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This meter like most 2000+ meters has the sensor element and metering column modular to the body of the MAF housing.
Air Straightener from 3.3L GM car
Aluminum honeycomb. 3.025" diameter, 0.355" thickness, 0.060" honeycomb hole.
Easily harvested from the MAF which is bolted to intake right before throttle body.
The MAF can be found on 3.3L V6 GM cars from the early 90s. I found one on an Achieva, and on a Buick.
The MAF can be found on 3.3L V6 GM cars from the early 90s. I found one on an Achieva, and on a Buick.
The complete MAF:
After a bandsaw and lathe, thanks BigDogRacer!
The cut piece has and O.D. of 3.325", the I.D. is 2.938" and an effective diameter of 2.873" with snap ring installed.
I am using a 3" 45° aluminum mandrel from RacePartSolutions.com which has an O.D. of 3" and I.D. of 2.857". Weld the plate below just behind the straightener.
The tricky part is getting the sensor in the lowest flow part of the elbow. Even with the air straightner, the air coming from the intercooler is not very laminar. Early testing on the Sunbeam proved this and we are currently researching options to correct the high flow issue.
Dimensions of the plate needed to mount the MAF in a tube.
If you have Autocad, you can download the drawing
here.
NOTE: this drawing is not very accurate, double check your sensor before machining.
From left to right: 60mm, 70mm 6-wire (with flange machine off), 80mm Lightning (4-wire), 90mm Lightning (4-wire)
All of the plastic have the 4 bolt flange to bolt to a stock air filer box. MAF to TB sizes as follows:
60mm (actually measures 63mm) = 3"
70mm = 3.25"
80mm = 3.5" (tight)
90mm = 4.0"
Area of various air meters
70mm Plastic MAF is the ticket!
As I started gathering all of the plastic MAF meters, I found that the GM 3.3 air straightner is a press fit to the 70mm plastic MAF meter! It flows 14% more air than the aluminum 80mm MAF.
