Justincredible's low12sec nos pass MORE INFO

B6/7 S4/RS4
#1

I just wanted to say I was there with a few other hardcore Audi members. It was a real great experment to see how this was all done.

I thought I would post this here as there is more info to be shard then just what he first put up. As he actually went faster then the times he posted. Its great info that I would love to see shared here

Late fall after several months of tinkering with my NEW JHM NOS Kit I decided to see If I could get back on the leader board. While I love the JHM supercharger the JHM NOS kit offers IMHO a chance to get the benefits of the supercharger when you want it and the ability to go without when you want that as well. Not that you would ever want less power LOL. but for those power hungry guys like myself on a budjet its a good way to go.

I was hoping to make this post with better results then the below. As I wanted to spend more time on the car in full trim then the time I wasted with the switching of the exhausts. I feel if I spent more time on the car with the full 2.5" exhaust I could have gotten some better times. I wanted to go back to the track but the past few weeks I got rained out and now the track is closed for the year for me because I can’t get back now as I have no more time.

After all the years of debate and keyboard skeptics going on and on about exhaust systems and if they really made a difference for your 4.2, I decided to put years of research and tons of hard work to the test. While at the same time looking to see how well my Automatic S4 could fare at the local track with the help of the JHM nitrous kit. I was able to make several passes at the track as it was late Oct and only a few hard core racers were there. SO I packed up the truck and went to the track with a few good friends, a lot of tools, several full NOS bottles and 3 different catback exhaust setups.

The first to get tested was the 2.25 Milltek catback. I ran the car two times on the 2.25 no nitrous and two times on the bottle.

The 2.25 exhaust really IMHO killed the car. My best 1/4 mile pass on MILLTEK 2.25 + ALL MOTOR = 13.2 @ 106. It also yielded the worst 60ft times of the day with 1.9x. After you drive with a proper exhaust going to a 2.25 really shows how much it chokes the car off. I’ve read like 1000 posts where members ask “will I ever feel the difference between a 2.25 and a 2.5”. Simply, that answer is YES. Adding the NOS helped the Milltek but still left me with less then acceptable results. My best run MILLTEK 2.25 + NOS = 12.8 @ 110 . While I was really happy to see 12’s, it wasn’t the 12 I was looking for.

Next, came the tried and true JHM 2.5" X pipe catback exhaust. Even after driving back up to the pits. You can feel that the car likes the 2.5 better then the 2.25.

First pass on the full JHM header and 2.5" catback with X pipe was a win…JHM 2.5" X + ALL MOTOR = 12.88 @ 110 I had just done the same 1/4 mile pass with the car ALL MOTOR and just a proper cat back as I did on a 2.25" exhaust and NOS. Seriously now, IMHO for me this 2.25 debate is not only dead, but anyone that has said that you won’t be able to see a difference or feel a difference between a 2.25" exhaust and a proper 2.5" exhaust with a X pipe will in my opinion lose just about all credibility after this one pass. With the new JHM Launch ASSIST for the Automatic cars I Was able to hit nothing but 1.8 60’ launches EVERY TIME. I ran the car back to back to back and got the same consistent times. 1.88 60’ 12.88-12.91 and 109.7-110.8mph. First good pass on the JHM NOS kit. 1.88 60’ and 12.3@113.8. I let the car take a breather as I made sure to look over my times and look over my logs of the car. The JHM NOS kit was spot on. The RPM activation was right on and the safety cut off was also working great. I made the next pass with the same bottle pressure even though I wanted to turn up the pressure on the bottle it was getting late and I didn’t have many more runs left. Next pass 1.88 60’ . JHM 2.5" X + NOS = 12.27 @ 113.8. I could have done that all day long. Between the JHM Tune and the JHM NOS kit the car was deadly accurate and consistent.

BEST TIMES

  1. JHM 2.5 X + JHM NOS = 12.2 @ 113.8
  2. JHM 2.5 X + ALL MOTOR = 12.8 @ 110
  3. Milltek 2.25 + JHM NOS = 12.8 @ 110
  4. Milltek 2.25 + ALL MOTOR = 13.2 @ 106

2.5 vs. 2.25 = 6 tenths and 3 MPH with NOS
2.5 vs. 2.25 = 4 tenths and 4 MPH ALL MOTOR

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What I did notice on the all motor passes was that I was spinning right at what seemed to be right before the 60’. Anyone that has a header car will tell you that its easy to spin your 4 tires if you launch hard enough even when you have a automatic. The tq from the headers made it real hard to get a real good 60’ as if I really stood on the LA system I would come out real hard but I would spin the tires real bad and ruin the run.

