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-   -   my first time at 1/4 mile track with smg (http://www.maxbimmer.com/forums/showthread.php?t=54055)

BADMASS///M3 05-15-2005 11:14 PM

my first time at 1/4 mile track with smg
 
since i bought my e46 m3 this was my first trip to the track and it was very disappointing but with practice i know i could master it.
1st run 14.8 @89.37 i took dsc off and floored it real bad hoping off the line then i let off the gas early because the line wasn't clearly marked :mad:
2nd run 15.0 @102.15 this time i took off in launch mode(much better take off)BUT shifting into 2nd the car didn't respond the first time alot of wheel spinning :puke:
3rd run 14.4 @102.59 took off in launch mode but shifted in to second early and hit 2nd gear at 3krpm(so i lost alot there)but definetly better. *mumble*
4th run 13.3 @114.43 the last run and definetly for the best of the day my only complaint is to much wheel spinning off the line *th-up*

i guess what i'm looking for is any ideas on my problem coming out of first into second and i want some new competion tires for the back of my car but they don't make them in 19'' i was looking at the nitto 555r but the biggest size are 17'' i want aleast 18's and if i change the backs should i change the fronts or leave the 19'' this would only be at the track not for street.I'm going back this wednsday night.

rico328i 05-15-2005 11:16 PM

nice!
 
well your last run of 13.3 is definitely about right. Actually quite good!!!

What were the temperatures? If you can convert in Celsius for us Canadians, that would be GREAT!!!

Also, did you experiment with tire pressure at all??

What tires were you using?

BADMASS///M3 05-15-2005 11:25 PM

my first run was about 10:30 am @15.5 c by the last run@ 2:30 it was 22 c
i didn't lower my tire pressure because i was affraid the tires are so low profile i didn't want anything to happen to the rims and i was running the stock pilots.Also i need to mention my only mod is software upgrade(dinan)

tlaselva 05-16-2005 12:17 AM

If you have the SMG tranny, try using the built in feature 'Launch Control'.
It'll automatically modulate your clutch so it won't let it turn more than 10% faster than your front tires. Nice controlled computer launches. You should be able to get 2.0's to 1.9's on your 60's. Actually, your first 60 ft. times is the most important part of your run.

Read up on the LC here...Site Link

If you want to run the car yourself, you can't just FLOOR it off the line like some ricer with 100 ft. lbs. torque. Learn to feather the throttle off the line in first. Once in second, your car should have enough grip to take full throttle. You may think spinning your tires is cool, but you’re inevitably killing your run.
With SMG paddles, there's no chance of miss-shifting. The M3, especially with the SMG is not a difficult car to learn how to run well down the quarter.
All you really need to learn is to modulate your throttle in first, and click the paddle once your car's at 7900 rpm in every gear......

BADMASS///M3 05-16-2005 01:16 AM

thanks for that info it was very informative i used Lc in my 2-4 runs but until now i didn't realize i was doing it wrong it was explained to me to put my foot on the brake litely and let it off as i hammered on the gas always a smoke show.After reading that site i'll have to work on that new method.As for not being able to make a mistake in my second run with my wheels spinning i tried shifting into second (with the lever) when it hit 8k rpm but it didn't respond so i lost a lot of time there.Only in my last run was my 60 time under 2 (1.81)very little spinning.So i'll try it this way and wait on changing the tires until after this wednsday.

tlaselva 05-16-2005 01:34 AM

Quote:

Originally Posted by BADMASS///M3
thanks for that info it was very informative i used Lc in my 2-4 runs but until now i didn't realize i was doing it wrong it was explained to me to put my foot on the brake litely and let it off as i hammered on the gas always a smoke show.After reading that site i'll have to work on that new method.As for not being able to make a mistake in my second run with my wheels spinning i tried shifting into second (with the lever) when it hit 8k rpm but it didn't respond so i lost a lot of time there.Only in my last run was my 60 time under 2 (1.81)very little spinning.So i'll try it this way and wait on changing the tires until after this wednsday.

1.8 short is a very respectable time on stock rubber.... *th-up*
I'd be weary about going to a DR or a R compound tire.
I'm not sure the SMG tranny is built with an 'overhead' to handle the extra stress a sticky tire would inevitably place on your tranny.
But if you’re willing to take the chance, then go for it!

Keep us updated on your runs!

felixthecat 05-16-2005 02:08 AM

Get some snow tires if you want a little better grip on the track without going to slicks,or BFG makes the Drag T/A,i think you cant get them in almost any size...

AMG_POWER 05-16-2005 05:22 AM

13.3 @114.43 is that 114 mph???

I think that's too much for an m3, E55 runs 115 116 mph...?!

tlaselva 05-16-2005 09:51 AM

Quote:

Originally Posted by AMG_POWER
13.3 @114.43 is that 114 mph???

