Would a stripped out FL S8 manual be a good track car? - Page 6

RallyQuattro · #51 7th January 2015, 02:30 PM

And here are some extreme supercars that is faster than my big Audi S8
(but i hope to get a low 6sec run this summer)

chart for 100-200 km/h stock car times
4.2 - Bugatti Veyron 16.4 Super Sport - 1183hp
4.6 - Koenigsegg Agera R - 1130hp
4.8 – Bugatti Veyron - 1001hp
5.0 - Koenigsegg Agera - 953hp
5.5 – Koenigsegg CCX - 806hp
5.7 – Koenigsegg CCR - 806hp
5.8 – Mosler MT900 GTR - 600hp
5.8 - Ferrari F12 - 740hp
5.9 - McLaren 12c - 625hp
6.0 - Porsche 918 - 795hp
6.1 - Mclaren F1 - 635hp
6.1 - Porsche RUF RT12 R - 750hp
6.2 - Pagani Zonda F - 602hp
6.3 - Lamborghini Aventador LP-700 - 700hp
6.3 - Porsche 911 GT2 RS - 620hp
6.4 - Porsche RUF RT12 S - 685hp
6.4 - Porsche Carrera GT - 612hp
6.5 – Pagani Zonda R - 750hp
6.7 - Ferrari Enzo - 651hp
6.8 - Ferrari GTB 599 - 612hp

nakata · #52 7th January 2015, 04:29 PM

May be is more interested drag race on 1 mile.

pp RS8 = The ultimate car

RallyQuattro · #53 9th January 2015, 03:35 PM

Of course it would be fun to have a low 0-60mph or 0-1000 mile time, but I will not spend time and money to get that on my track racing car.

And I never need to make a quick start from zero on the race track, but I drive from 100-200 km/h all the time..

But this is not my project thread, and i wonder where this thread starter SilverS8 is?
Doesn't he have any questions ?

And will he build one S8 track car or not ?

nakata · #54 9th January 2015, 07:01 PM

I have a question, how you think about shorter differential? You can find 4.375 end rear (01R) and frond for 01E. And to make arrange of gears to be closer?
This will be better for track car, by me opinion.

RallyQuattro · #55 10th January 2015, 08:15 AM

If you have a small 4 cyl engine then you might want closer ratio on the gearbox but now we are talking about a V8 engine with a lot of torque!
And with a normal H pattern gear box with clutch every gear change take time.

But If you have a sequential gearbox then you can have closer ratio and optimize it for your power-band.

But S8 01E have close ratio same like an Audi S2/RS2 so I think it will work great for track race with an S8 engine.

But on my Biturbo V8 it was to close gears for me so I often jump from 3rd to 5th gear or from 4th to 6th gear.
So I have now put in a 01E diesel gear box in my car and I love it!
The speed I had on 6th gear on my S8 gear box I have now on 5th gear.
I think first and second gear is the same but after that it is longer between each gear.

And 6th gear is perfect for highway use when i'm driving to or from the race track.

Goran · #56 10th January 2015, 09:52 AM

I think you proved that a D2 with a manual box makes a perfect track car, in your videos you are keeping up with some really exotic stuff, light Porsches, etc.
It was funny when the little Porsche was trying too hard and spun off, thankfully he was ok. And the mustang was struggling in the bends too. 4wd is great

Also why would you need to spend money to get a good 0-60, you already have everything you need a twin turbo V8 and a 01E and 1765kg weight

I understand there's no point in logging a fast 0-60 in case gearbox gets damaged, I never do it either even with much less torque, I just do gentle starts before the clutch is fully engaged and only then floor it to the redline.

If a stock S8 01E book value is 5.4s to 100kph thats with 355hp, and your RS8 has 650hp, then I estimate your car could do 0-60 probably in just over 3.0s flat?

Has anyone ever broken a 01E? I keep reading Americans are putting it behind big-torque V8's and that it can handle something like 700lb-ft?
http://www.motorgeek.com/viewtopic.php?p=221427
http://www.gt40s.com/forum/gt40-tech...mission-3.html

this guy does some crazy stuff to his 01E, looks like he is launching from above 4000rpm
https://www.youtube.com/watch?v=AQB5_BzVO94
https://www.youtube.com/watch?v=59Rt9mB2tpM

andycaca · #57 10th January 2015, 10:59 AM

Quote:

Originally Posted by Goran

If a stock S8 01E book value is 5.4s to 100kph thats with 355hp, and your RS8 has 650hp, then I estimate your car could do 0-60 probably in just over 3.0s flat?

