@QFizzV8Fizz first of all there is no such thing like "blow off valve" in audi´s 5-cyl engines. You propably ment by-pass valve. Secondly, those S1´s didn´t have blow offs or by-passes at all.
@QFizzV8Fizz Sorry if I made myself rude. Yeah, BOVs makes similar sound but in this (same engine in 90tq IMSA GTO) sound comes from air pressure goes back to turbine when throttle flap in manifold is closed = air surge makses turbine to reduce rotation speed (turbo is spinning at 150-200krpm). The BOV prevents this and lets air out from system (by-pass valve circulates it back to the turbine´s compressor wheel) rally cars rarely have bo valves to reduse risk of malfunction.Excuse my english.
@Quattroowner : It gets forced out through the turbo since it has nowhere else to go - thus violently slowing it down (the turbine that is) while making that awesome NNNGHPFCOCOcocococo sound when you let of the gas. Running without BOV has its advantages, dependability not being one of them.
@kondemnert You know that audi used am "Umluftsystem" or closede Blowoff where the compressed air from the turbo was detured to the intake of the Turbo to prevent it from slowing down ???
@bentleyv8t this should be Nr. 12 of 20 - Chassis-Nr. 85ZGA905012 - never used in group B times for a rallye but driven in 1990 ROC - Plates: NZO 620 (S)
the car is not owned by Dahlbäck,its owned by the man who runs the gatebil,the only thing Dahlbäck as done to the car was to put a new turbo and map the ecu because the car is from 86 or something,so its a pretty old computer setup on it!..watch gatebilfilmen 03..he says it himself!..but what a classic car;)
Not s1, Replica!
ivojiggy 4 days ago
dont rape the good old car pl0x
dennelke1414 1 month ago
you can tell it wants to rally!
oO0Briggs0Oo 1 month ago
Where ever Dahlbäck is, there is one crazy audi!
MuscleCarFreak1994 1 year ago
whats the chirping? fast compressor surge?
454sskilla 1 year ago
@454sskilla BOV (Blow off valve"
QFizzV8Fizz 1 year ago
@QFizzV8Fizz first of all there is no such thing like "blow off valve" in audi´s 5-cyl engines. You propably ment by-pass valve. Secondly, those S1´s didn´t have blow offs or by-passes at all.
thenxs 1 year ago
@thenxs Then what makes that sound?, only BOVs do, atleast from what i've heard, but go ahead and correct me if you think you're smarter than me.
(P.S, i'm not being offensive)
QFizzV8Fizz 1 year ago
@QFizzV8Fizz Sorry if I made myself rude. Yeah, BOVs makes similar sound but in this (same engine in 90tq IMSA GTO) sound comes from air pressure goes back to turbine when throttle flap in manifold is closed = air surge makses turbine to reduce rotation speed (turbo is spinning at 150-200krpm). The BOV prevents this and lets air out from system (by-pass valve circulates it back to the turbine´s compressor wheel) rally cars rarely have bo valves to reduse risk of malfunction.Excuse my english.
thenxs 1 year ago
@thenxs Ok, thanks for letting me know! :)
QFizzV8Fizz 1 year ago
@thenxs Ok , tell me where did the compressed air from the turbo goes after the throttle valve is closed ( for example at the moment you shift ) ???
Quattroowner 1 year ago
@Quattroowner : It gets forced out through the turbo since it has nowhere else to go - thus violently slowing it down (the turbine that is) while making that awesome NNNGHPFCOCOcocococo sound when you let of the gas. Running without BOV has its advantages, dependability not being one of them.
kondemnert 7 months ago
@kondemnert You know that audi used am "Umluftsystem" or closede Blowoff where the compressed air from the turbo was detured to the intake of the Turbo to prevent it from slowing down ???
Quattroowner 7 months ago
@Quattroowner : the re-circulating dump valve? Sorry, I have no idea if they used it on the original S1.
kondemnert 7 months ago
@Quattroowner Dont think they used any blow off on the real S1, but road Quattros used recirculating valves.
ringlol 3 months ago
@ringlol Recirculating valve was the word i have been searching for , and it is used in the S1 to prevent the turbo droping rev. while shifting ...
Quattroowner 3 months ago
@Quattroowner Then they used a ridicoulusly strong spring because the turbo is still fluttering = losing turbo RPM's.
ringlol 3 months ago
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@454sskilla BOV (Blow off valve)
QFizzV8Fizz 1 year ago
Abartig! :D
4B5PR1T20R 1 year ago
Hans still owns Dahlbäck Racing
Paganiproductions 2 years ago
so which rally was this Quattro used on ?
bentleyv8t 2 years ago
Gruppo B
falkracing2 2 years ago 4
@falkracing2 group b not gruppo b stupid italian
kalasnikov121 1 year ago
@bentleyv8t this should be Nr. 12 of 20 - Chassis-Nr. 85ZGA905012 - never used in group B times for a rallye but driven in 1990 ROC - Plates: NZO 620 (S)
Kurzb3 1 year ago
@Kurzb3 ableitet.no/twentyS1/twentycars.htm. This website has all the S1s whereabouts.
bentleyv8t 1 year ago
@bentleyv8t GROUP B
kalasnikov121 1 year ago
the car is not owned by Dahlbäck,its owned by the man who runs the gatebil,the only thing Dahlbäck as done to the car was to put a new turbo and map the ecu because the car is from 86 or something,so its a pretty old computer setup on it!..watch gatebilfilmen 03..he says it himself!..but what a classic car;)
suprarune 3 years ago 4
I think that i wrote somewhere that this dahlbackracing Audi S1 had 700hp,but i am not sure!!!
beautiful car
odzadze123 3 years ago