Jump to content
HybridZ

RTz

Administrators
 View Profile  See their activity

  • Posts

    2941

  • Joined

  • Last visited

  • Days Won

    23

 Content Type 

Posts posted by RTz

    Is ms sequential

    in MegaSquirt

    Posted

    If i already had a batch fire i wouldnt care but since i dont have anything i may as well go for the best

     

    No such thing as "the best".

     

    And, while sequential has merits, it certainly isn't the be-all-end all feature of features. Be careful with putting so many eggs in one basket.

    Was: How much Caster is too much? Now: Caster and Ackerman

    in Brakes, Wheels, Suspension and Chassis

    Posted · Edited by RTz

    I think you are correct. a custom x member that moves the LCA inner mounts forward and inch, while leaving the steering rack in its factory position front to back would help a lot. It would also increase the wheelbase a little so you'd have to watch out for tire interference.

     

    Moving the inboard pick-up, on its own, has no effect on Ackerman. As stated earlier, moving the outboard pick-up (forward) does, providing the steering knuckle follows it (or moves even farther forward).

     

    What you're looking for is a change in angle between the steering knuckle pivot points and the tie rod pivot points. If you make a change that does not effect that angular relationship, it's not doing anything for Ackerman. Change that angle and you change Ackerman.

     

     

    Ackerman.jpg

    The BMW Daily Driver Thread

    in Non Tech Board

    Posted · Edited by RTz

    I have heard similar things. A good friend of ours has an E-30 M3, mostly essentially stock, but at 2.5L, that he recently boosted and is insanely quick. RTz I’m sure will chime in with more…

     

    Yup, Anders has done a beautiful job boosting a nearly stock S14. Internally stock save for the 2.5L bump, a little healthier intake cam, and a Cometic head gasket (CR now 8.5:1). He's nearly maxing out four 750cc injectors... you do the math.

     

    Anders is a Mid-Ohio record setter... suspension/brakes have been addressed as well. I've driven the car a few times and it's one of the most entertaining car's I've ever driven. He still heckles me for selling my M3.

     

    http://www.s14.net/forums/showthread.php?t=33808

    510 (Bart), SR20DET powered w/BMW suspension

    in Other vehicles

    Posted · Edited by RTz

    I'm behind on the SR updates. You'll just have to forgive :wink:

     

    An interim update for now...

     

    Probably my least favorite thing about a 510 is the instrument panel. Can't really explain it. I just don't like it (see post #1). Since completing the SR swap, I've been running around dashless, with nothing more than water temp and fuel gauge dangling from the underlying dash frame. It's gotten OLD. Very old.

     

    Different ideas have been rattling around in my head for a while, and long story short, I finally settled on a fairly simple design. It includes seven VDO Vision gauges, and an Innovate G5 AFR gauge. Plasma cut and formed from 1/8" Aluminum...

     

     

    CAD_Dash.jpg

     

     

     

    DimeDashA.jpg

     

     

     

    Much left to do... contouring/welding up the end panels, mounting, wiring, misc. switches & indicator lights, vents, finish work, etc.

     

     

    Gauges-

     

    • Speedometer
    • Tachometer
    • Boost
    • AFR
    • Water Temp.
    • EGT
    • Air Temp. (serving double duty as both ambient and post intercooler)
    • Fuel

    VIPEC is here...

    in Other EMS

    Posted · Edited by RTz

    Why not just set your timing, and AFR and run in closed loop mode? Especially because you can do that at WOT.

     

     

    Because a post-calculated AFR is not the same as a pre-calculated AFR. With current technology there is some delay... the distance from the chamber to the O2 sensor, sensor response time, and the ECU's reaction time become a factor with rapid engine acceleration. On a static dyno, salt flat car, stationary engine, etc, closed-loop WOT can work well because the transition rates are either slow or non-existent. A turbo car making a blast through low gears happens too quickly for closed-loop to work properly.

     

     

    I wonder how quick tune will work on the street - without access to a dyno?

     

    Expect accelerated brake wear :wink:

    VIPEC is here...

    in Other EMS

    Posted

    The Quicktune feature looks interesting....

     

    "At any time after tuning is finished the values in the target closed loop table can be changed, and the engine will automatically run the new air fuel ratio"

×
×
  • Create New...