to be honest, a massive chunk of time lost in 0-60 sprints is in the change from 1st to second on a manual box. even a totally perfect shift will be over .25 of a second. plus unless you are running anti-lag or flatshift the turbo will need to spool up again too.

ive spent a few years racing turbo'd cars and although i tried using a short ratio gearbox i quickly realised that with a powerful engine (mine is circa 450bhp) you are needing to shift more often and are actually slower

0-60 with the short ratio box was always 4.0
0-60 with the standard box was 3.8

edit: before i got the sensible S8, i nearly bought a SLK tiptronic with 7 (or 8?) forward gears. that would have been awesome ripping through the box

RallyQuattro · #58 10th January 2015, 05:38 PM

Quote:

Originally Posted by Goran

I think you proved that a D2 with a manual box makes a perfect track car, in your videos you are keeping up with some really exotic stuff, light Porsches, etc.
And the mustang was struggling in the bends too. 4wd is great

Also why would you need to spend money to get a good 0-60, you already have everything you need a twin turbo V8 and a 01E and 1765kg weight

I understand there's no point in logging a fast 0-60 in case gearbox gets damaged, I never do it either even with much less torque, I just do gentle starts before the clutch is fully engaged and only then floor it to the redline.

If a stock S8 01E book value is 5.4s to 100kph thats with 355hp, and your RS8 has 650hp, then I estimate your car could do 0-60 probably in just over 3.0s flat?

Has anyone ever broken a 01E? I keep reading Americans are putting it behind big-torque V8's and that it can handle something like 700lb-ft?

The black and red Mustang in my Video have a lot of cobra chassis parts and they are biturbo charged, they have 2 old S2 turbos in each car, but for this year they have change engines to bigger 5.4L and the black is going for a bigger single turbo and the red car vill use belt driven Compressor but I hope I can drive faster than them again.

The problem I have is the grip on the street, So to get a low 0-60 time I can't drive on low profile 18" tires, instead I have to buy some drag race tires, but I can't use smaller than 18" because of my RS6 brakes.

The 01E is good but it is not bullet proof, I have friends with Audi S2 that destroys 01E gearbox all the time on drag race on the streets, but they drive low 9sec run on 402m so they have a lot of power.

Goran · #59 10th January 2015, 06:12 PM

Ah yes, good point about the wheels and tyres. I don't really have enough knowledge about drag racing or tracks and all the asdjustments and parts needed for each type of performance.
Its true I forget that with only 317lbft, and probably only 200lbft from 1000rpm, I don't have grip problems from a standstill. Your RS8 must have over 500lbft I'm guessing.

Quote:

Originally Posted by andycaca

to be honest, a massive chunk of time lost in 0-60 sprints is in the change from 1st to second on a manual box. even a totally perfect shift will be over .25 of a second. plus unless you are running anti-lag or flatshift the turbo will need to spool up again too.

ive spent a few years racing turbo'd cars and although i tried using a short ratio gearbox i quickly realised that with a powerful engine (mine is circa 450bhp) you are needing to shift more often and are actually slower

0-60 with the short ratio box was always 4.0
0-60 with the standard box was 3.8

edit: before i got the sensible S8, i nearly bought a SLK tiptronic with 7 (or 8?) forward gears. that would have been awesome ripping through the box

Yes good point, luckily with 01E there is only 1 shift to 60mph, 2nd is good to about 70mph with 18" tyres.
Its true manuals lose some time in the shift, but so much is gained in terms of weight and less power loss. Just look at D2 S8, with auto box 0-100 is 6.4s with manual its 5.4s. And Car and driver with a pro driver actually got 4.99s with a B6 S4 essentially same drive train as a S8, so with complete disregard for transmission crazy times can be acheived with a manual car.

RallyQuattro · #60 11th January 2015, 08:02 AM

500 ft lb I have already at 2700rpm

I did a power test on my RS8 in November 2012
This is my torque and hp in the engine.

1500rpm = 300 ft lb and 80 hk/ps
2000rpm = 350 ft lb and 130
2500rpm = 440 ft lb and 220
3000rpm = 540 ft lb and 310
3500rpm = 610 ft lb and 400
4000rpm = 635 ft lb and 500

Unfortunately, did a piston melt at 4300 rpm because of a bad ecu tune, but I bought another RS6 engine after that and got a good ecu tune that I have been using since then, but I have not tested my engine power again but will do it this summer.