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  • AdminTeam's Avatar
    Today, 10:47 PM
    Hey RyansMsport335i: :text-welcomewave:
    0 replies | 0 view(s)
  • Ingeniator's Avatar
    Today, 10:19 PM
    It would take a little more power to step up to 24v or 48v but the lower demand on the actuator motor may have been worth it. But it was a hypothetical I agree it is likely 12v for no other reason then the KISS principle.
    133 replies | 3404 view(s)
  • In33anity's Avatar
    Today, 09:31 PM
    In33anity replied to a thread BMW S65 MT in a 33 Ford in S65
    Thanks Nafoo and Blackout, much appreciated!!! *** Stopped by the plater early this am to drop off a bag of suspension bolts. Here's a sneak peak of some polished aluminum. Pretty stoked with how the garage made pieces are came out: Motor Mount: Transmission Mount: Oil Block: --I
    144 replies | 7897 view(s)
  • sdg1871's Avatar
    Today, 09:28 PM
    Not at all surprised that the C63 S trounced the F80 M3 in a straight line race. More cylinders, more displacement and more power.
    15 replies | 1233 view(s)
  • AdminTeam's Avatar
    Today, 09:23 PM
    Welcome to a real enthusiast forum ABR983.
    0 replies | 18 view(s)
  • sdg1871's Avatar
    9 replies | 184 view(s)
  • sdg1871's Avatar
    17 replies | 244 view(s)
  • ajm8127's Avatar
    Today, 09:12 PM
    LOL, sometimes I just flows. Where are you going to get 24 volts? Sure you could use a boost regulator, but that adds inefficiency and cost. The only reason you would use more voltage is if you were trying to limit the current. 12 volts is convenient because the car's electrical system is 12 volts. 5 volts may be too little because to get the same response and holding power you are going to need more than twice as much current as at 12 volts. But this is all very general. Without the requirements, it would be tough to say for certain, but I would start with the assumption 12 volts is going to be used to drive the actuator.
    133 replies | 3404 view(s)
  • MikeB@FFTEC's Avatar
    Today, 08:59 PM
    This GTR came in to have a set of brand new Toyo R888 tires installed before heading to the track. Final calibration underway on Oscar's RB25 240Z. We'll be seeing this monster again soon for some more goodies! Stay tuned for more updates. Kiran's super clean Evo 8 came in for some upgrades including an AEM intake system, Synapse Synchronic Diverter Valve, Invidia downpipe and a custom ECU calibration. Bandit stopped by for a visit! Ron dropped off his 996 Turbo for some TLC. This car has some very nice modifications installed including AMS Billet Turbos, ETS Intercoolers, FIC injectors, FFTEC Exhaust manifolds and an FFTEC Custom Exhaust system. Take a peek at this! Our Mustang EcoBoost with Borg Warner EFR turbo! Stay tuned for more updates on this exciting project. The Custom fuel system we've developed is complete on Boris' 996 GT2 and it's on the dyno for a custom ECU calibration! Michael's RB25 240Z is back for some more upgrades including a custom ignition system and exhaust modifications. Have a safe and happy holiday weekend everyone!
    106 replies | 3378 view(s)
  • Abacus38's Avatar
    Today, 08:40 PM
    Damn every time I did that it seems like the car falls flat on its face for second then magically picks back up
    25 replies | 301 view(s)
  • G0TB00ST?'s Avatar
    Today, 08:29 PM
    G0TB00ST? replied to a thread N52: hill assist in N55 and N52
    Ok... Feel free to move for your next thread to troll
    8 replies | 112 view(s)
  • BostonShant's Avatar
    Today, 08:16 PM
    Yes this was epping this past Wednesday. I'm gonna try to make it up again next Wednesday as long as it doesn't rain.
    25 replies | 301 view(s)
  • Sticky's Avatar
    Today, 07:56 PM
    1993 replies | 166878 view(s)
  • AdminTeam's Avatar
    Today, 07:50 PM
    Welcome nneklingnalbe, take a look around, I think you will like what you see.
    0 replies | 10 view(s)
  • Ingeniator's Avatar
    Today, 07:27 PM
    Well that triggered a book. lol. I also agree with pretty much everything you wrote. 4-20 is used as the sensor/control loop and some other driver is used to make the process variable change. I did learn some things about the can bus I was unaware of some of the benefits. It would be interesting to see what voltage the wastegates use. I could see a case for 24V just as much as 12v. Thanks.
