrees of timing only pulls maybe 10or 15 hp max

03 R Code · June 16th, 2007, 02:00 PM

Yeah, I was thinking only a couple degrees of timming... Maybe I'm just being paranoid and over reacted. If I am right about it not running the same, what else could it be... Not a fuel filter or a mis fire cause it's got a smooth even pull through the rpm's. Like I said, it just feels like it lost power.

Oh yeah, I never heard any detonation during either run, so I don't think it's the computer pulling any more timing...

acmillr · June 16th, 2007, 10:50 PM

Did you get a check engine light? If so, pull your kick panel and make sure your chip is still pushed all the way into the housing. On second thought, you may not have gotten a check engine light depending on what mods you have. Mine came out a litte one time and tripped back into the factory settings- I thought my motor was F-ed up.

03 R Code · June 17th, 2007, 03:11 AM

I'll check that in the morning.

zerofx150 · June 17th, 2007, 02:16 PM

You could have got some bad nitrous, i have a buddy down here in Ada and he got a bottle of bad juice.

acmillr · June 17th, 2007, 02:47 PM

Did you figure anything out?

03 R Code · June 17th, 2007, 09:24 PM

Nope, I got drun last night and woke up late this morning and left for Daytona... I need to get out there and look at it. But I'm really tired right now! I'm thinking it was just in my head when I made the N/A run after the nitrous stopped working like it should. Just gotta figure out if the bottle maybe has a slow leak and it ran out and I didn't know it. Even if there is just a little bit if nitrous left the pressure gauge can still read 900psi on a hot day right?

acmillr · June 17th, 2007, 09:46 PM

Yeah, it can read the correct PSI even on a bottle that is almost empty. That is why it is important to have a gauge you can see in the cockpit. If the pressure drops quickly into a run, your bottle is getting low. If the bottle is almost out, the psi will drop noticably after a short purge.

June 16th, 2007, 12:35 PM	#1
03 R Code MM Fanatic unstoppable @ speed of light Join Date: Jul 2006 Location: Knees deep in dat ass Posts: 3,103 iTrader: 0 reviews	n2o and n/a tune help. Can a flip switch SCT tune get stuck on the wrong tune? I was running at the track last night, and the first run on nitrous felt incredibly weak, so I closed the bottle, and put the switch back to the n/a tune. The next run felt horrible. My MPH was way off, and the e.t. reflected that. It doesn't feel like it's pulling the way it should on the n/a tune. Kina feels like the nitrous tune, but without the nitrous. Maybe the timing didn't reset when I threw the swtich? Can that happen? __________________ Political correctness is a doctrine fostered by a delusional, illogical, liberal minority, and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a turd by the clean end.

June 16th, 2007, 12:36 PM	#2
White99stang MM's nicest mod, :) Join Date: Aug 2005 Location: Apex, NC Posts: 3,718 iTrader: 0 reviews	your switch could have went bad, but really the nitrous tune shouldn't be that much different, a couple of degrees of timing only pulls maybe 10or 15 hp max __________________ 06 Dodge MegaCab Diesel 455rwhp/815rwtq REAL TRUCKS DON'T USE SPARK PLUGS

June 16th, 2007, 02:00 PM	#3
03 R Code MM Fanatic unstoppable @ speed of light Join Date: Jul 2006 Location: Knees deep in dat ass Posts: 3,103 iTrader: 0 reviews	Yeah, I was thinking only a couple degrees of timming... Maybe I'm just being paranoid and over reacted. If I am right about it not running the same, what else could it be... Not a fuel filter or a mis fire cause it's got a smooth even pull through the rpm's. Like I said, it just feels like it lost power. Oh yeah, I never heard any detonation during either run, so I don't think it's the computer pulling any more timing... __________________ Political correctness is a doctrine fostered by a delusional, illogical, liberal minority, and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a turd by the clean end.

June 16th, 2007, 10:50 PM	#4
acmillr MM's Mad Scientist Slow Fella Join Date: Jul 2006 Location: Tupelo, MS Posts: 5,120 iTrader: 2 reviews	Did you get a check engine light? If so, pull your kick panel and make sure your chip is still pushed all the way into the housing. On second thought, you may not have gotten a check engine light depending on what mods you have. Mine came out a litte one time and tripped back into the factory settings- I thought my motor was F-ed up. __________________

June 17th, 2007, 03:11 AM	#5
03 R Code MM Fanatic unstoppable @ speed of light Join Date: Jul 2006 Location: Knees deep in dat ass Posts: 3,103 iTrader: 0 reviews	I'll check that in the morning. __________________ Political correctness is a doctrine fostered by a delusional, illogical, liberal minority, and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a turd by the clean end.

June 17th, 2007, 02:16 PM	#6
zerofx150 Regular 2003 GT 13.6 @ 101 Join Date: Feb 2007 Location: Ada OK Posts: 387 iTrader: 0 reviews	You could have got some bad nitrous, i have a buddy down here in Ada and he got a bottle of bad juice. __________________ 03 GT 5sp, K&N FIPK, MAC LT ceramic coated headers, MAC Prochamber, Steeda Tri-ax, 3.73, SCT X-cal2 tuned by D&G Dyno Tune, NX plate Kit, Eibach Pro Springs, CMS Stage 2 cams. STRIKE design from MK Motorsports.

June 17th, 2007, 02:47 PM	#7
acmillr MM's Mad Scientist Slow Fella Join Date: Jul 2006 Location: Tupelo, MS Posts: 5,120 iTrader: 2 reviews	Did you figure anything out? __________________

June 17th, 2007, 09:24 PM	#8
03 R Code MM Fanatic unstoppable @ speed of light Join Date: Jul 2006 Location: Knees deep in dat ass Posts: 3,103 iTrader: 0 reviews	Nope, I got drun last night and woke up late this morning and left for Daytona... I need to get out there and look at it. But I'm really tired right now! I'm thinking it was just in my head when I made the N/A run after the nitrous stopped working like it should. Just gotta figure out if the bottle maybe has a slow leak and it ran out and I didn't know it. Even if there is just a little bit if nitrous left the pressure gauge can still read 900psi on a hot day right? __________________ Political correctness is a doctrine fostered by a delusional, illogical, liberal minority, and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a turd by the clean end.

June 17th, 2007, 09:46 PM	#9
acmillr MM's Mad Scientist Slow Fella Join Date: Jul 2006 Location: Tupelo, MS Posts: 5,120 iTrader: 2 reviews	Yeah, it can read the correct PSI even on a bottle that is almost empty. That is why it is important to have a gauge you can see in the cockpit. If the pressure drops quickly into a run, your bottle is getting low. If the bottle is almost out, the psi will drop noticably after a short purge. __________________

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