I think that's too much for an m3, E55 runs 115 116 mph...?!

I think it's safe to assume it's a typo.
I'm sure he meant 104.43 mph, which is where a generally stock E46 M3 would be.

grossi 05-16-2005 05:59 PM

Quote:

Originally Posted by tlaselva
I think it's safe to assume it's a typo.
I'm sure he meant 104.43 mph, which is where a generally stock E46 M3 would be.

True, a 104.43mph run is much more realistic for a stock M3. Tony, I know you run your 'Vette, so I know you would obviously know a lot more than I would. Anyways, I have a question: I was reading on e46fanatics.com about the quickets 1/4 mile times for e46 M3's. Anyways, some dude hit like a 12.5 second run. My question, is this... Would an SMG transmission be extremely hindered or unable to handle a supercharger on the M3? The reason I'm asking is that a guy who ran a 12.7, had a supercharged M3, and mentioned that if he had a 6-speed he could have lowered his 1/4 mile time. I guess my question is: What would be more effective with a heavily modded engine - an SMG transmission or a 6-speed manual? I thought I'd ask, because I know you have experience with these sort of things!

BTW--- My take is that a manual transmission would be more effective. At the end of the day the SMG transmission is an offshoot of an automatic transmission.... which may mean more power loss? I'm not 100% sure though...
- Adam

BADMASS///M3 05-17-2005 04:06 AM

Sorry my bad 104.43 didn't me to cause such a stir.By the time i get home from work(restaurant)16hr days i'm seeing double.I'm going on wed afternoon i'm sure the results this time will be much better especially on my 60.I'll post that night when i get back.

sthomas 05-19-2005 06:00 PM

The SMG is not an automatic at all. It is a computer controlled Standard trans. No torque converter!

As for SMG VS Manual - I'm not sure. However, if the SMG keeps rear tire's within 2% of front there may be room for improvement. My understanding is that in dry weather you get the most grip at ~15% wheelspin. That's obviously an average for street tires.

Anybody have real numbers for this comparison?

BADMASS///M3 05-19-2005 10:08 PM

ok here we go!
wednsday night lebanon valley up state NY
overall much better results i only got four runs in.
1st run 15.5 @102.21/3.3 60 totally not my fault i tried avoiding the water on my way to stage and the guy with the hose got my back tire(my friend behind me told me after)i launched sideways as you can tell the announcer was cracking on me especially being the only bmw there :puke:
2nd run 13.7 @103.15/2.1 60 i was doing back flips after that first run *th-up*
3rd run 13.4 @103.87/2.0 60 :)
4th run 13.6 @103.56/2.1 60 :D

over all i'm very happy with the consistencey of the runs i know i can get my 60 down to 1.8-1.9 i just need to get comfortable launching my car i was bringing the rpm's up to 2000-2800 then launching i'm just not sure how high i can bring them(can i bring my rpm's as high as i want with the lever pressed foward with out it going any where until i release it)? next time i go i want to get my time into the low 13's every time.

BADMASS///M3 05-19-2005 10:13 PM

Amg Power!
 
o yea AMG power you want to talk about some sick amg power there was an sl65 there pretty sick except the guy was a punk and he total didn't deserve that car there was also a sl600 with dealer plates on it (NICE!) and a porsche turbo s convertable( cool guy good driver).

tlaselva 05-20-2005 02:07 AM

Quote:

Originally Posted by BADMASS///M3
ok here we go!
wednsday night lebanon valley up state NY
overall much better results i only got four runs in.
1st run 15.5 @102.21/3.3 60 totally not my fault i tried avoiding the water on my way to stage and the guy with the hose got my back tire(my friend behind me told me after)i launched sideways as you can tell the announcer was cracking on me especially being the only bmw there :puke:
2nd run 13.7 @103.15/2.1 60 i was doing back flips after that first run *th-up*
3rd run 13.4 @103.87/2.0 60 :)
4th run 13.6 @103.56/2.1 60 :D

over all i'm very happy with the consistencey of the runs i know i can get my 60 down to 1.8-1.9 i just need to get comfortable launching my car i was bringing the rpm's up to 2000-2800 then launching i'm just not sure how high i can bring them(can i bring my rpm's as high as i want with the lever pressed foward with out it going any where until i release it)? next time i go i want to get my time into the low 13's every time.

Nice runs!

A few things you can try to improve your 60's is to do a small burnout.
Should warm up your tires, and make them stick much better off the line.
Also, try on a sunny day, as the sun will warm up the road further adding to traction. I noticed an average improvement of .1 to .2 on my short on a sunny day, compared to the evenings.

If you use launch control, your RPM's are programmed to hold at 1800 rpm when you floor it with the SMG knob held forward. Just make sure you’re in M6, and traction control off. All you have to do is to let go of the leaver, and off you go, and get ready to shift cuz that 8000 rpm comes up awfully quickly!


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