Slower acceleration after cleaning MAF and changing the air filters

BigT · 03-12-2012, 12:29 PM

Do another run with the oil temps hovering just below the 180 degree mark and report back.

edub370 · 03-12-2012, 12:30 PM

If u could somehow edit the vids into 1 vid that would play the 2 side-by-side it would be easier to see what the differences could be. since u said u are using the paddles, the difference could be something as simple as shift points

gaveup · 03-12-2012, 01:26 PM

Quote:

Originally Posted by Kaiser370z

i used contact cleaner to clean them
...........
how did i measure these times ??
very simple . i recorded a video for my acceleration and import it in a video editor
take the starting time and finishing time and do a simple math with them ^_^

Uhm, not for anything, but this has to be the absolute worst possible way to measure any sort of acceleration. When you're dealing with just mere seconds, there are far too many factors that would go into the recording alone that would mess these numbers up. This is one of those times where even a garbage gtec would be a better way to guess acceleration times...

Like, how are you measuring the start and finish of each run? Are you basing it off a speedo or what? Most speedometers are not accurate 100% of the time the higher up you go. Unless you have a 1/4 mile perfectly measured out and have a sure fire 100% method of measuring the time, you're numbers will always vary.

Cmike2780 · 03-12-2012, 01:53 PM

Quote:

Originally Posted by gaveup

Uhm, not for anything, but this has to be the absolute worst possible way to measure any sort of acceleration. When you're dealing with just mere seconds, there are far too many factors that would go into the recording alone that would mess these numbers up. This is one of those times where even a garbage gtec would be a better way to guess acceleration times...

Like, how are you measuring the start and finish of each run? Are you basing it off a speedo or what? Most speedometers are not accurate 100% of the time the higher up you go. Unless you have a 1/4 mile perfectly measured out and have a sure fire 100% method of measuring the time, you're numbers will always vary.

Now that you mention it, I think you're right. I was assuming he was using cameras outside the car with marked reference points, kind of like they do on Mythbusters. If he's just pointing a camera at the speedo, it's not going to be all that accurate. Heck, downloading that app for your iPhone would be more accurate.

TerribleONE · 03-12-2012, 01:57 PM

this is why I asked!

BigT · 03-12-2012, 01:58 PM

Also, recorded runs should be done on the same stretch of road so there isn't too much of a variance between going up or down hill.

mantella87 · 03-12-2012, 02:32 PM

I think it's all in your head bro.

Skull Crusher · 03-12-2012, 04:09 PM

Way to many variables to consideration and give an accurate answer. Unless you damaged the MAF in some way. Other than this, it can boggle the mind.

Cmike2780 · 03-12-2012, 04:13 PM

I also have a feeling the ECU reset had something to do with it. I think the ECU needs to re-learn everything before you get it running back to normal. Drive it around for a day or so and then run the "test" again.

Red__Zed · 03-12-2012, 04:33 PM

While his speedo cam test may not be accurate, it should be sufficiently precise. Plenty of precision to note a delta t.

03-12-2012, 12:30 PM	#17 (permalink)
edub370 A True Z Fanatic Join Date: May 2011 Location: KCMO Posts: 3,458 Drives: 09 370z S/T 6MT Rep Power: 20	If u could somehow edit the vids into 1 vid that would play the 2 side-by-side it would be easier to see what the differences could be. since u said u are using the paddles, the difference could be something as simple as shift points __________________ 09 370Z ST 6MT//Injen CAI//Greddy CBE//TP//TSW's//Swifts//Stillen lip//Whiteline sways 326whp/268tq

03-12-2012, 01:57 PM	#20 (permalink)
TerribleONE A True Z Fanatic Join Date: Jan 2009 Location: Socal Posts: 10,203 Drives: WOT Rep Power: 5850	this is why I asked! __________________ 638WHP 541WTQ @ 13.5PSI Build thread

03-12-2012, 04:13 PM	#24 (permalink)
Cmike2780 A True Z Fanatic Join Date: Jun 2010 Location: Long Island Posts: 5,059 Drives: slowwww Rep Power: 29	I also have a feeling the ECU reset had something to do with it. I think the ECU needs to re-learn everything before you get it running back to normal. Drive it around for a day or so and then run the "test" again. __________________ [09][MB][6-Spd MT][Touring][Stillen Gen III][K&N][Borla CBE][Evo-R] [ArchitTEK Photography]

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03-12-2012, 12:29 PM	#16 (permalink)
BigT Enthusiast Member Join Date: Jan 2012 Location: NJ Posts: 469 Drives: 98 2g DSM Rep Power: 13	Do another run with the oil temps hovering just below the 180 degree mark and report back.

03-12-2012, 01:58 PM	#21 (permalink)
BigT Enthusiast Member Join Date: Jan 2012 Location: NJ Posts: 469 Drives: 98 2g DSM Rep Power: 13	Also, recorded runs should be done on the same stretch of road so there isn't too much of a variance between going up or down hill.

03-12-2012, 02:32 PM	#22 (permalink)
mantella87 Track Member Join Date: Jun 2011 Location: Sacramento, CA Posts: 590 Drives: 2011 Z34 MT Rep Power: 15	I think it's all in your head bro.

03-12-2012, 04:09 PM	#23 (permalink)
Skull Crusher Base Member Join Date: Dec 2011 Location: NM Posts: 69 Drives: 2011 370Z Nismo 0478 Rep Power: 13	Way to many variables to consideration and give an accurate answer. Unless you damaged the MAF in some way. Other than this, it can boggle the mind.

03-12-2012, 04:33 PM	#25 (permalink)
Red__Zed A True Z Fanatic Join Date: Jul 2010 Location: window seat Posts: 28,940 Drives: Mostly on two wheels Rep Power: 120	While his speedo cam test may not be accurate, it should be sufficiently precise. Plenty of precision to note a delta t.