Max torque & bhp in my Audi RS4 B5 2,7ltr - VAST updated???

[Mr.RS4]

What is max torque & bhp for my car(Audi RS4 B 5, 2,7ltr)?

The problem is perhaps to mutch torque in low rpm with mutch resistance??? So how much would you recomande with torque @ 2-3000rpm?


I have VAST upgrade RS6 turbos, bigger injectors(Siemens Deka 630cc) & 255lph High Pressure Fuel pump, 4" cold air filter and Bosch to Hitachi MAF Sensor Conversions, DP, bigger exhaust, Dalbech Racing dump valve, N75 Race valve, and ECU setup to fit my hardware.

[NOTORIOUS VR]

RS4's are supposed to have stronger rods I believe... but even then I was reading posts on a UK forum that you should cap it at ~600bhp on an OE RS4 motor. No idea how accurate that is.

[Mr.RS4]

RS4's are supposed to have stronger rods I believe... but even then I was reading posts on a UK forum that you should cap it at ~600bhp on an OE RS4 motor. No idea how accurate that is.

Ok, thanks for answeer :-)

But do you meen stronger then S4 rods?

And do you have link to the forum or post that you have read from?

[Silverking]

Raymond??

Isn't 530bhp max with stock rods?
I know it is Nm that ruins rods but i don't know how much they will hold..
I am guessing that your rs4 will have around 530bhp;)

[Mr.RS4]

Raymond??

Isn't 530bhp max with stock rods?
I know it is Nm that ruins rods but i don't know how much they will hold..
I am guessing that your rs4 will have around 530bhp;)

>Raymond??
Yes, Odd Arne :-) How did you see that this was me:-)))

Yes also believe that 530 hp is max, but I have heard that you can take out up to 580bhp. I hope it is 530bhp max.
BUT I am mutch more concerned about torque, even with "only" with 530bhp my rods can break with to mutch torque and to mutch strain at same time.

[americanthunder]

im making close if not right at 600bhp on stock motor, no problems.

[Silverking]

Is it on a stock s4 or rs4?
What boost pressure are you running?
I dynoed mine the other day, and it got rs6 setup from Vast and i got 427awhp/557awnm at 1.6bar

Should it have been more maybe?

[Silverking]

Mr.rs4

1+1=2:)
Norsk, rs4, vast oppsett

[americanthunder]

mine is stock s4 motor, 26 psi tial 605's 446awhp on a mustang dyno

[Silverking]

If you have 446 awhp and 600hp at the cranck, i am guessing you are using 25% drivetrain loss
Mine was dynoed on a rototest and they said that i should use 10-15% drivetrain loss

If i am using the same % mine will be 570hp on cranck at 1.6bar

So i really don't know what would be the right % to use

But one thing is for sure, you do run a inpressiv boost pressure:) in bar's you are running 1.79

[americanthunder]

10-15% is like wishful M3 drivetrain loss. 23-25% is much more realistic for a b5 s4/rs4.

[s4nicetry]

If you have 446 awhp and 600hp at the cranck, i am guessing you are using 25% drivetrain loss
Mine was dynoed on a rototest and they said that i should use 10-15% drivetrain loss

If i am using the same % mine will be 570hp on cranck at 1.6bar

So i really don't know what would be the right % to use

But one thing is for sure, you do run a inpressiv boost pressure:) in bar's you are running 1.79

They are probably telling you to use 10-15% dtl due to their dyno. I mean there is no way your quattro only gets 10-15% losses. ~25% seems to be the typical figure used for converting.

[americanthunder]

i would think the type of dyno your using would make a difference how you figure out your crank hp. For instance on a dynojet my car might put down closer to 500awp, if you use that same 23-25% drivetrain loss that would be like saying im making 650 to the crank which obvously is not true. Kinda a gray area

[Tech/Sales@VAST]

Rod's would be impossible to gauge when they will break, I wouldn't look at dyno #ss anymore in this forum to much as the numbers have been so perverted for years now. What I would look at is performance ie trap speeds,third gear pulls and 60-130mph times and not just 1 of the 3. Most will be shock to see some of the 425whp cars out performing some of the claimed 475+whp cars, we see data day in and day out and it's pretty clear whats what.

[Mikse]

Is it on a stock s4 or rs4?
What boost pressure are you running?
I dynoed mine the other day, and it got rs6 setup from Vast and i got 427awhp/557awnm at 1.6bar

Should it have been more maybe?

I noticed you are from norway. Are you running stock exhaust manifolds or w/m? Any FATS times?

[Tech/Sales@VAST]

I noticed you are from norway. Are you running stock exhaust manifolds or w/m? Any FATS times?

Remember his FATS times will be with the RS4 tranny, you need to look at the 57-60mph to 90mph, going by the gearing in the RS4 tranny it's almost like logging your u.s car in second gear

[fdation]

Rod's would be impossible to gauge when they will break, I wouldn't look at dyno #ss anymore in this forum to much as the numbers have been so perverted for years now. What I would look at is performance ie trap speeds,third gear pulls and 60-130mph times and not just 1 of the 3. Most will be shock to see some of the 425whp cars out performing some of the claimed 475+whp cars, we see data day in and day out and it's pretty clear whats what.

.thank you master yoda!

[Mikse]

Here´s few dyno sheets that show chp and whp. If you calculate the drivetrain loss its ~16-19% and those are big power cars People who claim to have 450whp with K04s may tell the truth with 16% DT loss but hell no those car have 25% loss!!



