3rd gear is good up to what mph?
Thread Starter
Teching In
Joined: Sep 2002
Posts: 34
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From: NY
3rd gear is good up to what mph? I blasted off from an on ramp by some jackass that wouldn't move over to let me in and before I knew it I was a little over 90 in 3rd. Damn, these LS1 powered cars are beasts. Just wanted to make sure I didn't harm the car. TIA.
TECH Senior Member
Joined: Nov 2001
Posts: 9,246
Likes: 3
From: Troy, AL
Re: 3rd gear is good up to what mph? Harm the car? No chance.
Your third gear ratio is 1.30. Assuming stock height tires, stock gearing, and a stock rev limiter (you do have one of these you know to keep you from hurting anything) of 6250 you could go 107 MPH. You were only turning about 5240 if you were going 90 MPH in third.
Your third gear ratio is 1.30. Assuming stock height tires, stock gearing, and a stock rev limiter (you do have one of these you know to keep you from hurting anything) of 6250 you could go 107 MPH. You were only turning about 5240 if you were going 90 MPH in third.
Re: 3rd gear is good up to what mph? im guessing your talking manual
mine is more like 103 (across traps in 3 on the limiter)
im sure what i did is very common, with an ok stock ls1 you just barely have to get it into 4th to trap 106 or so mph
you should have stayed in it. <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" /> maybe time to get a shiftlight if you are worried about tagging the limiter.
mine is more like 103 (across traps in 3 on the limiter)
im sure what i did is very common, with an ok stock ls1 you just barely have to get it into 4th to trap 106 or so mph
you should have stayed in it. <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" /> maybe time to get a shiftlight if you are worried about tagging the limiter.
TECH Senior Member
Joined: Nov 2001
Posts: 9,246
Likes: 3
From: Troy, AL
Re: 3rd gear is good up to what mph? According to his sig I'm guessing he's an M6 too! <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" />
"02 Sebring Silver Camaro SS #8361
345 HP CME SLP Pkg. w/ Chrome ZR-1s
6-speed, fully loaded except ASR."
Remember, what your timeslip says is you MPH and what your MPH actually is across the line are two different things. The slip tells you your average speed over the last 60' of the track.
Also, speedometers and actual tire sizes vary.
<small>[ December 06, 2002, 12:02 AM: Message edited by: Colonel ]</small>
"02 Sebring Silver Camaro SS #8361
345 HP CME SLP Pkg. w/ Chrome ZR-1s
6-speed, fully loaded except ASR."
Remember, what your timeslip says is you MPH and what your MPH actually is across the line are two different things. The slip tells you your average speed over the last 60' of the track.
Also, speedometers and actual tire sizes vary.
<small>[ December 06, 2002, 12:02 AM: Message edited by: Colonel ]</small>
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Re: 3rd gear is good up to what mph? </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by stang killer:
<strong>So whats the fastest you can go in 6th gear <img border="0" alt="[Burnout]" title="" src="graemlins/burnout.gif" /> </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Someone correct me if I'm wrong but you don't reach your top speed in 6th gear, you need to stay in 5th.
<strong>So whats the fastest you can go in 6th gear <img border="0" alt="[Burnout]" title="" src="graemlins/burnout.gif" /> </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Someone correct me if I'm wrong but you don't reach your top speed in 6th gear, you need to stay in 5th.
Thread Starter
Teching In
Joined: Sep 2002
Posts: 34
Likes: 0
From: NY
Re: 3rd gear is good up to what mph? Thanks guys. Yes, horsepower is fun. <img border="0" alt="[Burnout]" title="" src="graemlins/burnout.gif" />
Now if only this snow can disappear as fast as an LS1 in the quarter mile, I'll be happy. <img border="0" alt="[Camaro]" title="" src="graemlins/camaro.gif" />
Now if only this snow can disappear as fast as an LS1 in the quarter mile, I'll be happy. <img border="0" alt="[Camaro]" title="" src="graemlins/camaro.gif" />
Re: 3rd gear is good up to what mph? I'd have to check the math (I was kinda busy at the time) but I believe at 153 (indicated mph) I was turning about 5300 RPM in 5th (I won't say that I spent alot of time staring at the tach, I was looking elsewhere). 6th gear is geared for something around (or even above) 230 mph and you will need a few hundred extra HP to consider testing your rev limiter in 6th....Guess I need a challenge....lol
FYI When I last checked the math (based on 21.5 square feet of frontal area and a drag coefficient of .31) it takes 377 HP at the rear wheels to overcome the aerodynamic drag that the car is fighting to get to 200 mph. This all changes somewhat once you factor in tire drag and gear ratios (and the driveline losses from those ratios). I dynoed my 2002 Z stock (with a lid) and made 299.7 hp and 317 ft lbs in 4th gear, 3rd and 5th both cost me about 15hp and 13 ft lbs and I'm sure 6th would be worse than that (at 158 mph on the dynojet, I was making 285 hp to the wheels....and some evil noises....). Not that there are too many other "car geeks with calculators" like me....but interesting info (if anyone really cares....lol). Just thought I'd throw that out there.....
FYI When I last checked the math (based on 21.5 square feet of frontal area and a drag coefficient of .31) it takes 377 HP at the rear wheels to overcome the aerodynamic drag that the car is fighting to get to 200 mph. This all changes somewhat once you factor in tire drag and gear ratios (and the driveline losses from those ratios). I dynoed my 2002 Z stock (with a lid) and made 299.7 hp and 317 ft lbs in 4th gear, 3rd and 5th both cost me about 15hp and 13 ft lbs and I'm sure 6th would be worse than that (at 158 mph on the dynojet, I was making 285 hp to the wheels....and some evil noises....). Not that there are too many other "car geeks with calculators" like me....but interesting info (if anyone really cares....lol). Just thought I'd throw that out there.....
