Quickest Lincolns of Distinction - DISCUSSION
- Thread starter driller
- Start date
jbird97
Registered
That would be the rev limiter. Apparently my tires are an inch shorter in diameter than the stock tires. Which if I am thinking correctly, would make everything in the drivetrain spin faster making me be at higher rpm's compared to what stock would be. Which would explain why last time out I was trapping 93mph compared to a best of 91 last night and that 88mph run. It hit the limiter every time, just the second run was going so much quicker that it hit before causing a difference. When it hit it bounced off the limiter so bad that it felt as though I had applied the brakes. I even tried leaving overdrive off in my last run, thinking shifting would save more time than bouncing off the limiter, yet it still hit the limiter and didn't shift.
If you compare my first two runs you can see that I was ahead at each e.t. point, up to four hundredths at the 1/8th, yet ended up only finish one hundredth ahead of my first run.
.........................1st Run:...2nd Run:
Reaction Time:......0.5099.......0.1130
60 Foot Time:.......2.2890.......2.2619
330 Foot Time:......6.4809.......6.4502
1/8 Mile Time:.......9.8880.......9.8499
1/8 Mile MPH:......71.33.........72.81
1000 Foot Time:..12.7670......12.7320
1/4 Mile Time:.....15.1870......15.1750
1/4 Mile MPH:......91.64.........88.58
If you compare my first two runs you can see that I was ahead at each e.t. point, up to four hundredths at the 1/8th, yet ended up only finish one hundredth ahead of my first run.
.........................1st Run:...2nd Run:
Reaction Time:......0.5099.......0.1130
60 Foot Time:.......2.2890.......2.2619
330 Foot Time:......6.4809.......6.4502
1/8 Mile Time:.......9.8880.......9.8499
1/8 Mile MPH:......71.33.........72.81
1000 Foot Time:..12.7670......12.7320
1/4 Mile Time:.....15.1870......15.1750
1/4 Mile MPH:......91.64.........88.58
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Why is your car hitting the rev limiter?
I have shorter than stock tires and 373's and mine doesnt
(of course I have a good solid tune though)
Is your car hitting the rev limiter on the 1-2 shift?
IF so, you need to check your 1-2 accumulater and make sure it's not stuck.
General rule of thumb... from the 1/8th mile to the 1/4 mile you SHOULD pick right AT 20 MPH.
your 15.18 pass DOES have the 20MPH
your 15.17 pass only picked up 15MPH
Driller is right your MPH is low, and that means your HP is low.
MPH is based of HP
How much time was between your 1st and 2nd run?
Did you give the car time to cool down?
Did you sit in the car idling in the lanes?
I'm just trying to help you figure out where you lost 5MPH from 1 pass to the next.
My car is just now hitting 80 in the 1/8th and 100 in the 1/4.
Ignore ET as it's really just a measure of your cars "total package" and how well it works/efficiency.
I have shorter than stock tires and 373's and mine doesnt
(of course I have a good solid tune though)
Is your car hitting the rev limiter on the 1-2 shift?
IF so, you need to check your 1-2 accumulater and make sure it's not stuck.
General rule of thumb... from the 1/8th mile to the 1/4 mile you SHOULD pick right AT 20 MPH.
your 15.18 pass DOES have the 20MPH
your 15.17 pass only picked up 15MPH
Driller is right your MPH is low, and that means your HP is low.
MPH is based of HP
How much time was between your 1st and 2nd run?
Did you give the car time to cool down?
Did you sit in the car idling in the lanes?
I'm just trying to help you figure out where you lost 5MPH from 1 pass to the next.
My car is just now hitting 80 in the 1/8th and 100 in the 1/4.
Ignore ET as it's really just a measure of your cars "total package" and how well it works/efficiency.
I still do not understand.
I see very marginal differences except the MPH. Your 1/8th mph is actually HIGHER and yet the 1/4 mph is significantly LOWER.
Maybe it's just the speed trap timer was malfunctioning? What were the other runs like? Maybe you lifted at the end a tad soon?
Please don't misunderstand, I'm not berating you, the car or the run - I'm just insanely curious. I'm a numbers guy and that number just doesn't fit.
jbird97
Registered
xlrviii, my car is completely stock other than removed air silencer and different size tires. That is the only thing that has changed since I last ran and then I was trapping 93mph. So 3.27s and stock tune.
It is hitting the limiter at the end of 3rd.
In between runs, I parked it for awhile, then staged it, someone crashed, and it ended up being a few hours between runs. In the lanes my car was parked with the hood up, if the lanes were moving then I had defrost on full blast to try to get of extra heat. My car was coolest for the second run.
My car hit the limiter at the top of 3rd in every run. The reason I pointed out et's is that it shows that I was ahead in the second race. In the first run it hit the limiter as I crossed the finish line, or within a few feet. In the second run, because I was having an overall faster run it hit the limiter earlier on the track, causing me to bounce of the limiter for a longer period of time before crossing the line.
