My Dyno session

[SLC Detailing]

What do u think of the graph then Mihnea?

[S2tuner]

It looks good and power is good Steve

[SLC Detailing]

is that about the limit on the k03 sensibly?

[s4woody]

i think he was being ironicly funny..im sure he,s very happy with his map and tuner like i was..

[stimp]

No biiterness from me , been chuffed to bits with my car all round. Mines a budget motor used almost every day, I've spent less than £400 on remap, brakes and suspension and it's perfect for me. Useable car 26-30mpg and a Maf reading of 274 last time I checked. Had limp mode 3 times in 2 years(the car, never me, even got twins to prove..). Completely disloyal and unbiased(tuner wise) too so just as likely to use MRC,AMD,DNA or whoever seemed most knowledgeable. The chap I used for the remap was superb and it's ran faultlessly. Much against my belief I don't feel inclined to tinker further but am always interested in the guys who are seriously investing into what is a great car.
Tinkering, I'm off to the garage to decide which of my nine exhaust collection I should run on the motorcrosser this weekend, midrange or screamer....hmmmmmm

[Dippy]

@stimp: why sound so bitter? If you had ever looked at an S4 turbocharger compressor map, then maybe you'd understand what I mean with "suicidal" and 20 psi... if you're happy with your remap, then just be happy with it and trust your tuner.

Mihnea,

As another member with suicidal boost (but the f***ers still refuse to die!) can I challenge your point (that's not "challenge" as in contradict, rather just a genuine "out of interest" challenge)?

Surely the K03 compressor map applies to one turbocharge acting alone? In the S4 with the twin K03's, the peak pressure (especially at the point of throttle butterfly closing and DVs starting to open) must be able to rise to a higher level than would indeed be considered 'safe' if a single K03 were being used. Also doesn't the impact of an inflexible TBB (e.g. APR bipipe) have an impact of giving a higher peak boost reading.

Or presumably you already considered all this?

My car is definitely capable of reaching a 1.35 - 1.4 bar peak boost, but I really do have to try hard to make it do that. Most of the time when I'm accelerating hard without caring what the peak boost is, I later check the reading and find that the peak was only around 1.2 bar.

[GrahamS4]

Interesting discussion.

Mihnea assuming a car mapped by you had say 320BHP running a peak boost of 17psi, just in theory to put this into some perspective, what sort of power would you estimate for the car at 20psi?

Is it as simple as that or would you have to wind back other parameters to cater for the extra boost perhaps cancelling out the gain? (as you can tell I clearly have no idea!).

[MarkB]

Interesting discussion.

Mihnea assuming a car mapped by you had say 320BHP running a peak boost of 17psi, just in theory to put this into some perspective, what sort of power would you estimate for the car at 20psi?

Is it as simple as that or would you have to wind back other parameters to cater for the extra boost perhaps cancelling out the gain? (as you can tell I clearly have no idea!).

Thats my take on what happens, because of the higher boost, thus more heat the timing gets pulled back. Running less boost with good solid timing can give better or at least the same results