Re: GTech comparisons (including png's 540iA) (archive)


:           M5       540i     M3
: 0-60      5.1s     6.2s     6.2s
: 1st       0.70g    0.57g    0.55g
: 2nd       0.55g    0.42g    0.44g
: 3rd       0.35g    0.28g    0.28g

: (FYI, with cooler temps and better traction, I've gotten upper-mid 5 second times in both the 540 and M3 before)

These measurements illustrate one of the weak links in the G-Tech story. I have a G-Tech Pro and a '99 540iA Sport with Dinan's cold-air intake, Stage II engine programming, and Steptronic transmission programming.

Prior to all the mods, I was getting 5.48 and 5.49-second 0-60 readings essentially every time I did my part during the launch. (DSC off, A/C off, RPMs to about 1,500 with the brakes on, then release the brake and roll the power on just fast enough to produce a little bit of tire spin, but not too much.)

With all the mods, I'm getting 5.30 to 5.33-second readings. Okay, great, it's just about as much faster as it ought to be given the relatively small amount of extra power added by the Dinan mods.

But would another G-Tech produce the same results? That is, are G-Tech results repeatable, and therefore transferable, from one G-Tech to another?

I expect that any recent 540i six-speed manual-transmission car ought to be faster than my car, regardless of the mods, but here we have evidence that my G-Tech is producing better results for my car than your G-Tech is for yours. This just isn't likely to be representative of reality.

Hmm.

. png

Peter G.'s BMW pages

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