0-60 issues
Thread Starter
Pro
Joined: Jun 2002
Posts: 580
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From: Boise ID
0-60 issues, 1/8 mile
Ok first I'm not a road racer, but I spent some time working on my launches on my favorite deserted road.
Tires: F1 Supercars
Tranny/Rear: 6-Speed/3.42
On my launch about 2700 rpm seems to be the it. Above that and the tires just smoke. Below 2500 and I get the bog then go.
I can't seem to get under around 4.3 seconds. I am using a G-tech. I can consistenly hit 4.3, 4.28, 4.32.
My 1/4 mile was 12.85 @113
besides jumping to drag radials is there anything that (tips and tricks) to getting a better time?
What 0-60 and 1/4 mile should I be expecting with 520 rwhp?
RUN1
0-30 : 1.68s
0-60 : 4.28s
1/8 Mile : 8.35s / 77.1 mph
60ft : 2.0
RUN2
0-30 : 2.10
0-60 : 4.6s
60 ft : 2.15
1/8 Mile : 8.47s /88mph
1/4 Mile : 12.85 /113.1mph
[Modified by brianw21, 10:20 PM 5/4/2004]
[Modified by brianw21, 10:36 PM 5/4/2004]
Tires: F1 Supercars
Tranny/Rear: 6-Speed/3.42
On my launch about 2700 rpm seems to be the it. Above that and the tires just smoke. Below 2500 and I get the bog then go.
I can't seem to get under around 4.3 seconds. I am using a G-tech. I can consistenly hit 4.3, 4.28, 4.32.
My 1/4 mile was 12.85 @113
besides jumping to drag radials is there anything that (tips and tricks) to getting a better time?
What 0-60 and 1/4 mile should I be expecting with 520 rwhp?
RUN1
0-30 : 1.68s
0-60 : 4.28s
1/8 Mile : 8.35s / 77.1 mph
60ft : 2.0
RUN2
0-30 : 2.10
0-60 : 4.6s
60 ft : 2.15
1/8 Mile : 8.47s /88mph
1/4 Mile : 12.85 /113.1mph
[Modified by brianw21, 10:20 PM 5/4/2004]
[Modified by brianw21, 10:36 PM 5/4/2004]
Pro
Joined: Oct 2003
Posts: 583
Likes: 40
From: Sacramento
Re: 0-60 issues (brianw21)
Those numbers look pretty good to me. 
I have a G-tech too and found that prior to installing my new blower that around 2700 RPM's was optimal too. I am still getting used to the new blower and only had a few runs, but your time is still way better then mine are.
I have a G-tech too and found that prior to installing my new blower that around 2700 RPM's was optimal too. I am still getting used to the new blower and only had a few runs, but your time is still way better then mine are.
Racer
Joined: Nov 2003
Posts: 451
Likes: 1
From: Ringgold Ga.
Re: 0-60 issues (Bigben)
With your HP you should be running more like 11.85 in the 1/4 not 12.85. I have the A&A set up and Kooks 1 7/8 headers 551 hp 496 tq. Have not been to the track yet, but i have raced my freinds 99FRC with H&C and pulled him pretty good. He runs 11.8 in the 1/4.
Melting Slicks
Joined: Dec 2002
Posts: 2,480
Likes: 62
From: Middletown DE
Re: 0-60 issues (rplaster)
I have a Gtech also- i cannot launch my car and only manage in the 5.0's.... for 0-60, but for 1/4 i hit a 13.1 (that's off) but at 130mph...
I am thinking mid to low 11's should not be a problem.
I am thinking mid to low 11's should not be a problem.
Thread Starter
Pro
Joined: Jun 2002
Posts: 580
Likes: 0
From: Boise ID
Re: 0-60 issues, 1/8 mile (brianw21)
I guess I just expected to see sub 4 second 0-60 times... GM claims that the Z06 can do it in 4.0 I figured with 520 some HP I should be able to beat it.
Now I do understand that it was a country road, and not a prepped drag surface.. maybe that has a lot more to do with it than I think.
Now I do understand that it was a country road, and not a prepped drag surface.. maybe that has a lot more to do with it than I think.
Pro
Joined: Oct 2003
Posts: 583
Likes: 40
From: Sacramento
Re: 0-60 issues, 1/8 mile (brianw21)
Brian,
Most of us will likely never run numbers like the manufacturers claim. Those drivers are professionals, driving under ideal circumstances. Doing hard launches and shifting without the clutch or letting up on the gas. My soft launch recently with 480 RWHP and 470 RWTQ was 5.3 I think I can get it down a bit with a launch around 2700-3000. Other then that I think realistically we would need better tires and a lot more practice to get much quicker.
