silvers2k

I decided to take my car out to the track to see what my car can run after getting the tune in anticipation of running low 11's @126-128. Needless to say, my track time was less than desirable. This was at a well prepped track with DA 2000ft. My mods are: "stage 2" tune (93 oct), catless downpipes, AFE high flow filters, and all-season tires (Continental DWS).

Based on my time slip, I am speculating that I'm not making nearly as much power as most people are making with similar mods. I understand I ran with street tires and my 60ft time was less than perfect....but @120???

I contacted the tuner based on my speculation and the response I got from him was, "are you a professional driver" (somewhat in condescending tone) lol.

Looking at my time slip and the track info, am I that bad at drag racing I'm only trapping @120?

I'm going to dyno my car this Friday on dynojet (recommended by the tuner) to prove that I'm not making the power I should be making with my mods.

Thoughts?

chiromikey

Your 60ft times are the main problem...they're bloody awful and you'd easily be in the low 11s with an appropriate launch. Part of this problem may be driver error but no one will do much better on all season tires. The other problem is the DA. Easily killing a couple of tenths and mph right there.

Proper tires, 1.7x 60ft time, and sea level DA snd you're low 11s and mid 120s all day long!

BerndV

I wouldn't think a density altitude of 2000' would matter much with a turbocharged engine. The turbos will spin a bit faster, but HP should remain the same.

chiromikey

You're probably right, DA won't matter as much but in combo with everything else I still believe helps explain the poor results.

PeterUbers

Launch technique?

Brake stall to 2500 and let it rip with traction off, s+, 41 psi all around

Some argue you may do better in comfort suspension mode

silvers2k

Brake torque 1500, S+, comfort suspension, traction control on, and 35F/30R PSI.

I know my 60ft time is not the best, but I think I should be trapping higher than 120mph.

PeterUbers

Traction on ---> solved

silvers2k

I wouldn't want to run with the traction control off. Plus, it's highly unlikely to make up for the 6-7mph difference in trap speed.

I've done my homework prior to going to the track and people turn off the traction control for a quick burn out but turn it back on before the launch.

Peter, I know your car is awd but have you ran at the track?

AHI

D - Dry
W - Wet
S - Snow

I guarantee a half second drop with ANY summer tire.

silvers2k

I think I remember reading someone local ran 11.3 @128 with winter tires. If you look at my timeslip for 12 sec run, the trap speed is not much different compared to the 11.8 sec run despite the .4 difference in quarter mile time.

AHI

The silica in a winter tire when warmed up, acts like a binding agent.... So yes great for off the line starts, but will create some sort of drag at higher speeds as it creates rolling resistance.

All season tires offer horrid off the line grip on high powered RWD vehicles.

PeterUbers

Awd yup, track many times not in this car yet... Just consolidating the data I've seen from anecdotes ... Are you awd? If yur rwd then I stand corrected

ced357

As others have stated, you certainly need better tires and TC off or at least sport. my best times for all my cars were achieved with TC off or sport.

Please don't be discouraged and try again, your car can be very quick.

vikingdiesel

is this tuner Chicago LOCAL?

chiromikey

Let's please not turn it into one of "those" threads...

vikingdiesel

nothing to do with that, why the secret? Why should the tuner be hidden?

chiromikey

I don't think he was hiding the tuner...but I also don't (yet) think there's an issue with the tune. Too many threads get derailed and too many people start unnecessary flame wars when tuner brands come up. Not saying that's what you were doing but threads get sidetracked quickly nowadays.

silvers2k

I'll just have to wait until Friday to get the car on the dyno to confirm. Will post my dyno on Friday.

Fairbird

You should be faster no metter what

kponti

I think traction control may have slowed you down the most. Continental DWS tires will not slow you down one measurable bit! I have had them on previous high powered cars with NO problem. It is used on modified Corvettes, M3s, Miatas etc etc on some of the local track days I have seen and those cars do things the E63 can only dream of.

screw991le

Agreed, practice your reaction time and pedal response, any tire spin or traction control will kill your 60 foot times.

kponti

Reaction time has ZERO bearing on your ET and certainly not your trapspeed. You can sit at the green for an hour and pull a mid to low 11second time at 126-130mph

Another edit, All season tires especially of the continental variety have been used to cut 1.7 to 1.9 60 footers for years now (not on the E63 chassis I will admit)

And let us not ignore the elephant in the room, more often than not, wheelspin results in crappy quarter miles times but higher trap speeds (which his is NOT). All within reason of course

screw991le

Yeah, thanks, with 30 years of racing under my belt.

(Laymen's terms) Reaction time is your ability to watch the light and practice against the light, so if you freeze and then hammer the throttle on full green you already .5 seconds to late. I know it has nothing to do with your trap speed or time. But it helps you launch better and get the tires to the ground for a better or great 60 foot time.

Trap speeds also have to do with shifting, is he leaving it in C? S+ Manual mode? Is the traction control on? Sport? or totally off?

To many factors to mention. Was it a pro tree? 1/2 tree? Did you drive through the water box, drive around it? Brake load? Hold mode? Drag rads? Tire pressure? etc.

I have raced everything from my friends Honda to teach him how to drive, To a 9 second pro-mod that a buddy owns. I have my licenses in 5 different categories and a SCCA ama-mod lic.

Unless you are there watching and logging data and such, it's called bench racing. Yes the OP has a problem, I don't think it's in the power department. Its in the experience department.

You have have a F40 vs. a Honda civic, if the F40 driver is a person with more money than brains, and the civic driver is more experienced, the guess what?, the civic driver wins hands down. Just because you have a 600hp car with a 0-60 time of 3.7 seconds, Does not mean every time you hit that gas peddle the car will go to 60 in 3.7 seconds.

Rant off

chiromikey

I will be the first to admit that a (slightly) higher 60ft time often yields a better mph but not a 60ft time that's almost a half second off the pace. That's going to kill both et and mph.

kponti

A 2.0 60' is not exactly half a second off the norm or we would have seen low 10 second times by now. The average tuned 4wd 60's I have seen both at the track and online has been around 1.7/1.8 secs (RWD ones are worse). Yes I know 1.8 to 2.0 is an eternity in drag racing, but not enough for a 6 to 8 mph drop in trap speeds