- Post is under moderationWords Davy Lewis Photography Jape Tiitinen
NEED FOR SPEED
This #1989-Audi-Coupe has evolved into, probably, the fastest car on the streets of Finland, with a 0-62mph of 2.3secs, and over 1100hp…
Flying Finn – 1100bhp Coupe
Over 1100bhp from this #S2-engine’d monster
It all started back in the winter of 2010 when I bought the car,” explains owner, Henry Riihelä. “I had a 350hp Audi Ur-S4 at the time and was planning to start tuning it to the extreme. Fortunately, my friend and one of the current IMSA-Sipoo team members, decided to sell his already tuned Audi Coupe quattro to me. The Coupe suited me much better anyway because it’s much lighter.”
The engine had already been done and it’s testament to the quality of the build that it still runs the same forged internals that were fitted by the previous owner in 2010. Even more impressive when you learn that it’s currently running 1102hp and 1043Nm at 2.9bar! “That is the one reason I believe the engine is still in one piece with the same internals,” says Henry, “because I always take logs from the ECU when I drive it hard and adjust things if necessary – it’s saved me at least one catastrophic engine failure.” The Coupe began with a Holset HX40S turbo and made a very healthy 662hp and 775Nm at 2.7bar on what was then Shell V-Power 99. The spec remained for a couple of years with Henry doing about 30,000km in it.
“Then in 2012 I changed to E85 fuel and with the HX40S made 698hp and 746Nm at 2.1bar.” However, the turbo was maxed out. Even so, the car ran 100-160km/h in 2.85secs and achieved 100- 200km/h in 5.3secs. “It killed a couple of fast 911 Turbo Porsches on the street – they were sold right after that,” laughs Henry.
Next came an HX50 in 2013, which Henry admits was an error “I should have gone straight for an HX55.” Even so, with some Toyo R888s fitted to aid grip and the Tatech ECU upgraded from a 6 to a 32, the now 840hp and 860Nm Coupe did 100-200km/h in 4.6secs and 200-300km/h in 12.1secs. “It outran some fast bikes on the streets,” smiles Henry. “But the rear drive shafts started to bend, so a set of billet items were made.” Fast forward to 2014 and some CatCams were fitted, together with solid lifters, while the turbo was swapped for the more capable HX55. “It made much more power at the top end, but it made the same boost at lower rpms as the HX50, so it was all win,” says Henry.
The car made a best figure of 1019hp and 985Nm at 3.16bar, but it was driven at a less stressful 2.9bar giving around 950hp all summer. Henry continues, “The best races were against a 308whp turbo GSXR 1000 and a 303whp turbo Hayabusa. We did a couple of races from 80-300km/h – the GSXR lost and the Hayabusa runs were dead even. We were all shocked. Nobody thought that this little Audi would be that fast – including me.” That summer. Henry took the Coupe to a non-prepped drag strip where he achieved a 9.9sec quarter mile at 240km/h. “It was a very hot day and I had not tuned the car for that kind of weather (so was running a bit less power), but it was still a real 9sec street car on a non-prepped track and street tyres,” says Henry.
Also that year, the car did 0-100km/h in 3secs, 100-200km/h in 3.9secs and a standing mile event with a top speed of 337km/h (209mph) before he ran out of gears. It was here that Henry chose to upgrade to a PAR Engineering dog box and sequential shifter, which he says, “Was a big mistake.”
Sadly the season ended even before it actually started. “First #PAR-Engineering sent the gearset six months late and in my second full pull on the street, the main shaft broke – I was pissed. So we quickly made an IMSA Sipoo main shaft with a bigger chevy spline and have had no issues with that. But the summer had already turned to autumn and the weather was cold, limiting traction.” Despite the cold weather, Henry achieved 0-100km/h in 2.3secs, which is damn impressive. He also discovered he could get all four wheels to spin at 200km/h (124mph). He went on to lay down some epic times – 100-200km/k in 5.5secs and 80-120km/h in one second dead.
This brings us to 2015, where a few other upgrades were deemed necessary. “We fitted an FHRA-spec roll-cage – the goal was that the car should still weigh the same once it was fitted – 1240kg.” This entailed saving weigh elsewhere, which included a composite tailgate with polycarbonate window (-15kg); the sunroof was removed (-16kg); excess removed from interior (-15kg); lightweight race battery fitted (-15kg). At this point a Quaiffe LSD was installed up front to aid traction, while the piston pins were changed to heavy-duty items (the old ones were starting to bend) and the exhaust manifold swapped for a larger item. The cylinder head was also ported to the max and the intake manifold was tweaked with larger valves fitted. “On the dyno, with same HX55 hybrid as last year, but less boost (2.9bar) we made 1102hp and 1043Nm.
