[e36jakeo]

So a couple days ago I got my V2 installed (THANKS DUSTIN!) and, after playing around a bit, letting the car adapt, I mixed in some 100 octane to make about a 96 octane mix and did some 1/4 mile tests. No, this was not on a real 1/4 mile track, however my Passport G Timer has been spot-on compared to what I ACTUALLY turned for times at Infinion raceway in multiple cars. I run the 1/4 mile on a perfectly flat surface and in both directions, making sure to calibrate it each time.

My times when the car was stock were 0-60 in 5.4 seconds and 1.4 mile at 13.8 at 101 mph. My shifts were not that quick, which cost me.

With V1.47 I managed 0-60 in 4.58 seconds and a 1/4 mile in 13.28 @ 107.4 MPH (best of about 6 attempts) using a mix of around 94 octane gas, in dry 60 degree weather. Much quicker shifting and better lauches.

With V2 (96 octane mix) I ran 0-60 in 4.26 seconds (!!!) and a quarter mile in 12.78 @ 109.4 (!!!!!!). Even with warm tires and hooking up in 1st gear the tires would begin to spin at 5000 rpm in 1st gear. I 1-2 shifted at 7000 rpm, 2-3 shifted at ~6800 rpm and 3-4 shifted at ~6600 rpm (which, according to the significant HP drop off after 6500 rpm should be about right). Although 2 MPH trap does not seem like that much of an improvement, from a feel perspective it is dramatic (rule of thumb, each 10 hp increases trap speed by ~1 MPH). The slight bit of wheelspin at the top of 1st gear may have hurt me. After cooling the car a bit and with my 180 lb. buddy in the car I was still able to attain a 109.3 MPH trap speed on a 13.05 run, so I think 110-111 is to be had. The drop in 1/4 mile time WAS dramatic (13.28 to 12.78 or a FULL HALF SECOND!) so in a side-by-side race this means the V2 would be about 80 feet (~ 5 car lengths) ahead at the end. Yes, a HUGE difference.

As much as we all harp on V2's HP and speed advantage, it really is the FEEL difference that makes it SO much better. The throttle is amazingly progressive and the power delivery is amazingly smooth from 1500 RPM to 6500 RPM. I'd argue that it is the broadest powerband of any car currently on the market. It pulls hard from ANYWHERE on the tach and makes normal traffic feel like it is standing still.

91 vs 96 octane: 96 offers more low-end grunt (maybe 20 lb ft of torque) but hard to say if more than 10 hp up top. 91 runs perfect and pulls really hard. I will have to redo the performance testing with 91 some time.

I promise to hit the track to verify these results.

Conclusions: V2 rocks, freer-flowing exhaust may help power above 6200 (HP peak) where it still drops. Car pulls MUCH harder from 5000 to 6200 than V1.47. Need LSD!!!

[O-cha]

Now that there is a speed wire in the future it will be a lot easier to get a good handle on acceleration. I mean it's like a godsend to be able to log speed vs time. None of the gbox stuff, tons of users will be able to log actual 0-60 0-100 times.

[sflgator]

Nice testing and nice results!!!!

[e36jakeo]

Originally Posted by O-cha

Now that there is a speed wire in the future it will be a lot easier to get a good handle on acceleration. I mean it's like a godsend to be able to log speed vs time. None of the gbox stuff, tons of users will be able to log actual 0-60 0-100 times.

I am pretty sure the "gbox" stuff works well if you can find a perfectly flat surface. For four different cars I matched within .1 or .2 the 0-60, 0-100, and 1/4 mile times published by Car and Driver. The problem is the surface has to be level and smooth the entire length of the 1/4 mile, and this is hard to find on normal roads.

I'll confirm the times at Infinion soon.

[BMWPower06]

damn i was really hopin for ~12.5s in the 1/4 with V2.

[stefano7171]

Thanks for posting, very interesting!

Did you keep the default settings?

Thanks!

[dxb335d]

Firstly well done, and im glad your enjoying your car and its mods


Surely with a Timer GPS system is a bit innacurate? surely with official timing gear at a drag strip would see some Real results? I am not doubting your times as i know they have been achieved on a drag strip but with your own timing equipment inconsistencies could become apparent between runs without you knowing!

I do not tho believe a 400bhp (crank HP) could achieve a 4.2 0-60 in a 1550KG car!! ( Assuming V2 = 400CRANK HP)


Carlos

[leftcoastman]

Originally Posted by O-cha

Now that there is a speed wire in the future it will be a lot easier to get a good handle on acceleration. I mean it's like a godsend to be able to log speed vs time. None of the gbox stuff, tons of users will be able to log actual 0-60 0-100 times.

You can easily do that right now. Find the gear ratios on bmwusa, the procede data log provides the rpm and time data, you can calculate the rest.

Verified at the track, for the 1/4 mile, I was within one hundreths of a second accurate and trap was spot on.

[Serjames]

Carl you need to be careful here, there are SO many variables to consider with 0-60 which is why, IMHO, it's a metric for pub braggin only.

A) the difference between 4 seconds and 4.5 seconds is, er, like 1/2 a second that's VERY small, i don't think I could count this and I doubt much of the commercially available amateur equip is really THAT accurate anyway.

B) what tyres, what road surface, what air temp, what EXACT weight of car, how heavy is the Driver etc etc etc

I know you obsess a little about pod results, but I don't think in all of the runs we've been on together ANY of us has actually lined up at a light and used any of those skills ?

What I want to see are more M5board type results where cars go 0-limiter or 30mph to limiter, now THAT's a test of the whole power/transmission/traction.

SJ

[dxb335d]

Originally Posted by Serjames

Carl you need to be careful here, there are SO many variables to consider with 0-60 which is why, IMHO, it's a metric for pub braggin only.

