Axel blew his MAF :-[
The M3 struggled with traction off the line so couldn’t get out of the 13’s but trapping 111+ MPH.
actually he ran in the 12s a couple of times (see below)
I raced the M3 a bunch of times. His traction issues were monumental. On the one run where he got traction, he ran 12.87 @ 112 or 113 (can’t remember). I ran 12.88 @ 109 on that pass, so he pipped me by 1 / 100th! But for him, coming out of an RS4 that ran 12.2 @ 112 or so it is interesting to get his perspective on how SPOILED we are in these Audis…traction is fraknly incredibly important for performance. Even in perfect conditions the M/AMG guys can get loose and are forced to back off the throttle, when they’re getting on it. It’s a different game.
My best was 12.83, so I won the friendly bet we had (3 Morning Fresh air fresheners).
His car is fantastic, and his 114-115 MPH trap speeds later in the day show that even with just a tune and piggies, the M3, like the RS4, responds VERY well. I have never seen an M3 at the strip on a cold day like yesterday…they just don’t bother because they get zero traction. If they do bother, it is with a set of drag radials, but he is kind of like me in thinking that he just cares what the car can do in it’s ‘native’ form. Pump gas, street tires, full interior.
As for the Ecode shifter, he had it installed, then adjusted it because it wasn’t right. He still couldn’t get it right. Happens a lot with the shifters…install can be a bit meticulous.
[quote=“primetime,post:18,topic:3867”]
Hey PT…
Straight race gas… Mark II 110 octane from Profuels, our local supplier.
Bear said he had it on 104 tune, which I didn’t know existed, until recently. But looking at the log, is it really much different?
I wish we had the road circuit open to us, to warm the tires. I had no real grip issues with the S600 because I could do a proper burnout. With Bear’s car, when I tried I found I could spin the tires almost fully to redline in first gear, in the empty staging lanes.
Lol hey Saki that’s a massive difference - the wheelspin you get in 100-tune, compared to 93, can be epic.
Good luck Prime, hope you cut that 11.5 in the coming weeks. Note that bear had no issues with traps when running very low pressures (23!!), maybe that’s worth a try for you too. Although i cant see how your 60’ needs improvement.
the race gas really showed up yesterday. He picked up good MPH that’s for sure. His best MPH on pump was the windy day a year or two ago…around 114-115. Yesterday he was 119. Still, he has mods on his car now that he didn’t have then. Not sure if that was V2 etc…and he didn’t have the CPS back then.
p.s. why do you bother doing a burnout in staging? You’re going to get your tires nice and warm and ready to pick up a million rocks on the way to the actual strip. They’ll also cool down real quick, especially when you have to cover 50 yards of pavement with a surface temp of 3 degrees before you stage the car. If I feel the need, I do a quick rip just before I stage it. The track guys always seem to think I’m a retard failing at doing a full on burnout lol.
Saki, gotcha… Yeah RWD in those conditions is spin city… I used to run 315 DR’s on my mustang and even with a good burnout on a day like yesterday it would have been a challenge through 1st and 2nd… You actually have to drive the car not just point and shoot like my S… lol
J, Thanks! yeah I have the 104 tune so I’ll give it a try… I’ll run the Shell URT Advanced… Bear and Ryan’s traps are making me look slow:) I didn’t get a chance to look at the logs yet… How did they compare to mine I sent you last time… More or less timing? I would assume more with the trap and the higher octane rating…
Well it is actually supposed to be in the 50’s next weekend so traction will be fine…I’ll mess around with it either way though… Hopefully, I get a nice dry cold day with some sun the week after but you never know this time of the year… I bet yesterday makes you want to get the S4 back and running! lol
George in the M3 actually chirped going into 4th on one of his runs lol
Without the CPS he was 12.22, Good Friday, then you guys went again with the CPS, I think he did 12.12(?). So again it’s a massive 0.36 sec and 4 mph improvement…LOL.
warming up the tires…Lol, your experience …don’t worry what they think, so long as it’s safe and nobody’s close. The return road is another option. On APR S2/100 I can spin them significantly within 10 yards. Try it again right after, and it grips better. The heat holds longer in the tires than you think. Anyhow I did get a 1.71 60’ in Bears car, and fared much better on RWD than your BMW friend who had problems with his launch because he wasn’t really doing a burnout…(TC?). Mind you, thats why I used a set of sacrificial tires. I had enough rubber on my fenders from 6 runs to hide the paint. From what i could see, everyone needed more heat in their tires.
I’m not questioning burnouts…just questioning doing them in the linup lanes rather than doing it RIGHT before you run on the actual track. I guess you’re saying you do both.
You have to also remember, doing an AWD rip like I do once in a while isn’t good for the manual transmisison guys (clutch). Heating it up and potentially glazing it 5 seconds before you use it to launch the car can cause a weak piss poor launch or some slip.
p.s. have any videos of these burnouts?
Good point on the clutch. That’s a weak point for you guys for sure.
Just a quick spin. Nothing drastic, maybe nothing anyone would notice in my car with a stock exhaust.
I wish someone had some vids of the burnouts after I disabled TC and got the car in Dyno mode. That was fun, every time, making everything disappear behind me.
Prime, ignition timing may have been the same than yours, I have to compare where RPM and intake pressure align. Your tune stays up at 24-25 degrees but you don’t generate as much pressure at your elevation. Your 3rd and 4th gear would be more like Bears or Tsivas logs in 1st or 2nd where they only make 14-15 psig. I don’t think you ever hit 16 psig on your last log.
In all honesty, to me, your car should be faster at a reasonable elevation. Come down here…
Awesome Trap and ET!
I wonder how much better they would be with slightly lower IAT. The CPS system should help out.
