Mass Reduction & Acceleration Improvement:

[DavidT]

Is your MPH really 190mph?, If so you should have a quicker ET than 12.4. My hubby has done drag racing for a number of years, and his best time was an 11.3 @128mph. This was in a front wheel drive car though. there's a vid of him here. http://www.dragslag.com/videos/index.htm

With an MPH of 190 you theoretically should be doing 8's. What are your 60 ft times like?

Not with a 1600kg car He' saying the max speed of the car is 190. He's doing 115 ish at the end of the 1/4.

[Paula]

I wasn't sure whether the MPH quoted was the figure corresponding to his ET.

[Ads4]

You never know....MAJOR turbo lag off the line (4.5 secs) and then an 8 sec to 190 !!

[saf]

Paula - thats the top speed of the car. 190 mph. Not 12.4 @ 190 mph. Then he shoul dbe into 7's more like.

http://www.bangor.ac.uk/~mas009/neurogy ... ction3.htm

Leon - have a go at the above. Helps improve reaction times.

Im only having a laugh mate. I fell you need to improve your reaction time in other ways though . There are proper exercises for this that you can do. Theres nothing better than practicing the real thing, but that all depends on how many clutches you want to go throguh. There are other things you can do to improve reaction time. Its a mental thing, and you need to train your brain to react quickly. that will shorten your reaction down enough to give you possibly half a second, maybe more in some instances.

There was one guy with an american muscle car that got a reaction time of 0.06 seconds. That would almost certainly bring you into early 12's if you bring your reactin time down.

Recaros weight so much as we all know. I think your wheels are fine. Theres easier things that you can do. The new Superleggera III''s weigh pretty mush the same as what you have on already give or take a pound or two. Its not worth the expense from a cost effective point of view.

Before doing any weight saving, which can cost an absolute fortune on replacing parts, I would change your flywheel and clutch as ive said to you before.
As you do a lot of local driving get something not to uncomfortable. Definitely need to get rid of that RS4 combo. Single mass is necessary to get you into those 11's.

In fact if you get a single mass flywheel and get the front seats changed to the pole position ones, im sure you can crack low to mid 11's. If you work on your reaction time and get that spot on, I think it may be even possibly to crack very low 11's.

Another option you have which will be significantly cheaper than changing seats as I know there quite expensive, is to go for a shot of NOS. NOS systems can be fitted safetly and with ease. Will add a little weight, but how much does a can of NOS weigh? 50 brake of NOS would be sufficient. But I think you have standard rods so that will be a bit risky. If you uprated your rods then go for it. Would be fun!!!!


You can get rid of little things when you go next. Such as the boot liner, the ashtrays your armrest cover (if you have one), front ashtray, the glove compartment lid, and pull out the back seats temporarily. Just to see what difference it makes. All depends on how badly you want to get that time!!!

[saf]

You never know....MAJOR turbo lag off the line (4.5 secs) and then an 8 sec to 190 !!

Thats 190 mph in 12.5 seconds

Thats what some of the guys on the RS4 forum are working on I believe.

but they will be probably hitting 160 realistically. 0-60 in 3.5 seconds and 60 - 125 in 6.0 seconds. Then 125 -160 in another 2.5 seconds.

3.5+6.5+2.5 = 12.0 seconds.

160 mph in 12 seconds. Not bad at all. I d like to know what that will do 1/4 of a mile in.

Thats 650 brake for you though!

Major turbo lag. but major major kick.

Leon - another thing I forgot to mention, you need to work on your 0-60 tims as you should be pushing under 4 seconds without a doubt. All comes to reaction times and clutch as I mentioned earlier. A 400 brake S4 should be pushing around 4 seconds, so you should be slightly under.

If you will change your clutch then get lots of practice in before you change it, and when its fried, have a nice single mass one ready to go in.
Just becareful as to what clutch you replace with. Keep the revs at around 3000K ish on boost to minimise the lag. Do a few practice runs and keep an eye on boost guage to see where your car is making the most boost between 3K and 3.5K rpm and launch about 100 RPM before that.

