What's better than JB-weld?
11-17-2005, 03:55 PM
#43
Senior Member
Join Date: May 2002
Location: California
Posts: 22,465
Originally Posted by heretic' post='778989' date='Nov 16 2005, 04:30 PM
I don't have a MAF in particular picked out yet. The design phase has stalled in the phase where I find a suitable MAF unit.
suitable meaning what?
i think ive got an mpv one we changed that didnt fix the car, its the 3.0 duratech one, 3" in and out
11-17-2005, 04:47 PM
#44
Senior Member
Join Date: Dec 2003
Posts: 162
Suitable meaning one that Calibration data is available for.
Lemmie check on www.msefi.com to see which MAFs are supported in the newer code bases.
Lemmie check on www.msefi.com to see which MAFs are supported in the newer code bases.
11-28-2005, 11:55 AM
#45
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Thread Starter
Join Date: Apr 2005
Location: GA
Posts: 148
Update: My flow bench works! The leaf blower doesn't perform as well as I wanted, but it still moves alot of air. My first quick tests were on S4 and S5 AFM's. I haven't gotten a measurement scale on the manometers yet, so it was really just to see if it worked and which AFM pulled the least amount of vacumm.
I know everyone says that the S4 AFM flows better, but thats not entierly true. The only time I could make the S5 AFM flow less than the S4 AFM was by placing it at a downward angle. When placed in an upward angle it flowed much better. The S4's flow was affected more by rotating it to the side rather than by placing it in an up or down angle.
The difference in vacuum was 2mm in favor of the S5 AFM when both AFM's were placed horizontally. Although small, the difference is there. I will conduct a more refined test once I get the manometers set up with a scale of some kind(I'm leaning toward metric).
Something that I really can't test though are the effects of acceleration. It is very obvious that the S5 AFM is more sensitive to gravity/momentum along it's longitudinal axis; whereas, the S4 AFM is much less sensitive because of the way the measuring plate/door is made. Maybe (if I had a high speed data logger) I could measure the AFM potentiometer output as I drop the meter certain distances to simulate the affects of acceleration. Hmm...Nahh!
My very big thanks to Mr. Hanover for the inspiration to make my very own "REAL" flowbench. And it cost me <100$ + a few hours of labor.
I know everyone says that the S4 AFM flows better, but thats not entierly true. The only time I could make the S5 AFM flow less than the S4 AFM was by placing it at a downward angle. When placed in an upward angle it flowed much better. The S4's flow was affected more by rotating it to the side rather than by placing it in an up or down angle.
The difference in vacuum was 2mm in favor of the S5 AFM when both AFM's were placed horizontally. Although small, the difference is there. I will conduct a more refined test once I get the manometers set up with a scale of some kind(I'm leaning toward metric).
Something that I really can't test though are the effects of acceleration. It is very obvious that the S5 AFM is more sensitive to gravity/momentum along it's longitudinal axis; whereas, the S4 AFM is much less sensitive because of the way the measuring plate/door is made. Maybe (if I had a high speed data logger) I could measure the AFM potentiometer output as I drop the meter certain distances to simulate the affects of acceleration. Hmm...Nahh!
My very big thanks to Mr. Hanover for the inspiration to make my very own "REAL" flowbench. And it cost me <100$ + a few hours of labor.
11-28-2005, 05:41 PM
#46
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Join Date: Jan 2004
Location: Central Ohio (Hebron) Zephyrhills Fla.
Posts: 1,322
Originally Posted by Newguy707' post='782008' date='Nov 28 2005, 09:55 AM
Update: My flow bench works! The leaf blower doesn't perform as well as I wanted, but it still moves alot of air. My first quick tests were on S4 and S5 AFM's. I haven't gotten a measurement scale on the manometers yet, so it was really just to see if it worked and which AFM pulled the least amount of vacumm.
My very big thanks to Mr. Hanover for the inspiration to make my very own "REAL" flowbench. And it cost me <100$ + a few hours of labor.
You are entirely welcome.
The throttle is used to establish the same vacuum on both test pieces, as shown on the vertical monometer connected to the front box. So, each test would begin with perhaps 5" of water movement in the vertical monometer.
The outcome of each test will be the upper monometer showing more or less pressure in the back box. The angle of the upper monometer determines the sensitivity of the monometer, and the flow bench. Thus the need for a level test surface.
Lynn E. Hanover
12-09-2005, 10:22 AM
#47
Member
Join Date: Aug 2002
Location: Orlando, Fl.
Posts: 70
Interesting thread. Theres a DIY flowbench and dyno forum somewhere, cant remember the url. Ill pass it along if I see it again. Mine uses vacuum motors from Grainger. They were like $60 each. If you have alot of power you can get some serious depression, but build strong. I sucked the partition out of mine when leak checking it. Sounded like a bomb going off. LOL Lynn, I cant tell you how many times I've emptied the manometers. Its like locking the keys in your car. You realize it the instant the door clicks shut.
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