Most of us will likely never run numbers like the manufacturers claim. Those drivers are professionals, driving under ideal circumstances. Doing hard launches and shifting without the clutch or letting up on the gas. My soft launch recently with 480 RWHP and 470 RWTQ was 5.3 I think I can get it down a bit with a launch around 2700-3000. Other then that I think realistically we would need better tires and a lot more practice to get much quicker.
Burning Brakes
Joined: May 2002
Posts: 818
Likes: 0
From: The Nether Region IL
Re: 0-60 issues, 1/8 mile (brianw21)
Brian-
Do you have to make the 1 to 2 shift? I don't know what your redline is but with 3.42s, I'd think you can come close to 60 in first- right?
ps- I just bought nittos to run all the time in prep for the A&A ATI set up. You might consider them too as a stickier tire that will still hold up fairly well in the turns.
Do you have to make the 1 to 2 shift? I don't know what your redline is but with 3.42s, I'd think you can come close to 60 in first- right?
ps- I just bought nittos to run all the time in prep for the A&A ATI set up. You might consider them too as a stickier tire that will still hold up fairly well in the turns.
Thread Starter
Pro
Joined: Jun 2002
Posts: 580
Likes: 0
From: Boise ID
Re: 0-60 issues, 1/8 mile (bandit_99)
Redline in first is like 53mph, just short of not having to shift. I know the Ford GT-40 shifts right at 62mph and that is how they could get such a low #.
I am using the clutch and letting off the throttle a smidge. But I have no desire to ruin my tranny or synchro's.
I am using the clutch and letting off the throttle a smidge. But I have no desire to ruin my tranny or synchro's.
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Drifting
Joined: Jan 2002
Posts: 1,731
Likes: 1
From: Bay Area CA
Re: 0-60 issues, 1/8 mile (brianw21)
Majority of Magazine times are done with a radar gun, not at a real track.
You should be a lot more concerned about your mph in the 1/4 rather than your ET. Et will be more influenced by traction, or lack of, where as mph shows power. You should be around 125mph traps.
You should be a lot more concerned about your mph in the 1/4 rather than your ET. Et will be more influenced by traction, or lack of, where as mph shows power. You should be around 125mph traps.
Melting Slicks
Joined: Mar 2002
Posts: 2,931
Likes: 2
From: Tx
Re: 0-60 issues, 1/8 mile (Red C5)
I think some of it is related to tuning. It is often tough to get all the fat holes out of the transition on a part throttle launch.
This is something I'm just starting to explore and I don't think many people understand it yet.
This is something I'm just starting to explore and I don't think many people understand it yet.
Pro
Joined: Oct 2003
Posts: 583
Likes: 40
From: Sacramento
Re: 0-60 issues, 1/8 mile (QuickSilver2002)
I think some of it is related to tuning. It is often tough to get all the fat holes out of the transition on a part throttle launch.
This is something I'm just starting to explore and I don't think many people understand it yet.
This is something I'm just starting to explore and I don't think many people understand it yet.
Supporting Vendor
Joined: Jul 2003
Posts: 6,486
Likes: 2
From: http://www.mphparts.com 800-364-1975
Re: 0-60 issues, 1/8 mile (QuickSilver2002)
I think some of it is related to tuning. It is often tough to get all the fat holes out of the transition on a part throttle launch.
This is something I'm just starting to explore and I don't think many people understand it yet.
This is something I'm just starting to explore and I don't think many people understand it yet.
I pledged long ago to never explore fat holes.
Melting Slicks
Joined: Mar 2002
Posts: 2,931
Likes: 2
From: Tx
Re: 0-60 issues, 1/8 mile (diynoob)
I think some of it is related to tuning. It is often tough to get all the fat holes out of the transition on a part throttle launch.
This is something I'm just starting to explore and I don't think many people understand it yet.
I pledged long ago to never explore fat holes.
This is something I'm just starting to explore and I don't think many people understand it yet.
I pledged long ago to never explore fat holes.
I'm just finding that the maf gets pretty inaccurate when you first launch the car and the RPMs drop. The PCM seems to use VE to calc airflow more when the throttle transitions at low RPMs.
This stuff is just starting to get figured out.
[Modified by QuickSilver2002, 10:37 PM 5/5/2004]
Melting Slicks
Joined: Dec 2003
Posts: 2,334
Likes: 11
From: las vegas nv.
Re: 0-60 issues, 1/8 mile (QuickSilver2002)
With a trap speed of only 113 mph there is no way you are making 525 rwhp! If that is what the dyno said it lied, your stock Z06 goes 113/114 mph! I suggest something is wackey in wakersville! 
