Show us your 60-125mph or 100-200kph times!
 

Related to this discussion we are having here -> Click me I thought it would be a good idea to start a new thread with some more data and to compare different setups without going to the drag strip and as little driver error as possible.

We Euro-guys like to compare 100-200kph or 60-125mph, as it's the most common time measurement for sports cars and it's fairly easy to read out of datalogs or dragys or whatever you like.
The Kmiata gearing calculator -> Click me is maybe helpful for someone to check speed depending on RPM, you can set the rev limit to check exactly how fast you're going at which RPM.

Please post your time, setup and - if you have it - a dyno/virtual dyno!

I try to go out this week and post some useful data, too

Gave it a try after work on the Autobahn, was pretty much traffic against my expectations, could only do one pull from 100-185kph and lifted at the limiter in fourth.
Started in 4th gear and built boost at 100kph, so I think I can do a little bit better...

7,3sec! I estimate 10sec flat to 200kph (0,5s shift to 5th, 2,3sec the last 15kph), will try another one tomorrow. VD gave me 265whp.

Rods only NA8, 94 pistons, stock IM, Kraken exhaust manifold, 3" exhaust with 200cell cat, resonator and big muffler,
GT2560R, 17,5° timing at redline, shell 102 ROZ, 5speed with 4.1 diff

I went back and checked one of my old logs. Its just a full 5th gear pull from 3000rpm to 7300rpm. There is no shift at all involved.

I got 7 seconds flat from 62-125 mph which is 100-200kmh. This was done on the highway on the flattest spot I could find because I do VD runs in this same spot. VD says Im making 366whp/351ftlb @22psi on a GTX2860R Gen2 in that log.

Built BP4W 1899cc 84.5mm bore, Flat Top manifold, GTX2860Gen2, FM mani/DP, 3" exhaust no cat, VP Octanium 100 octane mix, 18* timing at redline

Thanks Andy!

I had just one chance this morning due to traffic and upped my limiter to juuuust hit 195kph. So I took 95-195kph, which is fairly close and I got 9.4sec.
VD gave me 285whp/270wt, thats 17psi and my turbo/setup is maxed out. Need moar turbo!

Come on guys, 1 to 1 gear and let her rip! Need more DATA :jerkit:

I ripped the SS this morning and it did it in like 10 seconds with kickdown. I know the Miata kinda walks away from the SS but doesn't pull as hard up top.

It certainly isn't easy to do a pull like this in the city. Even Sunday morning at 6am I had to be 30 minutes out of town before there was a big enough gap.

I think the biggest challenge is going to be tracking the time. Probably best to datalog it.

That's the problem I have with the 5th gear pull like Andy did. By the time you get to redline in 5th you are going... fast. You need lots of room and a lawyer on speed-dial.

(Not saying I haven't done it)

Yea Im lucky because at night its a wide open highway on the outskirts of town. So not much if any traffic at 1am. Its crazy how quickly you get to 125mph when you have over 300whp in the miata. I hope more people contribute to this thread because its interesting. It gives you a real idea of where your car stands in the heirarchy of fast cars.

I'll do one in the Miata at some point and log it. Here is a slow car in the meantime.

Does this seem right to anyone else?

13.3 seconds. 4-5th pull (little of 6th hit a bump and feathered throttle, got back into it and still had some wheelspin, PUCKER MOMENT).
6 speed car, 3.636 rear gear, 225/45/15. End of 5th 6800rpm = roughly 125.

https://cimg5.ibsrv.net/gimg/www.mia...ee431fb7e8.jpg


Seems a bit slow.

Hmmm... My car can't do 125 in 5th but it can do 0-120mph in 11.9 seconds, so yeah, that seems a bit slow.

https://cimg7.ibsrv.net/gimg/www.mia...56691ed7c2.jpg
Try just doing a long pull in 5th no gear changes.
I get my best time when I just start at like 45mph in 5th and just let it ride out. By the time you get to 60 you should be at full boost and not having to shift I think it might be faster.

I have found the gearing calculator to be less than perfect.

Welli can definitely hit 125 in 5th in my car indicated by the speedo and in logs. I don't see how it can be incorrect it's a gear calculator. It's math, if the math is correct how can it be incorrect?