And that pretty much brings us up to the present day. “Nothing special was done for 2016,” says Henry. “We changed to a Wavetrac LSD at the rear and by the start of the summer broke the PAREngineering 3rd gear due to the malfunction of the SQS shifter. The shifter never really worked well, so I had to change the H-pattern back.”
“My goal was always to make it the fastest car on the streets of Finland – an ultimate sleeper. I think I’ve achieved that now,” says Henry. But he’s not done, not by a long shot. “For 2017 my goals are an 8sec quarter mile and to achieve 0-300km/h in 11secs – both on a street surface, rather than prepped drag strip. I think I have achieved what I started out to do and made the fastest vehicle on the streets of Finland. I just have to get the new air shifter gearbox done – and if someone is faster I’ll have to order an HX60…”
SPECIFICATION #Audi-Coupe-Quattro / #1989 / #Audi-Coupé / #Quattro / #Audi-Coupe-B3 / #Audi-Coupe-Typ-89 / #Audi-Coupe-Quattro-B3 / #Audi-80 / #Audi-80-B3 / #Audi-80-Typ-89 / #Audi-80-Coupe / #Audi-AAN / #Audi-Coupe-Quattro-Tuning / #Audi-Coupe-Quattro-B3-Tuning / #Audi / #Holset-HX55 / #Holset / #OZ
Engine #AAN 2.2 5-cylinder, stock crankshaft (balanced, nitrided and polished), #Wiseco pistons and piston pins, #PO-Metal connecting rods, water jacketed cylinder block and head, #Holset-HX55 hybrid turbo, #Tial 60mm wastegate, IMSA Sipoo big exhaust and intake manifolds, 4,5in downpipe, 4in to 2x2,5in exhaust (side exit), butterfly valve to bypass mufflers when boost pressure goes over 1bar, #IMSA-Sipoo breather/catch tank system, #Cat-Cams camshafts with solid lifters, oversize intake valves, billet intercooler (as big as it can be), 1xVeyron fuel pump to surge tank, 2x #Bosch-044 to engine, #Bosch #Bosch-EV14 2200cc injectors, #Aeromotive FPR, #Tatech 32 ECU with special features: (rolling launch control, rev limiter by gear, shift cut by gear), 034 motor mounts.
Power 1102hp and 1043Nm @ 2.9bar on E85 fuel
Transmission 01E 6-speed IMSA Sipoo/PAR-Engineering dog box, SQS sequential shifter, Quaife front LSD, Wavetrack rear LSD, PO-Metal billet flywheel, Tilton 2-plate clutch with line lock for LC, Karpiola billet drive shafts, 034 transmission mounts
Brakes D2 8 piston calipers with 330mm discs (front), #Audi-S2 stock (rear)
Suspension #KW3 coilovers with stiffer springs, Whiteline rear sway bar, aluminium subframe pushings (rest polyurethane), reinforced control arms
Wheels & Tyres 8x18 #OZ-Ultraleggera with 225/40 Toyo R888 tyres
Interior Fully stripped with FHRA spec roll cage, Sparco racing seats, Vems wideband lambda and EGT gauges, shift light
Exterior RS2 front bumper with IMSA Sipoo front splitter, fiberglass trunk lid with polycarbonate glass, sunroof removed Tuning contacts/thanks IMSA Sipoo, Petteri Lindström and Antti Oksa, Tatu (Tatech), Check out YouTube: 4WDDR
“Nobody thought this little Audi would be so fast, including me”
“It killed a couple of fast Porsche 911s on the street”
Above: One very happy owner.
Left: Intercooler dominates the front.
Below: Cage and bucket seats.
Above: Big brakes and lightweight #OZ wheels.
Above: This monster gets used on the road.
Right: Side-exit tailpipes.
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- The beast. The S2 with over 1100bhp you ran last issue was a monster! I love S2s anyway, but this is on another level completely. Really enjoyed the The beast. The S2 with over 1100bhp you ran last issue was a monster! I love S2s anyway, but this is on another level completely. Really enjoyed the story showing how the owner progressed with the build – lots of great information and a little window into the world of extreme power builds. And it’s another can from Finland – how come they build so many crazy Audis? Must be something they put in the water. Anyway, keep it up. More ...