Only thing different between the first two runs, is that I dropped the tire pressure to get better traction on my launch.
Driller, my mph was higher at the 1/8th because up until somewhere in between the 1000' and the 1/4, it was a faster race, which is also represented by the et's. I think the timer was working, for comparison, the vette I was lined up against ran a 12.106@111.93 1/4 with 8.6351@84.43 at the 1/8th. My third run was nearly identical to my first except I spun bad at the start, so the times are behind about 1 hundredth the entire way down the track. The car also hit the rev limiter in third on my third run, but like the first, it was closer to the finish and didnt slow me down as much.
I understand and take no offense. It really on paper doesn't add up. The best I can come up with is, the second run was a better run, maybe 15.0 which caused me to hit the rev limiter earlier on the track. Like I said before it hit so hard that it felt like I had applied the brakes, and felt like I was thrown out of the seat a little bit. I didn't lift.
Heres my third run for comparison:
Reaction Time:....0.187
60 Foot Time:.....2.358
330 Foot Time:....6.559
1/8 Mile Time:.....9.966
1/8 Mile MPH:....71.10
1000 Foot Time:.12.855
1/4 Mile Time:....15.284
1/4 Mile MPH:.....91.34
It is hitting the limiter at the end of 3rd.
In between runs, I parked it for awhile, then staged it, someone crashed, and it ended up being a few hours between runs. In the lanes my car was parked with the hood up, if the lanes were moving then I had defrost on full blast to try to get of extra heat. My car was coolest for the second run.
My car hit the limiter at the top of 3rd in every run. The reason I pointed out et's is that it shows that I was ahead in the second race. In the first run it hit the limiter as I crossed the finish line, or within a few feet. In the second run, because I was having an overall faster run it hit the limiter earlier on the track, causing me to bounce of the limiter for a longer period of time before crossing the line.
Only thing different between the first two runs, is that I dropped the tire pressure to get better traction on my launch.
Driller, my mph was higher at the 1/8th because up until somewhere in between the 1000' and the 1/4, it was a faster race, which is also represented by the et's. I think the timer was working, for comparison, the vette I was lined up against ran a 12.106@111.93 1/4 with 8.6351@84.43 at the 1/8th. My third run was nearly identical to my first except I spun bad at the start, so the times are behind about 1 hundredth the entire way down the track. The car also hit the rev limiter in third on my third run, but like the first, it was closer to the finish and didnt slow me down as much.
I understand and take no offense. It really on paper doesn't add up. The best I can come up with is, the second run was a better run, maybe 15.0 which caused me to hit the rev limiter earlier on the track. Like I said before it hit so hard that it felt like I had applied the brakes, and felt like I was thrown out of the seat a little bit. I didn't lift.
Heres my third run for comparison:
Reaction Time:....0.187
60 Foot Time:.....2.358
330 Foot Time:....6.559
1/8 Mile Time:.....9.966
1/8 Mile MPH:....71.10
1000 Foot Time:.12.855
1/4 Mile Time:....15.284
1/4 Mile MPH:.....91.34
No way. 2nd maybe. Hell man, the rev limiter at 6 grand in third with 3.27s and stock tire is 142 mph!
What size tire are you running?
I've hit the rev limiter before - so I know what it feels like - BUT I had inadvertently left it in second.
I don't know what's going on but you are NOT be hitting the rev limiter in 3rd!! Shoot, unless you're spinning madly, hitting the rev limiter on the 1-2 shift or 2-3 shift is not normal.
Something is amiss.
46callaway
Registered
I think he means he hit the rev limiter in 2nd which is very possible with an LSC and stock 6000rpm redline.
jbird97
Registered
Oh oops, well maybe it is at the end of 2nd then. I don't really pay that much attention to the rpms, keeping my eye on the track. It is hitting the rev limiter near the end of the track at around 90mph, so which ever gear that is, its that one. My mistake, I'm not spinning that bad, theres no way the car is going near 140 lol. The tires are 255/40/R16 if I remember correctly.
Anyways, I am going back again tomorrow, any ideas to get quicker times? I put in some octane booster for the hell of it, and also replaced my dirty air filter with a Motorcraft drop-in. Gonna take some things out of the car, but i don't want to go crazy taking things out. Want to find out what it runs everyday, not stripped, but any little extra things to maybe get it to fifteen flat would make me happy.
Anyways, I am going back again tomorrow, any ideas to get quicker times? I put in some octane booster for the hell of it, and also replaced my dirty air filter with a Motorcraft drop-in. Gonna take some things out of the car, but i don't want to go crazy taking things out. Want to find out what it runs everyday, not stripped, but any little extra things to maybe get it to fifteen flat would make me happy.
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Change the fuel filter.
Disconnect the battery and force the car to re-learn(before you leave for the track).
Have at least 1/4 tank of gas at the track.
Empty the trunk(tools, spare, jack, etc...).
Turn air suspension switch off.
Turn off EATC.
Raise the front tire pressure to 45 psi.
