I'm gonna try the small-bore MAF boring. I bought all this for $26 on Ebay.
07-20-2004, 11:23 AM
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I'm gonna try the small-bore MAF boring. I bought all this for $26 on Ebay.
$26 plus $14 shipping or something like that:
<img src="http://www.lightworksmediagroup.com/images/petes/misc/MAF/wholeIntake.jpg" />
Why my Airbox top is better than yours (notice stock velocity stack):
<img src="http://www.lightworksmediagroup.com/images/petes/misc/MAF/airboxTop.jpg" />
Almost ready to get some epoxy down there and start grinding:
<img src="http://www.lightworksmediagroup.com/images/petes/misc/MAF/MAFreadyToEpoxy.jpg" />
The actual sensor is claimed to still work, but this whole system looks like it's been sitting in the junkyard weather for a bit too long. The sensor does look ok except for the missing cap to the potentiometer. There is some corosion on the EGR frequency valve thingy and also the intake switchover valve thingy. "Thingy" is the technical term for that solenoid part.
**And now my semi-random-monthly image of the day for you to sit and scoff at (I'm about to sneeze):
<img src="http://www.lightworksmediagroup.com/images/petes/misc/achoo.jpg" />
<img src="http://www.lightworksmediagroup.com/images/petes/misc/MAF/wholeIntake.jpg" />
Why my Airbox top is better than yours (notice stock velocity stack):
<img src="http://www.lightworksmediagroup.com/images/petes/misc/MAF/airboxTop.jpg" />
Almost ready to get some epoxy down there and start grinding:
<img src="http://www.lightworksmediagroup.com/images/petes/misc/MAF/MAFreadyToEpoxy.jpg" />
The actual sensor is claimed to still work, but this whole system looks like it's been sitting in the junkyard weather for a bit too long. The sensor does look ok except for the missing cap to the potentiometer. There is some corosion on the EGR frequency valve thingy and also the intake switchover valve thingy. "Thingy" is the technical term for that solenoid part.
**And now my semi-random-monthly image of the day for you to sit and scoff at (I'm about to sneeze):
<img src="http://www.lightworksmediagroup.com/images/petes/misc/achoo.jpg" />
07-20-2004, 02:17 PM
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I'm not sure how I'm gonna do it yet; don't know if I'll leave part of the orifice in tact where the
sensor goes. In other words, I'd be leaving that little tube where the sensor goes, but cutting out the rest of the small-bore.
07-20-2004, 03:18 PM
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The main restriction is in the tail end of the housing
To eliminate it, I made a new tail part out of a solid block of aluminum. Then, when more air can go through body of MAF, you have to encourage more air to go past the sensor or you will end up too lean- throwing codes and invoking knock sensors and such.
That is accomplished by eliminating the swerl chamber on the back end of the sensor bore and introducing a mini VS on the front side.
Finally, you need to open up the remaining bore. A nice taper in front of that will pass more air. You get the nice taper with epoxy putty and hand shaping. You open the bore up with a milling machine or lathe and 4 jaw chuck.
Oh, I suppose you could also do it with a dremel tool and several weeks of grinding.
This is not a path I'd ever take again.
It's way easier to modify or use a stock 471 housing. You will get similar air flow for lots less work.
That is accomplished by eliminating the swerl chamber on the back end of the sensor bore and introducing a mini VS on the front side.
Finally, you need to open up the remaining bore. A nice taper in front of that will pass more air. You get the nice taper with epoxy putty and hand shaping. You open the bore up with a milling machine or lathe and 4 jaw chuck.
Oh, I suppose you could also do it with a dremel tool and several weeks of grinding.
This is not a path I'd ever take again.
It's way easier to modify or use a stock 471 housing. You will get similar air flow for lots less work.
07-20-2004, 03:37 PM
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Here is a fabrication option to consider...
eMachineShop,
http://www.emachineshop.com/
I just found this in an IT trade rag. Have not tried it out, but it's interesting and might have value to the forum...
you can download a powerful yet straightforward CAD program to design objects. You then specify the material and submit your design to the site, and eMachineShop will price it according to the materials and machining or forming difficulty, along with the number of steps involved in manufacturing and finishing. The available materials range from every imaginable kind of plastic to metals such as aluminum, brass, and steel. You can specify bending, drilling, milling, turning, and various other operations. You can also specify finishes, including plating and powder coating.
The eMachineShop software prices your job on the spot, while the 3D rendering is on your screen. You find out what your part or run of parts will cost you in minutes, not days. When you give the okay, eMachineShop makes your parts and ships them to you. It's a full-capability fabrication facility that you pay for on an as-needed basis. Customers have created both simple and complex parts; you can see some photos on the site.
http://www.emachineshop.com/
I just found this in an IT trade rag. Have not tried it out, but it's interesting and might have value to the forum...
you can download a powerful yet straightforward CAD program to design objects. You then specify the material and submit your design to the site, and eMachineShop will price it according to the materials and machining or forming difficulty, along with the number of steps involved in manufacturing and finishing. The available materials range from every imaginable kind of plastic to metals such as aluminum, brass, and steel. You can specify bending, drilling, milling, turning, and various other operations. You can also specify finishes, including plating and powder coating.
The eMachineShop software prices your job on the spot, while the 3D rendering is on your screen. You find out what your part or run of parts will cost you in minutes, not days. When you give the okay, eMachineShop makes your parts and ships them to you. It's a full-capability fabrication facility that you pay for on an as-needed basis. Customers have created both simple and complex parts; you can see some photos on the site.
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