0 to 60
Melting Slicks
Joined: Jun 2016
Posts: 2,845
Likes: 518
From: Eastern WA
The Z51 and GS have lower gearing in rear diff. That's why they have faster 0-60 and worse fuel mileage. The GS has wider tires which is supposed to result in faster 0-60, but that probably depends on some other factors.
Last edited by djnice; Apr 7, 2017 at 02:49 PM.
Thread Starter
Intermediate
Joined: Feb 2017
Posts: 42
Likes: 0
Melting Slicks
Joined: Jun 2016
Posts: 2,845
Likes: 518
From: Eastern WA
A couple times in the past I had 4.2 seconds with some wheel spin.
Last night it was 60F out and the car was running good. Did some long fish tail burnouts in 2nd leaving stop lights, etc. So I thought good time to try the 0-60.
Well first launch I had some minor spin and wheel hop and got a 4.6. Second time less wheel hop and got a 4.9. What gives?
Last night it was 60F out and the car was running good. Did some long fish tail burnouts in 2nd leaving stop lights, etc. So I thought good time to try the 0-60.
Well first launch I had some minor spin and wheel hop and got a 4.6. Second time less wheel hop and got a 4.9. What gives?
Burning Brakes
Joined: Jan 2013
Posts: 906
Likes: 62
From: Seattle WA
A couple times in the past I had 4.2 seconds with some wheel spin.
Last night it was 60F out and the car was running good. Did some long fish tail burnouts in 2nd leaving stop lights, etc. So I thought good time to try the 0-60.
Well first launch I had some minor spin and wheel hop and got a 4.6. Second time less wheel hop and got a 4.9. What gives?
Last night it was 60F out and the car was running good. Did some long fish tail burnouts in 2nd leaving stop lights, etc. So I thought good time to try the 0-60.
Well first launch I had some minor spin and wheel hop and got a 4.6. Second time less wheel hop and got a 4.9. What gives?
Burning Brakes
Joined: Jan 2013
Posts: 906
Likes: 62
From: Seattle WA
Hey guys in general do remember that mag test include rollout on 0-60, our PDR systems do not. In RWD big HP that rollout is going be at least .1 probably .2-.3. So if you hit a 3.5 its probably 3.3ish by traditional testing equipment. Also if your going to go out and really try for a good 60 try and get tires warm and probably drop the PSI down a little in your tires.
Using LC in track/sport1 I consistently get 3.4-3.5 on MPSS tires. When I put on my cups I get 3.2-3.3. I need to try aggressively rolling into the throtte more as I have heard that can net the best times.
Using LC in track/sport1 I consistently get 3.4-3.5 on MPSS tires. When I put on my cups I get 3.2-3.3. I need to try aggressively rolling into the throtte more as I have heard that can net the best times.
Melting Slicks
Joined: Sep 2009
Posts: 2,180
Likes: 233
From: Minnetrista Minnesota
Hey guys in general do remember that mag test include rollout on 0-60, our PDR systems do not. In RWD big HP that rollout is going be at least .1 probably .2-.3. So if you hit a 3.5 its probably 3.3ish by traditional testing equipment. Also if your going to go out and really try for a good 60 try and get tires warm and probably drop the PSI down a little in your tires.
Using LC in track/sport1 I consistently get 3.4-3.5 on MPSS tires. When I put on my cups I get 3.2-3.3. I need to try aggressively rolling into the throtte more as I have heard that can net the best times.
Using LC in track/sport1 I consistently get 3.4-3.5 on MPSS tires. When I put on my cups I get 3.2-3.3. I need to try aggressively rolling into the throtte more as I have heard that can net the best times.
Burning Brakes
Joined: Jan 2013
Posts: 906
Likes: 62
From: Seattle WA
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Burning Brakes
Joined: Jan 2013
Posts: 906
Likes: 62
From: Seattle WA
Melting Slicks
Joined: Jun 2016
Posts: 2,845
Likes: 518
From: Eastern WA
I was launching with traction control off and not using launch control.
Elevation is 2400 feet and road surface is rough.
What bothered me is why it went to 4.9 on the second launch?
I suppose lower elevation helps.
Last edited by djnice; May 5, 2017 at 01:22 AM.
Racer
Joined: Apr 2017
Posts: 461
Likes: 327
From: PDX
I really want to give it a real attempt, but I just don't have a good place without taking it to the track.
If I can pull off a 4.5 (like I did a couple weeks back with cold tires) without giving it my best attempt, it seems that 3.9 should be possible...assuming the dash timer is accurate.
I haven't tried launch control yet, traction control was left on, and my times were EASILY attainable without even going wide open throttle. You should try it with all the nannies enabled and see what time you get.
Last edited by STINGmole; May 5, 2017 at 02:21 AM.
Melting Slicks
Joined: Jun 2016
Posts: 2,845
Likes: 518
From: Eastern WA
Yeah, I will keep messing with it. I had 4.2 when it was cold and not trying hard and getting lots of spin so I thought 4.0 or less would come easily, but the harder I try it seems to get worse.
Burning Brakes
Joined: Jan 2013
Posts: 906
Likes: 62
From: Seattle WA
try lowering your tire pressure in the rear to about 28 psi cold. On the street I would keep practicing with the launch control you'll be able to get much more consistency. I like track and sport 1 for the street. I find on the street trying to launch with TC off and a high rpm (like 2400) just ends up with too much tire spin.
Le Mans Master
Joined: Aug 2005
Posts: 5,375
Likes: 327
From: CA.
St. Jude Donor '13-'14-'15
Anyone with their own tuning software or those who have altered their rear rire heights without re-tuning can trick the 0-60 MPH timed readings to read whatever they want them to --I simply changed my stock tire height to read 29.50" and I clicked off an amazing 0-60 time of 3.0 !!!
---So when people post sub 4 second times on a stock C7 auto I would want them to take a poly graph test !! LOL
---So when people post sub 4 second times on a stock C7 auto I would want them to take a poly graph test !! LOL