Just a quick question. My buddy has a 2001 Chevy with the 5.3. He descreened his MAS and said it hurt his gas mileage.So he gave it to me. The numbersmach my MAS so that is not a problem. Before I install it I was wondering if it will hurt my gas mileage, increase it, or just make it more responsive? I wonder if it was his driving, but he had it descreened for about 2 months and said itcut hismiles per tank roughly 30 miles shorter of what he normally gets. Any thoughts would be appreciated. I would hate to loose MPG especailly at this time of the gas inflation....

 

I am totally against descreened MAF's.

 

Why are you against descreened MAFs?

 

Well I hate to bring up an old argument lets just say we have talked about it allot. I say its a waist and there is no gains. Some say they got more throttle response. But I say to that its not worth the risk of detonation. Thats one of the things that can go wrong and you wont even know until its to late. Some people will say they have had it done for a while and have had no problems. The thing about that is they dont know if the are having problems. Unless they are using a wide band. If you ask me Id say why risk it for throttle response that not everybody has gotten from this mod. Just think the guy gave it to you said he lost MPG's.

 

I know this is going to sound like a dumb question, but a question not asked is more stupid than adumb question that is asked... meaning if I do not ask it then I know some one else is wondering about the same thing, but is too chickem@#$! to ask...lol So here it goes. What do you mean by "running a wideband?"

 

A wide band is a badass gauge that tells you just about everything check it out!!

 

I have to agree with rxsteven here, descreening the MAFS canreduce efficientcy and decrese idle smoothness. However, if you buy a granatelli or similar screenlessMAFS,it it adjustedso as not to cause problems.

 

A wideband is similar to your O2 sensors (looks just like one). It gives a very precise reading of your A/F ratio which enables more precise tuning.