Hands down, one of the best and most iconic blow off valves ever installed onto a vehicle. Period.

The I5 turbo is a sound you never forget. The grand-daddy of engines for the to be VAG group. This engine is called an "anchor" as it sticks way beyond the front axle and when you let off the gas the thing just drops the nose as you threw an anchor. Same time, this engine is almost indestructible, it came in Group B with the tech knowledge of Porsche in the turbo work. This thing can handle 800+ HP on a factory block and a wise tuner.

Hey there, couple of tidbits on Audi's race programs and the engineering of these iconic cars. The "turbofan" rims are infamously cool and have had somewhat of a resurgence over the last decade. The reason they exist is bc wheel wells are aerodynamically notorious since they often struggle to evacuate brake cooling air and tend to trap the fast moving air underneath the car on top of that. When cooling brakes, the evacuation of the cooling air is almost as important as the brake ducts getting it there in the first place. This is the reason modern LeMans prototypes and aero focused race cars like the Viper ACR / GT3RS have vents (or straight up a hole) over the front wheels which is intended to remedy that very issue. The solution Audi chose was brilliant but a copy; Porsche had 'invented' the trick for it's 935 race car which also competed in Trans-Am to cover the rims with a flat surface on the outside for less drag and mounting blades in the 1-2 inch space between the rim and the cover which are bent in direction of the wheel turning so basically it's an air compressor which forces the high pressure cooling air out of the rim and by extension the wheel well. Two birds with one stone! The other worthy mention is the AWD system Audi had developed which uses a really neat trick: Imagine how in a traditional AWD car with a longitudinal engine there's usually a transfer box connected to the gearbox by a very short drive shaft which then sends power to the front and back diffs through 2 additional drive shafts. The front axle drove shaft therefore needs to be routed around the exhaust headers, steering assembly etc which makes most AWD cars have a very high hood. Audi had patented a gearbox combined with a transfer box at the end of the output shaft (read this twice) which sent power back *through the output shaft of the transmission* to the front wheels. I repeat: the gearbox output shaft is hollow and houses the drive shaft for the front wheels while spinning in the opposite direction from the output shaft with the rear wheels powered like a traditional RWD car. The front drive shaft ends just a few inches behind the bell housing, is split and comes out on either side of the gearbox. This is a truly ingenious design which was responsible for Audi insisting their AWD was so very capable and made them invest loads of money to advertise it through motorsport. The drawback of this design is the entire engine block has to be placed in front of the front axle or rather the gearbox needs to be in line with the front axle which makes equal weight distribution really difficult so Audi moved the radiators and oil coolers to the rear of most of their race cars. Still, a packaging masterclass that quattro system. It's important to note how motorsport was not only seen as a simple advertising exercise by Audi since they were first to try and sell people on the inherent value of AWD cars, be that on tarmac or loose surfaces, the good old "Race on Sunday; sell on Monday" philosophy. At the tragic end of Group B in 1986, they made the decision to to join the Trans-Am series in '88 and could carry over most of the drivetrain from their rally car. The engine in the Trans-Am Audi was the same as the latest version of their rally car: a 500-550hp 2.1L turbo I5 with SOHC running on 2.8Bar (40psi) of boost, basically their tried and true rally setup which was quite reliable for the time. They weren't the first team to chose a small displacement turbo engine as Porsche and Nissan had both done it in previous seasons. At the time, the US competition did not have an answer to this kind of car. It's ultimately self explanatory why they won the championship that season: All other cars on track were RWD coupes with basically the entire field running NA V8s which of course struggle for traction on corner exit while the Audi more or less could just floor it at the apex. The top 4 competing brands of the '88 season being Chevy, Oldsmobile and Mercury (Ford I guess?), all of them bested by the new kid, Audi. At the end of the '88 season AWD cars and foreign produced engines were banned from Trans-Am which made Audi quit the competition but they already had a prototype in the works for another competition. They joined IMSA and turned another racing series on it's head, but this time there were *waaaay* less regulations to follow compared to Trans-Am. The IMSA Audi 90 may look like a widened version of the Trans-Am car but was in fact a completely different chassis and a completely different engine block. In Trans-Am, the regulations stipulate the roof of the car to be made from steel, it could only be as long as the original road car and I believe they had to use the original floor pan of the production car while the IMSA 90 was just a steel roof with a tube chassis underneath from front to back with removable fiberglass body panels. The engine of the IMSA 90 was an all aluminum 2.2L turbo I5 DOHC with adjustable wastegate running 2.3-3.6 bar boost (35-52psi) producing an eye watering 720hp. In 1989... Still impresses me. If you ever get to see the engine, it becomes quite clear they went all out with this one. The titanium head studs which are normally bolted to the engine block instead run the entire height of the engine and end at the dry sump oil pan, almost as if you're using a ratchet strap all the way around your motor to keep the cylinder head from lifting off the block redneck style :) The Audi V8 quattro DTM was raced in the German touring car championship (DTM means just that) from 1990 onwards and was subject to a lot more regulations than Trans-Am and IMSA. In DTM, the original dashboard and doors had to be used and turbos had been banned in '90. The production V8 was relatively small at 3.6L but in race trim it revved up to 9.500rpm and apparently was shifted regularly at 10k. When introduced, it produced a cool 420hp but in the '91 season it produced over 460hp. Yes, it sounds absolutely gorgeous. The gold BBS rims are iconic, too. It's worth mentioning how 90's DTM was dominated by NA I4 engine coupes while this was Audi's full size sedan with its biggest production engine, which is pretty cool but also meant the Audi was a lot heavier than his competitors. Merc and BMW were supposedly some 320kg (700lbs) lighter but could not compete on high speed tracks since their NA I4 engines 'only' produced up to 350-380hp at full song. Since older Audi seem to be to your liking, I've got a suggestion I can highly recommend: 3 years ago, 3 of the Hoonigan guys visited Ingolstadt and since at least 2 of them are German car fanatics (the other one is a rally fan so he's just as into it), they were shown around their "secret stash" of priceless race cars and prototypes which are not open to the public. It's almost 30 minutes of old Audi race cars ranging from 1919 to today and I watch it about once a month just because I truly wish I could enjoy seeing such an extensive collection or even owning any of such great cars myself once in my life. I can't overhype it, it's absolutely brilliant, sadly no engine noises :( kzfaq.info/get/bejne/Z7-RbKSD373Uo5c.html Cheers Ian, I hope you and yours are doing well. I knew this would be a long one but then I had to add this and that.. So yeah, I love old Audis, too :) Have good one!

