difference between FAST kit and Murph's
10-02-2006, 06:26 PM
#31
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Originally Posted by aggravation
One question for you or any others reading this. The car has an air fuel mixture gauge in the cockpit to watch for too lean conditions, it was described as a bar graph kind of read out, was this something that came with the FAST kit and would that operate on the stock sensor or would that lead you to think that a new/improved sensor had been installed.
To keep it simple, the car will either have a narrowband (likely) or wideband (unlikely) sensor permanently installed. Each type of sensor has a certain kind of gauge to work with it (a narrowband gauge doesn't work on a wideband sensor and vice versa).
The narrowband sensor is useful for basic troubleshooting but not for accurate AFR indication. The wideband sensor can be used to troubleshoot AND determine current AFR.
To be honest, i'd just run the stock narrowband sensor with no gauges. Reasoning is:
#1: any properly boosted car in good shape won't just randomly screw up the AFR. If it does, then that means something is broken, THEN you can temporarily hookup the gauge to troubleshoot.
#2: in any properly boosted car, you'll likely be paying more attention to the road than the gauge.
#3: if you're paying more attention to the gauge than the road, its a dangerous distraction.
Same goes for boost gauges... your car won't "magically" make more boost (at least with a supercharger). The only thing I see useful is the vacuum reading which again is for troubleshooting only.
10-02-2006, 06:27 PM
#32
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Originally Posted by aggravation
Tim, thanks for the info!
A $2000 deduction from the total cost of your kit would be a substantial savings. Enough that I'd definitely have to consider switching to the Murph version as a possible upgrade path...if an upgrade is in my future.
One question for you or any others reading this. The car has an air fuel mixture gauge in the cockpit to watch for too lean conditions, it was described as a bar graph kind of read out, was this something that came with the FAST kit and would that operate on the stock sensor or would that lead you to think that a new/improved sensor had been installed.
I'm trying to learn a lot in a very short period of time here so forgive the stupid questions I'm bound to ask a few more at least.
Thanks again to all for adding to my knowledge by chiming in here with your thoughts etc.
PS: The owner has saved all the original parts. From the take offs during the SC install down to the original wheels, exhaust etc. so it could probably be put back to stock pretty easily. It looks like I'll have a nice chance to pursue a number of paths... a turbo or a beefier SC, or leave it as is and just smile.
A $2000 deduction from the total cost of your kit would be a substantial savings. Enough that I'd definitely have to consider switching to the Murph version as a possible upgrade path...if an upgrade is in my future.
One question for you or any others reading this. The car has an air fuel mixture gauge in the cockpit to watch for too lean conditions, it was described as a bar graph kind of read out, was this something that came with the FAST kit and would that operate on the stock sensor or would that lead you to think that a new/improved sensor had been installed.
I'm trying to learn a lot in a very short period of time here so forgive the stupid questions I'm bound to ask a few more at least.
Thanks again to all for adding to my knowledge by chiming in here with your thoughts etc.
PS: The owner has saved all the original parts. From the take offs during the SC install down to the original wheels, exhaust etc. so it could probably be put back to stock pretty easily. It looks like I'll have a nice chance to pursue a number of paths... a turbo or a beefier SC, or leave it as is and just smile.
Last edited by Tim Murphy; 10-02-2006 at 06:42 PM.
10-02-2006, 06:28 PM
#33
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Originally Posted by Tim Murphy
I've done so much testing on my system that I no longer include any gauges with the kit, not required. I would say that 50% of my customers still install gauges in their cars and I think that is a good idea because it gives you some extra diagnostic capability if you are having any issues (ie a weak fuel pump).
i ripped all the gauges out after i realized they just do the same thing every time
10-02-2006, 06:30 PM
#34
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Originally Posted by mspiegle
It is likely the stock narrowband sensor.
To keep it simple, the car will either have a narrowband (likely) or wideband (unlikely) sensor permanently installed. Each type of sensor has a certain kind of gauge to work with it (a narrowband gauge doesn't work on a wideband sensor and vice versa).
The narrowband sensor is useful for basic troubleshooting but not for accurate AFR indication. The wideband sensor can be used to troubleshoot AND determine current AFR.
To be honest, i'd just run the stock narrowband sensor with no gauges. Reasoning is:
#1: any properly boosted car in good shape won't just randomly screw up the AFR. If it does, then that means something is broken, THEN you can temporarily hookup the gauge to troubleshoot.
#2: in any properly boosted car, you'll likely be paying more attention to the road than the gauge.
#3: if you're paying more attention to the gauge than the road, its a dangerous distraction.
Same goes for boost gauges... your car won't "magically" make more boost (at least with a supercharger). The only thing I see useful is the vacuum reading which again is for troubleshooting only.
To keep it simple, the car will either have a narrowband (likely) or wideband (unlikely) sensor permanently installed. Each type of sensor has a certain kind of gauge to work with it (a narrowband gauge doesn't work on a wideband sensor and vice versa).
The narrowband sensor is useful for basic troubleshooting but not for accurate AFR indication. The wideband sensor can be used to troubleshoot AND determine current AFR.
To be honest, i'd just run the stock narrowband sensor with no gauges. Reasoning is:
#1: any properly boosted car in good shape won't just randomly screw up the AFR. If it does, then that means something is broken, THEN you can temporarily hookup the gauge to troubleshoot.
#2: in any properly boosted car, you'll likely be paying more attention to the road than the gauge.
#3: if you're paying more attention to the gauge than the road, its a dangerous distraction.
Same goes for boost gauges... your car won't "magically" make more boost (at least with a supercharger). The only thing I see useful is the vacuum reading which again is for troubleshooting only.
10-02-2006, 06:53 PM
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Originally Posted by Kevin Michael
Mark, Are you talking about Tim Murphy? 
10-02-2006, 11:07 PM
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Originally Posted by Tim Murphy
Don't worry Kevin, your kit was 100% Murf928 developed and has nothing "FAST" about it.
Kevin
