second run downhill 0.46% (9 feet over 2007 feet)
60-90 3.99
60-100 5.89
60-120 10.29
60-130 13.51
No idea how that stacks up vs. other RS4s but itll be interesting to see if Tsivas has any data.
Car had 1/2 tank of gas and I weigh 240. I’m sure I could get another 40 lbs out of the car if I wanted to…and I have 45,000 miles of carbon buildup (so I guess that means I’m down about 200 hp)
Tony however I had a huge lead on but I lost all five tenths from 110-120 (on my flat run). Doest make a ton of sense. Not sure if the shift hurt me. RS4 fourth gear maxes out at 129.something.
You guys know his car… Milltek exhaust, eurocode headers, APR intake, APR stage 2, APR CPS, Clutchmasters FX400, ST-60 BBK, 19 inch Titaniums, VP Streetblaze 100 octane 5 gallons
DA -3350, 13F
mph time time between two speed intervals
45 0 (0.0)
50 0.47 (0.47)
60 1.38 (0.91)
70 2.34 (0.96)
80 3.46 (1.12)
90 4.67 (1.21)
100 6.27 b[/b] Shift happens here
110 7.77 (1.50)
120 9.48 (1.71) 129.82 11.80 b[/b] >:(
3rd gear 45-90 4.67s
4th gear 96-129.82 6.07s
45-129.82 11.80
60-90 3.29 (he hit 3.10s on another run but most of other data/shift was slower)
60-100 4.89 60-120 8.10 60-129.82 10.42
Where the problem is… 100-120 3.21s
120-130 2.32s
Compare to my last run. I am only showing data until 129.82 to compare to his times as Richi could not hit 130 without shifting into 5th which makes the comparison useless at that point.
Difference in setups is pretty much just the Eurocode headers. I ran better gas (110 octane Shell URT), he had much better DA. Mine was -1850, 33F
mph time time between two speed intervals
45 0s (0.0)
50 0.51s (0.51)
60 1.49s (0.98)
70 2.52s (1.03)
80 3.59s (1.07)
90 4.71s (1.12) 100 6.57s (1.86) Shift happens here
110 8.22s (1.65)
120 10.1s (1.88) 129.82 12.09s (1.99)
Compared to where his problem lies… 100-120 3.53
120-130 1.99
Few pts
–There is definitely something going on with his car at 120-129.82 mph interval. He loses 0.33s in this time vs my time.
– We have seen the same issue with Pete’s car after he put in the CPS/testpipes/FX400clutch. When I was logging Richi’s car… we did notice a hesitation at 120mph and up. Felt like a slight misfire. Vag com did not show any significant timing pull/events. Boost, MAF etc were ok. Didn’t log IAT. Jspazz will kill me lol.
–Same thing was felt when I logged Pete’s car. Definitely something going on with both cars in 4th gear 120mph+ mark. Both CPS reservoirs were almost empty.
–Common denominators between Pete’s and Richi’s car are the CPS system/Headers or test pipes, FX400 clutch. Maybe something going on with the extreme cold temps we are testing/ running the cars.
–The hesitation was not felt in 3rd gear. Seems to be 4th gear related.
–Richi’s car is pretty quick. His 60-120 time is about 0.5 secs faster than mine. He loses almost all that lead after 120 though. Loses about 0.33 seconds. I also lose about 0.25 secs compared to him on the 3rd to 4th shift in this speed interval.
– If Richi had a clean 130 run… from the looks of what I did (continuing the time trend from 129.82 to 130mph), he would have done approx 10.46 60-130. This is with the crappy 120-130 segment where he lost 0.3 secs. His car theoretically ;D is a solid 10.1-2 car in the 60-130 test. Put on those LW wheels and we are looking at high 9s. 0% decline.
–I do believe the headers have helped his car. I think 4th gear especially, at least in the 100-120 section. The delta between cars and the different speed segments in fourth is more apparent than in third gear. Our third gears are almost identical. The total gains compared to a non header car(my calculation ~about 0.4-0.5 secs) are similar to what Pete gained with the test pipes (test pipes were a little less, 0.2-0.3 secs), only to be lost in the 120-130 segment. Who knows. Maybe it is the CPS? Maybe it’s the testpipes/headers?
– This calculation of 0.4-0.5 seconds improvement vs a non header car is mainly in fourth gear. Each segment 100-110, 110-120…he is gaining about 0.15 seconds or a little more on me. Continue that trend 120-130 and it is about 0.45 seconds. Maybe a little more. That 120-130 mph hiccup really cost him.
–We just have to figure out why the two cars are behaving like this above 120.
Could his clutch be slipping?
High speeds do weird things to transmissions. There’s a supercharged S5 in Europe who blew his transmission on the autobahn from high speed runs.
Also it is comical how fast you guys are at the low speeds vs my car which is probably a good proxy for a stock B8 s4.
The manual s4 max speeds in respective gears are almost identical to the rs4. So have a look at my or pauls cars vs the manual b8 and compare ‘time lost’.
Also don’t forget that you guys having seven gears are tighter in the powerband than the gap pier manual cars.
Finally if both the manual cars are slow up around 110-130, why dismiss it and say’ his car is a solid 10,1 car’ when it just went 10.5? It’s maybe just a limitation of the gearing and this very weird 60-130 test… A test chosen by Porsche gt2 guys who had no traction and entirely different gearing.
The dsg guys ate better at accelerating at the top end thanks to gearing. That could be the conclusion.
You said it yourself… You and Richi have basically the same mods and he was slightly faster. Why aren’t you saying there’s something wrong with your car from 60-100 since he is putting a big gap on you? 7 because nothing is wrong…His car is just faster there.