[DavidT]

In fact if you get a single mass flywheel and get the front seats changed to the pole position ones, im sure you can crack low to mid 11's. If you work on your reaction time and get that spot on, I think it may be even possibly to crack very low 11's.

I don't agree with that saf.

Assuming the track and driver are the same, how can saving 50kg in weight, a stronger clutch and a LWFW (say 30ft lbs torque increase) = a 1 - 1.5 second time reduction ?

The physics just does not stack up there for me.

[DavidT]

Leon - another thing I forgot to mention, you need to work on your 0-60 tims as you should be pushing under 4 seconds without a doubt. All comes to reaction times and clutch as I mentioned earlier. A 400 brake S4 should be pushing around 4 seconds, so you should be slightly under..

eh ? 4.0 for a 400bhp S4 is very optimistic.

If you will change your clutch then get lots of practice in before you change it, and when its fried, have a nice single mass one ready to go in.
Just becareful as to what clutch you replace with. Keep the revs at around 3000K ish on boost to minimise the lag. Do a few practice runs and keep an eye on boost guage to see where your car is making the most boost between 3K and 3.5K rpm and launch about 100 RPM before that.

That has never worked for me, too low to spin the wheels up.

[saf]

I know what youre saying David.

I didnt say it would shave 1.5 seconds. It would shave 0.8 seconds onwhat he's best time is so far. If he worked onhis reaction time also then it could amount to 1.5 seconds or so shaved off. At present reaction time is over .5 seconds from what I saw yeaterday. At the least in the last run it was .3 seconds if I remember correctly.

So fars Leons managed a 12.4 right.

I say he would get mid 11's. Possibly 11.5 to 11.6 seconds. Thats about .8 to .9 seconds.

With a single mass flywheel you will in theory and practice in some ways be lightening the whole car by between 7% to 10% when in first gear. This will give a far better 0-60 than hes current 4.4 seconds.

I do believe its possible to still get a quicker time than 0-60 in 4.4 seconds using the RS4 clutch / flywheel combo. But you need to know how the clutch is working and need to be able to feel the clutch in a way that you know how it will react. That takes a lot of practice. With a single mass flywheel, its easier to feel what is going on and subconciously you get a btter feel for it and know at what point to hold the clutch and how to drop it. If that makes any sence to you.


No with that 1st gear shaving a good 300lbs or so given that weight with driver is approximately 3500lbs off the car in first gear, that will make a huge difference.
As we go up into second gear the theoreticalweight loss from the flywheel will be just over half , then halfed again on the third gear. There will be less of a loss as we go up in gear.

With that in mind its possible to obtain a mush better 0-60 and possible save a second in time to bring the 0-60 to what it should be on a 500 HP car running K04's etc etc. At current Leon has posted that hes run a 0-60 time of 4.44.

That can easily be 3.7 to 3.8 seconds. Thus shaving off .7 sedonds without the change in recaros. Then if he improves reaction time he can save another half second. Therefore bringing him down to a very good time. 11.2 seconds. I think if he does the clutch and improves the reaction time he can aim for 11.0 and definitely get an 11.2 seconds.

At 500 brake thats more than feasible. And I think he will definitely do it.

[oliew]

i got 11seconds on the test!

[saf]

I got 14.

[GrahamS4]

The times don't include the reaction times so whatever they are they are irrelveant for this comparison.

[saf]

I always thought they did!

I was wrong then,

Well I still think hell crack mid 11's with flywheels and clutch changed.

That means the reaction time starts from when the last amber light goes off?

It would still add an advantage to practice reaction times, as its good practice for when changing gear.

[saf]

David and Leon, what tyres were you running? and how much air in front and rears? Also I know Leon is running 19's I presume that youre running 17's DavidT.

I think I saw your car. silver one with 17 inch avus wheels with I think red calipers, hence you wating to go for the B6 Avus?

[derdle]

You are all missing the obvious one. It's so well known, I'm surprised nobody has mentioned it yet.

Paul

[harperboy]

What, lying the rear seats flat?! Any back to the comment on colours david, every knows that yellow is the fastest colour!