I worked at the Porsche/ Audi dealership in Colorado Springs in 1986/87 when Audi brought the Coup Quattro rally car to run the Pikes Peak Hill Climb. “The Race To The Clouds” They had 3 engines for the car, a 400, a 500, and a 700 horsepower turbo 5 cylinder. They used the 500 horse because the 700 horse was too much and would just spin the tires on the straights on the still gravel road. It was awesome to have the car in our shop and to be on the mountain to watch it run.

I have seen the IMSA GTO in the Pace Museum in Dortmund, Germany. The owner of the museum has good ties with the German manufacturers and the put different cars in the museum every 6 month. The Porsche 959 Demo Car from the original presntation IAA in Frankfurt was also there and a lot of GRoup 5 cars from the late 80s as well as 2006 Sauber BMW F1 car. The owner is JP Kraemer and has his own tuning shop and youtube channel @JPPerfomance.

I had a tuned Audi 200 turbo (i5) from 95 to 2000 with a stainless exhaust that sounded amazing, it was addictive and tended to make you drive in a manner the attracts police like flies to shit. I still reminisce about it to this day. Like all things, it probably wasn't 'fast' by modern standards but was quick enough that it never stopped raising my heartbeat.

I remember when Audi came up with this Audi GTO model which was based on the Audi 90 quattro in these days. Audi has been looking for a new challenge after dropping out of the WRC. They wanted to conquer the American market and start by participating in the GTO series. Audi was able to secure the participation of Hurly Haywood, Scott Goodyear, Hans Joachim Stuck and Walther Röhrl as racing drivers. Röhrl in particular played a key role in setting up the car. He still works in this capacity for Porsche today. In 1990, Audi left the GTO series again and started with the V8 in the DTM with Stuck as the driver.

look for a video called "unfair advantage" it goes into Audis racing in the US.

The Audi IMSA GTO was so fast it was handicapped. Despite that it still beat all the v8's in it's group.

These rims are called turbofans. They‘re made from Magnesium. Purpose is to add cooling power to the brakes to avoid fading. Unfortunately hard to get your hands on older ones bc availability and price (up to 10k😅) Not to mention the recommended x-ray to find hidden cracks (no kidding)

You can get this Audi 90 IMSA GTO as a regular Hot Wheels Modell, maybe its allready out there in the Shops or in the following releases this year. Greetings from a 1/64 Diecast Collector from Germany. 😄

The Trans Am is by far my favorite Audi of all time... The first time I saw and heard this beast on TV I was hooked. I own a 200 20VT, just wish I could afford the body work.

