Does DETONATING always happen or it shouldnt at all
Originally Posted by westpak
Actually he says he hears it.
RED, what do you mean you always hear it. If you are talking about the valvetrain noise that's not detonation. The cool thing about the tuner is you can output it to your laptop mic input and record it.
I bet you are hearing the moving parts in your engines valvetrain. When I get into work monday i'll post some audible wav's of detonation.
Thanks,
Jermaine~
Last edited by BlackTuner; Jan 8, 2006 at 10:56 AM.
exactly
BTW to clarify my earlier post...you should have no knock that induces timing to be pulled
remember, the knock sensor is just a microphone (piezzo type). It picks up noise un a range of frequencies. IMHO, the headphones are useless without a log to refer to coupled with a set of ears that can discern what knock really is. The log will tell you exactly what is happening when, and what else is going on when and if a knock event happens. The log coupled with the headphones is the absolutely pinnacle in terms of telling you what is happening
BTW to clarify my earlier post...you should have no knock that induces timing to be pulled
remember, the knock sensor is just a microphone (piezzo type). It picks up noise un a range of frequencies. IMHO, the headphones are useless without a log to refer to coupled with a set of ears that can discern what knock really is. The log will tell you exactly what is happening when, and what else is going on when and if a knock event happens. The log coupled with the headphones is the absolutely pinnacle in terms of telling you what is happening
Last edited by Z1 Performance; Jan 8, 2006 at 10:46 AM.
Can you describe exactly what you are hearing, at at what RPM ranges this sound is occuring?
All engines are right on the verge of knocking, and some of them even experience some harmless knock that causes no damage, or power loss, and is present in many engines. It would be nice if detonation was like a light switch....its either there or its not...but in practice, there is a grey area where some mild inaudible knock is present, and its perfect safe.
Unless we are sitting there listening, we can only speculate on what you are hearing.
All engines are right on the verge of knocking, and some of them even experience some harmless knock that causes no damage, or power loss, and is present in many engines. It would be nice if detonation was like a light switch....its either there or its not...but in practice, there is a grey area where some mild inaudible knock is present, and its perfect safe.
Unless we are sitting there listening, we can only speculate on what you are hearing.
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Originally Posted by RED HOT Z
I am not using my stock knock sensor my Tuner Pro came with a knock sensor that reads way past the 5200rpm that the stock one reads.
Where did you ( they ) position the Tuner Pro sensor ?
The OE sensor is bolted to a boss cast into the center of the V of the block & there is no room around this area to position another one.
When installing my Tuner Pro sensor I drilled & tapped a hole in the back of the block, near where the engine # is stamped.
Probably not the ideal place, but the only place with a flat surface in the center of the block.
When I log the motor I can sometimes get a knock count but I can't hear it in the earphones. Just general engine noise.
As Z1 has pointed out, with the Tuner Pro softwear your laptop will show the knock count live, Listen with the phones & see if the noise you hear as detonation is confirmed on the laptop
Last edited by Nathan; Jan 8, 2006 at 12:26 PM.
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Originally Posted by westpak
At what RPM's is it knocking? The dangerous areas are load areas around 3500-5000, if you are hearing knock past that it is probably engine noise. Also when tuning it on the dyno you will hear less noise since you remove road noise up front specially.
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Originally Posted by Z1 Performance
there should be 0 knock whatsoever.
Do you have a log of the UTEC you can post? Knock is one of things that can be logged. You can also adjust the sensitivity of the knock sensor, as well as how much timing it yanks out when knock is detected. As for the whole "Nissan knock sensors are too sensitive" - honestly miaplaya - they say that about EVERY car. Id rather it too be sensitive than not enough.
Do you have a log of the UTEC you can post? Knock is one of things that can be logged. You can also adjust the sensitivity of the knock sensor, as well as how much timing it yanks out when knock is detected. As for the whole "Nissan knock sensors are too sensitive" - honestly miaplaya - they say that about EVERY car. Id rather it too be sensitive than not enough.
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At idle i hear a sound kind of like static and as I get on it the static gets louder once passing 3500 rpms at WOT I hear cracking noises kind of crackling. I was asking if the tuner pro reads even the most minimal knock which is harmless or is this something I should be worried about. Befrore the tune I had detonation and could be heard just by driving. I cant hear it now only with the headphones.
The TXS instructions outlines this in detail, so instead of explaining it, just take a look here: http://www.turboxs.com/utec350zupdate.htm
The UTEC has knock sensitivity control, so depending on how its set, it might pick up things other than true audible knock.
Once you are connected, select the data logger and you can monitor and record it there. I usually capture it, and look at the txt file, but others might do it a little differently.
All we can offer are some remote opinions, but I dont think anyone can second guess your tuner. I am sure your motor is safe, based on GT Motorsports good track record with the Z's.
The UTEC has knock sensitivity control, so depending on how its set, it might pick up things other than true audible knock.
