Mass Reduction & Acceleration Improvement:

Discuss common aspects of Audi RS and S tuning and modifications
User avatar
saf
5th Gear
Posts: 1334
Joined: Thu Mar 30, 2006 12:39 pm

Post by saf » Mon May 21, 2007 7:26 pm

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

Paul
Oh I know

the weight of the countless flies stuck to Leons bright yellow car. There was so many of them yesterday.

Youre right. Silver would be a faster colour!!!!

rolskii
5th Gear
Posts: 1143
Joined: Sat Oct 22, 2005 1:52 pm
Location: riverside
Contact:

Post by rolskii » Mon May 21, 2007 9:38 pm

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

Paul
Oh I know

the weight of the countless flies stuck to Leons bright yellow car. There was so many of them yesterday.

Youre right. Silver would be a faster colour!!!!
rubbish........ :D
I would say yr all fat bastards that need to go on a diet ..... :twisted: hahaha
happy dayz .... party ....

User avatar
saf
5th Gear
Posts: 1334
Joined: Thu Mar 30, 2006 12:39 pm

Post by saf » Mon May 21, 2007 10:17 pm

:biggrin3:

User avatar
ZeroK66
Top Gear
Posts: 2249
Joined: Sat Jan 15, 2005 5:13 pm
Location: Devon, UK

Post by ZeroK66 » Mon May 21, 2007 10:50 pm

Derdle? Spread the joy... or is it what rolskii said?

Saf - indeed 1/4 times at pod do not include the reaction time. I purposely took my time on launches to get my revs where I wanted them. The only time I did a rapid launch was against David - I think my reaction was .4 - and with that I was still able to sit at his side... that is effectively .4 of a second off my 0-60, think my launch was fair... a shame I hit the limiter.

LWFW will make a fair difference and I will consider the brakes. My alloy mirrors must weigh 5kg more than the standard ones which are sat in my roof... another thing to consider... or perhaps remove entirely for a day at the pod to reduce drag lol.
Facelift Imola S4 | Cust K04's, Tubular Manifolds, 3" DPs->2.75" Catback | FMIC | PSS9 Coilovers + ARB's | Brembo 8-Pots | SS + DTS | 5??HP/475lbs/ft | 3.06S FATS on S4 Box

Sold: A4 (B5) 2.8 Quattro | Ivory Pearl
Melted: Corrado - IHI 1.8t: 343BHP

User avatar
Mik
4th Gear
Posts: 514
Joined: Sun May 04, 2003 9:54 pm
Location: London/Copenhagen

Post by Mik » Mon May 21, 2007 10:56 pm

12.4 is slow with your power. Do you have traction issues? Get a set of R tyres perhaps. Otherwise its your launch technique and/or shifting that needs optimization. A 400bhp S4 will do 12.5 with the right driver :lol:

You should be doing high 11's imho at least.

Cheers

Mik
2014 Suzuka RS6

MCB
Top Gear
Posts: 1670
Joined: Wed Apr 26, 2006 8:49 pm
Location: Manchester

Post by MCB » Tue May 22, 2007 12:45 am

Be interested to see what time were set at the Pod by RS246ers...
S4B5 Avant

User avatar
saf
5th Gear
Posts: 1334
Joined: Thu Mar 30, 2006 12:39 pm

Post by saf » Tue May 22, 2007 1:27 am

Mik wrote:12.4 is slow with your power. Do you have traction issues? Get a set of R tyres perhaps. Otherwise its your launch technique and/or shifting that needs optimization. A 400bhp S4 will do 12.5 with the right driver :lol:

You should be doing high 11's imho at least.

Cheers

Mik
I agree. 12.5 for 400 bhp one with right driver.

Leon - The quicker you react, the more of a difference it will make to your final time still.

I don’t think the alu mirrors will make much of a difference.

Maybe consider changing your shift pattern. Its not always the best thing to go all the way up to 6800 rpm. (or what ever the cars red line has been raised to. Try some different shifts at different rpms, see what gives a better response. Log with vagcom. There is not an option to do ¼ mile I think.

