Biturbo's Audi S2

[Tom_]

do you still run a oem torsen+ rear diff + shafts?

[Biturbo]

why so oversize? do you have a restrictor?

Turbo takes how many it's need,better more then less

[my2000apb]

I would HIGHLY recommend a restrictor AND smaller line, you ll be going through turbo seals quickly the way it is

[Biturbo]

do you still run a oem torsen+ rear diff + shafts?

Center diff welded,custum drive shafts audi 200 cv joints and standard rear diff,but always locked on 1/4 mile

[Biturbo]

Set up on dyno was really good.It maks 654hp 700nm on 2.3bar and 641hp 800nm at 2.7bar boost.I run out intercooler that was rated 650hp .New intercooler rated 1000hp on the way to my home .

Weekend at santa pod was good,but not many runs I can do in FIA race.First run easy start ant testing car.Car feels faster but shifter too long.Second run on night,better but not good set up on launch control put me in lag and shifter still to long takes me 1.5s shifting,when usually 0.5s.Time 11.5s@129mph.Last run launch control set at 5200rpm and 0.2bar boost,track was very grip broken rear inner cv joint and rear diff.


October 13 I back to santa pod

[SteveH]

Nice, you need to sort out a stronger Diff and driveshafts now!

[Biturbo]

Nice, you need to sort out a stronger Diff and driveshafts now!

Driveshafts is strong now,need strong cv joints and diff.This diff was 7a one,I still have s2 to put in.Need good set up on start and will be ok

[prj]

What is revlimiter on car? Did dyno operator get scared at looking at the needle go off the scale and lift off?

[Biturbo]

What is revlimiter on car? Did dyno operator get scared at looking at the needle go off the scale and lift off?

Revlimiter 7900rpm,probably yes is not run more rpm that you see on sheet .Dyno owner told as that his dyno show less then other dynos,but is not problem we was on dyno 4h to set up,not just see that it have.33 power runs was made.I will put better intercooler and 20% methanol in fuel,then winter time will again on diffrent dyno just for power run

[DNA-S2]

DNA Autocare Ltd

[Biturbo]

Diff after sunday

[vcosmin]

hmm, strange do you always locked the rear diff ? I supposed it should be stronger, AFAIK Speeding G60 used locked Rear diff, with much more power, and slicks - and worked a few launches.

Also maybe this should help ?
http://hpower.de/shop/product_info.p...7492e91788514b
?

[Biturbo]

It was locked,but I think first broke cv joint and then on other side diff.That day track was super sticky and I lounch from 5200rpm

[vti2]

Put 2 V8 Torsen Diff's in it. One on tranny an One in the back and your Problems will be solved.

[Biturbo]

Center diff is welded.I will use typ 85 rear diff.They stronger then b3,b4 coupe.