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Ferrari chassis dyno testing

Discussion in 'Ferrari Discussion (not model specific)' started by SteveB, Feb 24, 2004.

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  1. atlantaman

    atlantaman Formula 3

    Mar 31, 2002
    1,726
    Roswell, Georgia
    Full Name:
    Charles
    #26 atlantaman, Feb 25, 2004
    Steve--I hope you set the REV limiter at 7k on this motor--looks like SERIOUS leaning out at above 7k
     
  2. SteveB

    SteveB Karting

    Oct 5, 2003
    62
    Puyallup, WA
    Full Name:
    Steve Barker
    #27 SteveB, Feb 25, 2004
    I use 92 octane pump gas from my local Union 76 dealer.

    The leaning out above 7K is kind of an anomaly. Every once in a while I will see this. It has something to do with when I let off the gas and push the stop recording button.

    As a side note, this motor is an all aluminum 542" Big Block Chevy. It made 838 horsepower on an engine dyno prior to installing it in the car. I am in the process of replacing that motor with a new 632" all aluminum one. Preliminary tests on the engine dyno have resulted in 1062 hp and 890 ft.lbs. of torque - naturally aspirated. I do plan on running nitrous with this one as well. My goal is around 1400 hp to the rear wheels! As you can tell I like aluminum motors that make a lot of power.

    Steve
     
  3. atlantaman

    atlantaman Formula 3

    Mar 31, 2002
    1,726
    Roswell, Georgia
    Full Name:
    Charles
    #28 atlantaman, Feb 25, 2004
    Steve--I hope you set the REV limiter at 7k on this motor--looks like SERIOUS leaning out at above 7k
     
  4. 4sfed4

    4sfed4 Karting

    Dec 22, 2003
    231
    #29 4sfed4, Feb 25, 2004
    Holy smokes! I almost thought that your wideband filter was dirty :D (Dirty filter makes the A/F read higher....I found that out the hard way.)

    What type of EGT do you see at that A/F ratio on 92 octane?
     
  5. SteveB

    SteveB Karting

    Oct 5, 2003
    62
    Puyallup, WA
    Full Name:
    Steve Barker
    #30 SteveB, Feb 25, 2004
    I have EGT's on every cylinder and monitor them after every run. I use the Racepak data acquisition system.

    As an example, these are the numbers from that run at 7000 rpm:

    1 - 1318
    3 - 1310
    5 - 1279
    7 - 1337

    2 - 1301
    4 - 1280
    6 - 1216
    8 - 1370

    Steve
     
  6. SteveB

    SteveB Karting

    Oct 5, 2003
    62
    Puyallup, WA
    Full Name:
    Steve Barker
    #31 SteveB, Feb 25, 2004
    The leaning out above 7K is kind of an anomaly. Every once in a while I will see this. It has something to do with when I let off the gas and push the stop recording button.
     
  7. 4sfed4

    4sfed4 Karting

    Dec 22, 2003
    231
    #32 4sfed4, Feb 25, 2004
    Wow.....much lower than I would have thought with that type of power on that fuel!

    On pump gas, I see 1750+ out of my 2.2L and I am making nowhere near 700 whp (more like 425 whp).

    Maybe you need to tune my car :D
     
  8. SteveB

    SteveB Karting

    Oct 5, 2003
    62
    Puyallup, WA
    Full Name:
    Steve Barker
    #33 SteveB, Feb 25, 2004
    What is even better are the numbers from the 1192 rwhp run:

    1 - 1383
    3 - 1410
    5 - 1371
    7 - 1408

    2 - 1372
    4 - 1453
    6 - 1427
    8 - 1479

    Steve
     
  9. thomas_b

    thomas_b Formula Junior

    Sep 15, 2003
    765
    #34 thomas_b, Feb 25, 2004
    sorry Mitch - besides that I want to see the dyno setup that allows 100 runs!!! I also think that dynos are not that accurate

    a good summary to read is “Listening to the Voice of the Customer: Inertia Dyno Horsepower Versus Oem-Rated Net Horsepower” by Robert A. Smithson and Jeremy John Carter – it can be downloaded on www.sae.org (unfortunately for $12)

    they analyze all the variables and problems with dyno measurements and how they relate to car manufacturer HP ratings
     
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