I was happy with the 2.5" X all motor 12.88@110. That is impressive enough for me. So I decided to turn on the go juice. This is where the real excitement happened. I wanted to go for the gold out of the box. So I sprayed the car in 1st gear… and well that was a bad Idea. I felt like 91gl as I just blew the tires up in smoke and spun every time almost going into the wall. The Audi felt so strong footed you just sprayed and before you knew it what was a light wheel spin turned into a smoke fest and you were headed not straight anymore but it was like you were skating on ice when the JHM NOS kit hit. So the first few NOS passes were not full passes. I then decided that I was going to not spray the car in 1st gear. This should help me get out of the 60’ range and then I can let the JHM NOS carry me the rest of the way. I also lowered the bottle pressure on the bottle. I found that the higher the bottle pressure the harder the NOS will kick. So I took the pressure down by almost 200lbs. I knew this was going to cost me big performance but I wanted to just play it safe.

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Timeslips for proof. We tried to take video and we have some. The issue with this track is there is no score board. So if there are any questions on the times. There were several other forum members that were there that day and you can also call the track to verify the times.

#2

some video I got on my blakburry

http://audirevolution.net/videos/95/b6-s4-open-headers

more to the story of how fast justin went

http://audirevolution.net/addons/albums/images/918064368.jpg

#3

Good stuff, the short exhaust vid is sick.

#4

Very nice! Shows the bigger exhaust really works that’s for sure… Gotta like how he details things… Little better 60ft time and/or 100 shot and he is running 11’s… great job!

#5

It is a great result for Justin hope he hits 11s next year, I always love his post so informative.

#6

here is the story behind that slip

Next up - no catback at all, just open JHM headers
All the back pressure guys go on and on that going too big (exhaust diameter) can be bad for the car. As people notice when going from stock to 2.5" it FEELS like the Tq has changed or most people would think you lost TQ. The loss of backpressure is often cited as the reason when you use the butt dyno to determine if the bigger exhaust helped…and that changes when you race someone or go to the strip and see that they’re faster. Same feeling of torque ‘loss’ happened when I went from 2.5" catback to open headers. Fact of the mater is the TQ curve has just shifted to much further up the rev band and it’s not ‘hitting’ where you are used to it…you haven’t lost anything though as you’ll see.

I torched the tires on the NOS passes on the open-headers. When the power came on it came so quick I almost lost control of the car. I upped the bottle pressure and that just made the car more violent. Hell even the all motor open headers passes I torched the tires. Its violent. And its fun. On a funny side note. I have a cloned JHM stock ECU. Just for fun we put in the OEM ECU and we were going to make a pass on the headers as it seems to be the best for great gains. With the stock ECU the car barely ran. so JHM TUNING FOR THE WIN.

If anyone is looking for proof that we can do well with a free flowing exhaust, just click the image link below and and see. I have the rest of the slips and will post them but I thought if you have to click on the picture link it adds more fun

INSERT TIMESLIP HERE

Shawn hornet a local 3.0 guy too this video just before we ran the car on open headers… he didn’t get far enough under the car to see anything exciting you can just see the intermediate pipes. BUt you can hear how much tighter headers are then a very open exhaust. Thanks for your help shawn.

That was the only real good open header run. I can’t take credit for it and I don’t feel we can use it for a official 1/4 mile time due to the fact I wasn’t driving and its not in real street trim.

Countvon made a rare apperence and was able to help me out with getting switched over to the 2.5 exhaust… I switched to the header open runs between the 2.2 and 2.5 as I had the catback off anyway… So Countvon was driving the car. I wasn’t able to get the header car out of the box on spray. remember we did the header car before the 2.5 cat back. The car ran great on NOS and 2.25 but it wasn’t violent like it was with headers or the 2.5" W X.

Every time I Tryed to make a pass on the headers and spray the car would just atart skating all over the track. Even the opne header all motor passes was hard to get tracking on down low. Due to me just skating all over the track and not being able to get a strong run. I asked if count would like to try.

He laughed and said sure. “watch how you manage kayos, just keep the throttle WOT and keep it between the walls. when you spin just keep in it dont work the throttle, give me the keys Ill show you how to leave 4 tire marks past the 330”

Well thats just about what he did. You can see the ET wasn’t that much better due to the car spinnig probably up till the 330. I ve never seen any S4 blaze the tires like that for that long. Uaudi said he lifted on the shifts to help flash the converter to make for a more violent shift (due to the NOS) so the MPH went threw the roof but we realized that maybe we should just spray the car in 2nd and not activate it in 1st anymore. With time running down I just decided to put on the 2.5 and get the most out of that we could.

