Fastest you've been in your LS4?
 

145 for me racing a Z, I guess their 100+ is bad too, cause I got the jump and we held even from 40... He had at least aftermarket exhaust and a passenger. I just had my CAI and cutout open.

Also, I had my '87 FC up to 140, didn't think it would do it, lol.

And on another side note, my step-dad has had his G8 at 163, he said it had plenty more but cross winds were making the car a little squirrelly.

135, shut down cuz the next part of the road is pothole central.

I maxed out the speedo (just beyond 140) and was smart enough (that's irony right there...no one is smart and doing 140 on public highways) to know that the traffic up ahead would be in my engine compartment very soon thereafter. I often hit 110 but don't need to go any faster.

120ish i think.....i always get the feeling a cop will be waiting for me so i back off :(

225km/h

158 flew past a cop going the other way, didnt turn around. Felt like it had more in but then that happened <-- Was recorded on my gps until i deleted it when pulled over months later, for speeding what else? haha.

I've hit 140 once. Haven't come close to it since

I have only snuck past 100. The older i get, the more worried about getting pulled over i get. If it was 10 years ago, i would have had it maxed out within the first few hours of owning it. :cool:

115ish

145 mph or whatever the stock computer tune shuts you down at. Nice straight country road.

90 - 95 for me. Raced a GTP and won so I just shut it down. This was last year.

-Mike

i was at the the 140 mark racing a new 335i. it was super late and his car still had the temp in the window but i beat it 2 out of 3. cars were pulling to the sides when they saw us coming. my car felt like it had more left but i too was worried about cops. even though i doubt its any easier to get away with doing 140 than it is getting out of doing 150 in a 55.

I've had mine up to 130 a couple of times and that was fast enough for me.

I had mine up to 140 when I first got the car, but that was on a private road

Cruised happily at 135:)

140 mph once or twice. Thats fast enough because if something ever stepped out or blew a tire it would be quite bad.

A little over 145. The car seemed to have more but didnt seem that stable. Ive been in 350 irocs and Formulas with the 145 and 140 speedometers buried and they seemed much more stable. I doubt I will do it again, just seeing what it had.

about 260km/h, had a friends 300zx twinturbo going wayyy over 350km/h within hours of driving it off the lot, but never again lol

same here. Ive gotten up to 125 mph

163 a few times, i havent tried to max it out since my new intake, i will have to try it when i get my car back cause the headers and new cam should help :)