Stavros

http://www.youtube.com/watch?v=lU785z8-2qI

been vids of this S4 hillclimber before, but never seen this nice compilation one before, fucking awesome car

xr4x4rs

iTrader: (5)

is it supercharged?

sounds so nice

Alan s1

Stavros

twincharged, but properly, turbo blows thru the supercharger

XR-RS

i tried for ages on friday to find that vid and couldnt, dunno why maybe just missed it

i couldnt for the life of me remember the drivers name, and still cant

wirralphil

was just about to post this.

quite quick aswell

Stavros

I just typred in Delta S4 into youtube, its like the 3rd vid down or summat.

Driver is Bruno Ianniello

XR-RS

what a flid, i searched for ages as well

bruno ianniello cheers was doing my nut in on friday,lol

Anonymous

twin turbo and supercharger....AWESOME

Stavros

single turbo mate

donny murdo

Seen some footage of this car before. Awsome, noise of it is fucking incredible

TimC

iTrader: (1)

does this car have its own website or anything of the like?

XRT_si

iTrader: (2)

Stavros - is this related to your own balloon inflator/turbo combination

Noticed that in the early videos of the S4 it doesnt the make the dump valve sound?
I assume the set up was changed but fook me does it sound good

Would have been amazing to see the develop properly

Paulo P

Compound charged which means it has a super charger and a turbo charger There's a crossover point but the S4 revs to 9k cleanly! They produced around 450bhp 20 years ago

XRT_si

iTrader: (2)

From a 1.8 too

Stavros

Im 99% sure there is NO crossover point on the S4 setup, there no point, thats just myth like wastegate chatter.

The bypass is used for idle and off/light throttle. You get horrendous pre-throttle boost spikes off throttle if you didnt have a bypass of some sort then, high enough to break summat.

rscossie86

Seen this car live at Rechberg in Styria(Austria)
The first event of the FiA - European Hill Climb Championship every year...


I can tell you, live it´s even more awesome to watch and listen to!

"holy sh..." were the first words that came to my mind

Turbocabbie

DOHC 16 valves total - 4 valves per cylinder
1759 cc (107.341 cu in)
Compression ratio -7.60:1
Fuel system - Ma-We fuel inj.
Aspiration - T & S/Charged
Compressor type - 1 Abarth supercharger & 1 KKK K26 turbocharger
Intercooler -2 air-air
250.00 BHP (184 KW) @ 6750.00 RPM (1985 homlogation cars)
215.00 Ft-Lbs (291.5 NM) @ 4500.00 RPM

480 bhp (358 KW) @ 8400 rpm (1986 works cars)
490 Nm (361 ft lbs) @ 5000 rpm

Turbocabbie

Officially the most powerful works S4 car produced 550 horsepower (410 kW). Unofficial figures claimed this S4 could accelerate from 0 to 100 km/h on gravel in just 2.5 seconds. Henri Toivonen drove this very car on the 1986 Corsican Rally, where the Finnish driver inexplicably missed a tight left-hand hairpin bend and plunged into a ravine, where the S4's fuel tanks exploded.

Awesome car but many people believe they are more powerful than they actually were, it was the power to weight ratio that made the S4 something special

smithy20vt

Fantastic car

GARETH T

i had a good look at one a few years ago at goodwood, im sure there is a crossover point

Stavros

How would looking at one at goodwood tell you that?

I know for a fact the only vehicles (2 cars and a good few big rig trucks) ive seen with this system (ie turbo blowing thru charger) do not bypass on boost, as it would defy half the reasoning for it. Infact a few of the people laughed when I asked them about that side of things.

All off them had bypasses though, the two cars used adapted external wastegates, and the trucks used something similar but seemingly custom made. All the bypasses were for off throttle and low throttle running.

The one car previously had no bypass at all, but this caused issues due to the throttle being downstream of the supercharger meant there was huge pre throttle boost spikes when he let off the gas, causing extra heat, mega loud whining front the charger as its working hard against a shut throttle, and even a bent throttle plate and split intercooler.

He solved it by adding a second throttle pre supercharger too, but fitting the bypass to be open at light and no throttle made the biggest difference to drivability.

cbp

There is a crossover point in the supercharger unit..
http://www.autozine.org/strange_car/..._s4_charge.jpg

Anonymous

oh my mistake i thought i heard of a twin turboed supercharged one,obviously not.


Still fantastic...and regard Henri's crash apparently he was suffering from the flu...my opinion is that an S4 and flu could never mix

Stavros

I KNOW theres a bypass, as the diagram shows, but IMO the talk all over the net and books and vids that it bypass when on boost is bollocks, just like "wastegate chatter".

It was for off/light throttle running im almost sure (as they need one then for reasons ive explained above), as it serves no purpose bypassing when on boost, lots of downsides to that too.

cbp

Well the compound charging was not too ideal i think as the car they where going to use in Group S had twin turbos with one turbo on each side of the block and 600 bhp as a starter...that is a nice setup..
www.deltaintegrale.it/1/tec/triflux.htm

Steven_RW

Nice drift in the first few seconds

what a machine

RW

Daviet

downloaded this ages ago.car sounds amazing

_DAN_

Awesome bit of kit. How mental does that look going up the hills.

Love it.