Man, that's one of the reasons I love your channel. The sound is soooo incredibly emotional. It doesn't matter if the engine is the most efficient or not or whatever, but the sound is really what makes you go "WOW!". And let's be honest, who needs a V8 when you have one of those old 5 cylinders 🙂

When they banned group B rally cars, they started using them in European rally cross.. There was many interesting cars back in the days..

Audi inline 5 cylinder engines are freakin awesome

I really love the American V8. But i saw this Audi live. Its the greatest Sound ever.

Very unique sound, inline 5 turbo. I like it.

The trans am and the imsa were so dominant that they got banned and handicapped left and right Extremely awesome cars

This... is magic. That era of IMSA/DTM/ITC was mega! My favorite was the Alfa Romeo 155 V6 Ti..

what you might be interested in is the birth of the name "Audi". Back in the year 1928 there were 4 automobile producing companies were put together under one common name. These were "Horch" (german command for "listen !"), "D.K.W." (Dampf Kraft Wagen - steam powered car), "Wanderer" (cars only producing company) and "NSU" (a short form of the town of Neckarsulm, where the company was lacated). But there had been a term within that contract that said they were NOT allowed to call themselves "Horch". So they used the latin (Rome, year 0) translation for it and called it "Audi", what means the same 🙂

The video is epic, shot near our hometown in Germany. The 200 trans am is 10v and the imsa gto 90 is 20V. The V8 is 36v NA

The TransAm Car was based on the Audi 200turbo version which is wider in the spur nearly as wide as the V8 plus fat side vents… raced 1984/85 by Hurley Haywood, Hans Stuck and seldomly Walter Röhrl as d‘Artagnan of Stuck.

good for you, you found the Imsa GTO. now watch the Doku about Hans Joachim Stuck and Walter Röhrl and the Audi 200 quatro trans-am

... the sound of Audi Auto Union Typ C... if you like sound check this thing. Read about the power these things had. And they drove on the "old" Nuerburgring... You will like it. Greeting from Germany 🙂

They ride at Sachsenring, Germany, where the MotoGP World Championship will be held this June. I'm looking forward to being there again.

Great reaction and I really like the sound of that "beast". Over 700 HP... amazing !

Man these inline 5's and the VR6 lumps sound incredible. Daylied a Golf 2.8 VR6 for a while, the noise was so addictive I could get it as low as 6mpg on the trip computer lol.

Makes me miss my old Ford Focus Mk2 RS as that had an in-line 5 cylinder engine.. Mine had a full Milltek system on it & a stage 1 remap.. Just love that I5 sound 😍🔥

The best sounding engine, which is why I want to swap one into my 2005 a4 avant 2.0 tfsi quattro. Not sure if it's even possible but I want that sound.

The Trans Am car was also an off the assembly line build while other manufacturers were using tube frames.

The last one at least have similar features to the cars that came out on the streets... :D Great sound!

South Africa ran Audi 5 cilinder turbos, Opel Rekord V8, and Triple Rotor Mazda 323 is the Wesbank Modified Saloon Series in the late 80's and early 90's. A glorious mix of screamers. The best days of my life was spent at Kayalami watched these monsters battle it out.

This is my favorite Audi of all time. It whipped a lotta ass too.

Greetings from Germany, your vehicles are an unattainable dream for us. Audi/BMW/Mercedes are impressive. 🙋🏽‍♂️🇩🇪

you realy need to check out the story behind the AUdi IMSO GTO

I was grown up 30 miles away where that car was built. South germany bavaria.

That AUDI IMSA ate his liver with a nice bottle of Chianti...

Superstock teams champs on in Palmerston North, NZ this weekend. See if you can find the live stream, or check out some of the last couple of years' highlights

I‘m generally a wheel cover hater but those somewhat funnel shaped rims actually go kinda hard.

You can hear the Turbo arguing with the other cars 💚

I had 4 five cyl cars in row, kinda miss them

You should look for "Farine de Blé " in France. He his getting an Audi 5zyl to the 800hp region and he's done all in his garden.

The late, great Ken Block had many Audi's. They worked with him to make many of his successful cars at Pikes Peak , rally and gymkhana cars. You should check them out.

The 44 is the Audi 200 Trans AM the 4 is the Audi 90 IMSA GTO. I'm lucky to say that I've heard and seen all these Audi drive. Sooo good The IMSA burned a hay bale in a hair pin with the huge side pipe exhaust flames at the event where I saw it drive.

Great video keep up the good work,have you seen f1 with Jenson button where he comes from behind Inthe 2011 Canadian grand Prix really great.

