[sflgator]

Originally Posted by BMWPower06

See the thing is, with DSC atleast in my car, as soon as it senses a little bit of wheel spin it cuts power and applies the brake, could never ever get a good launch with DSC switched on, when fully off it doesnt interfer at all, and a little wheel spin never harmed anyone. I think that with DSC fully disabled and 1500-2000 RPM TQ rev will def yeild a quicker time.

Hey, I'll give it another shot later in the week. But, with that said, I also don't want to fry my brand new Michelin PS2s in just 1 day; these things cost almost $1,300. I'm interested in knocking off a couple 10th's of a sec., but I also want to enjoy my PS2's for a while too.

[BMWPower06]

Originally Posted by sflgator

Hey, I'll give it another shot later in the week. But, with that said, I also don't want to fry my brand new Michelin PS2s in just 1 day; these things cost almost $1,300. I'm interested in knocking off a couple 10th's of a sec., but I also want to enjoy my PS2's for a while too.

ive never played with a proceded 335i, but im pretty sure ur tires will gril before the end of first, 1500-2000 isnt too high.

[Clem]

Originally Posted by BMWPower06

See the thing is, with DSC atleast in my car, as soon as it senses a little bit of wheel spin it cuts power and applies the brake, could never ever get a good launch with DSC switched on, when fully off it doesnt interfer at all, and a little wheel spin never harmed anyone. I think that with DSC fully disabled and 1500-2000 RPM TQ rev will def yeild a quicker time.

Ain't that the truth. I had a little run with an new Acura TL Type S the other day in my Proceded 335 manual. We both hit it in first gear and I immediately put 2 cars on him, well on my way to blowing him away. Then when I ripped 2nd gear and it felt like I had thrown out an anchor! Brakes applied + throttle cut = someone threw a wet blanket on me. I had hit the DTC button once and still I got major intervention. When I really want to cause trouble, I disable the whole system. Maybe things are different with the Step.

BTW, those new TL's (286 hp) are fairly quick.

[Inkidoo]

Originally Posted by sflgator

No, I think it may actually be very accurate; my car currently has an additional 57WHP and 92 lb.-ft. RWTQ with the XEDE.

Yeah, I'm aware that the stock 335i's are running ~ 4.8 sec. 0-60mph and ~ 13.4-13.6 1/4 mi. @ 105mph; so, I was a little disappointed but again, I only did a couple runs and from the right side of the highway (emergency lane), so I had to go over those speed bumps (cuts) and pull to the left onto the highway's right lane...it was a little awkward since I wasn't technically going completely straight. Also, I'm fairly confident I can get a better launch too.

I guess I was just more impressed by the accuracy of the Beltronics Vector FX1, knowing that my XEDE-equipped 335i should be faster than a stock 335i, but only by a few 10ths of a second.

So... You have a XEDE with 57 Wheel Horse Power more and 92 lb.-ft. more, and you are planning to install the procede? I thought the Procede only around 50whp and 70 Torque, why will you change to Procede having more power with your setting?

[Evo8MRto335I]

sflgator,

I never tried the belltronic, however I do have a G-tech pro. For the last 3 years I compared the G-tech pro numbers agaisnt real dragstrip testing.
Generally I find the G-tech to be optimistic by at least a couple of tenths ) and also a couple of miles average (trap speed).

It is not a the data of a single car but an average of my last few cars I owned in the last 3-4 years. I compared some of the timeslips and again, they are off by a little bit.

You might be right, your car has more power and torque but keep in mind these type of devices are optimistic.


Last but not least, the numbers you obtained are excellent.
Carlos

[max boost]

Originally Posted by sflgator

I'm sure the GPS unit is more accurate, but it seems like the Beltronics Vector FX1 is fairly accurate as well...maybe within a few 10ths of a sec.

