That was the peak, transient, lateral (side-to-side) "g" reading I got during one of the runs.

No, I don't have a g-tech performance meter. I almost bought one a few months ago, but now I'm glad I didn't. Instead, I bought a phone.

Ok, I was going to buy an iPhone anyway, but after I did, one of the first apps I installed is something called Dynolicious. It's basically a g-tech-style performance meter that uses the built-in 3-axis accelerometers in the phone to detect and record 0-60, 1/4 mile, etc etc elapsed times and mph, and given the car's weight, calculates HP. Plus it's got a "skidpad" mode that shows you real time and max lateral, braking, and acceleration g's. It costs $12.99, a bit cheaper than the gtech.

What it lacks is the ability to record a lap, but I emailed them and they said they're working on a new version what will combine the GPS signal and record g forces along with the car's position on the track.

I'm in the process (I use that term lightly, progress is very slow nowadays) of building a good mount for the phone on the console. Then it will be much easier to get good 0-60 times and such.

While trying it out (just holding it down with my hand) I got some lousy accel times, but then I wasn't in a good place to do a good launch. I did see 1.0gs of braking, though.

For the autoX, I used velcro to hold the phone to the console. I guess it worked well, but it's ugly. I don't like the usual stuff in the stores either, so I'll build my own.

There's another program for the iPhone called gMeter for $8.99 that also looks pretty good, I may try that one too once I get my mount built. It can email the results to my account, so I can import them into a spreadsheet and do graphs or whatever else.

Cool stuff.

Erwin 89 750iL Lowered (a little)

Mouse over for details >>> Engine/Driveline Wolf engine and throttle chips 19 lb, 4-hole (Design 3) fuel injectors Custom Intake based on 850csi parts Custom Cold Air Boxes Royal Purple 20W-50 3.64 LSD w/Royal Purple gear lube Royal Purple trans fluid Interior Phone removed, replaced with cut-to-length dash wood trim on hinge E38 Shifter Knob, Console Plate, and Boot M-Tech 2 M-technic Steering Wheel - air bag deleted E38 Self-Dimming Mirror Interior Light Fading Module (Shogun special) Audio BMW Business CD Player "CD43" Head Unit Refurbished factory amp w/equalizer Bass blockers (300hz/4ohm) on stock front kick panel speakers Rear deck speakers: Alpine SPS-13C2 5.25" 2 way 175 Watt with bass blockers Subwoofers: 2 JBL GTO804 8" 4-ohm subs Subwoofer install: custom sealed enclosure mounted behind ski bag opening Subwoofer amp: Alpine MRP-M450 400w MONO CD changer relocated to driver's door bottom pocket, actuated by bio- mechanical arm controlled by semi-intelligent nut behind the wheel Suspension H&R Lowering Springs (1/2 coil removed from fronts) Koni adjustable front shocks Stock rear shocks (self leveling) Racing Dynamics Stress Bar Stock front sway bar Dinan rear sway bar - 21mm M5 aluminum lower control arms Racing King rear subframe delrin inserts Front tires: 245-40-18 Goodyear Eagle F1 GS-D3 on 8.5" EuroTech rims Rear tires: 275-40-18 Michelin Pilot Sport PS1 on 9.5" EuroTech rims Exterior/Body 25% Side tint, 5% Rear tint BMW Mud flaps - rears trimmed to tire width Rear fender lips rolled Smoked side markers (after pic taken) Euro Smiley Headlights (after pic taken) Soft close trunk retrofit E66 trunk emblem "750 iL" (after pic taken) Zymol wax Way too many paint chips touched up Brakes Front Rotors: 850CSi, 324 X 30 mm, cross-drilled and slotted Rear Rotors: stock size, cross-drilled and slotted Pads: Hawk Performance Ceramic (may switch to HPS) Stainless steel lines Racing Blue brake fluid

• Had some fun last Sunday (pic) - erwin 2008-08-12 23:42:23 (240 views)
  • I forgot to mention: 1.02 lateral gs - erwin 2008-08-19 15:48:36 (38 views)
  • Re: Had some fun last Sunday - blackbmuu 2008-08-15 17:53:58 (41 views)
  • so what was the final outcome? - beach911 2008-08-15 04:58:19 (52 views)
    • Well, ok - erwin 2008-08-15 11:33:54 (84 views)
      • Not too shabby! - bcweir750 2008-08-15 12:58:11 (38 views)
  • Way to go!.... - realtygary 2008-08-13 01:59:44 (44 views)
  • That must be fun:) Great car (nt) - alv12 2008-08-13 00:38:21 (47 views)
    • Way to go erwin! - bcweir750 2008-08-13 00:48:51 (52 views)
      • Cool place for your 750 Erwin...love your strut bar :) (nt) - eliasazem 2008-08-16 11:21:39 (35 views)