Id leave the brakes cause you’ll need them on the way home.


Id say the following:

1) LWFW

2) Back seats removed for the day, front recaros changed to pole position or a lighter seat, maybe for temporary use.

3) Practice getting quicker reaction times.

4) practice shifting quick and clean and check out where you do your gear change. Maybe better in some cases to practice not hitting the rev limiter.

Before all of this though I would concentrate on technique.

When doing drags, as you probably know, its a situation that requires multi tasking and thinking about several things at once and making sure those things are correct and the best way to react at that time. Eventually you will get used to thinking about everything automatically and it will be second nature just like everyday driving. That comes with practice.

So you need to be ahead of what you’re doing in your head mentally before you do it. This will make for a better launch.

Before amber gets to change, you already need to be revving at the correct rpm. Whatever style that best works for you, whether you want to bounce it quickly but keep it around a tight rpm band of choice, or just hold it there. Whatever gives yourself the best launch. Try different styles and find the best launch for you.

By the time you’ve launched you already need to have thought about changing gear, keeping wheel straight, looking at the rev counter as it gets up to redline pretty quick. This way you’ll never hit the limiter.
Change where you want to change, what ever suits the car better boost wise etc. then do the same for third gear and then fourth.

You should only be glimpsing at the track ahead, and giving 90% of your concentration on what you’re doing and what you’re going to do and looking at the rev counter and preparing to change gear to what you know from practice is the best rpm to change. Also try different ways of changing the gear. When changing gear get your hand in position for the next shift and position it to the best way you can react for the next shift. All these things shave split seconds which count.

The other thing is, never think about the guy next to you. No point. Concentrate all your thought on what you’re doing and what you’re going to do. That’s it. You’re racing your best time. No one else. Sometimes its hard as the adrenalin makes some people nervous but with lots of practice you get over it in time. Its only natural.

I’m not sure how many guys here regularly do 1//4 miles but I guess its quite a few. Their experiences may be different from mine, but I’m just giving some advice on how I improved my times and what I was taught by someone else.

Leon, honestly mate, before you start to take things out of the car to reduce the weight. Keep trying with what you have. Practice on your RS4 clutch till its dead. I think you’ll get to high 11's with some practice on that clutch.

The spin you took me for clearly shows you’re a good driver and can handle the car. Its just techniques that you need to learn to get a better time. Something everyone has to learn. something that only come’s with practice, and not naturally. If it comes naturally to someone its because they’ve done something similar that may incorporate a combination of the skills that are needed in drag racing.

Keep the clutch same, keep the weight the same. Leave that constant. Practice and burn your clutch out. (not your gearbox). By that time you should have high 11's if not better. then you can go for another clutch. Better your times on that, then when you’ve had some more practice then drop the weight.

At least then you know what you’ve done yourself and what you’ve improved before you played about with weight saving, clutch etc. Then you know how much the clutch flywheel combo is shaving off now that you’ve done the best you can with improved technique, then what the weight saving will do on top of that. Everything in stages with patience.


Otherwise mate, all that will be constant is your technique, and the car will be doing all the improvement. And a car is only as good as its driver in the ¼ mile. You want to see you’ve improved and know what you’ve done to improve your time before you start making the car improve your time.

As someone said on here earlier, it is an exact science. By all means I’m not an expert but I’ve had some experience, and if anyone thinks I’m talking rubbish then fair enough. Please contribute to how else he can make a better time.

Id really like to see you get a better time Leon, and if you let me know ill be there supporting. You probably know some or most of what ive written anyway, just need to put it into practice.

Good luck with your next ¼ mile times and hope you get your 11’s soon.

Regards

Sorry for the Essay!

User avatar
derdle
Cruising
Posts: 2690
Joined: Thu Mar 10, 2005 10:24 am
Location: Hertford

Post by derdle » Tue May 22, 2007 6:26 am

Leon, yeah it's the time honoured one..."lower your back seats"! Thinking about it though, shedding Kgs off the driver is also a consideration (I've never met you so I don't know whether this will touch a nerve - sorry!!) but you never see an overweight F1 driver!

