Wavy torque curve. Please help!!
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TECH Regular
Joined: Feb 2003
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From: Jax, Fl
Wavy torque curve. Please help!! I recently had my car on a dyno. With a dry 100 shot, I only picked up 37hp and 90tq. The curve on the chart is really wavy. Up, down, up, down, and the waves are within 200 rpm of each other. It's like the nitrous is turning off and on. It drops from 413tq to 324tq, then back up. When I spray it driving down the street, I can feel the nitrous pulse on and off. What could be causing this? Anyone had this problem? Your help would be greatly appreciated.
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Joined: May 2002
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From: Jacksonville
Re: Wavy torque curve. Please help!! Nick,
Assuming your running a dry kit as indicated in your sig. I know some before the MAF style kits can be finicky on where you place the nozzles, too close vs too far away and vice versa. Do you think it's possible you have your nozzles too close to the maf and that they're freezing the sensors?
Personally I'd recommend a wet kit simply for it's a/f consistency over the dry..
<small>[ March 10, 2003, 06:29 AM: Message edited by: StealthStalkerLS1 ]</small>
Assuming your running a dry kit as indicated in your sig. I know some before the MAF style kits can be finicky on where you place the nozzles, too close vs too far away and vice versa. Do you think it's possible you have your nozzles too close to the maf and that they're freezing the sensors?
Personally I'd recommend a wet kit simply for it's a/f consistency over the dry..
<small>[ March 10, 2003, 06:29 AM: Message edited by: StealthStalkerLS1 ]</small>
On The Tree
Joined: Nov 2002
Posts: 168
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From: Crestview, FL
Re: Wavy torque curve. Please help!! Have you ATAP'd or logged the car. Mine was doing some similar on NX 100 wet shot, felt like the spray was pulsing. The car was pulling some timing from bad gas I had gotten, and bottle pressure was also a tad low.
Good Luck.
Good Luck.
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TECH Regular
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From: Jax, Fl
Re: Wavy torque curve. Please help!! </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by StealthStalkerLS1:
<strong> Nick,
Assuming your running a dry kit as indicated in your sig. I know some before the MAF style kits can be finicky on where you place the nozzles, too close vs too far away and vice versa. Do you think it's possible you have your nozzles too close to the maf and that they're freezing the sensors?
Personally I'd recommend a wet kit simply for it's a/f consistency over the dry.. </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">I put the jets right where it said to in the directions. Also, it didn't do it when I first installed the kit. It started doing it about two weeks after the install. I know that my A/F ratio was super rich on the dyno. I wonder if that has anything to do with it? It was 10 to 1 off the bottle. Anyway, I might try putting the jets a little farther back. Thanks for the advice.
To broke7, I haven't autotapped it yet. I'm getting a MAFT in about a week though. Maybe that will help.
<small>[ March 10, 2003, 06:26 PM: Message edited by: NickMapleT/A ]</small>
<strong> Nick,
Assuming your running a dry kit as indicated in your sig. I know some before the MAF style kits can be finicky on where you place the nozzles, too close vs too far away and vice versa. Do you think it's possible you have your nozzles too close to the maf and that they're freezing the sensors?
Personally I'd recommend a wet kit simply for it's a/f consistency over the dry.. </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">I put the jets right where it said to in the directions. Also, it didn't do it when I first installed the kit. It started doing it about two weeks after the install. I know that my A/F ratio was super rich on the dyno. I wonder if that has anything to do with it? It was 10 to 1 off the bottle. Anyway, I might try putting the jets a little farther back. Thanks for the advice.
To broke7, I haven't autotapped it yet. I'm getting a MAFT in about a week though. Maybe that will help.
<small>[ March 10, 2003, 06:26 PM: Message edited by: NickMapleT/A ]</small>
Thread Starter
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From: Jax, Fl
Re: Wavy torque curve. Please help!! </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by Nitro Dave's Performance:
<strong> Whats your bottle pressure at? Check your micro switch.
Dave </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">I keep my bottle at 900 or so with the heater. What would the microswitch be doing? Could it be messed up and causing that, or just out of adjustment? If it was out of adjustment, it would be a quick fix. I hope it isn't messed up.
<strong> Whats your bottle pressure at? Check your micro switch.
Dave </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">I keep my bottle at 900 or so with the heater. What would the microswitch be doing? Could it be messed up and causing that, or just out of adjustment? If it was out of adjustment, it would be a quick fix. I hope it isn't messed up.
