Hi folks,
I've been doing a little investigation into our intake setup and have learned the following:
1. Dual 57mm-plate throttle body:
- Total Area: 5103.5mm^2
- Effective Flow Diameter: 80.6mm
2. MAF Sensor Assy:
- Intake Diameter: 92mm
- Output Diameter: 85mm
- Diameter at vane: 79mm
- Area blocked by vane: 1501mm^2
- Total *unobstructed* Area: 3401mm^2
- Effective Diameter: 65.8mm
- Sampling tube Diameter: 9.9mm
- Sampling tube Area: 77mm^2
- Ratio of Total Area/Sampling Area: 44:1
3. Rubber Airbox Silencer
- Input Diameter: 74.5mm
- Input Cross-sectional area: 4365mm^2
OK, So what am I getting at here? Basically, I've just convinced myself that the bottleneck in our intake tract is the MAF sensor body and then the silencer. In my case, I have a 100mm Densecharger so I have no silencer restriction.
Interestingly enough, a standard GT has a 65mm diameter throttle body and it's MAF sensor has an effective diameter of 65.8mm.... therefore they are matched! Now, Ford gave us the Cobra throttle body which, if it were a single plate TB, it's effective diameter would be 80.6mm. However, we have the same MAF with an effective flow diameter of 65.8mm.
I'm starting to think that an aftermarket flow meter like C&L or Pro-M would be a good next mod for me. What I'd really like to do is build my own new MAF body and reuse the stock sensor. I'd basically use an 80mm I.D. tube with NO post inside and then add another sampling tube inside that has the same ratio of cross-sectional areas therefore the original calibration should still be good. This new sampling tube diameter would be 12.8mm.
What do you guys think? Do any of you have the Pro-M or C&L meters and how much gain (or loss) did you get on the dyno?
Thanks,
Mark
_________________
BLACK BULLITT
#05434
Mods: Steeda Triax, Steeda Underdrive Pullies, JBA Silver-Ceramic Shorty Headers, Magnaflow X-pipe w/cats, Magnaflow Cat-back Exhaust, FRRP Aluminum Driveshaft, 100mm Densecharger
-------------
248.4rwhp
280.8rwtq
<font size=-1>[ This Message was edited by: mjchip on 2001-11-25 17:42 ]</font>
I've been doing a little investigation into our intake setup and have learned the following:
1. Dual 57mm-plate throttle body:
- Total Area: 5103.5mm^2
- Effective Flow Diameter: 80.6mm
2. MAF Sensor Assy:
- Intake Diameter: 92mm
- Output Diameter: 85mm
- Diameter at vane: 79mm
- Area blocked by vane: 1501mm^2
- Total *unobstructed* Area: 3401mm^2
- Effective Diameter: 65.8mm
- Sampling tube Diameter: 9.9mm
- Sampling tube Area: 77mm^2
- Ratio of Total Area/Sampling Area: 44:1
3. Rubber Airbox Silencer
- Input Diameter: 74.5mm
- Input Cross-sectional area: 4365mm^2
OK, So what am I getting at here? Basically, I've just convinced myself that the bottleneck in our intake tract is the MAF sensor body and then the silencer. In my case, I have a 100mm Densecharger so I have no silencer restriction.
Interestingly enough, a standard GT has a 65mm diameter throttle body and it's MAF sensor has an effective diameter of 65.8mm.... therefore they are matched! Now, Ford gave us the Cobra throttle body which, if it were a single plate TB, it's effective diameter would be 80.6mm. However, we have the same MAF with an effective flow diameter of 65.8mm.
I'm starting to think that an aftermarket flow meter like C&L or Pro-M would be a good next mod for me. What I'd really like to do is build my own new MAF body and reuse the stock sensor. I'd basically use an 80mm I.D. tube with NO post inside and then add another sampling tube inside that has the same ratio of cross-sectional areas therefore the original calibration should still be good. This new sampling tube diameter would be 12.8mm.
What do you guys think? Do any of you have the Pro-M or C&L meters and how much gain (or loss) did you get on the dyno?
Thanks,
Mark
_________________
BLACK BULLITT
#05434
Mods: Steeda Triax, Steeda Underdrive Pullies, JBA Silver-Ceramic Shorty Headers, Magnaflow X-pipe w/cats, Magnaflow Cat-back Exhaust, FRRP Aluminum Driveshaft, 100mm Densecharger
-------------
248.4rwhp
280.8rwtq
<font size=-1>[ This Message was edited by: mjchip on 2001-11-25 17:42 ]</font>