0-100

[3rdgear]

Guys I've ordered some goodies including Cobb, akrapovic mid/rear axle, forge intercooler, Afe dci open box with scoop. Will use stage 1+ aggressive ots map with stock throttle. Anyone here will a similar set up? What do you think the new 0-100 will be roughly.
I've learnt from this forum that ic, intake and aftermarket exhaust could all effect the lower rpm so can the Cobb fix this issue

Tks and happy sunday

[Artemis]

Try to emulate what forum fellow M3Power79 (aka the Usain Bolt of the 1M) pulled off in MDM Mode and with stock PS2 tires (and I believe his 1M was still stock back in those days):
http://www.1addicts.com/forums/showthread.php?t=668716

[Can84]

I have Akrapovic Evolution exhaust with downpipes and Pzero corsa tires with stock ECU.

[Em/1]

Wow; nice technique (and maybe some good ecu adaptation to better exhaust!)

[froop]

Mine's not a 1M and my car has more power mods but I managed a 3.89s at the drag strip on stock 135i suspension, no TC and street tyres

[ozinaldo]

Originally Posted by froop

Mine's not a 1M and my car has more power mods but I managed a 3.89s at the drag strip on stock 135i suspension, no TC and street tyres

Impressive but I assume this may be 0 to 60 mph and not metric 100 km/h?

If so that means more or less 4.0 or 4.1 to 100 km/h (most posts in this thread is km) which is still very good (keeping your mods in mind) but might get even better with sticky tires imo.

Could a FBO 1M or a 135i flirt with 3.5 sec to 60 with really sticky tires, I would like to see that. This would be a full second faster than the stock 1M and closer to supercar terrritory.

[froop]

Originally Posted by ozinaldo

Impressive but I assume this may be 0 to 60 mph and not metric 100 km/h?

If so that means more or less 4.0 or 4.1 to 100 km/h (most posts in this thread is km) which is still very good (keeping your mods in mind) but might get even better with sticky tires imo.

Could a FBO 1M or a 135i flirt with 3.5 sec to 60 with really sticky tires, I would like to see that. This would be a full second faster than the stock 1M and closer to supercar terrritory.

It's in kph. I'm an Aussie

I actually think my time may be even slightly faster as the p3 isn't calibrated perfectly. It reads 98kph when my GPS reads 100kph so the 3.89 is my 0-102kph time haha.

I'd love a vbox run to verify but I don't have access to one =(

[ozinaldo]

Originally Posted by froop

It's in kph. I'm an Aussie

I actually think my time may be even slightly faster as the p3 isn't calibrated perfectly. It reads 98kph when my GPS reads 100kph so the 3.89 is my 0-102kph time haha.

I'd love a vbox run to verify but I don't have access to one =(

OK, now with street tires, that's VERY fast!

[marc@x-ph.com]

Originally Posted by ozinaldo

OK, now with street tires, that's VERY fast!

definitely is fast! good driving makes a difference

also don;t forget, tracks are usually stickier than normal roads.

[froop]

Originally Posted by ozinaldo

OK, now with street tires, that's VERY fast!

Originally Posted by marc@x-ph.com

definitely is fast! good driving makes a difference

also don;t forget, tracks are usually stickier than normal roads.

Thanks guys

Though I wouldn't say I'm the best driver. My 0-100 times tend to be a little inconsistent because my 60ft times are still pretty crappy, ~2.1s. I've managed sub 4.0s just a couple times and a couple low 4s some others.

But yeah, definitely the strip is much sticker. I haven't tried it on the street but I doubt it would be able to achieve close to my best times.

I'm very curious though as to see how I'll do with my new M LSD

[froop]

Originally Posted by Ian///M

Can't rely on P3 reading as it is wheel speed not the actual speed achieved by the car. What gps unit you using mate?... Kenny couldn't get it to go that fast

Yeah it's definitely not 100% accurate like a vbox. I remember on one run I somehow managed to pull through the tyres on my 2nd gear change and recorded a 3.2s 0-100kph run , but I've managed a 3.89, a 3.90 and a 4.04 on the P3 and am quite sure the tyres didn't chirp or pull through on those runs.

I did a lot of trips down to the snow over the winter so I figured I'd compare my 3 speedos. The stock speedo, vs some iPhone GPS speedo app, vs the P3.

At 100kph steady on the speedo using cruise control I was doing 95kph on the GPS speedo app and 92kph on the P3.

I remember you got a sub 4.0s run on your P3 though as well didn't you? On the street too if I remember correctly.

[bdaddylo]

Originally Posted by froop

Yeah it's definitely not 100% accurate like a vbox. I remember on one run I somehow managed to pull through the tyres on my 2nd gear change and recorded a 3.2s 0-100kph run , but I've managed a 3.89, a 3.90 and a 4.04 on the P3 and am quite sure the tyres didn't chirp or pull through on those runs.

I did a lot of trips down to the snow over the winter so I figured I'd compare my 3 speedos. The stock speedo, vs some iPhone GPS speedo app, vs the P3.

At 100kph steady on the speedo using cruise control I was doing 95kph on the GPS speedo app and 92kph on the P3.

I remember you got a sub 4.0s run on your P3 though as well didn't you? On the street too if I remember correctly.

P3 0-100 readings are worthless. As Ian stated it measure wheel spin and not actual vehicle speed. Go get or borrow a vbox or Aim and let us know your results.

[froop]

Originally Posted by bdaddylo

P3 0-100 readings are worthless. As Ian stated it measure wheel spin and not actual vehicle speed. Go get or borrow a vbox or Aim and let us know your results.

Whilst it's not 100% accurate as I've already stated, it's not worthless like you say. If you re-read my post you will see that I compared the calibration of the P3 to both the speedo and a GPS app which gives a good indicator as to the degree of its accuracy.

[bdaddylo]

Originally Posted by froop

Whilst it's not 100% accurate as I've already stated, it's not worthless like you say. If you re-read my post you will see that I compared the calibration of the P3 to both the speedo and a GPS app which gives a good indicator as to the degree of its accuracy.

Yes, the P3 speed reading is accurate when there is no wheel slip. The problem during hard acceleration is the wheels slip in both 1st and 2nd gears and since our cars and the P3 gauge measures wheel speed and not actual vehicle speed the 0-100 measurement is not always accurate. Sure, wheel chirp during a gear shift signifies wheel slip, but wheel slip also occurs after the shift and you can't hear it.

I've already tested the P3 side by side with an Aim Solo, so that is the basis for my statement. Until you can provide GPS 0-100 runs, your data points are worthless to me.

[Pete_vB]

Tires always slip somewhat with the road during hard acceleration, up to 20% at peak traction. It's called slip ratio.

For some background you can take a look at this link.

http://www.motortrend.com/features/p...ction_control/

I pulled a few 2.7s in my Porsche with a G-Tech. Problem was it was a 3.7 car. Easy to fool yourself.

[RimasRS]

In straight line you cant expect much from lsd. I have it on my car.