[sflgator]

Originally Posted by NaViT

by where in Miami do u live? i gotta see u doing these runs in the street

Not in Miami.

[DrM]

Originally Posted by BMWPower06

Thanks, but i already knew all this. I'm wondering why BMW would make the redline 7000, if its more beneficial to shift at 6500

Based on the gearing and the torque curve from an actual dyno sheet, I calculated the optimum shift points. The optimum shift point was about 6750 in the first three gears. The optimum shift points maximize the total area under the torque curve.

So, BMW made the engine rev to 7000 because they can and because that is slightly above the optimum shift point. My suspicion is that people are shifting when they see 6300, which gets them pretty close to the optimum shift point by the time they shift.

[mesier1111]

Originally Posted by sflgator

Yeah, ok, sure. Hey, I've got an idea...why don't YOU buy the PROcede, install it, then uninstall it, then do some timed runs, then install it back in, then do some more timed runs, and then post all your findings.

As easy as it is to install/uninstall the PROcede, this is not the 30-sec. install/uninstall like that of the Turbo Timer. And, frankly, I don't really care what my times were when my car was stock; I just know they're not as fast as my PROcede-equipped car.

WELL SAID.

[NaViT]

Originally Posted by sflgator

Not in Miami.

my bad... where in Florida are u?

[sflgator]

Originally Posted by catm3

Cool. Make two runs back to back varying the shiftpoints. I wouldn't be surprised to see the trap higher with a slightly lower shift point.

Well, I did a few more timed runs today, but this time I short-shifted ~ 6,000-6,500rpm from M1-M5 in the 1/4 mi. However, my times weren't as good as b4...did 4.7 sec. 0-60mph and 13.17 - 13.4 sec. 1/4 mi.

There could be other variables though which affected my times, like I had more work stuff in my trunk (which added another ~30 lbs.), I had 3/4 of a tank of gas today (during my best timed runs, I had ~ 1/2 tank of gas), and it's hotter and more humid today (~ 83 degrees F & ~ 60% R.H. vs. 77 degrees F, ~50% R.H.).

Anyway, my feeling is that hypothetically and technically-speaking, your best times may in fact come if you short-shift with the 335i, but it may not make that much of a difference.

The other thing to remember (for me and my situation) is that it's getting hotter and more humid here in S. Florida now. It will get really hot beginning in May and June, and won't really cool off until Oct. or Dec. So, I may not better my best times until next Winter. Don't worry, I'll keep trying though.

[sflgator]

Originally Posted by NaViT

my bad... where in Florida are u?

PB county, but I do A LOT of business travel down to Ft. Lauderdale and Miami, as I cover the S. FL territory for my company (Miami - Melbourne and Naples - Bradenton) and I have several accounts in the Miami area.

[BMWPower06]

i dont get it, every1 was promising sub 13 second 1/4s but i have yet to see one sub 13

[Driver72]

Originally Posted by BMWPower06

i dont get it, every1 was promising sub 13 second 1/4s but i have yet to see one sub 13

Well keep in mind that the car mags are getting 13.4-13.5 @ 104-106 mph for the car on average STOCK (manual car). Autos are probably .1 second and 1 mph slower.
This is CORRECTED times for sea level AND "ideal" atmospheric conditions.

Personally, I ran a 13.0 flat in an automatic sedan with just the PROcede and that was NOT correcting for elevation (and was on 91 Octane).
Correcting just for elevation it was a 12.96 second pass at 108.1 mph.
This is from a sanctioned NHRA dragstrip, not a GTech or similiar device!
This was also on only my 3rd run ever with the car (I have not gone again since)
So, technically, if you do like the magazines do and correct for elevation, that is in the 12's.

I'm proud and happy with that. As far as I know, I am the only person to get those kinds of times with just the PROcede on street tires, on 91 Octane, with an automatic, and in the heavier sedan too.

Knocking off .5 to .6 seconds and adding 3-4 mph in the 1/4 mile with just the PROcede is pretty darn great and is as much as could be expected.
Knocking another tenth or so off and adding another 1+ mph would be cake with 93 Octane alone.

[IrishFlush03]

Originally Posted by Driver72

Well keep in mind that the car mags are getting 13.4-13.5 @ 104-106 mph for the car on average STOCK (manual car). Autos are probably .1 second and 1 mph slower.
This is CORRECTED times for sea level AND "ideal" atmospheric conditions.

Personally, I ran a 13.0 flat in an automatic sedan with just the PROcede and that was NOT correcting for elevation (and was on 91 Octane).
Correcting just for elevation it was a 12.96 second pass at 108.1 mph.
This is from a sanctioned NHRA dragstrip.
This was also on only my 3rd run ever with the car (I have not gone again since)
So, technically, if you do like the magazines do and correct for elevation, that is in the 12's.

I'm proud and happy with that. As far as I know, I am the only person to get those kinds of times with just the PROcede on street tires, on 91 Octane, and with an automatic, and heavier sedan too.

Knocking off .5 to .6 seconds and adding 3-4 mph in the 1/4 mile with just the PROcede is pretty darn great and is as much as could be expected.
Knocking another tenth or so off and adding another 1 mph would be cake with 93 Octane alone.

Damn! thats fast I have a FX-2 accelerometer, does anyone know how accurate those 1/4 times are? or the 0-60s?

[Driver72]

Originally Posted by IrishFlush03

Damn! thats fast I have a FX-2 accelerometer, does anyone know how accurate those 1/4 times are? or the 0-60s?

In numerous tests with accelerometer devices they range from relatively accurate (within a tenth) to pretty far off (6 or 7 tenths).
But they all pretty much read optimistic (ie: faster than true dragstrip times) in the trap speeds. They usually read .5 to 1.5 mph FASTER than what you'd do at a drag strip.

The main reason for this is a true drag strip averages your speed over the last 60 feet or so of the run. It does NOT give you your speed as you cross the 1/4 mile strip.

The other thing about the acceleration devices is you are NOT at a dragstrip. Most streets will give you better traction at launching than many/most dragstrips. Plus you don't really know if the road is level, AND you are not "in the game" with those devices. Meaning, you have all the time in the world to perfectly launch the car.
At the dragstrip, you stage and have to launch within a second or so.
You have hundreds of people watching, and you are lined up against another car that you really want to beat.

The pressure is on at the dragstrip, there's no pressure on a lonely road by yourself.
It's easy to shoot 10 free throws when you are on the court by yourself, it's a different story when you are "in the game."