I was at my brothers work on Monday and we were doing some work on my XLT. My brother has always loved cars and working on them, specifically tuning them to run a good as possible.

His boss has a friend who just got an older (i guess late 80's early 90's) cobra engine built from Ben Pilla (sp?) Performance. Since everything else on the car was stock except the engine, my brother recommended some upgrades. One of the upgrades that my brother got for him was an larger MAF. One of the people from Pilla told him to rotate the MAF once it is installed and that will change the way the engine runs.

When I first head this I was like :bsflag: but after he put it on and the car was idleing a bit rough, he rotated it (while the engine was running) and sure as **** the engine was running smoother.

Has anyone heard of this before? I never read anything about that here but maybe since the L's use forced induction it makes no difference? :dunno: or maybe there is a hundreth or two to be had by rotating your MAF

The other option is that I am knucklehead when it comes to these things :o

 

Guys with '03 Cobras are doing the same thing to correct issues when they put on a cold air kit. Since the flow of air through the sensor is not perfectly uniform, by rotating the MAF you are putting the element in a spot where it is getting a reading that better represents the amount of air actually entering the motor. Errr something like that...

Jim

 

Its also a quick and good way to blow your truck up too. If you need to do any rotation for your maf because of a CAI, then dont bother with the kit. I hope you got a wideband 02 sensor if you plan to rotate it. A little as 30 degrees can lean you out over 2 full points.

 

How do you know this?? Just curious........not saying it's not true.

--Joe

 

Doesn't JDM recommend rotating the MAF so that the sensor in the MAF sits vertical?

 

What is a CAI? (Cold Air Intake I am guessing) This MAF connects to a short tube that then goes a K&N which sits under the hood. Not something I would consider cold air....

 

the term "cold air" is used too much around here, the only actual cold air systems take air from the outside through the hood/fender/or under the front piece or grills.

 

In this picture, it looks as though you rotate the MAF for the Volant intake. This is not my engine, just a picture I found.

 

That sounds like BS to me.

 

the MAF is normally in that position pictured above. The sensor is always pointing down into the tube. The Volant does not allow for rotation other than a 180 degrees just like the stock air box...but there is no point in doing that since the sensor will still be in the direct center...it IS a circle after all. It might look cleaner as far as looks go though since the wires would be more hidden...but its pointless overall IMO

 

On my Lightning I had the maf rotated 90 degrees like on the Volant intake pic. Never had a problem and my truck was data logged several times, a/f was @ 11.6-11.8 and fuel trims were right on.

I run a power pipe on my Harley and the maf is on the underside of the pipe. The fuel trims were off on this thing to the point that it almost set off a check engine light, JDM tuned the truck and corrected for the larger pipe and everything is a-ok right now.

I don't think it's so much the rotation of the maf that will give you problems but it's the location of the maf.

 

I think you're talking about the IAT sensor....the little wire "loop."

 

JDM rotates the maf 90 degrees on all of the filter kit installs I've seen them do.

 

Nope, I meant the MAF itself.

All of the JDM intake kits that I have seen have the MAF rotated 90 degrees.

 

Rob, did the power pipe lean out the fuel trims too much? Just curious, because I have one sitting on my bench at home and want to know what to look out for once I put it on.