Maybe tire inconsistency. According to the gearing calculator I should be able to go 122.9 in 5th at 7 grand, but that is definitely not the case. Just sharing my direct personal experience, maybe you know better than me Son?

According to the calculator I can go 0-128 in 11.9 seconds.

But my time slip shows 121.

Lol I'm not your son dad. So your saying at the drag strip it shows 121mph but the calculator shows 122.9?

:rofl: Oops, though I was responding to Dkmakinson.
I am saying that I was clocked at 121 but according to my log and the gearing calculator I was doing 128.

Well that's tarded. I guess we trust the drag strip in this instance? Thanks so much for your input dad, now go get a 60-125 time for this thread.

I have very similar results at the drag strip. Calculator shows I can go through the traps at a lower rpm than what I am actually getting. I suspect there are several factors causing this. A slight slipping of the clutch, tires, and perhaps some tire distortion? Don’t know for sure, but it’s definitely a thing.

Hmm well maybe I'm not hitting 125 when I think I am according to logs then. I'll have to gps speedo it to really know.

All I really have to go on is gearing calculator. The speedo in my car is not at all accurate and I wouldn't trust it anyway if it was. I do know that the gear calculator is pretty accurate (at least at normal driving speeds). I do not think my tires are standing up at 120mph. Maybe big balloon drag tires, but not R1Rs.

I ran another test but started in 3rd which was stupid because I was half way through the power band at 60mph with my little turbo. This run I started at about 50mph so I had a rolling start through 60. I lost a ton of time with a 1.0s and 1.2s (3-4 and 4-5) shifts. 14.5 seconds 60-125. So it does validate my first time I got, or at least, the time I got from X speed to X speed. Since I don't have anything better to datalog with, this is about the best I can do.

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The shifts kill the time, just roll out in 5th long pull. Trust me bro

https://cimg0.ibsrv.net/gimg/www.mia...b90e2b6d6a.jpg
https://cimg2.ibsrv.net/gimg/www.mia...b029a90a02.jpg
just for reference

Super bikes are outrageous.
In fact that entire list makes the ~13s I did in the SS look like a slug.
Ill try and get some data tomorrow morning. :party:

Start in 5th like I said way before 60. Then when you roll through it you're already in boost. I'm not sure if this list is supposed to be hit the gas at 60 and count from that point, I would lose time waiting on spool. I do a lot of tuning on my car with 5th gear pulls because it gives you really good data, so I literally have like 20 logs to pick from. 7 seconds seems crazy fast but my car isn't slow either. I like this more people need to hop in this

Pick up a dragy. They are pretty cheap and VERY accurate. I've tested it at the track and its almost always within a few hundredths of a second and 1/2mph of the timeslip.

I may do that, they are a little over a 100 bucks so it's not just a oh cool I'll buy it purchase ya know. But I do want one

Since its accuracy is proven and its repeatable its a good tuning tool. Pretty cheap for what it can do imo,

My logs from the dragstrip show 7.6 seconds from calculated 62-125, shifting of course. Both high 11's and low 12's.

Nice! That's about what I was expecting from your car. I need to get to the drag strip I've been able to keep up with cars that run mid/low 11s and that would back up my 7 second 60-125 time.

Somehow what I wrote got deleted. Anyway.
Rolling through 3500rpm(60mph) to 7000rpm(125mph). Not sure how much more i'm going to get out of a 2560 at 12psi. I could add boost, but I blow out spark in the higher RPM with the stock coils. And my duty cycle gets spicy with more boost. E85 life. It seems to be at full steam around 3500rpm in 5th.

https://cimg6.ibsrv.net/gimg/www.mia...b78808e7ae.jpg

What do we think? Add more timing? It's at like 15* now. Maybe 17* at this lower boost. This engine is kind of high compression, I don't want to push it.

So you're running e85 and only 17* timing? Is that a built motor? You could literally be running 22-24* no problem imo. Also why is your spark getting blown out, I run stock nb1 coils at 22psi they are just fine.

I run stock coils too and well over 30psi. Close your plug gaps a bit and you should be fine at your boost level. For bigger boost I run solid copper core plug wires, and solid core non-resistor racing plugs gapped at .020ish.

