Matt B

Is there any reason a stock Z28 shouldn't be able to go 150+ mph? Is there any kinda of speed regulation? Thanks,

Matt

Nightclaw

I think the PCM has a fuel-cutoff programmed at 165. Many people here have gone well in excess of 160 MPH. I'm not one of 'em, but I have been upwards of 145 in stock trim. <img src="images/icons/grin.gif" border="0"> Most bone-stock F-bodies will do 145+ easily. <img src="images/icons/smile.gif" border="0">

Toxic Texan

155+ here, but I used the HPPIII to take out the speed limiter. <img src="images/icons/grin.gif" border="0">

Patrick G

iTrader: (14)

Speed limiter is between 158-161 on F-bodies.

Wicked Ls1

I've been to 160 a few times.

LS1Formula98

iTrader: (2)

I have only been up to 130. I heard the cutoff point is 159. But obviously thats not true since some of you have done 160.

mike400hp

I have had my 2001 Z28 6-speed up to exactly 160MPH, verified by a GPS reciever that was updating every 9 feet. It was still pulling slowly and I bet it would have hit the rev limiter in 5th gear. I picked a bad night to do this on because the road I was on was really foggy and at 160 I couldn't see anything in time even to think about stopping. Oh yeah, I did this when the car had about 2200 miles on it and it was ALL STOCK. The problem you will face when passing about 165MPH is that you will have to shift to 6th gear. If you have stock gearing. Once you are in 6th gear the engine will not be in the power band enough to keep you at that speed, much less accelerate you any faster.

[ November 21, 2001: Message edited by: mike400hp ]</p>

3GROC

rev limiter in 5th is NICE!!!!!!!!!!!!!!!
I been htere once..never again
was good as hell..I have the hiccups now.

later

Chris

Edited for language. <img src="images/icons/smile.gif" border="0">

[ November 22, 2001: Message edited by: Colonel ]</p>

Taco

iTrader: (1)

I've been 151, once, before 4.10's, don't know what it'd do now, but I have a suspicion that it might actually pull in 6th gear now. I think close to 165 would be a good estimate. Maybe an update soon.....

Taco

Dick Cabasa

No you won't pull 6th. Not even with 4:10's.
Matter of fact, 4:10's are the worst possible gears for max MPH. You will hit the rev limiter in 5th at ~152. Then bog into 6th and lose speed. 3:73 is the optimum gear for stock engined cars for peak MPH. Easily hit the limiter.

Speed limiter is 162mph, confirmed by Chevy, and tested on a dyno. It does fuel shutoff much like the rev limiter. Some cars have 118mph, depending on options.

Stock engined/gears cars don't really need the limiter, as the gearing won't get into the peak.

You'll hear people saying their stock car will hit the limiter easily. They are full of ****.

99taws6

iTrader: (2)

I have hit mine many times.. stock form also... check my site out for pics and video....... Not all stock Z's can pull that speed, cause not all Z's come with Z rated tires.......

www.99taws6.f2s.com

QUASAR

iTrader: (6)

99taws6, you are stationed in germany right? Thats so awsome that you can top that beast out on the 'bahn <img src="images/icons/grin.gif" border="0"> Great vid too.

I believe the six speed cars can do 160 stock. I have been 145 in a stock A4 ta, and it had more left in it. The firebird ram-air is good for like 1lb of boost at that speed. Maybe even more.

<img src="images/icons/wink.gif" border="0">

99taws6

iTrader: (2)

Yes, I am in Germany.. I want to top it out on the bahn with the help of a hypertech, GPS and TNT before I leave...

QUASAR

iTrader: (6)

[quote]Originally posted by 99taws6:
...and TNT before I leave...<hr></blockquote>

<img src="images/icons/grin.gif" border="0">

<img src="graemlins/burnout.gif" border="0" alt="[Burnout]" />
<img src="graemlins/burnout.gif" border="0" alt="[Burnout]" />
<img src="graemlins/burnout.gif" border="0" alt="[Burnout]" />
<img src="graemlins/burnout.gif" border="0" alt="[Burnout]" />

99taws6

iTrader: (2)

that will be my TNT success story.....

CamaroSS_2002

iTrader: (4)

I am curious to see if anyone here has a 98+ Fbody with the 200mph speedo and/or they've hit 200mph

<img src="graemlins/burnout.gif" border="0" alt="[Burnout]" />

LiquidSnake

[quote]Originally posted by Matt B:
<strong>Is there any reason a stock Z28 shouldn't be able to go 150+ mph? Is there any kinda of speed regulation? Thanks,

Matt</strong><hr></blockquote>
180 somethink over here <img src="images/icons/wink.gif" border="0">

99taws6

iTrader: (2)

[quote]Originally posted by CamaroSS_2002:
<strong>I am curious to see if anyone here has a 98+ Fbody with the 200mph speedo and/or they've hit 200mph

<img src="graemlins/burnout.gif" border="0" alt="[Burnout]" /> </strong><hr></blockquote>

My friend Jessie has one in his car.. We are both installing TNT kits right now.. When we get it done we will do a autobahn run or 2... We both have full suspensions so it should handle ok..... I will keep everyone posted....

SSLoneStar

I have hit the Rev Limit in 5th a few times <img src="graemlins/fluffy.gif" border="0" alt="[Fluffy]" /> ,I would love to know what the actual speed at that point is ?

SS/LS

[quote]Originally posted by Matt B:
<strong>Is there any reason a stock Z28 shouldn't be able to go 150+ mph? Is there any kinda of speed regulation? Thanks,

Matt</strong><hr></blockquote>