That slip looks like a pre 1/4 mile trap light lift to me. Too bad there is no 1000ft E.T. That would be very telling.
Any chance the car just started Dumping boost on the top end the one log showed it dumping boost. The getting out of the gas sounds very likely as well.
Why would he lift during the run??? Said he’s been drag racing since a kid and he’s been there a few times with the S4. Don’t you guys keep hammering until well past whatever you think you’ll trap? That’s my rule of thumb for when to slow down.
OK
Drove car to strip burning down to zero on rangeometer and drove 5 miles past that. Put in 5 gallons 102 octane. Switched to REVO #4 setting, definite change in chirp sound to indicate success. Took my electric parking brakes out of trunk, darn they’re heavy, only to find the parking brake warning system limits launch control to 2000 RPM. Next run got some wheel spin, not due to 44 PSI but because it is difficult to avoid water on track applied for two wheel drive cars heating their tires. Did another run immediately after and no tire spin. Still, decided to drop down 2 PSI to 42 lbs. Density altitude was about 350 ft. Did screw up two passes with bad shifting technique. Also, don’t understand this, my last run LC failed and only went to 2000 RPM. Pulled over on the return road, didn’t touch a thing, and it worked fine. Euroswagr makes an interesting point I was unaware of, timing trap is past the lights. Could be poor operator technique on my behalf. Good news was I cut off just over half a second from my runs in May and June. The difference between the car now and then are only two items, Revo tune, DSG and ECU, and meth injection. Below are two more time slips. I’ve seen DAs in my area lately as low as -1500 ft. Got to wait for cooler weather I guess and make sure I keep my foot in it to the trap lights. Track says they will run every Sunday as long as temperatures are above 45F. I will not give up!
Those traps look a little better… As others have said you’re probably letting off early thus hurting ET a little and trap a decent bit… Also, why are you shifting? Put the car in drive with ASR/ESP off and let it do it’s thing… The DSG tune is what improved your times, not the meth and probably not the Revo tune, beside it letting you run the dsg tune…
Aren’t we also seeing the effects of much better DA?
I did both. If I’m not mistaken you don’t have LC? One must be in manual for launch control to operate. When I did my 0-60 runs with a DA of -1500 ft I get a rather strong snap at brake release. Not so yesterday…car was gutted of a reasonable amount of weight as well. Again, maybe wishful thinking…could have taken my foot out too early?!
Could be? Therefore If I wait until colder weather I will easily be in 11s, correct?
You sure manual mode needs to be enabled to get LC? I don’t see why they would do that. Pretty sure Ron has LC. The standard B8.5 launch control does not need to be in manual mode.
I wouldn’t say easily into the 11’s, 350 ft is pretty good. But comparing to your previous times in May and July must take into consideration the change in DA. I’ve seen a .3 second drop/2 MPH increase going from 1400 DA to around 0 DA.
Edit - also, don’t you drive around the water? The other guys got pissed (kindly told me not to do it again lol) when I drove through it on my very first pass. Never made that mistake again.
Well, I’m going to wait for the right day, which may take sometime. IE, going to be relatively warm here again today. Also, I’m going to remove my parking brakes again and see if they do affect LC? Yes, I drive around the water but it’s impossible to miss entirely as they spread it all over. No one has admonished me ever. Coastal Plains Dragway is a very laid back IHRA strip. May not impressed anyone on this web site but the locals think I have a fast car.
We also may have uncovered the mystery of the crappy APR tune. Driver decided to stop before the finish line. Because let’s look at this result
DA - almost perfect
Fuel - race fuel + meth (not sure why both, but hey…can’t say it’s bad fuel)
Mods - stage 2 tune, pulley, intake, hole in hood, LW wheels, catless exhaust…in other woods, the kitchen sink pretty much…and ‘car was stripped out of a lot of weight’…seriously? WTF.
Overall, this couldn’t be any better for running a great time. But he ran low 12s @ 110. Best case scenario, he fucked up, hit the brakes, and could have ruined a 12.0 @ 114.0 or thereabouts. So let’s pretend he ran 12.0 @ 114.
If he had posted this, anyone with a brain in their head who follows the B8 S4 would say ‘that’s crap, what’s wrong with your car?’. The owner would be pissed off because, again, it’s crap. The owner would arguably be started threads on other forums calling out his tuner because the car had the kitchen sink thrown at it , and underperformed signficantly.
Waiting for the threads against REVO similar to the APR attacks of earlier this summer…
Speaking of APR, he ran 12.67 @ 107 on the APR 93 tune, right? the DA here was 2000 ft better than last time. So that alone means about 20-25 whp . That means about 2-3 tenths and 2-3 MPH in itself. What was his old best time? 12.67@107 So that old time would be, in these conditions, around 12.4 @ 110. Factor in race gas (good for around 3-4 tenths/3-4 mph) and you’re looking at 12.1 @ 113 MPH to 12.0 @ 114 mph. Incidentally, his best possible time here based on 60’ and 330 and 1/8 would be 12.0 @ 114.
Anyone else thinking skypilot owes APR a big fucking apology?
You are also forgetting the beits from the DSG tune. Which should give an extra .3 seconds and 2 MPH from the thread Jim and myself made on how short shifting could “theoretically” affect 1/4 performance.
Saki, I don’t. You can parse yesterdays runs until the cows come home. There are far too many variables to consider, including me. The fact that I have a launch control that goes to about 4200 RPM as well as switching is reason enough, for me, to move to REVO.
LC I believe is enabled in Sport mode and Auto Manual modes.
No reason to not be in Sport mode and have car do it’s thing.
yes, you are a huge variable. The fact that you were driving through the waterbox, shifting the car yourself etc. prove the time and time again proposed hypothesis that you just don’t listen.
However, the forum can see the data and understand it for themselves. You ran, with REVO and all your goodies, almost EXACTLY as you ran with your ‘broken’ APR tune (and by ‘ran’ I’m estimating what you would have run if you hadn’t slammed the brakes before the finish line…if we use your actual 12.16 @ 110, you ran far worse)…so there’d better be hell to pay for REVO or else you’ll look like a huge, paid for hypocrite.
Sky, The only reason for switching to Revo in your case was to get the dsg tune, other than that you got a worse tune based on the logs I’ve seen and results posted by you and others… Actually, you should have went GIAC… I know they’re hours from your place… You’d have a tune that works the way it should and DSG software that works… I digress though and you definetly go to the beat of your drum and only yours…
great point. Even if it only helps 1 tenth, it’s just icing on the cake.
I actually did both. The thing that makes it tough to determine which is best is the failure of LC, more than once. I, obviously, have to better my technique and do some more research. There were about 60 cars there yesterday. I only got in eight runs. Each run was a learning experience. Yes, I drag raced as a kid, decades ago. Also it’s going on six months since the last time I was out there. At least I’m out there trying and providing some data. As I wrote, I will not give up until I crack into the 11’s. Thanks
Eight runs should be more than enough to figure this out.
Hell you have a DSG how much is there to figure out? I have a 6MT and have dragged it exactly 17 times and have figured out what needs to happen and I have never flown a plan in my life.