airflowoptions
Differences
This shows you the differences between two versions of the page.
| Both sides previous revision Previous revision Next revision | Previous revision Next revision Both sides next revision | ||
|
airflowoptions [2009/09/29 09:18] twdorris |
airflowoptions [2010/01/28 11:13] twdorris |
||
|---|---|---|---|
| Line 3: | Line 3: | ||
| If you're not sure how airflow plays into the grand scheme of engine management, then please read the [[engineandecu101|Engine and ECU operation page]] first. | If you're not sure how airflow plays into the grand scheme of engine management, then please read the [[engineandecu101|Engine and ECU operation page]] first. | ||
| + | |||
| Line 11: | Line 12: | ||
| * Are generally easy to install, but they do add some constraints on piping layout just because of their location. | * Are generally easy to install, but they do add some constraints on piping layout just because of their location. | ||
| * Generally provide very smooth, accurate airflow data and work well with our ECUs. | * Generally provide very smooth, accurate airflow data and work well with our ECUs. | ||
| - | * Are insensitive to changes in engine VE and atmospheric conditions. | + | * Are __not__ sensitive to changes in engine VE and atmospheric conditions. |
| * Use both IAT and Baro inputs to the ECU (preventing you from connecting other sensors to those inputs for logging). | * Use both IAT and Baro inputs to the ECU (preventing you from connecting other sensors to those inputs for logging). | ||
| * Can provide some restriction to airflow to the turbo. This can be a hot topic for debate, though. We generally feel this restriction is minimal at best and for most people should not be a major consideration. Just make sure you replace the stock snorkel between the MAS outlet and turbo inlet with a larger pipe and you shouldn't have anything to be concerned with on this topic. | * Can provide some restriction to airflow to the turbo. This can be a hot topic for debate, though. We generally feel this restriction is minimal at best and for most people should not be a major consideration. Just make sure you replace the stock snorkel between the MAS outlet and turbo inlet with a larger pipe and you shouldn't have anything to be concerned with on this topic. | ||
| * Have some very real limitations on airflow metering capacity. This is particularly problematic for the 1G DSM sensor. The 2G DSM is better and the EVO8 is really very nice. Some details on the limits can be found on our [[maffrequencylimits|MAF Data page]]. Generally speaking, a 2G DSM MAS with ECMLink's MAFClamp function can work well to 30psi on a 2 liter engine. An EVO8 MAS works well beyond that, particularly when combined with ECMLink's MAFClamp function. | * Have some very real limitations on airflow metering capacity. This is particularly problematic for the 1G DSM sensor. The 2G DSM is better and the EVO8 is really very nice. Some details on the limits can be found on our [[maffrequencylimits|MAF Data page]]. Generally speaking, a 2G DSM MAS with ECMLink's MAFClamp function can work well to 30psi on a 2 liter engine. An EVO8 MAS works well beyond that, particularly when combined with ECMLink's MAFClamp function. | ||
| + | |||
| ===== GM mass airflow sensors ===== | ===== GM mass airflow sensors ===== | ||
| Line 23: | Line 25: | ||
| * Are **not** sensitive to changes in [[gmiateffect|air temperature]]. | * Are **not** sensitive to changes in [[gmiateffect|air temperature]]. | ||
| * Are **very** sensitive to moisture. This can (and often does) lead to erratic behavior after a good rain, for example, or anything that produces condensation and/or water droplets before the sensor. This is mainly a problem when installed after the turbo. | * Are **very** sensitive to moisture. This can (and often does) lead to erratic behavior after a good rain, for example, or anything that produces condensation and/or water droplets before the sensor. This is mainly a problem when installed after the turbo. | ||
| - | * Are **very** sensitive to piping layout before/after the sensor. Running a 2.25" piping up to a 3.5" GM MAS is a problem... Installing the sensor right after a 90deg bend is a problem... Anything that changes airflow direction or cross sectional density just before the sensor is a problem. | + | * Are **very** sensitive to piping layout before/after the sensor. Running 2.25" piping up to a 3.5" GM MAS is a problem... Installing the sensor right after a 90deg bend is a problem... Anything that changes airflow direction or cross sectional density just before the sensor is a problem. |
| These sensors are designed to work with laminar airflow through the entire cross sectional area of the sensor. | These sensors are designed to work with laminar airflow through the entire cross sectional area of the sensor. | ||
airflowoptions.txt ยท Last modified: 2024/03/15 11:16 (external edit)
Page Tools
Except where otherwise noted, content on this wiki is licensed under the following license: CC Attribution-Share Alike 4.0 International
