NefMoto

General => General Discussion => Topic started by: Integrated_20 on January 02, 2020, 09:48:51 PM



Title: Throttle cut at dragstrip?
Post by: Integrated_20 on January 02, 2020, 09:48:51 PM
Question for any experts out there. I was at the teack today and my car would cutout after first gear if i went wot too fast. Anyone know what would cause that. 1st time it happened shifting into 4th gear. The 2nd gear next run. It was weird because thats?never happened before.
By the way the launch in my s4 is better then my evoX launch. Very impressed


Title: Re: Throttle cut at dragstrip?
Post by: aef on January 02, 2020, 11:08:01 PM
Its because of the front radar in the bumper.
It knows where the car is and dragracing is not part of your insurance.

1. post logs
2. what car/engine
3. post logs


Title: Re: Throttle cut at dragstrip?
Post by: Integrated_20 on January 06, 2020, 02:53:19 AM
Its not letting me upload my .csv files from the track?

2000 b5 s4 with k04s on e85


Title: Re: Throttle cut at dragstrip?
Post by: Integrated_20 on January 06, 2020, 03:02:44 AM
here one of the logs from the track. Had to put it in a zip file to upload it


Title: Re: Throttle cut at dragstrip?
Post by: nyet on January 06, 2020, 10:06:06 AM
That is awful.

I don't see any throttle cut, but there is something very wrong with your car.

Have you even looked at your lde and WGDC? You are significantly underboosting.

Please run a WOT log from 2500 rpm to redline. One gear. Preferably 3rd. 2nd will do in a pinch if you don't have space.


Title: Re: Throttle cut at dragstrip?
Post by: IamwhoIam on January 06, 2020, 01:29:16 PM
WTF is lamsbg_w doing at 0.45 or wherever it is? and why are you logging lamsbg_w instead of lamsons_w, which is the real request? that's got to be some of the crappiest logs I've ever looked at.


Title: Re: Throttle cut at dragstrip?
Post by: Integrated_20 on January 07, 2020, 01:14:33 AM
It does look pretty shitty lol. But being that I was at the dragstip and launching from 5k with 2step enabled ..somewhat keeps me from being able to do a nice clean log starting at 2k up to 7k wot runs. Going back to why I posted this thread partially plays into the log looking the way it does. Problem #2 I think something is wrong with my 3bar map sensor. its been saying I'm only hitting a max load of around 160 but in reality my load is somewhere between 225-230. How do I know this? well my fats times are still hitting 3.1 3.2 seconds which are the same as before my map sensor blew the top piece  off and load was at 225. which in theory tells me they must be close to the same to prior this 160 actual load BS.
when I firrst looked at this log I also said wtf am I looking at here so I understand the disgust.  luckily though I found myself reading a old post that led me to the solution to fix this problem.  http://nefariousmotorsports.com/forum/index.php?topic=151.0

problem solved


Title: Re: Throttle cut at dragstrip?
Post by: nyet on January 07, 2020, 10:40:08 AM
Pressure sensor data is not used to calculate load.


Title: Re: Throttle cut at dragstrip?
Post by: Integrated_20 on January 15, 2020, 03:43:29 AM
Pressure sensor data is not used to calculate load.
I thought its caculated via map & maf on audis


Title: Re: Throttle cut at dragstrip?
Post by: nyet on January 15, 2020, 11:55:55 AM
I thought its caculated via map & maf on audis

You are conflating two different pressure variables:

pvdkds_w comes direct from the sensor

ps_w comes from MAF/RPM (load)


Title: Re: Throttle cut at dragstrip?
Post by: Integrated_20 on January 15, 2020, 05:56:11 PM
So if my load is way off what do i need to rectify to get back on track?


Title: Re: Throttle cut at dragstrip?
Post by: nyet on January 15, 2020, 05:57:42 PM
So if my load is way off what do i need to rectify to get back on track?

Your load being way of is quite literally the least of your problems.

http://nefariousmotorsports.com/forum/index.php?topic=17192.msg132483#msg132483

but if you have LC it means you are running somebody else's tune, doubtless a tune you can't modify.

So I'm not sure what you are looking for here.


Title: Re: Throttle cut at dragstrip?
Post by: IamwhoIam on January 16, 2020, 05:26:39 AM
Pressure sensor data is not used to calculate load.

