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turbo... MAF or speed density?

Old Aug 23, 2009 | 01:54 AM
  #21  
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Originally Posted by Wilde Racing
And you are tuning blind once you max the maf...


2 bar sensors from your local dealership.

GM P/N: 12580698 AC Delco: 213-1631
not to thread jack but man, this guy starts hocking his GIGANTIC turbo and parts and trying to off the truck and now he's ALL about bikes... check the sig, sportin a nice little Duc L-Twin

ya know its possible to afford both right?
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Old Aug 23, 2009 | 02:30 AM
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Originally Posted by Wilde Racing
And you are tuning blind once you max the maf...


2 bar sensors from your local dealership.

GM P/N: 12580698 AC Delco: 213-1631
That must be why I can't make enough power to burn up my #7 piston.
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Old Aug 23, 2009 | 07:13 AM
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stock48 Do you adjust your PE mode once you max your MAF?

That is how mine is set up.
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Old Aug 23, 2009 | 09:08 AM
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Originally Posted by Stoichiometric
I look at the MAF like a failsafe for blow through forced induction. Once you obtain a reasonable amount of boost it conveniently separates to prevent engine damage.

yep, quite a feat for the gm engineering team...


Originally Posted by 00Silv4.8
not to thread jack but man, this guy starts hocking his GIGANTIC turbo and parts and trying to off the truck and now he's ALL about bikes... check the sig, sportin a nice little Duc L-Twin

ya know its possible to afford both right?
Afford, my truck, a new crew cab, bike, and have money left for restoring the charger? I dont think so.... It's going to be tight even with selling my truck. Plus I want to have the first LS powerd mopar s475 charger (with a five inch down pipe)

Originally Posted by stock48
That must be why I can't make enough power to burn up my #7 piston.
No the fuel in the wet shot helps keep all the cylinders burning equal...
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Old Aug 24, 2009 | 03:11 PM
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Originally Posted by sharpshooter
stock48 Do you adjust your PE mode once you max your MAF?

That is how mine is set up.
I use the last line in the PE, then use the RPM vs fuel multiplyer. I like it because it's set values, and Really easy to tune but you have to stay on top of it. Any drastic change of elevation, or temp will throw the AFR way off.

Originally Posted by Wilde Racing
yep, quite a feat for the gm engineering team...




Afford, my truck, a new crew cab, bike, and have money left for restoring the charger? I dont think so.... It's going to be tight even with selling my truck. Plus I want to have the first LS powerd mopar s475 charger (with a five inch down pipe)



No the fuel in the wet shot helps keep all the cylinders burning equal...
Maybe if the new T78 doesn't do the trick I will take your advise..... How much do you want for that kit anyway?:nunchuk1:
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Old Aug 24, 2009 | 05:29 PM
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Originally Posted by stock48
I use the last line in the PE, snip snip
Do you mean the last line in the VE Table...
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Old Aug 25, 2009 | 01:38 AM
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Originally Posted by Mort
Do you mean the last line in the VE Table...
Yes sorry the VE table. My fuel system is maxed out, and I haven't messed with the fuel curve for a while. My low, and high boost tune is the same just high boost runs meth. All I have done lately is turn the boost down 2PSI and pull 4* of timing, when I got to Ca.
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Old Aug 25, 2009 | 12:22 PM
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Real benefits of the maf is if you are going to be changing temperatures and altitude. When the maf fails out at whatever level of airflow it fails at.. whatever the current tune is.. it can go into SD and make up for the flow. There are ways to make the maf work. I am definitely not sold on a 2 bar or 3 bar tune if you ever leave your happy place.. meaning if you start driving around at different temperatures and altitudes you will run into some issues with the truck going rich or lean depending on the DA. I know alot of guy's here hate the Maf but I know with most driving when you are not in boost it is a huge driveabilty increase to have the maf there when you need it. It can be made to work to your favor it just takes more time on the tuning end of things. While 2 bar tuning is "simpler" making it act more like a stock vehicle at all altitudes and all temperature conditions is a much bigger challenge without the maf.
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Old Aug 25, 2009 | 12:27 PM
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ive been OLSD for over a year and a half. Ive moved twice, 120miles north, and then moved around 120miles east. Ive never touched my VE except when I added meth.
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Old Aug 25, 2009 | 12:32 PM
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Originally Posted by charcold-bowtie
ive been OLSD for over a year and a half. Ive moved twice, 120miles north, and then moved around 120miles east. Ive never touched my VE except when I added meth.

Has your elevation changed?

Your in the Midwest/south.. it's not as eratic as the west coast.

I would love to see if your afr's changed when you moved around
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