The chirping sound comes from turbine stutter on throttle shutting (pressure peak ramming back through the intake) because afaik they didn't use blow off valves for some reason. Iconic sound - hard on the turbo - but I think the whole thing got changed/reworked rather frequently anyway

There should be a documentary how Audi Quattro changed motor racing and there's a documentary how easily this car dominated USA racing series and got straight up banned.

If you want to learn more about the imsa gto, there is a video on yt called „secrets of speed - unfair advantage“. Highly recommend it.

There is a documentary about those cars called the unfair advantage they wanted to ban those cars because of the Quattro system matched with their turbos they could accelerate mid corner to jump the corners.

The stock RS3 is 400hp and is no slouch. 2023 models are gonna have an alloy block that shaves off almost 50 lbs. Wait until the new Golf R makes its debut.

You need to watch 'Goodwood festival of speed'

The IMSA GTO. One of my all time favorite cars.

Typ44 are the tran am series audi 200s, the imsa gtos are audi 90s, the audi v8 was a 3.6l v8 dtm based off the audi 200v8

If you like fast sedans or saloons, u might want to Google footage of the Lotus Omega/Carlton. Another fast classic. Only car enthusiasts will recognize it and it's one of the most ultimate standard "Sleeper" cars.

1-2-4-5-3 💪🏼

Yes, you are right. #4 is the Imsa car, and #44 Trans am. The Imsa car is one if my favourite of all time. I Saw the real one from Stuck in a Museum here in Germany. Just goosebumps all-over!!!! 😍😍😍

1:27 Those wheels are designed to maximise brake cooling. The vents around the edge cause the wheels to suck in air as it rotates, which is then blown over the brakes.

For me as a german it's very funny that the Audi 200 was named "5000" in the US. When I saw one the first time I thought: "that's a lot" 😁

IMSA GTO was the top level touring class for American racing until the mid 90's where the cars were tube framed monsters that had to be powered by production based engines from the manufacturers. They had large wings whereas Trans-am had NASCAR style spoilers at the time. This meant you had lightweight machines upwards of 700 hp from numerous manufacturers competing. Some of the most dominant ones being the audi 90 and the nissan 300zx both of which had rules introduced to neuter their speeds.

You should react group 5 race cars. If you love group b you gonna love them. My favorite ones!

The first one was the #4 Audi 90 IMSA GTO, the #44 was the Audi 200 TRANS-AM! The Audi V8 DTM is n/a high revving V8 engine, the others were 5 cyl Turbo!😎👌

Hi there Gearheads. Volvo 850 and Fiat Marea: 5 cylinder sounds also in the British Touring Car mid 90s

you said in the beginning it looks like hot wheels with the rims... actually the opposite: they were designed for better cooling of the brakes :)

I think that the general lee Audi is the best sounding 20 valve ❤️💪💯

Hello I like your video. The are great to watch. There was a video where you talked about Walter Röhrl. He helped to develop the Audi imsa GTO and we was driving it. There gives some video but the are in German. He made a record with the Audi S1 at USA Pikes Peak I think 1987. For a long time he was racing and test driving for Porsche. He is still sometimes driving some rally’s at Europe. There gives videos but the are in German.

I still think the 240 Oz Datsun 240 z. Has an awesome sound. Especially for a pretty much standard L series straight six. The have a channel called Team 240z

5 Zyl englines sounds magnificent. If it were a V8, it would probably sound different than US cars, because Europeans mostly use flatplane crankshafts and US mostly crossplane, which is why they bubble so nicely. I like that yes. However, flat planes are often used in sports engines, even in the US.

The wheels are BBS turbofan wheels

Walter Rohrl had help on the development of that l5T. One of the greatest rally drivers helped Audi after Gr. B beeing banned from rallying. He also done and won pikes peak with Audi and some years latter he moved to Porsche. There's a documentary about the introduction of Audi on IMSA somewhere. Maybe on KZfaq u find it. The 90 Quattro was the model to promote at that time.

Pffff that one was a freakin behemot 🤯🤯🤯😱👌🏻👌🏻

You should react to some onboards of jozef beres, he drives an audi quattro s1 e2

Pretty funny, there's the Judd v8 DTM Mercedes-Benz 190E which actually sounds nice also 😁

Hello, i was expecting you to see a video with the imsa, they ran in the States and they rule, even when they restricted the turbos. Love your channel, hi five from Portugal.

You should look up Group 5 silhuette racing, similar but from the late 70s and early 80s.

At 2:00 that's a audi 90 v8 driving in front of the Imsa Gto.