- Thanks, Tommo. I have to agree with you, that S2 is an absolute animal. As to why there are so many big power cars in Finland, must be something to doThanks, Tommo. I have to agree with you, that S2 is an absolute animal. As to why there are so many big power cars in Finland, must be something to do with those long, harsh winters – nothing else to do apart from tinker away in the garage. More ...
- A correction. The owner of the S2 featured last month has pointed out that the 100-200km/h time was printed incorrectly. It should have said 3.5secs nA correction. The owner of the S2 featured last month has pointed out that the 100-200km/h time was printed incorrectly. It should have said 3.5secs not 5.5secs. Sorry Henry. And damn, that makes it even faster than we thought. More ...
- Post is under moderation/ #Audi RS4 B5 with a 5-cylinder engine / Words Davy Lewis / Photography Andreas S Jansson and Bjorn Eirik Odegård
This track-prepared RS4 is running a #5-cylinder-engine that makes 939hp – now there’s something a bit different…
RS4 B5 940hp 5-cylinder swap
Doing things differently is a risky business. Get it right and you’ll win the respect and admiration of your peers. Get it wrong however, and people will tear you apart on social media. This couldn’t be more relevant than in the car scene. From choice of wheels, to the tricky subject of rear wings – an upgrade that wins the internet with its ingenuity and originality is only a hairs breadth away from a total balls-up that incites derision and hate. People are funny, eh?
So where am I going with this? Well, one of the most fiercely loyal of all Audi enthusiasts are the RS4 B5 guys. Many view this as the only true RS4. The real deal. The big kahuna. The daddy. And you know what – I’m inclined to agree. There’s something about that wide arched, 2.7 biturbo-powered avant that is bang on the money. Never mind the fact that most of them will spend an inordinate amount of time in the garage, simultaneously emptying your wallet and making you cry into your Aldi value beans (cos that’s all you’ll be able to afford as a B5 owner). But, they’re a passionate, dedicated bunch and I applaud that.
So what on God’s earth are they going to make of an RS4 with a naughty secret under its bonnet? You see, this track-focussed RS4 has a cylinder missing. Or, to put it more clearly – it has one less cylinder than it should. But why would anyone remove a perfectly good V6 biturbo and replace it with an old five-pot?
Well, for starters the V6 wasn’t perfectly good. The owner had been through numerous turbos and frankly he was sick to the back teeth of removing the damn thing to fix it. The B5’s engine may be a masterpiece when working well, but get a recalcitrant unit that has frequent issues, and you too could grow to hate it. Add to this the fact that Aslan Eshanov is based in Norway and it becomes clear. These guys don’t think like us.
They go their own way, which is why so many insane cars appear from the frozen lands of northern Europe. Anyway, when you’ve got a nice five-cylinder sitting in the garage, it would be rude not to make use of it. But there’s more to this story than a simple track project build…
The RS4 was actually impounded by the police after they discovered it had a false chassis number. Aslan was prosecuted and fined 23,000 euros (the price of the car’s import tax to Norway). Gulp. So, he hired a lawyer and fought the case in court, proving it was the previous owner who had committed the fraud. However, after a total of 60,000 euros had been spent, Aslan was told that he still could not use the RS4 on the road unless he paid a further 23,000 euros. “I could not afford to do this, so I decided to build a full track car,” he says. So before anyone shouts, “what a waste of an RS4” – it was either build a full-on track weapon, or it would never be used at all.
The project began in July 2014 in Aslan’s basic, unheated garage with only ordinary tools. “I worked a lot in the summer, but not so much in the winter as it was -20 outside and still -10 in the garage.” He spent around 14 months on the car, having to work much of the details out for himself as well as fabricating many bespoke parts.
You can read the full engine spec on the last page of the feature, but it’s based around a 2.5 TDI block, with forged rods and pistons. There’s an AAN cylinder head and CatCams that allow this strong bottom end to withstand a 10,000rpm rev limit. Everything needed to be strong, because Aslan likes to give it a serious kicking. You may have seen videos of it being nailed sideways around the track at various Gatebil events.