I know that someone here who has or had a C5 Corvette (which he took to the track) said he also has a Beltronics Vector FX1 or FX2 (same internal electronics) which he said is very accurate...within a few 10ths of his track times.

thats me


yes i had it at the track and it very very close:rocks:

little bumm'd on his #s...this is what i did... http://www.e90post.com/forums/showth...ght=beltronics

very cold that night....i think it was around 30 35*

[sflgator]

Originally Posted by Inkidoo

So... You have a XEDE with 57 Wheel Horse Power more and 92 lb.-ft. more, and you are planning to install the procede? I thought the Procede only around 50whp and 70 Torque, why will you change to Procede having more power with your setting?

The PROcede-equipped 335i running on 93 octane is seeing gains of ~ 60HP and >100 lb.-ft. RWTQ! So far, all the XEDE beta testers who have now switched over to the PROcede have nothing but positive things to say, especially regarding it's smoother power delivery through the entire rpm range and increased TQ. In addition, the PROcede install is solenoid-less, cleaner, and more stealthy than the XEDE. Shiv is doing this for us XEDE beta testers at n/c, so I figured why not? I should be getting my PROcede later this week or early next; I spoke with Shiv today and he said he'd call me tomorrow.

[sflgator]

Originally Posted by max boost

thats me


yes i had it at the track and it very very close:rocks:

little bumm'd on his #s...this is what i did... http://www.e90post.com/forums/showth...ght=beltronics

very cold that night....i think it was around 30 35*

Hey, thank you for chiming in; I knew you'd come around. Yes, I reviewed your thread again, and those were some very decent numbers you saw with your stock 335i. Although I don't recall the number now, I believe my 60ft. time was better than your 1.88sec. I'm not bummed at all about getting 4.58 sec. 0-60mph, although ultimately, I think it should be ~ 4.4 sec. or so; I am however, a little disappointed in the 13.12 1/4 mi. time and 106.4mph trap speed though, but again, I think that's b/c of 1 bad shift at ~ 80mph or so.

I'll try again soon with a few different parameters; e.g. DTC completely off (press & hold), DTC on (quick press of the button), DS, M1-M4, etc. I guess only then will I know exactly what can be duplicated and what works best. Plus, I'm fairly certain I can get in the high 12's for 1/4 mi. time with a trap speed closer to 110mph.

Either way, it seems apparent that this Beltronics FX1 is fairly accurate and my times are getting closer to what I expect from my XEDE -equipped (and soon PROcede-equipped) 335i Coupe. :rocks:

[musc]

Originally Posted by sflgator

Hey, thank you for chiming in; I knew you'd come around. Yes, I reviewed your thread again, and those were some very decent numbers you saw with your stock 335i. Although I don't recall the number now, I believe my 60ft. time was better than your 1.88sec. I'm not bummed at all about getting 4.58 sec. 0-60mph, although ultimately, I think it should be ~ 4.4 sec. or so; I am however, a little disappointed in the 13.12 1/4 mi. time and 106.4mph trap speed though, but again, I think that's b/c of 1 bad shift at ~ 80mph or so.

I'll try again soon with a few different parameters; e.g. DTC completely off (press & hold), DTC on (quick press of the button), DS, M1-M4, etc. I guess only then will I know exactly what can be duplicated and what works best. Plus, I'm fairly certain I can get in the high 12's for 1/4 mi. time with a trap speed closer to 110mph.

Either way, it seems apparent that this Beltronics FX1 is fairly accurate and my times are getting closer to what I expect from my XEDE -equipped (and soon PROcede-equipped) 335i Coupe. :rocks:

Just exactly what happend when you had a bad shift? If you were shifting into 4th at 80, you were shifting way too soon. Even at about 6500K RPM shift point, you'd be hitting mid 90s. If you short shifted by that much, it will kill your ET and MPH, because your 60ft and 0-60 sound pretty good. Are you running 265/30/19s? With 1.52 3rd, approx 25.3 tire height, 3.46 rear and 80 mph would put you about 5600K. If you shifted there, your trap speed will be down. Not mention driving on top of those speed bumpy things isnt conducive to a best run.

Pretty good initial test though. Find yourself a nice flat piece of road and you should record some 12s.