Once you are connected, select the data logger and you can monitor and record it there. I usually capture it, and look at the txt file, but others might do it a little differently.
All we can offer are some remote opinions, but I dont think anyone can second guess your tuner. I am sure your motor is safe, based on GT Motorsports good track record with the Z's.
Last edited by Sharif@Forged; Jan 8, 2006 at 03:40 PM.
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Red Your Car Is Not Detonating I'm Very Certain . Couple Points I Want To Make
1-its Impossible For Someone That Had Never Used Knock Hearing Devise Like Turboxs Pro Tuner ,or Hks Knock Amp To Put A Set Headphones On And Be Able To Distinguish Between Engine Detonation And Normal Engine Noise ,it Takes A Little More Experience Than That .
2- Your Car Has Uncontrollable Boost 12 To 12.8 Psi Sometimes ,that Is Bad And If It Continuous To Happen, Your Car Will Detonate And Eventually Have A Bigger Problem (blown Engine) So We Need To Fix The Boost Problem Immediately .and I Would Not Even Push The Car Just Yet .
3- The Only Way To Really Know Like Many People Stated Her .is To Pull The Laptop And Data Log And See ,if The Utec Is Pulling Timing .it Is Very Straight Forward No Guess Work And Stipulations.utec Not Pulling Timing Good .utec Pulling Timing Then We Have A Problem
Hopefully This Will Clear Things Up For You And I Hope I'm Not Being Too Blunt .and If You Have And Doughts Just Stop By The Shop ,i Can Go On A Test Drive With You And I Can Do Some Data Loging To Confirm
Sam
1-its Impossible For Someone That Had Never Used Knock Hearing Devise Like Turboxs Pro Tuner ,or Hks Knock Amp To Put A Set Headphones On And Be Able To Distinguish Between Engine Detonation And Normal Engine Noise ,it Takes A Little More Experience Than That .
2- Your Car Has Uncontrollable Boost 12 To 12.8 Psi Sometimes ,that Is Bad And If It Continuous To Happen, Your Car Will Detonate And Eventually Have A Bigger Problem (blown Engine) So We Need To Fix The Boost Problem Immediately .and I Would Not Even Push The Car Just Yet .
3- The Only Way To Really Know Like Many People Stated Her .is To Pull The Laptop And Data Log And See ,if The Utec Is Pulling Timing .it Is Very Straight Forward No Guess Work And Stipulations.utec Not Pulling Timing Good .utec Pulling Timing Then We Have A Problem
Hopefully This Will Clear Things Up For You And I Hope I'm Not Being Too Blunt .and If You Have And Doughts Just Stop By The Shop ,i Can Go On A Test Drive With You And I Can Do Some Data Loging To Confirm
Sam
Last edited by Goerge@GTMotors; Jan 8, 2006 at 07:40 PM.
Originally Posted by MIAPLAYA
Your knock sensor could be picking up random engine noise as knock. Nissan knock sensors are known to be overly sensitive..
only to 5200 rpm after that USELESS
Last edited by nissansource; Jan 9, 2006 at 08:42 AM.
RED HOTZ bring the car over plug in my laptop and lets rock it out. put some fuel in it also vp109 unleaded and go test and see if the nock is detected on the laptop and see if it goes away with fuel
Last edited by nissansource; Jan 9, 2006 at 08:42 AM.
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well there it is SAM my tuner responded to my thread and my car is actually at the shop and he confirmed there is no detonation. He said he set the knock sensor at the highest sensitivity level and I might be picking up some very harmless knock.
Originally Posted by Nathan
RED HOT Z
Where did you ( they ) position the Tuner Pro sensor ?
The OE sensor is bolted to a boss cast into the center of the V of the block & there is no room around this area to position another one.
When installing my Tuner Pro sensor I drilled & tapped a hole in the back of the block, near where the engine # is stamped.
Probably not the ideal place, but the only place with a flat surface in the center of the block.
When I log the motor I can sometimes get a knock count but I can't hear it in the earphones. Just general engine noise.
As Z1 has pointed out, with the Tuner Pro softwear your laptop will show the knock count live, Listen with the phones & see if the noise you hear as detonation is confirmed on the laptop
Where did you ( they ) position the Tuner Pro sensor ?
The OE sensor is bolted to a boss cast into the center of the V of the block & there is no room around this area to position another one.
When installing my Tuner Pro sensor I drilled & tapped a hole in the back of the block, near where the engine # is stamped.
Probably not the ideal place, but the only place with a flat surface in the center of the block.
When I log the motor I can sometimes get a knock count but I can't hear it in the earphones. Just general engine noise.
As Z1 has pointed out, with the Tuner Pro softwear your laptop will show the knock count live, Listen with the phones & see if the noise you hear as detonation is confirmed on the laptop
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He checked the datalogger and nowhere was timing pulled I guess since its at the highest sensitivity it could be picking up some very mild detonation that is completely harmless. Detonation that could be happening to your guys cars and you dont even know because you cant hear it without the headphones.
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