Dunno if it was mentioned in Saf's version of War and Peace above, but the LWFW will save weight but you will have to be far more precise with your clutch and the gear changes - something that I feel may spoil your everyday driving pleasure (although that could be said for many changes you may make to the car).

Paul
RS4 in the only colour to have - Misano Red | MRC Remap | RS6+ brakes | H&R and Custom Performance Parts suspension |
Huge Grin :biggrin3: If you dont "do it now" you never will.

QuantumJohn
4th Gear
Posts: 585
Joined: Thu Dec 16, 2004 12:56 pm
Location: Kent, UK

Post by QuantumJohn » Tue May 22, 2007 10:22 am

Leon,
Do you suffer any wheel spin? Are you running soft tyres on those BBS wheels?
Take a look at what track day people do. Bring a spare set of track tyres with them and leave the back seats out.

It really depends how far you want to go. Weight reduction is key. The trim and glass is where the biggest reduction comes from. Change to perspex or polycarbonate and remove all the trim, go along this route and it won't be long before you start turning up with the car on a trailer :shock:

John

User avatar
dodgydave
3rd Gear
Posts: 391
Joined: Thu Jun 30, 2005 6:21 pm

Post by dodgydave » Tue May 22, 2007 10:29 am

If its just for that day on the drag strip I wouldn't bother with any of this and just add a 150-200hp shot NOS. Just my 2 P! ;-)
Never enough...

buzzard
4th Gear
Posts: 586
Joined: Fri Mar 11, 2005 11:50 am

Post by buzzard » Tue May 22, 2007 10:37 am

throw away air con.

less weight to carry all that goes with it.(motor,plumbing,rads,fluid)

plus less inertia to spin up and and come down on the rpm.

more air in through the front end--room for a bigger intercooler!!!
S4 B5 long gone
S4 B8 Stage 2

User avatar
GrahamS4
Top Gear
Posts: 2222
Joined: Mon May 08, 2006 7:41 pm
Location: Bucks
Contact:

Post by GrahamS4 » Tue May 22, 2007 11:28 am

Forget all of it. It's an Audi road car. Apart from rolling radius of wheels, maybe some dynamat and perhaps some heavier brakes, Zerok66 car is much the same as DavidT's in most aspects I'd say. The difference in power and similarity in times point to one thing only IMO - Davids greater experieince. In time I am sure Leon will get his times down through practice if he so wishes.

I was never close to the start line for any of their runs to observe the launches, wish I had now.
Present: 2010 Ice silver B8 S4 s-tronic saloon (standard)
Past: 1998 Agate grey B5 S4 saloon (MRC tuned)
Hers: 2011 Volcano red 8P A3 Sportback 2.0 TDI 170 sport quattro

S4TAN
Cruising
Posts: 3966
Joined: Sat Aug 05, 2006 12:05 pm
Location: Planet of the Apes

Post by S4TAN » Tue May 22, 2007 11:33 am

Rolskii had it right .... :wink:
Deus ex machina

User avatar
Peakz
4th Gear
Posts: 789
Joined: Sat Mar 03, 2007 2:02 pm

Post by Peakz » Tue May 22, 2007 12:44 pm

LOL
I noticed you didn't do a run Julian, going on a diet perhaps . . . ?

S4TAN
Cruising
Posts: 3966
Joined: Sat Aug 05, 2006 12:05 pm
Location: Planet of the Apes

Post by S4TAN » Tue May 22, 2007 12:55 pm

I noticed you didn't do a run Julian, going on a diet perhaps . . . ?
Yep - a liquid-only diet Paz... :lol:

Will do a run one day ... knowing my luck though i'd break the damn thing ...
Deus ex machina

Post Reply

Return to “Audi Tuning and Modifications”

Who is online

Users browsing this forum: No registered users and 39 guests