Site Update: Performance Numbers Added for 2004 XLR

[Rob]

Performance numbers for the 2004 Cadillac XLR have been added to the 2004 Model Center:

XLR Net | Model Center | 2004 Cadillac XLR Performance Review

[BusaMan]

Does anyone have a handle on what the top speed is for a base (stock) XLR? Are there software limits on it?

My motorcycle (Suzuki Hayabusa) came from the factory with a government-mandated top speed of 300 kph (186 mph), and the timing was retarded in the first 2 gears by the ECU. It had no hardware limitations, and was still geared for >200mph. There (thankfully) existed work-arounds that spoofed the ECU and avoided the limitations. (Heh, Heh...)

What I'm wondering is if there are any such "soft" limits on our cars?

Tim

I'm SURE that anyone with such experience only drove that fast on an approved track...

[mtrocket]

Originally Posted by BusaMan

Does anyone have a handle on what the top speed is for a base (stock) XLR? Are there software limits on it?

My motorcycle (Suzuki Hayabusa) came from the factory with a government-mandated top speed of 300 kph (186 mph), and the timing was retarded in the first 2 gears by the ECU. It had no hardware limitations, and was still geared for >200mph. There (thankfully) existed work-arounds that spoofed the ECU and avoided the limitations. (Heh, Heh...)

What I'm wondering is if there are any such "soft" limits on our cars?

Tim

I'm SURE that anyone with such experience only drove that fast on an approved track...

I believe all US autos are limited to 155MPH; there are ways to remove the limit, but I haven't looked into doing that... the car is fast enough as it is for me.
The fastest I've had my base has been 141MPH. It was still climbing, albeit rather slow, but I backed off because the front end was getting a tad "floaty". I've since put on the rear stabilizer, but haven't had the opportunity to test the speed (as of yet... anyway) ---

[GizmoQ]

Originally Posted by BusaMan

What I'm wondering is if there are any such "soft" limits on our cars?

Almost any good tuner can remove the speed limiter. My guy also adjusted the shift points in performance mode, modified the retard and fuel flow to match my bigger intake, and modified the rev limits.

All that said an intake and a tune will yield another 25-50HP and removing the speed limiter during the tune takes an extra minute or two.

[graytoad]

[QUOTE=mtrocket;36162] .......the front end was getting a tad "floaty". ---[/QUOT


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