You can’t create a Frankenstein time from two cars… I. E. Richi from 60-110 and you from 110-130 or something. No more than you can say the audi rs7 looks great because the front is awesome and the back of the S5sportback sedan is awesome.
I doubt it. It’s happening to Pete’s car also. It’s either the no cat/headers/test pipes (unlikely) or some issue with the CPS and these really cold temps. IAT’s/cooling to supercharger might be causing this.
Who the hell knows. I doubt people are doing extreme weather testing like we are though. Pete’s GIAC tune is having bigtime bypass valve issues with these cold temps.
I was referring to Pete and Richi both having the 120-130 mph problem. Not me. Both Pete and Rich have the CPS. Pete didn’t have the 120-130 issue pre CPS. His car pulled pretty good for the most part. I don’t have the 120-130 mph issue.
Richi’s car, compared to mine… in straight up fourth gear is gaining 0.15 secs in every speed interval 100-110, 110-120… why wouldn’t he gain that in the 120-130 segment vs my car? Instead he lost 0.33 seconds. Doesn’t make sense to just stop gaining completely and then start losing time. That’s my red flag.
If you keep his “gaining a little over 0.15 seconds trend” going into the 120-130 segment… that’s 0.45-0.5 seconds total in 100-130 segment that he should improve over my car. 10.64 - 0.5 secs… 10.15 secs. or take his 10.4X time and subtract the 0.33 secs he lost in 120-130 mph segment. Just a hypothetical. I haven’t included anything in our database as he didn’t hit 130.
He is gaining on my car in the 60-100 segment in one part…90-100 or more specifically where the shift happens. 60-90 is pretty close. Mine is actually better. In fact our straight up third gear pulls are almost identical (45-90 mph). The 90-100 segments include the shift and his section is about 0.25 secs faster. Graph shows the same shifting thing I noted.
Third gear we were pretty close. He shifted better, gained some time there and was pulling in fourth gear up until 120mph where he lost 0.33 seconds. Something is up and it’s not gearing.
I am not creating a Frankenstein car… Just trying to diagnose why there is problem in only 120-130 mph part with both CPS cars. Breaking down the runs in speed segments helps a ton.
It’s not a gearing thing as my car doesn’t exhibit this issue and I have the manual tranny also, no CPS though and stock cats. The two cars where you see a lead early on lost after 120 mph, at least from the cars I have tested- both have the CPS and no cats(Pete’s and Richi’s). Pete had a lead versus his pre CPS times also… guess where he lost that lead? Mostly after 120mph.
You could feel the issue when I was logging with Richi. Opening up his CPS reservoir… coolant seemed congealed per Rich and pump didn’t seem to be mixing properly. I know Bear had an issue with his CPS also.
^^^My problem was not so much with the CPS unit as it was with the coolant mixture. I had straight coolant running through the CPS unit driving IAT’s up vs a 50/50 or 40/50 mix.
LOL! That would be a little expensive from a logistical standpoint ??? Besides I like my choices over here especially since I can get 100 at several “pumps” and have a source that will be stocking Shell URT advanced this spring…
Have either of the RS4’s been back since they ran those times? Just curious since I hadn’t seen anything… Wonder if anyone in the states has bought that setup… I always ran centriugal blowers on my Mustangs and still believe they are better for drag racing…
Tsivas, As always good stuff, glad Richi got out and posted some solid results… Would really be cool if you guys can figure out whatever the issue is, I just can’t see it being the CPS… Wonder if Arin has ever experienced it and what his or the APR teams thoughts are?
[quote=“81bear,post:333,topic:3387”]
I haven’t done enough of the Pbox testing so to say… At the track the IAT’s were much better in the summer but during the cooler weather they were fairly close… The CPS however, helps from a consistency standpoint when hot lapping in the cold at the strip, which is what I usually do since it isn’t crowded in Nov.
He is faster in 4th gear 100-110 by 0.15 secs, 110-120 by 0.17s, then all of a sudden at 120-129.82 interval, his car falls flat and LOSES 0.33 seconds. Doesn’t make sense.
Continue that trend… 0.15 secs for 120-130 segment… That’s 0.45 secs overall improvement for those three segments in 4th gear compared to mine. And hence my hypothetical. I hope he gets it straightened out and proves me right. ;D
haha, it just ran 98 octane UK fuel, which was 93 octane shell vpower I believe
The big power RS4s are damn annoying…they went once, proved the concept and that was it. They took the JHM approach…go kick some ass, but then leave it in the customer’s hands. Unfortunately most RS4 customers either don’t understand, fear, or loathe the dragstrip. So it’s like pulling teeth. Even the APR car driven by Keith…went once. The one driven by Rocketman, ran 11s, then didn’t bother again in better DA. Both of those APR 11 second runs were in warm temps with no real awesome condition runs even being attmepted. Rocketman is getting rid of the APR kit in the pursuit of tens (he bought a JHM kit)
I totally see what you’re saying now. I kept thinking you were DSG and he was manual, so I was thinking ’ don’t worry so much about the differences.’ The fact the faster car is suddenly much slower…especially where we’d think it would rape you (higher end, higher speeds) means something isn’t right.
That CPS…man, lots of finicky behaviour. Didn’t it already show up as problematic on richi’s car at a dyno day? Seems like it’s one of those products that you really really need to get the install right.
The headers wouldn’t likely cause this. The CPS…I don’t see how it would only at monster high speeds. To me the clutch would make the most sense. But if Pete’s car got CPS then started acting up, that kinda points to CPS. If he got his clutch at the same time, that makes it a coin toss again.