A) the difference between 4 seconds and 4.5 seconds is, er, like 1/2 a second that's VERY small, i don't think I could count this and I doubt much of the commercially available amateur equip is really THAT accurate anyway.

B) what tyres, what road surface, what air temp, what EXACT weight of car, how heavy is the Driver etc etc etc

I know you obsess a little about pod results, but I don't think in all of the runs we've been on together ANY of us has actually lined up at a light and used any of those skills ?

What I want to see are more M5board type results where cars go 0-limiter or 30mph to limiter, now THAT's a test of the whole power/transmission/traction.

SJ

So why dont we Hire Bruntingthorpe, some official FIA timing gear and get on with it!!

Drag times are important, cuz every car ran there is on the same strip withthe same Very accurate timing gear!!!! Just driver competence affecting times, aswell as different weather conditions/different days!!!

If one car does a 13.0 and another 14.0 with different HP levels, then its suffice to say on the road one car would be quite clearly quicker than the other!


Carlos

[!Xoible]

this thread tells me to order one... NOW

[e36jakeo]

Originally Posted by dxb335d

Firstly well done, and im glad your enjoying your car and its mods


Surely with a Timer GPS system is a bit innacurate? surely with official timing gear at a drag strip would see some Real results? I am not doubting your times as i know they have been achieved on a drag strip but with your own timing equipment inconsistencies could become apparent between runs without you knowing!

I do not tho believe a 400bhp (crank HP) could achieve a 4.2 0-60 in a 1550KG car!! ( Assuming V2 = 400CRANK HP)


Carlos

The V2 (about 410 crank HP with 96 octane) has such a broad powerband that it launches very effectively, which helps its 0-60 time. FYI, Car and Driver timed the E92 M3 0-60 in 4.3 seconds. That car has about the same power to weight ratio, but has much less torque. I think 0-60 in 4.2-4.3 is quite likely for V2 335is with a great launch and a perfect 1-2 shift.

[baron]

Nice results. I would like to run similar tests but I have yet found a road that is long and flat enough for the 1/4 mi. Where are you located at?

[Driver72]

Nice improvement in times.
Even though I don't put full faith in non-GPS based accelerometers as being too accurate, they at least will show whether you've improved or not and that shows power differences.

BTW, for what it's worth, you mentioned "2 mph trap does not seem like much of an improvement"
but you need to remember not only did you improve by 2 mph but did so in .5 seconds less time.
You have to take both time AND speed into account.
That's the reason, with the passenger you were also able to get the same trap speed, but since you got a slower ET with the passenger, you had a bit more time to accelerate and therefore matched the trap speed of your faster solo run.

In any event, is your car stock in all other accounts (stock runflats, stock exhaust, stock intake, etc etc)?

If so, even if those times are off by give or take a bit, still very impressive. Just imagine what you could do with custom exhaust, lightweight wheels on Drag Radials, DP's, etc.

[Serjames]

Originally Posted by dxb335d

So why dont we Hire Bruntingthorpe, some official FIA timing gear and get on with it!!

Drag times are important, cuz every car ran there is on the same strip withthe same Very accurate timing gear!!!! Just driver competence affecting times, aswell as different weather conditions/different days!!!

If one car does a 13.0 and another 14.0 with different HP levels, then its suffice to say on the road one car would be quite clearly quicker than the other!


Carlos

We're working on it as you type Carlos

My point about 1/4 miles is that IMHO Only they are now too short a distance to test today's cars, too much of the distance is taken trying to get traction.

Am thinkng about a Jan or feb track event for the UK team, interested ?

SJ

[dxb335d]

Originally Posted by Serjames

We're working on it as you type Carlos

My point about 1/4 miles is that IMHO Only they are now too short a distance to test today's cars, too much of the distance is taken trying to get traction.

Am thinkng about a Jan or feb track event for the UK team, interested ?

SJ

i dont agree, a 1/4mile may not be perfect due to traction, but is far better for measuring a cars performance than 0-60!!!

its not just about the time, the trap speed is very important also

i raced one car at the quarter, he had me right untill the end, i did a (not my best) 14.3 i think he did a 14.1 but he trapped 97mph and me 103mph



so therefore i was gaining like a BIATCH at the end of the strip proving my car was much faster above 60-70mph.. he prob still did a 0-100 in late 14's where is i did it mid to low 13s


Carlos
p.s why cant i organise it with you?


you mean track day? or a proper performance day with a runway with lots of 30-160+mph tests with differently modified cars?

[Serjames]

carl I think your arguing my case for me... your car ONLY started to show the powere at the very END of the 1/4

hence my comment that they are NOT long enough.

Yeah I'm working on a runway / autocross type event

SJ

[e36jakeo]

Originally Posted by baron

Nice results. I would like to run similar tests but I have yet found a road that is long and flat enough for the 1/4 mi. Where are you located at?

I am in the Bay Area.

[E92Fan]

Originally Posted by Serjames

carl I think your arguing my case for me... your car ONLY started to show the powere at the very END of the 1/4

hence my comment that they are NOT long enough.

Yeah I'm working on a runway / autocross type event

SJ

Ssssshhhhhhhhh!!!!!!!
Don't let it out of the bag yet!!!

[jerrym]

wow.. those times.. are fast..

[Maestro]

I think you could beat these cars times

[chromerl]

Originally Posted by e36jakeo

91 vs 96 octane: 96 offers more low-end grunt (maybe 20 lb ft of torque) but hard to say if more than 10 hp up top. 91 runs perfect and pulls really hard. I will have to redo the performance testing with 91 some time.

Not sure the difference in 91 to 96 octane yields an additional 20lb/ft of torque.
Seems quite a lot, maybe I'm wrong ??