deadcities

iTrader: (4)

Exactly. A lot of people seem to think because their car can make it to 150-160, and still have some RPM left before they had to let out, that they can make it to 170, etc. They don't realize that the amount of power required to gain each mile per hour starts becoming almost exponential at that point, because of aerodynamics.

redls1bird

iTrader: (1)

RPM's have nothing to do with your speedo accuracy. Increased speed will exagerate a speedo that is off, because if its off 5 %, at 60 thats 3 mph, at 120 its 6 mph.

My speedo is dead on at both 75, and 110 according to my in car GPS. Unless I have a faulty component, it should be just as accurate at 155 as the rest of them.

transam98989898

The guy I bought my car from supposedly had the speedo recalibrated with a tune when he added 3.73's. I thought my quarter mile time was going to suck because my guage said I trapped barely over 100. My slip said 113.xx so I was relieved. Still, don't you think that's too far off for a correct recalibration?

theycallmealex89

i had heard that with t-tops off going extremely fast like 125+ or w/e could potentially blow your rear hatch out. is that true? i just remember hearing it, and never ever thinking about doing it. idk if this is true or not, but man. that would suck. your hauling *** at 140 then you hear, *pop*.... *SHATTER*.... and then you would wonder why your car feels so light. only untill you slowed to a reasonable "i can look behind me now" speed would you be able to tell your about to kick your own ***.

SOMbitch

iTrader: (8)

Mine didn't blow out on a 145 burst.

Spink

iTrader: (1)

I've been to 135-140 a few times with my tops off and I still have my back window. Make sure you don't have any empty fast food bags or anything in the bag seat though. those things sting at 130mph. Scared the **** out of me. I thought I got attacked by a bird or somethin.

cochran191

I say 175 is perfectly doable for a bone stock LS1, my 3.4L stock firebird did 145 gps, so I would say that 30 more mph with over 100 more HP is very doable.

Sunset'01Z

iTrader: (10)

165 is about all they will do without heads and cam. with good heads and a cam some guys have seen low 170's. to reach beyond that takes a lot of power, weight reduction, and gearing.

BlkBird2000

iTrader: (10)

I'm young and i'm with you. I'm 19 and have gone 140 in my car. That's the last time for that. I like getting to atleast 110 fast. 30-110 should be enough time for someone to win a race. If they're dead even, oh well, it's a tie! But yea I like to get up and go quick. That's why I have 4:10s.

KENS_SS_4

In 01 cars stock vette was drag limited = 179, Z06 vette = 172 (brake cooling vent drag increase was the cause) chevy Camaro = 168

406malibu

i know old thread... but... 145 on a 3.4 stock, i couldnt hit that with either of my 3.8's modified.... seriously what are you smokin?

bricez28

i have a lt1 and i pinned the speedo. never again. cars doing 80 seem like theyre going still. scary ****. rather do 0-60 in a few seconds.

406malibu

yea... i have no desire to peg the speedo in mine, unless its on a track. the thought of someone pulling over because they didnt see me coming, or a blow out on my R rated tires scares the **** outa me... (not that i could do over 118, BECAUSE of my R rated tires... damn speed limiter)

Gordon0652

iTrader: (4)

I wanna guess a Stock F-body M6 prob could hit 160-165 and thats about it. i have a hard i time believing that it could hit 170. A stock A4 F-body might touch 160 maybe with a wind pushing it?

Vicinity

iTrader: (7)

I recently got permission to top out on a runway on a base, but I don't want to do it until next year when I can afford to complete H/C/I/E so I can really push it. I want 170. Probably won't like going fast after that, good to get it out of my system on a runway then a freeway.

02Z28LS1

iTrader: (2)

why would you not like going fast after that? i love every time i'm able to hit really high speeds....i've hit 150-ish a couple times, and 120 - 140 numerous times....and love every second of it.

wabmorgan

I saw a piece on TV several years ago where they had someone on a nascar track in a convertible going 55mpg. They had one of the race cars pass the convertible @ 200+MPH. The race passed the convertible so quickly.... if you blinked... you would have missed it.

I've done around 130ish in mine.... more than enough.... and I'm not planning on doing that again either. You get caught doing triple digit speeds... they will put you under the jail... unless you are very lucky. If you have an accident at that kind of speed.... YOU ARE DEAD!!!!!!!!!!!!

sidewayz28

iTrader: (24)

140+ comes up quick in my car... stock i think i hit 130 mph... and that was enough.

ae13291

iTrader: (8)

i have accedentally hit 125ish without even knowing, after a 100 these cars keep accelerating quick!! but i will never do it again! its so wrong, if u crash at those speeds, u will be lucky to be found alive

Spiers

iTrader: (7)

I went 150 with the t-tops off...didn't take too long.