So I Think we could use a bigger exhaust and get more power. I think the moral of the stroy is. If the 4.2 guys have a 2.2 exhaust do yourself a favor and sell it to a 3.0 guy :stuck_out_tongue: he needs it more then you

#7

hahaha that is classic…the car must have sounded like it came from hell…who needs a manual…

#8

Those damn tiptronic’s are so slow, I guess I should have gotten a manual. ::slight_smile: Great numbers! You keep giving me something to aim for. ;D

#9

that made me laugh hard too Lout JNR. CV has a silver tongue…I’ve heard so many lines from him that are signature worthy I cant count.

justin, can you post the

12.88 @ 110 all motor pass with x-pipe timeslip up? I want to add it to the 1/4 mile chart I’ve got going over here. I’m also going to add the best nitrous run as a seperate pass (12.2 @ 113) but I already see that slip in this thread.

#10

So, I checked S4biturbo.com to find the fastest tiptronic B5 S4 Stage III car

Here it is

BLACK01S4
Fastest Tiptronic NE GIAC X L-box, Tantrum Split no-cat downpipes, AWE Twin2 exhaust, Modified Level 10 converter (~3200rpm stall), B&M tranny cooler, TCD, GIAC TCU, AWE ICs, K04/RS6, RS4 oil cooler, fuel pump, 440c Greentops @ 4bar, Apexi AVC-r 26psi spike, 23psi taper, 19" LE37s

60 foot - 1.77
1/8th - 7.94
1/4 ET - 12.25

vs. Justin’s B6

60 foot - 1.88 (0.11 behind)
1/8th - 8.02 (0.08 behind)
1/4 ET - 12.276 (0.02 behind)

Not sure if he was on pump or race gas. Anyway, pretty interesting, isn’t it?

Justin’s car is LESS THAN 2 HUNDREDTHS from that time…and justin only took 4 swats at it. Imagine if he went for a full test + tune and got 10-12 passes to perfect his shit? And imagine he wasn’t heat soaked from running all day with various other exhaust setups? Don’t forget his fastest times with the 2.5" x-pipe catback were at the end of the day after a bunch of other runs. If he drove there, parked it at 10am, then let the car cool down till 11:30 when the track starts running, I bet he pounds the shit out of that tip B5 time.

That’s pretty awesome.

The no catback/full chaos time CountVohn ran in justin’s car of 12.24 is actually faster than the fastest ever Tip B5 already, so that’s something interesting.

#11

plus Justin has a stock transmission, a stall converter helps a ton off the line (only so much you can do with tuning)… if someone ever builds a stall converter for the B6s there should be no issue besting that 60’.

What I’d be interested in seeing is Justin’s B6 on 93/motor vs 2000S4’s RS4 on 93 from a 2nd or 3rd gear roll. The traps are similar so itd be interesting to see how the gearing plays out.

#12

that’d be cool to see…I’d put a fortune on the RS4 though. In the quarter it was 6 tenths faster and had a 1-2 mph advantage. More interesting to me would be a 2nd gear low speed rip with justin on nitrous. I wonder if the RS4 could hold the nitrous S4 off. The S4 should win it if they start in 3rd or something…

#13

When you look at the MPH difference that justin had over the B5 car its very funny. You always think that the turbo cars run strong uptop. Well justins car seemed to catch the B5 car up top. Seems that justin and his nos fed car are a very strong MPH car. That is just plain impressive. While I do have a spot in my heart for the RS4 the MPH of the RS4 cars isn’t the strongest Vs say the MPH of the B6 S4’s. Im thinking that the gearing of the Rs4 has helped it play a roll in its strpng performance.

#14

The mph advantage is what matters, from a higher gear roll the RS4’s gearing advantage isn’t going to help as much (it drops the ET a lot but doesn’t increase mph much for the most part). I think it’d be a decent run. On spray the RS4 would get wrecked in anything but a dig/1st roll. Remember the video of Kenny’s car vs Prince’s car and how hard the nitrous cars move out from a roll.

#15

not sure what you’re looking at but George’s car is accelerating way harder and is faster at every point of the track than justin’s car all motor.

and there’s no way George’s car would ‘get wrecked’ by justin’s car on nitrous. That’s dreaming. Justin trapped 113 and George trapped 112. Their times were identical. From the 1/8th to the 1/4 justin’s car took 4.25 seconds while George took 4.41 seconds. That’s basically a rip from top of 3rd to just before redline in 4th gear. That’s 0.16 seconds difference…a.k.a. about 1.5 car lengths by the 1/4. Hardly a wrecking of any sort. Justin’s car picked up 23.5 MPH from 1/8th to the quarter, whle George’s picked up 23.0. Earlier in the run justin’s car is not gaining ground, mph or time on George’s car. So basically the ‘advantage’ of the nitrous car is up top, and again, it’s about 1.5 car lengths up to about the top of 4th.

#16

Justin, great times!! The MPH on the open header run is nice. A great experiment and a big win for the community!!