Front one is an audi 200 turbo and the second an audi 90!both are 5 zylinders

...please look at those 2.4 JTDm 5 potters, they do sound amazing, since you already like 5 potters :) The 44 is Audi Quattro 5000 Trans Am as it was known in US... or Audi Quattro 200...

You should check out the sound of the mk1 Capri RS 3100. Love your channel. From Ian watching in England .

Had to go a check out the 1988 Trans-am street circuit race at Niagara falls NY, awesome stuff from BITD 👍

You have see the AMG at Nordschleife.Look "DPCcars" the EVO Porsche Brake the record.🤯🤯. greetings from Germany 😁😁😜

AUDI V8 DTM-Cars have Flatplane-V8, but AUDI never make any Flatplane-V8 for the road. I love Floatplane V8-Sound.

You should check out Sabine Schmitz on the Nurburgring "BMW unscripted" to get a background view of her and then "On Board Porsche 911 GT3 R" to see what a badass she was.

When Audi went to race at imsa and DTM, they were laughed at until Audi won, then they said they were cheating because it was impossible to come into a race Serie and win from the start, but Audi did there home work and found out what they could and not do, plus they had great drivers like Hans Jochen Stuck and Walter Röhrl the Rally World champion, they were so good they changed the rules and Audi said kiss my ass bye, the same happend when Porsche won everything in the late 60s and 70's they changed the rules then too, the other race teams in the DTM started crying but they could not do much because the Audi was heavy compaired to there race cars like MERCEDES and BMW even OPEL who all used two door and rear wheel drive cars, Audi had four doors and four wheel drive and a lot less Aerodynamik as the others but still won, FOUR WHEEL DRIVE baby was the answer, they changed the rules so many times it became stupid, sorry forgot ALFA 147, yes it's always because they changed the rules it became too exspensive and ALFA and OPEL could not aford to race, then the DTM was gone for a long time until the 2000s when she came back with new rules so every car had the same Aerodynamiks and Power output, not bad but I lost my intrest in the race Serie, the Comeback was not as good as the original for me.

Cars with a 2.2 turbo engine are written in gold letters in the history of automotive...

Hi have a listen to South African 1994 West Bank Modified Saloons It Has Audi 5 Mazda with Rotary (Sounds Like F1 Car) Bmw Nissan Opel Golfs Fords This was pure music on the Race track diffrent engines all in one Race. Take a Listen Keep up the good work you do ion the Channel

i remember the trans am series banning all wheel drive cause Audi dominated they didn't care that the muscle cars were 200 - 300 bhp more than audi they claimed Audi`s quarto system was to much of an advantage.

This car is literally a Group B Audi rebuilt for circuit racing

The Imsa GTO were made from the base of a Audi 90 quattro.

Another wonderful sounding inline 5 is the Volvo 850 T5R. A station wagon shaped like a brick that would leave BMW's at the traffic lights and give Porsche 911's a seriously hard time. A large 4 door family car that does 0 to 60 in 6.6 seconds, it will hit 155mph and that's the stock factory setup! these are easily tuned making them even faster!! So good the UK police used them as motorway pursuit cars. That's quicker than a 1996 Mustang GT!!!

You should listen BMW and Lancia Delta HF integral during moutain hill race.

You have to hear the BMW M1 Procar. Nothing is better imho.

Audi 200 I owned a Audi RS2 Avant. What a beast that was

the imsa gto is a tube frame race car ,the trans am and the dtm car are modded street cars

I am new to this channel, but I have reliazed that you like Austria so you might also like one of the best Offroadvihcles of all time, the Puch Pinzgauer, which was built by Styer Daimler Puch in Styer Upper Austria. I also noticed you like rallying, so I thougt you would also be interessted into the legend the myth the one and only goat Walther Röhrl himself, who destroyed all times at Pikes Peak at the time and won many rallys with ease.

You have to look up JP Performance... the Hoonigan guys gave him already a visit

stu stu's before VW/Audi implemented Diverter Valves. the only I5 still running is the RS3's only come in a 4dr Hatch or Sedan. there is the TTRS but they were 2009-2014, the RS3 replaced it never to be in a Coupe or 2dr again as the R8 v8/v10 replaced that style.

Was dich so entzücken lässt ist das Bypassventil.

It has 4 doors. So it is technically a family car. With which you can go very very fast to the supermarket and back.

You will love the short 20 mins Audi Trans-Am and IMSA related American docu "Secrets Of Speed: Unfair Advantage" on KZfaq!

Porsche 935K also run in IMSA