[kujo]

Originally Posted by sflgator

I'm sure the GPS unit is more accurate, but it seems like the Beltronics Vector FX1 is fairly accurate as well...maybe within a few 10ths of a sec.

I know that someone here who has or had a C5 Corvette (which he took to the track) said he also has a Beltronics Vector FX1 or FX2 (same internal electronics) which he said is very accurate...within a few 10ths of his track times.

They are more accurate in longer distances, yes.
Only a few 1/10ths in the 1/4 is less of a worry than that same percentage of error in 0-60 times.

It's a great tool and fun gadget don't get me wrong.
As I said, I've bought the GTech PRO SS and this Escort GTimer as well.

But, put up against the GPS unit, the GTimer was almost a full second off.

just observations from many, many, many runs with them.

Have fun and be safe, that's most important.

kj

[sflgator]

Originally Posted by catm3

Just exactly what happend when you had a bad shift? If you were shifting into 4th at 80, you were shifting way too soon. Even at about 6500K RPM shift point, you'd be hitting mid 90s. If you short shifted by that much, it will kill your ET and MPH, because your 60ft and 0-60 sound pretty good. Are you running 265/30/19s? With 1.52 3rd, approx 25.3 tire height, 3.46 rear and 80 mph would put you about 5600K. If you shifted there, your trap speed will be down. Not mention driving on top of those speed bumpy things isnt conducive to a best run.

Pretty good initial test though. Find yourself a nice flat piece of road and you should record some 12s.

Not sure if the one bad shift was in 3rd or 4th, and yes, my runs on Mon., 3/19 were on a different road w/o the rumble cutouts (speed bumps)...btw -- yes, my Mich PS2s are 265/30/19 rear and 235/35/19 front, and ALL the roads here in S. FL are flat.

[Vinobien]

dude - still waiting for the PROcede? I thought beta testers were first in line.

[sflgator]

Originally Posted by Vinobien

dude - still waiting for the PROcede? I thought beta testers were first in line.

I believe all of us that were part of the S. FL XEDE beta tester group are still running with our XEDE, waiting for the PROcede upgrade. I spoke with Shiv on Mon. though and he said it should be shipping shortly.

[Vinobien]

thats great. Thanks to you gents the design was finalized in a prompt manner laying the groundwork for what we have today. You gents are pioneers and should be treated with the respect you deserve.

[PresaMat]

Originally Posted by kujo

They are more accurate in longer distances, yes.
Only a few 1/10ths in the 1/4 is less of a worry than that same percentage of error in 0-60 times.

It's a great tool and fun gadget don't get me wrong.
As I said, I've bought the GTech PRO SS and this Escort GTimer as well.

But, put up against the GPS unit, the GTimer was almost a full second off.

just observations from many, many, many runs with them.

Have fun and be safe, that's most important.

kj

What GPS unit are you using?

[kujo]

VBox Performance Meter
It's a newer, smaller version of what all the car mags use.

kj

[hotrod182]

Originally Posted by sflgator

No, I think it may actually be very accurate; my car currently has an additional 57WHP and 92 lb.-ft. RWTQ with the XEDE.

Yeah, I'm aware that the stock 335i's are running ~ 4.8 sec. 0-60mph and ~ 13.4-13.6 1/4 mi. @ 105mph; so, I was a little disappointed but again, I only did a couple runs and from the right side of the highway (emergency lane), so I had to go over those speed bumps (cuts) and pull to the left onto the highway's right lane...it was a little awkward since I wasn't technically going completely straight. Also, I'm fairly confident I can get a better launch too.

I guess I was just more impressed by the accuracy of the Beltronics Vector FX1, knowing that my XEDE-equipped 335i should be faster than a stock 335i, but only by a few 10ths of a second.

