[FlukeSS]

No real improvement but I think this place does the ef'd up 1/4 mile. Where its only 1/8th and they calculate the 1/4 based on that.

In any case here's the video along with slips.

DA: ~2300-2400
Temp: 77-82 degrees F
Tire Pressure: 26lbs
Humidity: ~71%

I think I was treating the tires as if it was the first time. Expected them to break loose but I never did feel them break loose or hear them break loose.

[wnta1ss]

Originally Posted by FlukeSS

No real improvement but I think this place does the ef'd up 1/4 mile. Where its only 1/8th and they calculate the 1/4 based on that.

WHY would you think that? Those orange boxes in between the lanes are reflectors for the timing system. Notice how they are there at the 1/4 mile too? Timing system looks real to me in your vid.

As far as an estimate from 1/8 to 1/4, those calculators are NOT accurate for a street car. I tried a couple of those calculators with your 8.133 ET at the 1/8 mile, and they said 12.75 and 12.93 sec respectively for the 1/4. Not even close to your actual ET of 12.289 sec.

[FlukeSS]

Originally Posted by wnta1ss

WHY would you think that? Those orange boxes in between the lanes are reflectors for the timing system. Notice how they are there at the 1/4 mile too? Timing system looks real to me in your vid.

As far as an estimate from 1/8 to 1/4, those calculators are NOT accurate for a street car. I tried a couple of those calculators with your 8.133 ET at the 1/8 mile, and they said 12.75 and 12.93 sec respectively for the 1/4. Not even close to your actual ET of 12.289 sec.

Because my last run I pulled 120mph on street tires, 30mph difference between 1/8th and last 1/8th when the other 6 times I went I couldn't break 116. Just didn't seem right. Even your calculations basically say I never should have made 120mph. A 12.7 - 12.9 car is what at most 100-110mph?

Even the guy in the truck next to me was surprised. We talked about it he said it looks like all my power is in the last 1/8th mile.

Just have a gut feeling my mph shouldn't be that high given this time the DA was almost 1000 higher than the first time I went. The lower the DA the better the engine performs right?

Then why does it seem like my car performs better in higher DA and more humid conditions? To me it sounds counter-intuitive am I wrong here?

[s346k]

picking up 28 mph is suspect with those mods but not unheard of if you pfoot the first couple hundred feet.

[redcoats1976]

considering that i just watched a video of a stock 1969 dodge daytona with a 426 hemi that did 0-60 in 6.1,and quarter in 14.1 i think that the newer musclecars are pretty respectable.oh yeah,it was getting 8 mpg too.

[FlukeSS]

Originally Posted by s346k

picking up 28 mph is suspect with those mods but not unheard of if you pfoot the first couple hundred feet.

Which I admit I was doing because I was so concerned about the tires breaking loose. I was treating the gas pedal the same way I did the first time I went just outright assuming it was going to spin.

But I never heard or felt the tires break loose on the launch.

[Trochoidal]

Originally Posted by s346k

picking up 28 mph is suspect with those mods but not unheard of if you pfoot the first couple hundred feet.

I agree with this all the way down to the pfoot @ the first couple hundred feet.

Originally Posted by FlukeSS

Which I admit I was doing because I was so concerned about the tires breaking loose. I was treating the gas pedal the same way I did the first time I went just outright assuming it was going to spin.

But I never heard or felt the tires break loose on the launch.

If you get that 60’ down and have a better launch, you’ll most likely drop at least 0.2 through the traps.

My car ran within 1mph year between 3 passes. However, my 60’ dropping helped the most before the 1/8th.

I feel you have an 11.70-11.80 in your setup.

Keep practicing and don’t get discouraged.

[Edward Paul]

Were your tire pressures the same?

[FlukeSS]

Originally Posted by Edward Paul

Were your tire pressures the same?

26 psi on the rear 35 psi on the front

[FlukeSS]

Originally Posted by Trochoidal

I agree with this all the way down to the pfoot @ the first couple hundred feet.



If you get that 60’ down and have a better launch, you’ll most likely drop at least 0.2 through the traps.

My car ran within 1mph year between 3 passes. However, my 60’ dropping helped the most before the 1/8th.

I feel you have an 11.70-11.80 in your setup.

Keep practicing and don’t get discouraged.

Honestly not sure if 11.7 is doable, I aim shooting for a more reasonable 11.9 if I can. I'm a bigger guy so I expect the added weight is slowing me down some. Most of the other guys I see racing are probably 50-100lbs less than me. Even with mild expensive weight reduction I don't think I can cut a full 100lbs.

After this day, My suspension feels loose, hearing loud clunky noises when going over mild bumps.

Think I should have the suspension looked at before I go again.

[Edward Paul]

Originally Posted by FlukeSS

26 psi on the rear 35 psi on the front

I was talking about rears only.
I was under the impression you went from street tires to a drag.
On my bike I was losing some top end running my rear tire too low.

[s346k]

i managed to go 11.80 on the street with that same tire and wheel setup.

you gotta pump those numbers up. those are rookie numbers.

[FlukeSS]

Originally Posted by s346k

i managed to go 11.80 on the street with that same tire and wheel setup.

you gotta pump those numbers up. those are rookie numbers.

Ya I know, but I am a rookie still.

Next time I go, I'll try to get into it more from the start, and honestly my reactions although don't count are pretty bad, but figure I'll worry about that after I get better numbers.

Like I said, I didn't feel the tires slip this time at 26 psi so figure that means I can get on it more at the start

[FlukeSS]

Originally Posted by Edward Paul

I was talking about rears only.
I was under the impression you went from street tires to a drag.
On my bike I was losing some top end running my rear tire too low.

No no, still street tires. But the guy in that truck said if I get MT drags he said I'll be low 11's easy. He said its basically a whole new experience with traction. Based on the videos I saw with drags vs street tires, I figure not that good. I figure maybe .5 off my time at best.

If the weather holds up next Wednesday I may go to the strip again see if I can work on my launches.