Lower the rear tire pressure(start at ~25 psi).
You need at least a 45 minute cool-down period(hood open).
Switch OD off.
Turn Traction Control off.
Drive around water box if possible.(Street tires)
Do a light burnout, stop, move forward a couple inches, do another light burnout.(Open differential)
After lighting up the 2nd staging light - bump forward 2-3 times(without deep-staging).
Use just enough brake at the line to hold the car.
Launch from idle.
Exhale when you launch and don't breathe until you finish the 1/4 mile.
(OK, just kidding on that last one)
Collect your 14 second timeslip.
jbird97
Registered
Thanks Driller,
Let's see, I wont have time to change the fuel filter.
I'll do the battery thing.
Gas check.
Trunk in the morning.
I'll do the air ride at the track, didn't know that helped, less electrical load? Plus something with suspension gains too?
Tires, cool down, O/D, TCS, EATC, water box, burnout, check.
I'll try to remember to bump forward, don't know if I will though, I tend to get anxious when staged.
Is it better to launch from idle than to bring the rpms up?
Lol I might try that last one.
I'll do my best to bring home a 14 for L.O.D., I'm sick of being one of the few members in the 15's. Wish me luck.
Let's see, I wont have time to change the fuel filter.
I'll do the battery thing.
Gas check.
Trunk in the morning.
I'll do the air ride at the track, didn't know that helped, less electrical load? Plus something with suspension gains too?
Tires, cool down, O/D, TCS, EATC, water box, burnout, check.
I'll try to remember to bump forward, don't know if I will though, I tend to get anxious when staged.
Is it better to launch from idle than to bring the rpms up?
Lol I might try that last one.
I'll do my best to bring home a 14 for L.O.D., I'm sick of being one of the few members in the 15's. Wish me luck.
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launch from idle.
this time, without distracting yourself "too much" try and make mental note of the gear changes and what gear you are actually in at the finish line.
With stock 307 gears my car would cross the 1/4 mile IN second gear.
Now with 373's the car shifts into 3rd about 50 ft before the finish line.
Driller, w/327's could he be "right AT" the finish line when it shifts?
I know it sounds weird, and it's early and I haven't had cofffeeee yet.
this time, without distracting yourself "too much" try and make mental note of the gear changes and what gear you are actually in at the finish line.
With stock 307 gears my car would cross the 1/4 mile IN second gear.
Now with 373's the car shifts into 3rd about 50 ft before the finish line.
Driller, w/327's could he be "right AT" the finish line when it shifts?
I know it sounds weird, and it's early and I haven't had cofffeeee yet.
255/40-16? That's 2-1/2 inches shorter!
Tire Calculator
Yes, with stock tires and 3.27s, 6000 rpm in second is 94 mph. That would put the shift point pretty close to the finish line.
With smaller tires, the shift point would be at a lower mph.
With a near-stock 26" tire at the track, the 'perfect gears' for a N/A Mark VIII is 4.56s.
Quarter Mile Performance
quicken up the 1-2 shift, same for 2-3 and bump the rev limiter just a bit.
that'd do it!
jbird97
Registered
You guys are awesome, thanks for all the tips. They really helped. I have to go back out, so I will post slips and all that later. But for now, the car does end up in second at the end of the track, it bounces off the limiter but will not shift, though it shifts fine just driving it around. I plan on quickening the shifts and bumping the limiter via a tune from Lonnie over the winter. Anyways on to how
I did. Ran three times, all were in the 14's, my best time being a 14.7, but like I said I gotta go, I'll post slips and all that when I get back in. WOOOO
I did. Ran three times, all were in the 14's, my best time being a 14.7, but like I said I gotta go, I'll post slips and all that when I get back in. WOOOO
46callaway
Registered
Congrats! That's a huge improvement and you didn't even do any new mods haha...
jbird97
Registered
Haha, yea I love it. I think turning off the air ride and emptying my trunk made the most difference. Driller you should publish that, you'd make a killing, obviously it works. I'm a little tired so taking a picture of the actual slip isn't gonna happen tonight, but heres the breakdown of the slip of my best run, as well as the only video taken. The video is of my last run which was a 14.8538 @ 91.25
Reaction Time: 0.363
60 Foot Time: 2.142
330 Foot Time: 6.171
1/8 Mile Time: 9.479
1/8 Mile MPH: 73.66
1000 Foot Time: 12.300
1/4 Mile Time: 14.700
1/4 Mile MPH: 91.83
Video:
http://s26.photobucket.com/player.s...ms/c114/Ainline41/27291666.flv&fs=1&os=1&ap=1
Reaction Time: 0.363
60 Foot Time: 2.142
330 Foot Time: 6.171
1/8 Mile Time: 9.479
1/8 Mile MPH: 73.66
1000 Foot Time: 12.300
1/4 Mile Time: 14.700
1/4 Mile MPH: 91.83
Video:
http://s26.photobucket.com/player.s...ms/c114/Ainline41/27291666.flv&fs=1&os=1&ap=1