Actually this statement isn't 100% correct, albeit I used to think the exact same. pspvdk(_w) does come into play in EGFE, BGMSZS. BGRLP and MSDK, and IF the pvd sensor isn't calibrated correctly, it can and will lead to weird adverse effects regarding load and fueling.


Title: Re: Throttle cut at dragstrip?
Post by: nyet on January 16, 2020, 11:44:24 AM
Actually this statement isn't 100% correct, albeit I used to think the exact same. pspvdk(_w) does come into play in EGFE, BGMSZS. BGRLP and MSDK, and IF the pvd sensor isn't calibrated correctly, it can and will lead to weird adverse effects regarding load and fueling.

Interesting, I will take a look. Thanks!


Title: Re: Throttle cut at dragstrip?
Post by: prj on January 17, 2020, 02:33:19 AM
Primary load is MAF only, HOWEVER.

There is primary load to secondary load correction.
fkmsdk and friends.
And if the max/min factor is not 1.0, then it will correct the primary airflow with secondary airflow.

I don't think this actually affects fueling, but it affects throttle control and a lot of other things.


Title: Re: Throttle cut at dragstrip?
Post by: Integrated_20 on January 20, 2020, 09:08:05 PM
Your load being way of is quite literally the least of your problems.

http://nefariousmotorsports.com/forum/index.php?topic=17192.msg132483#msg132483

but if you have LC it means you are running somebody else's tune, doubtless a tune you can't modify.

So I'm not sure what you are looking for here.

Def not running someone elses tune. I modified my rom image via the nef LC page for instructions


Title: Re: Throttle cut at dragstrip?
Post by: nyet on January 21, 2020, 09:03:23 AM
Def not running someone elses tune. I modified my rom image via the nef LC page for instructions

Ditch LC unless you know what each change does.


Title: Re: Throttle cut at dragstrip?
Post by: Integrated_20 on February 15, 2020, 10:52:42 PM
Actually this statement isn't 100% correct, albeit I used to think the exact same. pspvdk(_w) does come into play in EGFE, BGMSZS. BGRLP and MSDK, and IF the pvd sensor isn't calibrated correctly, it can and will lead to weird adverse effects regarding load and fueling.


thank you. of course the map sensor is partially used to calculate load. Map + MAf. hence why with the 2.5 bar sensor you can run more then 23psi. b5 s4s dont even use psi based boost control. its all load based upgrade your map sensor and you can reach higher loads/psi/mbar whatever you want to call it


Title: Re: Throttle cut at dragstrip?
Post by: Integrated_20 on February 15, 2020, 11:06:24 PM
Ditch LC unless you know what each change does.

not trying to be rude and yes I know you're the mod so I dont make you upset and to get myself flamed. But I happen to know quite a bit more then you'd think. I've been tuning professionally for over 9yrs now and still consider  myself as a student of the game. Always  learning new things. constantly studying new info. I just dont pipe up on here often  and add my two cents because I'm new to this site and dont really feel the need to for the most part


Title: Re: Throttle cut at dragstrip?
Post by: IamwhoIam on February 16, 2020, 10:27:43 AM

thank you. of course the map sensor is partially used to calculate load. Map + MAf. hence why with the 2.5 bar sensor you can run more then 23psi. b5 s4s dont even use psi based boost control. its all load based upgrade your map sensor and you can reach higher loads/psi/mbar whatever you want to call it

I think posting shouldn't be allowed after consuming liberal amounts of alcohol. your gibberish above makes my brain hurt. you don't understand anything and you've been tuning professionally? Jeeeeeeez Louise! nye's advice isn't to be taken lightly, you sound like you don't even understand what you're replying to.


Title: Re: Throttle cut at dragstrip?
Post by: Integrated_20 on March 01, 2020, 12:27:44 AM
I think posting shouldn't be allowed after consuming liberal amounts of alcohol. your gibberish above makes my brain hurt. you don't understand anything and you've been tuning professionally? Jeeeeeeez Louise! nye's advice isn't to be taken lightly, you sound like you don't even understand what you're replying to.


You know what, Ill refrain from responding except to say ( I know less then you will ever know) everyone just have a great day