Changing the engine's sweet spot (or flat spot)
Changing the engine's sweet spot (or flat spot)
I didn't know what to title my post, so hopefully my explanation will ring a bell with those who experience the same thing.
Basically, between 1,600 and 2,900, the response is rather flat as compared to before and after that range. As many of you probably know, things start getting serious at 3k and above.
Now, when the engine is "cold," the flat spot is not there...maybe because the engine is running rich, the 02 sensors are offline, etc.?
My question is, "Have you solved this quirk, and how did you do it?"
Please, keep it in the realm of the same equipment I have (I'm not looking to do a 3.5 swap, or a 5-sp conversion, add a turbo, custom ECU, etc..)
Basically, between 1,600 and 2,900, the response is rather flat as compared to before and after that range. As many of you probably know, things start getting serious at 3k and above.
Now, when the engine is "cold," the flat spot is not there...maybe because the engine is running rich, the 02 sensors are offline, etc.?
My question is, "Have you solved this quirk, and how did you do it?"
Please, keep it in the realm of the same equipment I have (I'm not looking to do a 3.5 swap, or a 5-sp conversion, add a turbo, custom ECU, etc..)
Your sig says you have a modded stock intake with electric supercharger
, I would say that is your problem right there. That thing probably chokes at the rpms stated or at leasts puts a load on your alternator at those rpms to where it feels sluggish. Remove that and see if there is any difference.
, I would say that is your problem right there. That thing probably chokes at the rpms stated or at leasts puts a load on your alternator at those rpms to where it feels sluggish. Remove that and see if there is any difference.
Your sig says you have a modded stock intake with electric supercharger , I would say that is your problem right there. That thing probably chokes at the rpms stated or at leasts puts a load on your alternator at those rpms to where it feels sluggish. Remove that and see if there is any difference.
, I would say that is your problem right there. That thing probably chokes at the rpms stated or at leasts puts a load on your alternator at those rpms to where it feels sluggish. Remove that and see if there is any difference.http://forums.maxima.org/4th-generat...out-tires.html
http://forums.maxima.org/4th-generat...-made-mod.html
http://forums.maxima.org/4th-generat...-gas-tank.html
...etc.
I didn't know what to title my post, so hopefully my explanation will ring a bell with those who experience the same thing.
Basically, between 1,600 and 2,900, the response is rather flat as compared to before and after that range. As many of you probably know, things start getting serious at 3k and above.
Now, when the engine is "cold," the flat spot is not there...maybe because the engine is running rich, the 02 sensors are offline, etc.?
My question is, "Have you solved this quirk, and how did you do it?"
Please, keep it in the realm of the same equipment I have (I'm not looking to do a 3.5 swap, or a 5-sp conversion, add a turbo, custom ECU, etc..)
Basically, between 1,600 and 2,900, the response is rather flat as compared to before and after that range. As many of you probably know, things start getting serious at 3k and above.
Now, when the engine is "cold," the flat spot is not there...maybe because the engine is running rich, the 02 sensors are offline, etc.?
My question is, "Have you solved this quirk, and how did you do it?"
Please, keep it in the realm of the same equipment I have (I'm not looking to do a 3.5 swap, or a 5-sp conversion, add a turbo, custom ECU, etc..)
If you think it's because it's running rich, then turn up your fuel pressure. See what happens.
What type of gas are you using, what is the condition of your knock sensor, and how are your sparkplugs? These could all be factors that could lead to the ignition timing being retarded by the ECU when the car is hot, thus making this noticeable "flat spot" that is non-existent when cold.
Also, under 3K RPM the IACV has an influence. Make sure the innards of your IACV are completely clean as well as the throttle body.
Also if I were you I would ditch the "electric supercharger." Not even a gas powered leaf blower can keep up with the airflow the VQ needs.
Also, under 3K RPM the IACV has an influence. Make sure the innards of your IACV are completely clean as well as the throttle body.
Also if I were you I would ditch the "electric supercharger." Not even a gas powered leaf blower can keep up with the airflow the VQ needs.
problem solved next thread please
Your sig says you have a modded stock intake with electric supercharger , I would say that is your problem right there. That thing probably chokes at the rpms stated or at leasts puts a load on your alternator at those rpms to where it feels sluggish. Remove that and see if there is any difference.
, I would say that is your problem right there. That thing probably chokes at the rpms stated or at leasts puts a load on your alternator at those rpms to where it feels sluggish. Remove that and see if there is any difference.lol just read the links, those cpu fans really work.............in my computer tower
Thread
Thread Starter
Forum
Replies
Last Post
kjlouis
4th Generation Maxima (1995-1999)
12
Oct 3, 2015 05:29 AM
sdotcarter
6th Generation Maxima (2004-2008)
2
Sep 2, 2015 09:53 PM