Speed density or not???
Thread Starter
Pro
Joined: Aug 2008
Posts: 739
Likes: 1
From: Madison Ct.
Speed density or not???
Hey guys, with my current set up I'm running a 2 bar SD tune. I can't pass emissions in my state because of it. If 2 cars have the same HP, and 1 has a SD tune and the other doesn't, is there a major difference in performance?? Also if I go back to a MAF, is it better to get a bigger one.
D1SC Pro charger
60 lb injectors
tune,
headers/exhaust
Will I still be happy going back to a MAF
Please help!!!
Barry
D1SC Pro charger
60 lb injectors
tune,
headers/exhaust
Will I still be happy going back to a MAF
Please help!!!
Barry
Tech Contributor
Joined: Apr 2007
Posts: 10,924
Likes: 78
From: Forney Texas
What is required to pass? Not simply a "ready" status on all items??
If that's the case, then your tune just needs work to achieve that.
Are you aware you can keep the 2-bar SD tune and turn on your MAF?
If that's the case, then your tune just needs work to achieve that.
Are you aware you can keep the 2-bar SD tune and turn on your MAF?
Racer
Joined: Dec 2002
Posts: 322
Likes: 0
Hey guys, with my current set up I'm running a 2 bar SD tune. I can't pass emissions in my state because of it. If 2 cars have the same HP, and 1 has a SD tune and the other doesn't, is there a major difference in performance?? Also if I go back to a MAF, is it better to get a bigger one.
D1SC Pro charger
60 lb injectors
tune,
headers/exhaust
Will I still be happy going back to a MAF
Please help!!!
Barry
D1SC Pro charger
60 lb injectors
tune,
headers/exhaust
Will I still be happy going back to a MAF
Please help!!!
Barry
I was tuned SD before my MAF tune.
Safety Car
Joined: Mar 1999
Posts: 3,611
Likes: 182
From: Toronto, Canada
If tuned properly both should produce the same power. My local shop Champion Motors has produced over 900rwhp with a maf and our pcm's that are limited to 512g!
Melting Slicks
Joined: Apr 2003
Posts: 2,285
Likes: 16
From: Nashville TN
I agree. My car made 754 rwhp and still has the stock MAF. Been like that for over 2 years without problem. If I am running it hard I hook up the laptop and monitor the A/F with HP Tuners, but have never had the need to change it.
Advanced
Joined: Apr 2011
Posts: 69
Likes: 0
And I hear its better with a MAF. Depends on who you talk to as everyone has their own opinion. Also the way car is driven, temperatures, humidity, elevation, dew point, whether its a day that has a W in it or there is a full moon out. Oh yea if you are on your cell phone I heard SD is better but only if its as incoming call..
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Melting Slicks
Joined: Feb 2006
Posts: 2,163
Likes: 5
From: Houston
Power should be the same with either. I can do a more precise and safer tune with an SD tune. Do you want the computer to measure the boost and base fueling on it? The only way to get that with a MAF on a gen3 pcm with more than 500rwhp or so is to scale everything so the computer thinks it is seeing much less air than it really is.
I can't really see much reason to keep a MAF on these cars when boosted if your computer supports the custom OS's (99+). This is from someone who has done both and not just repeating hearsay.
I can't really see much reason to keep a MAF on these cars when boosted if your computer supports the custom OS's (99+). This is from someone who has done both and not just repeating hearsay.
Racer
Joined: Dec 2007
Posts: 407
Likes: 0
From: Jax Fl
My MAF was maxed as well, instead of "band-aiding" the tuning or going to speed density, I went with this.http://www.powrmax.com/PowrMAF%20100.html
Melting Slicks
Joined: Feb 2006
Posts: 2,163
Likes: 5
From: Houston
My MAF was maxed as well, instead of "band-aiding" the tuning or going to speed density, I went with this.http://www.powrmax.com/PowrMAF%20100.html
Racer
Joined: Dec 2007
Posts: 407
Likes: 0
From: Jax Fl
I am not a tuning expert, I just know my AFR is right at 50 degrees or 95. I'm happy with it. Besides, my factory MAF had issues anyway.
Advanced
Joined: Apr 2011
Posts: 69
Likes: 0
As long as the end results are what you want. Most people take their tuners word for everything in their tune, Everyone needs to learn how to tune or at least log their driving or WOT once in a while to check things. There is no way in he** if trust many tuners out there cause ive seen too many tunes where they dont even touch half the tables they should be for $600..
Racer
Joined: Dec 2002
Posts: 322
Likes: 0
And I hear its better with a MAF. Depends on who you talk to as everyone has their own opinion. Also the way car is driven, temperatures, humidity, elevation, dew point, whether its a day that has a W in it or there is a full moon out. Oh yea if you are on your cell phone I heard SD is better but only if its as incoming call..
