I took an early flight home today and decided to drop $15 on Wednesday night drags. I mostly wanted to just log the parameters Primetime mentioned in the Revo 100 thread. I only got two runs because a car busted their diff and by the time they finally had everything cleaned up, I was ready to go home. The first run I ran a 12.95 at 108.8. The car had about 3/8ths of tank of 91 octane gas. The DA was about 1200 feet at that time according to dragtimes. I didn’t remove anything from the car and I weigh about 215. So take this for what you will about Sacramento Raceway. I’m happy to have joined the 12 second club.
The next run was exactly one hour later due to the broken car and track cleanup. It felt like things were going fine, but when I shifted to 3rd gear, the engine rpm dropped to about 5k like normal, but it felt like it had no power and stopped accelerating. I kept the gas floored and it eventually slowly started accelerating and then started to pick up faster and faster. I’m not sure if I kept it floored through the end because I already knew the run was shot. Not knowing what happened, I decided to go home at that point. The car drove home fine though. Wasn’t there a 2-3 shift hiccup with the APR tune? Does what I’m describing sound like it? I was worried that I broke something. No dashboard lights came on.
For future reference, when you are in gear and revs wail but the car doesn’t go anywhere, get off the gas. Could be clutch slip and you could be destroying the clutch.
Good to see a 12 second run. Want me to add this to the list or wait till you go again?
getting there, Skid…I’ll look at the logs when I get to work. It’s too bad you got so few runs in, for a LOT of people, myself included, the first run is usually a dud, and your second run was already faster.
I agree, think it is the shift delay that Tsivas mentioned was fixed in v2.2, Rich had that I believe…
Your times are weird. On the second one you were a bit quicker to 330 feet but unfortunatley the shift hang caught you.
On the first one, your 330 time puts you on pace for about 13.10, but then you ran 12.95 somehow. Even your 1/8 time has you on pace for 13.05, yet you ran 12.95.
What this says is that your numbers are either not from a MT6 B8 S4 (obviously not the case here) or you are losing a bunch of time in the first half of the track. That appears to be the culprit with still high 60 foot times and slowish 1-2 and 2-3 shifts. Basically once you’re in the final 1/8th, the car acts as a Cali 91 tuned B8 S4 should run (because there’s no tricky AWD launching or gear changes for most of the second half. However the first half is costing you lots.
Can you walk us through your launch technique?
rpms you’re launching from?
ESP all the way off? Or half off? Or on?
are you slipping into the launch or just sidestepping the clutch (dropping it) and going in a blast?
any wheelspin?
are you deep staging or shallow staging?
Basically your car should be running 12.70 @ 110-111. Keep at it with a better launch and with crisper shifting, and you will.
if the power cut on the shift and you didnt hear/smell/feel the clutch slip and it felt “electronically limited” that is in fact the APR hang up issue. v2.2 does fix that issue.
on a separate note… you broke into the 12’s on a 91 tune running 91 octane gas… : lol
Skid, Congrats on the 12 second pass and also glad you are keeping at it…
I just glanced at the logs as I have a meeting I need to go to but I’ll take a closer look later as I am sure J will… Couple things caught my eye… The accelerator position seems low, not sure if that is a 6-speed thing? My car always reads 94 at WOT and your’s reads 80… Timing seems good considering the gas but you are getting a bunch of timing pull on the back half of the track… IAT’s are not high by any means… Boost seems adequate… you didn’t log bypass? Also, sampling rate is relatively low… Try to remember to hit turbo mode and group by(I think that is what it is called, it’s a little check box)… Like the others have said I think you need the update from APR to v2.2 or whatever it’s called, boost drops way low on shift and I don’t see that with the DSG…
I’ll check out the throttle position. That’s something I can log alone in any gear near the house. I didn’t log all of the parameters you indicated because I couldn’t find them all. I wasn’t even sure I correctly logged what you asked because some of them have different names and they all have different numbers. I checked the “group by” box, but turbo mode would hang the software, so I didn’t use it.
It certainly wasn’t clutch slip. When I engaged 3rd and released the clutch pedal, it dropped from 7k to 5k rpms and then just sat there. If the clutch was slipping, the rpms would have shot up. I also had absolutely no burnt clutch smell. On my last car, I had the clutch start go and would slip under load when upshifting, so I’m familiar with the experience.
When the light turned green, I gave it partial throttle. I wasn’t paying attention to the rpm range, but it was probably somewhere between 2500 and 3500 rpms. I know I should ignore the lights, but it’s kind of fun to use them.
ESP/ASP is all the way off. I press the button and it turns off half way, and I hold it until it turns off all the way. This time I also remembered to put it in dynamic mode.
I’m quickly lifting up on the clutch pedal while I mash the gas. I don’t feel comfortable stepping off the clutch sideways.
I’m not sure if there’s wheel spin. It’s kind of a bumpy start. If I could go with a friend, they might be able to tell me from outside if my wheels are spinning.
I’m shallow staging (The one where I barely trip the second light and give myself that extra foot to launch).
That’s why I was bummed about the second run. Looking at my slips, it looked like I was on pace to beat my first run.
It wasn’t clutch slip, but you’re right, something could have been broken and I would have only made it worse.
You can add it to the list if you like. I didn’t bring the gopro this time since logging and getting my start routine down were already enough steps to take. The only time I would be concerned with the list is if I start being competitive with other cars because then it would be fun to compare. Until then, I’m just having fun setting personal bests no matter how slow they are. It felt good to get in the 12s when I noticed that the dial in times on all the other cars were high 13s to high 17s.
I don’t have the latest flash. My flash is 14 months old.
I checked the version before going out and it was 11.11.5. I also sat in my driveway looking for the parameters you mentioned. That’s when I hit the turbo button after selecting parameters. Once I did that, it stopped responding to button clicks and I had to kill it with the task manager.
I wonder if the problem is associated with hardware, a bug in their software, or with the ECU version it’s connected to at the time. Maybe it’s worth me getting a new core based laptop instead of this atom based tablet.
Arin, any news on the B8.5 tune soon to be released?
Is it in final stages, is it in beta testing, etc. Would be nice just to get an update, and know you guys are working on it (I know you are busy with stage 3 and dsg software)
How old is your PC? I know my old PC (5yrs old) can only log 4-5 fields at once anymore and it freezes. My newer PC (1yr old), using the same version of software, can log 10 fields (maybe more) at once no problem.
lol