troubleshoot this dyno graph please...
troubleshoot this dyno graph please... I dynoed yesterday...I think the #'s are low for a 100 shot and after 4k, I have no clue what is causing this problem <img border="0" alt="[judgement]" title="" src="graemlins/gr_judge.gif" /> I dynoed 327/319 N/A...It is the 5177 kit with a single 100 shot jet...the bottle pressure was about 1100 psi...I heard it spray, and then it sprayed intermitantely thus causing the wavy line...click view normal size...
http://community.webshots.com/photo/...45840282EJoAhz
<small>[ August 04, 2002, 01:12 PM: Message edited by: kisles2000z28 ]</small>
http://community.webshots.com/photo/...45840282EJoAhz
<small>[ August 04, 2002, 01:12 PM: Message edited by: kisles2000z28 ]</small>
Re: troubleshoot this dyno graph please... Here is a couple ideas.Could be the Fuel pressure safety switch,if you have one.HPP3 power tune will affect the power like that.
From what I see on your graph,you are running too lean on the A/F,the bouncy graph would indicate detination.Pull your plugs and see if they are still in one piece.
From what I see on your graph,you are running too lean on the A/F,the bouncy graph would indicate detination.Pull your plugs and see if they are still in one piece.
Re: troubleshoot this dyno graph please... there is no fpss...my A/F ratio is richer on nitrous as compared to 14.3 NA... I heard the nitrous go on initially, then on/off/on/off. Like pssssstttt...pst...pst...pst..pst I don't have a purge yet, so I can't rule out air in the lines...I am thinking selnoids could be fluttering...I sprayed today and it felt the best to date...nitrous flow felt constant...oh well
<small>[ August 04, 2002, 11:25 PM: Message edited by: kisles2000z28 ]</small>
<small>[ August 04, 2002, 11:25 PM: Message edited by: kisles2000z28 ]</small>
On The Tree
Joined: Jan 2002
Posts: 120
Likes: 0
From: Aloha, Oregon
Re: troubleshoot this dyno graph please... how do you have the solenoid wired? window sw? through any relays? if you literally heard the noid chattering, then that narrows it down a lot. relay chatter due to feedback from something or a bad connection or crimp somewhere. go through all your wiring and pull on all crimped connections. if you're using a cheesy 12v relay, go buy a good 20-30 amp anti-flyback auto relay at Napa. it really sounds like you have bad electrical connection. weak power (from high resistance due to bad connection) not keeping the noid open and keeps fighting the nitrous pressure. you will get an oscillation just like this. Or, it could be a bad noid. let us know what you end up finding!!
Re: troubleshoot this dyno graph please... </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by kisles2000z28:
<strong>there is no fpss...my A/F ratio is richer on nitrous as compared to 14.3 NA... I heard the nitrous go on initially, then on/off/on/off. Like pssssstttt...pst...pst...pst..pst I don't have a purge yet, so I can't rule out air in the lines...I am thinking selnoids could be fluttering...I sprayed today and it felt the best to date...nitrous flow felt constant...oh well</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">NA was 14.3-1 <img border="0" title="" alt="[Eek!]" src="gr_eek2.gif" /> A/F on the spray should be no more than 12.5-1,NA is ussauly no more than 13-1.
If you heard the noid chatter then I would double check the wiring.Make sure if you are running a window switch that the switch controls the relay ground,not the noid ground.
<strong>there is no fpss...my A/F ratio is richer on nitrous as compared to 14.3 NA... I heard the nitrous go on initially, then on/off/on/off. Like pssssstttt...pst...pst...pst..pst I don't have a purge yet, so I can't rule out air in the lines...I am thinking selnoids could be fluttering...I sprayed today and it felt the best to date...nitrous flow felt constant...oh well</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">NA was 14.3-1 <img border="0" title="" alt="[Eek!]" src="gr_eek2.gif" /> A/F on the spray should be no more than 12.5-1,NA is ussauly no more than 13-1.
If you heard the noid chatter then I would double check the wiring.Make sure if you are running a window switch that the switch controls the relay ground,not the noid ground.
TECH Enthusiast
Joined: Nov 2001
Posts: 617
Likes: 0
From: Milford, Ohio
Re: troubleshoot this dyno graph please... If you're running the HPP3 power tuning take it out - advanced timing an N2O is not a good thing. Your AFR is much too lean. If you don't have ATAP or some other monitoring tool find someone that does and log some runs to see what's not right. Your car should love N2O with the hotcam,
Trending Topics
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
Joined: Nov 2001
Posts: 1,705
Likes: 0
From: Iowa :-/~
Re: troubleshoot this dyno graph please... If you where pulling ground from anything like the window switch or solenoid that would cause the problem. If you pulled the ground for the solenoid from the window switch the window switch heats up and opens the connection until the part cools down. This would cause the system to go on and off thus causing the peaks and valleys in the Dyno.
Re: troubleshoot this dyno graph please... Sometimes, you will see wheelspin on the rollers as well. there is more to it than that, but I have seen spray graphs like that before.
