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

 

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.




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.

 

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?

 

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.