Naw I run 15* of timing. And yeah it is a built motor. I have a hair dryer 2560 with like 9.5:1 compression. 94 coils blow out at 20psi with a .025 gap.
Edit* this car is kind of built just to thrash. Just rip it at every opportunity. I could do endless 60-125 rips until I ran out of gas if I wanted. So it's tuned rather safe. I'd also be far more confident if I had a knock sensor.

Andy, you have to correct your megasquirt speed with a gps reference. From straight math you usually see 6% diference from true speed versus teorical speed. Than you have tyre diameter diferencees from manufactoring and simple tyre wear. Go to tunerstudio and tweak your tyre diameter until tunerspeed shows GPS speed. Other factor Dragy corrects is slope. It invalidates any run over 1% slope, and bellive me, it's easy to go to a straight you think it's uphill and it's actually downhill.

Regarding beeng faster with using only fifth gear, just do the math of average HP from 3500 to 7000 vs 5500 to 7000, there's no way your faster with single speed run, even adding 0,25s to a shift.

That last table only shows how diferent 400hp are different in different countrys, i have a 400hp miata faster than a 997TT, 18PSI is faster than a veyron with the "same" 400hp.

I was really looking forward to the discussion we are having here. Good points were made.

If anyone has a dragy or driftbox, please let us know and post your setup.

For the guys, who can only take datalogs (including me), we should make 1:1 gear runs from say 2000rpm to fully spool even the laggiest setups and compare from there.
My run posted above was 50mph all the way to redline at 7300rpm in my 1:1 gear and a 4.1 diff.

Please go on guys, I like where this goes :likecat:

edit:
We should all buy dragys and keep it at 60-125mph :D

I have a dragy and have used it while at the drag strip. The dragy is always very close to the timeslip from the track. However the track I go to is only an 1/8th mile track. I have run a best of 6.88 seconds and 107.88 mph, the dragy said 6.86 seconds @ 108.09mph so was only 2 hundredths of a second and less than 1/2 of a mph difference, so very close. According to dragy i did 40-100mph in 4.15 seconds on that pass. On that pass it also recorded 11.51 seconds @ 75 mph, of course I was slowing down and on the brakes shortly after the 1/8th mile, but the dragy was still recording data. That pass would have been well in the 10's in the 1/4 had I room to run it out and still stop before end of track. I havent set up my dragy to run 100-200kph yet but may next time I go to track, Im just not sure if there is enough room in shut down area. Going by standard calculations for power adder cars of 1/8 mile trap speed x 1.26 (usually at minimum for turbo cars) 107.8 mph in the 1/8th should be roughly 135mph minimum in the 1/4mile so I'll likely have to run up to near the 1000' mark for 125mph. I don't plan on running that fast on the street. You get caught going that fast on the street you will go straight to jail.

Ok, I measured my wheel radius with a yard stick on my crappy uneven garage floor and it is almost 11". That gives roughly 22" diameter, a bit different from the 23.1" on the calculator. If I use a 43 series tire in the calculator I get 21.9. This works much better, nope I can't do 125 in 5th.

Hey Andy I just looked at you head replacement video. On that video you "timed" 60-120 in 5.8 seconds. After watching that I have to agree with kamel6k that you may want to check your logging software speed against a gps. I'm still a firm believer in the dragy data though against most other forms of diy measurements for performance metrics. I've tested the dragy, the g-tech (older version), and the perfexpert app. (its a paid app) while at the track. The dragy was by far consistently the most accurate to timeslips from the track, and yes you would trust the timers at a nhra sanctioned track over other forms of diy timing measurement. Prize money is on the line so it has to be accurate. The dragy is also the only one that I've tested so far that shows road slope. If money is tight The perfexpert app wasn't too terrible. The perfexpert did require a little practice to get the start sensitivity correct for the most accurate results. It also was the least accurate of the three a tried so far. The perfexpert app consistently displayed a higher trap speed by several mph in the 1/8th than track slip. However once you set it up right the 0-60mph measurement was usually within a couple tenths(perfexpert usually displayed 1 to 2 tenths quicker) of the others, so not great but not horrible either considering the price.

gt3076r manual transmission and 3.636 diff. Low boost until 5th gear, and a very soft start with little traction (cold asphalt) But it still moves out pretty good :) hoping to cut times down closer to 9 seconds with the 7 speed, more boost in all gears and 4.1 diff


https://cimg7.ibsrv.net/gimg/www.mia...fd900d1afb.jpg
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