Melting Slicks
Joined: Oct 2002
Posts: 2,200
Likes: 0
Re: 0-60 issues, 1/8 mile (diynoob)
I think some of it is related to tuning. It is often tough to get all the fat holes out of the transition on a part throttle launch.
This is something I'm just starting to explore and I don't think many people understand it yet.
I pledged long ago to never explore fat holes.
This is something I'm just starting to explore and I don't think many people understand it yet.
I pledged long ago to never explore fat holes.
..you guys are killing me!!!!!
Melting Slicks
Joined: Mar 2002
Posts: 2,931
Likes: 2
From: Tx
Re: 0-60 issues, 1/8 mile (bobby777)
With a trap speed of only 113 mph there is no way you are making 525 rwhp! If that is what the dyno said it lied, your stock Z06 goes 113/114 mph! I suggest something is wackey in wakersville!
Supporting Vendor
Joined: Jul 2003
Posts: 6,486
Likes: 2
From: http://www.mphparts.com 800-364-1975
Re: 0-60 issues, 1/8 mile (QuickSilver2002)
Maybe I should have said rich holes.
I'm just finding that the maf gets pretty inaccurate when you first launch the car and the RPMs drop. The PCM seems to use VE to calc airflow more when the throttle transitions at low RPMs.
This stuff is just starting to get figured out.
[Modified by QuickSilver2002, 10:37 PM 5/5/2004]
I'm just finding that the maf gets pretty inaccurate when you first launch the car and the RPMs drop. The PCM seems to use VE to calc airflow more when the throttle transitions at low RPMs.
This stuff is just starting to get figured out.
[Modified by QuickSilver2002, 10:37 PM 5/5/2004]
OK, that makes total sense. I agree with you -- it seems that from a dead launch both of my C5s have "bogged" a little more in the low RPMs than other manual cars I've owned. Even if you get the car moving at 5MPH and then nail it, the car seems to move better than trying to launch from a dead stop at similar RPMs.
Race Director
Joined: Nov 2003
Posts: 16,065
Likes: 4,148
From: Bergen county NJ
Re: 0-60 issues, 1/8 mile (diynoob)
Drop your revs on the launch even further and feather the clutch more ...
wait longer before hitting the hammer so hard..
Heat the tires up before the launch..
Your times will improve.
and wait till summer when the tires will stick more..
If the temps are below 70 degrees..thats probably the reason...
IMO
wait longer before hitting the hammer so hard..
Heat the tires up before the launch..
Your times will improve.
and wait till summer when the tires will stick more..
If the temps are below 70 degrees..thats probably the reason...
IMO
Burning Brakes
Joined: Jan 2004
Posts: 1,158
Likes: 6
From: Winter Springs Fla
Re: 0-60 issues, 1/8 mile (JerriVette)
Get rid of the G-tech , get a set of 18" BFG drag radials and hit the nearest 1/4 mile track ,, anything less is just guessing .
With over 500 whp and a set of DR's @18-20 psi you will be tickeling the 10's once you get used to launching the car , no problem .
With over 500 whp and a set of DR's @18-20 psi you will be tickeling the 10's once you get used to launching the car , no problem .
Le Mans Master
Joined: Feb 2004
Posts: 5,482
Likes: 1
From: Living the Taxation Dream Indiana
Re: 0-60 issues, 1/8 mile (brianw21)
This is a little confusing but I will do my best. The magazines use a radar gun when testing 0-60 and 1/4 mile times. The G-Tech uses an onboard accelerometer that measures differences in acceleration forces from start to finish and has an onboard chonometer to reference accleration rates to time. It then calculates a number of parameters from the given information including what you programed in as the weight of the car to be. Being on an open road, many other vairables can wreck havoc as well including but not limited to wind, grade of the road, temp, altitude, surfacing of the road, and even placement of the G-Tech on the dash.
So what does this mean The bottom line is that the the G-Tech is very precise, but not always accurate. I found on mine when running at a dragstrip that is whas always about .3-.5 seconds slower than the timeslip was showing. IMHO the horsepower reading on the G-Tech is junk.
The G-tech is good though at telling you whether a mod made much of a difference or not, or testing lateral-g's in a skidpad test. Just have to do your best to keep all of the other variables equal.
Hope this helped :flag
So what does this mean
The bottom line is that the the G-Tech is very precise, but not always accurate. I found on mine when running at a dragstrip that is whas always about .3-.5 seconds slower than the timeslip was showing. IMHO the horsepower reading on the G-Tech is junk. The G-tech is good though at telling you whether a mod made much of a difference or not, or testing lateral-g's in a skidpad test. Just have to do your best to keep all of the other variables equal.
Hope this helped :flag