I always take my Gtech to the track and compare the times with the track light. I have had the MPH within .001MPH, and time generally within a tenth of a second. Its pretty accurate. At sea level, cool air, my best times are displayed on the following graph. The white box (black line) shows the 335i, and the red box (red line) shows the M3. At the track, poor conditions I got 13.55@104.1 in the M3 qtr mile, and the GTech reflected that time almost identically. Make sure you don't make runs were there is a slope, and make sure the pavement is as smooth as possible. Once you find the ideal stretch of road, always start at the same spot on that same road to make useful comparisons. I think the Gtech Pro is much more accurate than most others, as it has a 3 axis accelerometer. I am constantly testing and analyzing data with my cars. You will know if a run is an aberration after you have more experience, and you will know which runs to throw out if any. After you make dozens of runs, you will know what your car is running, it is amazing how consistant a good run will be compared to other ones in which you don't have launch problems, etc. Compared to the Vbox, the Gtech might be off .5mph, and the VBox .25mph, and on the ET, the Gtech was within .10 second, and the Vbox, about half of that. So while the Vbox, is not perfect, it is very accurate, and consistant. And for a fraction of the price...the GTech Pro is amazingly useful. as Car and Driver said: "Judging by this current crop of performance meters, however, we find that the VBOX’s advantages are being challenged. We won’t be benching it anytime soon, but we did find that people with much less than $11,800 (the current price of a VBOX) can buy a meter that provides some amazingly good results. As a measuring device for a single car, most of the meters are quite good...."

Just make sure you calibrate the meter properly, and have a good feel for it. The G Timer was not very consistant, and I didn't see anything on the Beltronics...so hopefully someone can take one to the track and find out how it performs..If I thought the VBox was that much better to make a useful difference for the price, I would seriously considering buying one. But the accuracy and resolution that we are talking about is smaller than the variances that often occur from track to track, same track temperature changes between runs, different engine compartment temperatures, wind conditions, etc, etc, etc.

Im sure most of have seen the post, as there are over 8000 views of that thread...but in case you haven't, see my post on the GTech Pro vs the actual Drag Strip Printouts.....the post is about halfway down that page of the thread.
http://www.e90post.com/forums/showth...t=49135&page=9

But overall, I think the Beltronics time is probably right in line with what we have been observing. But you can now see how impossible it was to believe those 120mph terminal speeds from old GTech! One thing you will discover is that you terminal speed is the best indicator of your horsepower. It will be more consistant than your ET which can vary so much at the launch. Also, my speeds below represent the best possible conditions for horsepower...cool 48F sea level conditions...but what a difference it makes. The same M3 that is doing a 13.099@107.58 on the graph below was doing a 14sec@104mph just earlier in the day at 2700Ft elevation!

[BMWPower06]

so when r u plannin on doin another run with the DSC totally off, i cant wait to see the results

[serge]

So the $99 FX1 is more accurate than the $300 G-Tec Pro? I want my money back!

[sflgator]

hotrod182 -- Thank you for posting all that info; it's nice to have a second opinion from someone who's had plenty of experience with these types of products.

BMWPower06 -- Soon.

[FlyingFinn]

Originally Posted by hotrod182

I always take my Gtech to the track and compare the times with the track light. I have had the MPH within .001MPH, and time generally within a tenth of a second. Its pretty accurate.

Have you adjusted the pitch factor of your G-Tech?

[hotrod182]

Originally Posted by serge

So the $99 FX1 is more accurate than the $300 G-Tec Pro? I want my money back!

No no....the Gtech I was referring to was the old one...not the GTech Pro which was highly rated by Car and Driver. Remember, you probably would have a hard time clicking off anything quicker than a tenth of a second on a hand held stop watch..try it...these accelerometers are pretty darn impressive for the price. Plus you can superimpose any runs you want on the graphs to compare different cars, runs, etc. For example, you can easily tell the M3 runs with the distinctive shifts on the graph, compared to the smooth steptronic shifts (black line) of the 335i. Also, as long as you can get a consistant means of measuring your accleration, even if it is alway a .10 seconds/.50mph off, at least you will have meaningful information to see the performance gains of your vehicle when you do modifications, troubleshooting, etc.