    133 replies | 3404 view(s)
  • Torgus's Avatar
    25 replies | 301 view(s)
  • ajm8127's Avatar
    Today, 07:12 PM
    PWM is still current control. You just modulate the voltage to control the average current. In a motor or actuator this gives you control over the torque or force. You see PWM control in lots of places where you need higher current. The 4-20ma control would still need a high current driver at the load. You can't move much with only 20ma. Using an H bridge it is possible to drive hundreds of amps through a load using logic level PWM signals created by a micro controller. Almost every brushed DC motor with proportional control uses PWM. All brush less motors do, including golf carts, Priuses, forklifts, etc. I would be willing to bet that at the end of the 4-20ma control cable is a high current driver using PWM if anything moves such as in the case of a variable speed motor, unless we are talking about sensor feedback to the control system. The 4-20 ma is only a signal. You could replace 4-20 ma control with a CAN bus, for instance, but you could never replace PWM with a CAN bus or 4-20 ma control. One reason 4-20 ma might be popular in industrial automation is if you put current into a wire, you get the same current out. This is Kirchhoff's current law (KCL). So if you have a 1000 yard control cable run, you might drop 50 volts (an exaggeration, especially at such low currents), but you are guarantied to get the same current out as you put in. Same is true for a 100 yard run, so there is no calibration required. 4 ma is 4ma, no matter what. If you put 4 volts into a 100 yard cable, the voltage you get on the other side is going to be different than a 1000 yard cable assuming the same resistance is on the other end. A steady current flowing through a wire is unaffected by the wire's intrinsic inductance and capacitance. You can only run a CAN bus so far. This distance is dependent on frequency and this is due to the inductive and capacitive properties of copper wire. 4-20 ma either works or it is disconnected/shorted. With CAN you need twisted pair, only can go so far, etc. I could run a 4-20 ma control circuit from New York to LA if I had enough voltage to overcome the resistive losses in the cable. If you try to do high current PWM control over any considerable distance you are going to suffer huge power losses due to the current and the resistance of the wire. (Ohm's Law) The solution is send a low current, low frequency (DC) control signal over the far distance, and at the load create the PWM for proportional control to drive a variable speed motor, heating element, actuator, etc. This isn't a problem in a vehicle because the distance is so much shorter. Also you would need a separate 4-20 ma control lines for each device. Your imagination is the limit concerning the number of devices you can control with a single twisted pair running CAN. Little off topic, sorry, but in your example above an electronic waste gate would almost certainly be PWM controlled at 12 volts in a car. I would vote for normally open in case something went wrong then your waste gate wouldn't end up fully closed.
    133 replies | 3404 view(s)
  • 3000gt MR's Avatar
    Today, 06:53 PM
    Yum! one of me and my girlfriends favorites. I love Bulleit RYE and bourbon
    760 replies | 41574 view(s)
  • Sticky's Avatar
    Today, 06:52 PM
    Sticky replied to a thread Stock manual m4 dyno in S55
    5th gear seems to be inflating it. Strong regardless.
    1 replies | 21 view(s)
  • Sticky's Avatar
    760 replies | 41574 view(s)
  • 3000gt MR's Avatar
    Today, 06:38 PM
    GO RANGERS!!!!
    26 replies | 746 view(s)
  • quattr0's Avatar
    Today, 06:19 PM
    quattr0 started a thread Stock manual m4 dyno in S55
    5th gear run. I thought its a bit high. 4th gear was 42x whp Same Eurocharged location w the c63s dyno
    1 replies | 21 view(s)
  • AdminTeam's Avatar
    Today, 06:08 PM
    KlausHeinz, we appreciate you taking the time to join.
    0 replies | 13 view(s)
  • AdminTeam's Avatar
    Today, 05:55 PM
    Hey JIrwin: :text-welcomewave:
    0 replies | 9 view(s)
  • Ingeniator's Avatar
    Today, 05:28 PM
    Brew yourself some E98 while your at it.
    760 replies | 41574 view(s)
  • Sticky's Avatar
    Today, 05:04 PM
    I agree with this completely. Eagle Rare I'm REALLY liking. Went through my bottle so quickly I won't even say how fast it was. Evan Williams Single Barrel I have found for $23. It's really damn good stuff! Larceny I haven't tried. I want my own distillery. WhiskeyBoost maybe. Oh, BourbonBoost! Even better.
    760 replies | 41574 view(s)
  • richpike's Avatar
    Today, 05:01 PM
    Agreed. Bulleit is a very good value. But my favorites for $30 or so are Eagle Rare, Larceny or Evan Williams Single Barrel in that order. -Rich
    760 replies | 41574 view(s)
  • 3000gt MR's Avatar
    Today, 04:50 PM
    Not sure why everyone thinks that port injection has atomization issues. Its further away than most normal fuel injected engines and some engines run huge fuel injectors in locations closer to the valves than direct port meth. Also people are injecting E85 with 3 times the size injectors than what im even running, and they are closer. Meth vaporizes better than fuel and E85 so this isnt an issue at all. 2 Ways around this. 1 run a 7th nozzle in the CP. Something small for its sole purpose of cooling IAT. Theoretically this would richen the cylinders that receive more air. The plus is that its not your only source so even cyl distribution is still the biggest and safest gain. 2. Is using a E85 timing IAT corrections map. You may not be able to run it as aggressive but its a solid resolution. Thats why i have started and plan on running, Right now i have a 7th nozzle installed for a few reasons 1 being i have little time to dial in a tune before wannagofast in Georgia next weekend.
    60 replies | 2313 view(s)
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