Watching this RS4 performing brutal four-wheel power slides never gets old and with 939hp on tap, it’s some crowd pleaser. Listening to that beefy, Precision turbo snorting and chuffing away, accompanied by the roar from the 3.5in exhaust really is something special. It’s a raw, unrestrained sound that is all the better for being produced by an engine with an odd number of cylinders.
Thankfully, the outside has been left pretty much OEM. The only additions are a Leon Cupra front splitter, some tow straps and US-spec side marker lights. The fact it isn’t covered in some crazy livery or emblazoned with sponsor’s logos, only adds to the appeal of this RS4.
Inside it’s a different story. The dash remains, but pretty much everything else has been removed to make way for a comprehensive roll cage and the fuel system, mounted in the boot. There’s even a rear-mounted radiator, inspired no doubt by the Group B cars of the ’80s. Sensibly, Aslan has installed a firewall, to keep himself away from the fuel system.
The wheels are as wide as possible to allow for maximum traction – they measure a girthy 10.5x19in all round, wrapped in 275/30 semi-slick track rubber. However, a set of 18in Rotas are used for drifting with smaller 235/40 tyres.
There’s plenty more to come from this rather immense RS4. It’s an unconventional car, with a chequered past, but there’s no denying that it is 100% savage. Aslan reckons there’s another 200Nm of torque to be had, so it’s set to become even more of an animal on track. It’s a shame it can never be used on the road in Norway, but I guess that means that it’s never going to be a compromise. This RS4 is all about going insanely fast (often sideways) and for that, I give it a big nod of respect.
SPECIFICATION / #Audi-RS4-B5 / #Audi-RS4 / #Audi-A4-B5 / #Audi-A4 /
Engine Self build 5-cyl 2.5 20v Turbo, 2.5 TDI long block from 94-97 A6 (same block as Transporter T4) with custom CP-service pistons and #Rosten-Performance H-profile rods, #Audi-Ur-S4-AAN cylinder head from S4 C4 91-94 rebuilt to mechanical lifters and #CatCams for higher lift on valves and can run 10,000rpm, modified #AAN intake manifold from 2.2 20v S4 C4, Nuke fuel rail with 1600cc #Bosch injectors, custom exhaust manifold for B5 with 5-cyl engine, #Precision / #Precision-6466CE turbo, Tial 60mm wastegate, #Tial Blow-off valve, 3.5in exhaust all the way and 2x 3.5in tailpipes (Diesel look), 4in intercooler, big oil catch tank with return line for oil back to the oilpan, #Autronic-SM4-ECU , Audi R8 coils, #Accusump oil accumulator (stabilizes the oil pressure in engine)
Transmission OEM RS4 B5 transmission, OEM drive shafts, Tilton 2-plate clutch good for 1500hp
Power 939.8bhp and 983Nm at 2.3bar of boost on E85 fuel
Brakes RS4 B7 brakes in front, OEM rear brakes, hydraulic handbrake
Suspension #Øhlins 3-way coilovers, #H&R ARBs front and rear, #PowerFlex bushings / #Öhlins / #Ohlins-Racing
Wheels & Tyres #BBS-CH / #BBS 10.5x19 with 275/30x19 semi slicks, OEM RS4 and Bola B1 (Rota grid) drifting wheels with 235/40x18
Interior OEM dash, #Sparco / #Sparco-Pro-2000 black seats, Sparco 4-point red belts, full “rally” roll cage, rear mounted radiator with water pump in boot, 3x #Bosch-044 fuel pumps for E85 fuel, 60-litre fuel cell, Nuke fuel catch tank, 2x #Nuke fuel filters, firewall between boot and rear of cabin
Exterior Leon Cupra front spoiler, US side marker lights, tow straps, tinted windows, OEM paint
Tuning contacts/thanks Tuned by #RFS-Performance in Norway. 939.8bhps and 983Nm at 2.3bar of boost on E85 fuel (not finished with the tuning, need to adjust cams to push out around 200Nm more)
Top: Cheeky on-road shot of this epic track car
Below: The plate gives the game away...
Left: Rear firewall and extensive roll cage Below Left: Interior is driver focused.
Bottom: Just a regular RS4...
Above: Aslan kicks the RS4’s arse on track.
Action photographs: Bjorn Eirik Odegård
Below: Rear-mounted cooling system.
“The RS4 was actually impounded by the police...”
Below: View through the rear window gives the game away.Stream item published successfully. Item will now be visible on your stream.