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Recent content by ChriswithaC

  1. ChriswithaC

    Caliper Piston Material Q?

    Thanks for all of the replies guys. Really appreciate it. I ended up finding some StopTech pistons that looked nearly identical so I suggest my friend give them a shot. When they finally arrived I measured them up and compared them to the existing pistons. They were nearly identical and all...
  2. ChriswithaC

    Caliper Piston Material Q?

    I was wondering if you guys could offer some input into selecting a material for some replacement caliper pistons. A friend of mine were doing some work on his car and ended up having to pull the brakes off. When we took the brakes off we noticed that one of the pistons was missing a large...
  3. ChriswithaC

    Help with scaling Bosch HFM MAF mdot/V table

    We are indeed on the same page. Thank you for chiming in. I appreciate the help :) I have had quite a bit of luck tuning the correction table, but that will all go out the window after I add in a flow-straightener. ..........is there a technical term for this?? I have tried to find an...
  4. ChriswithaC

    Help with scaling Bosch HFM MAF mdot/V table

    That MAF sensor in a particular housing uses the same 1x512 table for flow vs. voltage regardless of what piping system they are in. I have verified this.....trust me. The 14x14 correction tables, however, between each are are very different. This is because of the reasons you're describing...
  5. ChriswithaC

    Help with scaling Bosch HFM MAF mdot/V table

    They are indeed the same MAF element in different housings right from the factory. The transfer functions are not simply just scaled though. The Bosch Motronic software also has a 3d table that corrects for flow areas with strange turbulence and flow irregularities in addition to the 1x512...
  6. ChriswithaC

    Help with scaling Bosch HFM MAF mdot/V table

    I really appreciate the advice with how to tune.....but I've got that covered. This isn't my first rodeo when it comes to tuning. My Audi is equipped with a wideband O2 sensor as well as an amazing knock sensing system. MAF scaling, however, is new to me. Luckily for me I have access to...
  7. ChriswithaC

    Help with scaling Bosch HFM MAF mdot/V table

    Pat, I'm pretty familiar with the tuning process and have a very good grasp of the tuning process. I also have much larger injectors that I plan to put back in one I get this MAF scaling sorted out. I completely agree with the "Mathematical methods are good for starting points, but...
  8. ChriswithaC

    Help with scaling Bosch HFM MAF mdot/V table

    Thanks for getting back to quickly guys. I really appreciate it. @gruntguru: I'm currently running the car with the MAF scaled at 38% larger and it seems to be running well from what I can tell, but I am running the stock fuel injectors at the moment to minimize the variables while tuning the...
  9. ChriswithaC

    Help with scaling Bosch HFM MAF mdot/V table

    I've been searching all over car forums and chip-tuning forums for help with this, but I don't know why it didn't occur to me to seek the information here. Here is the situation: I am tuning my own turbocharged car and have had to move to a larger Mass Airflow Sensor because the stock one was...

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