Here are all of the runs sorted by vehicle speed and laid out on the graph.
http://www.goapr.com/news/wp-content/uploads/2012/11/log.png
Ignition begins dropping when IAT and boost rise.
IAT will naturally rise with boost and the longer you run wide open.
Boost also rises with vehicle speed in the taller gears.
So, the longer you run, the lower ignition will be.
The CPS system should help out here.
Lol! He’s got the CPS. But I noticed Bear compulsively opening and closing the pressure reservoir cap the same way I compulsively fidget for a cigarette when stuck on a plane. There can’t still be air in there, can there be?
Bear’s IATs rose more than Prime’s (mid-October). Bear went from 40-70ish, while prime went from 35-55 over a run. Bears IATs seem to recover just as quickly after the run, though, I’ll compare the two. Definitely something working better in Prime’s car, and we were in slightly colder weather too.
Prime’s ignition timing doesn’t drop off as badly either, 1st and 2nd gear looks similar to Bear’s but 3rd and 4th only drops off to 24-25 degrees. Prime is running cooler, though, and what seems to be 1.5 psig less boost.
Lemme know if you want to plot Prime’s, I can send it but I’ll wait for his ok too. I think he wanted you to have a looksie anyway.
J
Thanks for the response Arin!
I guess what I want to know is whether you see anything within the logs that would be of concern? I’ve noticed that with V2 of APR’s tune the delta between requested and actual boost is noticeably more was that intentional? Also, are my boost levels at 16+ psi normal? As PT’s seem to remain in the 15’s range from what I’ve read.
Thanks!
Prime’s in a slightly lower atmosphere, so he can’t get the amount of intake pressure we can. 974 hPa, so he creeps over 15 psig.
Tsivas has a log where he hits 17.5 psig because the atmospheric pressure’s at 1043 hPa (!!)
I’ve noticed when I logged my S2V2, requested pressure tracks 50-100 hPa over actual, if you haven’t gotten an underboost/boost leak error then you’re fine. It will always use the actual pressure as feedback for control.
I’ll plot some select data in a bit and you can see what I’m talking about. Discuss here 
yeah my car is making crazy boost in these temps. seeing 16.6-16.9 psi daily even on pump, 17-17.5 psi on 100. But timing has dropped to even lower levels than V1 while IATs have gone up.
Tradeoff? I dunno. Increased IATs and decreased timing for much more boost up top that doesn’t seem to make a difference at least when I was running Vbox times recently. Would CPS help? Probably… I am adding soon.
But for me… Strictly doing pulls and comparing vbox acceleration runs against two other similarly modded S4s with diff software…Seems like the GIAC and REVO stage 1 cars with much more timing than me were dead even or maybe a little stronger in the top end and the Stage 2 V2 was better down low especially under 4500 rpms. But doing regular pulls from 4000 rpms up… cars were all pretty even.
I had inquired about this with Arin a while back.
I would love to try out and log under similar conditions different 93/100 files with more timing/a little less boost and compare to current V2. Simple 3rd and 4th gear pulls on vag com/vbox together. Especially in these cold temps.
But I think increased ign timing plays more of a crucial role powerwise in the upper rpm range than boost does. I have two same day 15 mins apart dynos with same testing conditions/parameters between an APR St2v2 (my car) and a GIAC stage 1 car (Auditude’s) that show what vbox shows- that up top all three cars are very similar difference being APR runs higher boost and less timing and other two (GIAC and REVO) run lower boost and more timing. On dyno…under 4500 rpms… APR Stage 2 had distinct advantage (15-20 whp/tq at points).
Just looking at deltas and leaving peak numbers nonsense out of equation …(dyno done end of summer/hot room/only difference being intakes and software )-- u can see where the pulley (red) actually helps. I would have overlayed the Revo run on there also but guy had real tough time running DSG on dyno and did about 10 runs of adaptation and tons of cool down to our virtually none. Didn’t feel like it was relevant as car adapted with each successive run and numbers kept increasing, but in general expressed same result.
Nice… I’d like to see the comparison and get some feedback as to whether there is something wrong with my setup (CPS unit or whatever).
Bear where did you dyno? Was it engineered automotive?
This might be your car if so.
https://www.youtube.com/watch?v=qfCqU6XmZeA&feature=youtube_gdata_player
Red is prime. Blue is bear.
Look how bear has higher manifold pressure, and prime has lower intake temps. In the end, MAF is the same.
But prime has more ignition timing advance because of the lower temps, maybe also because of the tune.
Bear, I think you should re-bleed your CPS. Look at these, draw your own conclusions.
Thanks Prime and Bear for sharing your logs…
http://farm8.staticflickr.com/7111/8160170702_33ca73fa14_b.jpg
http://farm9.staticflickr.com/8057/8160135013_6354367112_b.jpg
(pictures fixed)
Not sure if you confused dyno I posted. Wasn’t Bears. Was a day I had three tunes dyno together. Just to show what I had suspected- at least in my case… that the tunes were very close post 4000 rpms. Did this dyno session after seeing first hand results of pulls on our private track where we don’t usually start at idle or low rpms and the vbox data and acceleration data I extrapolated from higher rpm speeds on.
I’d probably sacrifice some boost up top and the resulting increased IATs for a little more timing. Both the Revo and GIAC car are running just fine per vag com sessions I have done and especially now in colder temps.
We might be seeing same thing with Bear, with speculation that CPS is not at fault, where there might be too much boost up top (16++psi and up I have seen) and subsequent high IATs and decreased ign timing as a result.
Who knows…I’m just ranting. CPS coming soon and Strat intake testing vs my current AWE S Flow/airbox mod. My last awe vag log MAF g/s were ridiculously high… hitting over 1451 kg/h or 403 g/s!