This is why I agree 10000% with shawn about how 425whp cars beat 475+whp cars etc etc. If 435whp (580chp) car run 2.5xx FATS and 460-480whp run 2,7xx something does not match.

[Tech/Sales@VAST]

Not even just going off the FATS, MPH or 60-130 times, just by looking at the fuel being used paints a pretty good picture on the truth. Never go by the dyno numbers unless everything else adds up, we've seen 550+whp cars run 116mph at the track. These times are normally achieved at well under 400whp. We've been 134+mph at 517whp in a full car

[Silverking]

I sent my dyno result to Mike and Prince today, will be interesting to hear what they think:)

Who are you tech/sales@vast ;)

I am the Norwegian one always asking questions;)

[Mr.RS4]

I sent my dyno result to Mike and Prince today, will be interesting to hear what they think:)

Who are you tech/sales@vast ;)

I am the Norwegian one always asking questions;)

ehhh, you are not alone to ask questions from Norway :-)

@Tech/Sales@VAST
Yes very interesting question **> Who are you tech/sales@vast

[Mikse]

Is it on a stock s4 or rs4?
What boost pressure are you running?
I dynoed mine the other day, and it got rs6 setup from Vast and i got 427awhp/557awnm at 1.6bar

Should it have been more maybe?

Check your PM.

[jfunkey]

Not even just going off the FATS, MPH or 60-130 times, just by looking at the fuel being used paints a pretty good picture on the truth. Never go by the dyno numbers unless everything else adds up, we've seen 550+whp cars run 116mph at the track. These times are normally achieved at well under 400whp. We've been 134+mph at 517whp in a full car

This is a very good point. I have to say with all the dyno hype its hard to nail down what these cars are really making. The fuel limmits would be a good indicatior that and the trap speeds as well

[alexverve]

Is it on a stock s4 or rs4?
What boost pressure are you running?
I dynoed mine the other day, and it got rs6 setup from Vast and i got 427awhp/557awnm at 1.6bar

Should it have been more maybe?

this is my car. stock motor, S4. RS6 from VAST. 22psi.
http://www.audizine.com/forum/showth...light=vast+rs6

[arotished]

"My" car is putting down 426rwhp and 525awnm on 1.4 bar (from 3400rpm) and RS6 hybrid turbos but this was just before the engine failed. Rebuild the motor and gearbox along with reinforcement on 1st and 2nd gear. Need to get it on a dyno and see what the numbers are now.

What A/F is recommended for these cars? 11:1?

[Mikse]

"My" car is putting down 426rwhp and 525awnm on 1.4 bar (from 3400rpm) and RS6 hybrid turbos but this was just before the engine failed. Rebuild the motor and gearbox along with reinforcement on 1st and 2nd gear. Need to get it on a dyno and see what the numbers are now.

What A/F is recommended for these cars? 11:1?

Very good numbers at that boost level! So you see 1.4bar/20psi @ 3400rpm?
Care to share what kind of setup you are running S4 or RS4, mods? By RS6 hybrids do you mean RS6 with 59mm comp. wheel and clipped turbine wheel? You can PM me if you like.

[arotished]

I will share the graph when I get the papers in house. I'm about to buy that RS4 you see :)

I dont know much about the turbos on that car, only that the definition is RS6 hybrids, the documentation will tell me more. The car was tunned by es tuning in (www.estuning.no) Norway, it's support to be the 550HP/700NM kit. But with all the question about drivetrain, I guess what the car puts on the wheel, is what matters.

[Caddy7]

I'm impressed that you are buying an RS4 in Norway!! Don't you pay a yearly environmental/goverment tax based on horsepower?

I use to live in sweden and we had a yearly auto taxation to but I hear it's really expensive for you guys... here in US it's a one time deal when you buy the car (8% here in CA). Please enlighten my fellow americans on how good we have it here :)

[Audi_S4]

Here in Belgium it's the same sh*t

All cars with over 155kw/211hp are +5000€ tax on purchase , 180hp to 211hp is 2500, 163 to 180 is 1250€ and so on.
Every year the car gets older it lowers by 10% on purchase , so if you buy a 220hp Audi A4 that is 3yrs old you still pay an extra 3500€ taxes on it, and so does EVERYONE that buys that same car again and again and again !

That's not all, Every year you pay ROAD TAXES , they are rated by HP and CC, If you drive a Vette or a Benz C63 here you are banged in the ass every year cause they are + 2800€ Road taxes EVERY damn year ! So the first purchase is 5k + 2.8k before you can even drive it on the road!

A 1998 S4 = 1398€ Tax + 618€ yearly Tax

And one Liter of Ron 98 costs 1.5€ euro here so driving high power cars costs lot's or € in friggin Europe!

[arotished]

I'm impressed that you are buying an RS4 in Norway!! Don't you pay a yearly environmental/goverment tax based on horsepower?

I use to live in sweden and we had a yearly auto taxation to but I hear it's really expensive for you guys... here in US it's a one time deal when you buy the car (8% here in CA). Please enlighten my fellow americans on how good we have it here :)

Hehe, I know Caddy7. A Audi RS4 2001 (low milage) cost me 550 000 NOK/70 000 EURO, a 2007 RS4 B7 is around 1 300 000 NOK/165 000EURO. Sweden is half the price compared to Norway.

That's just how it is in Norway, stupid coverment have tax on EVERYTING you can think of. Okey, Norway the "best" country in the world and have no loan to worrie about (unlike USA, Greece and Spain) but around 70% of our salary goes to tax in some or another way.

My yearly salary is 120 000 EURO