Tuning, Dynos, Power Figures Moans etc....

[Ryan_s3]

apy definetly has vvt(it's in my 1999 audi brochure) but i think it must be mechanical version as you say.
Anyway mihnea,you shouldn't have any turbo efficiency problems with my turbo!!!

[S2tuner]

apy definetly has vvt(it's in my 1999 audi brochure) but i think it must be mechanical version as you say.

Will check some more on ETKA and find out the exact difference with the AMK...

Anyway mihnea,you shouldn't have any turbo efficiency problems with my turbo!!!

Lol, hopefully not, definitely looking forward to it anyway

Cheers,

mihnea

[audiboy]

Heres something to think about. Just becasue a company has a large advertising campaign or have been around for years, does that make them any good?? Or does it just mean that they know how to bullshit ppl!

[DavidR]

As to if there would be a benefit from running one of my maps, I don't know actually... you might be disappointed as you might be very happy...
Either way, that map will have to be a custom map anyway....

I would be very interested if you could map my car to produce similar figures but with added longevity. However, it doesn't make sense to me. I ran my car at 1.5bar peak at the lastest RR and produced 258bhp and 280lbft. It would seem clear that torque certainly is closely related to boost, whereas power is a product of heatsoak vs compressor efficiency.

The car does make more power and more torque at silly high boost though.

I don't run the car in this boost profile all the time, as clearly it is asking for a turbo / manifold replacement sooner or later.

Again, realistically what are the chances of acheiving reasonable power figures (i would be aiming for 270bhp and 290lbft) without flogging the turbo to death using your custom remap?

BTW the noise that it makes is similar to OEM, but more pronounced. The rigid turbo to i/c pipe is noiser on my car than most...

Thanks again,

David.

[Prawn]

Maybe I am missing something here but it seems the two Star plots on this thread show very low speeds for maximum speed attained during the run, 85MPH for the one above and 121MPH (if I remember correctly) for Barry's.
This suggests the plots were taken in 3rd gear, I always understood that doing this showed more power (artificially ??) and that all plots should be run in 4th gear.

Any thoughts ?

[wazza]

121mph in third? You've got to be joking.

[Prawn]

Alright 4th then, point is they are not taken in top gear which I though was usual.
For example on all my plots the max speed attained is 253kmh (about 160mph),
ie a gear up on 121mph ?

[wazza]

I thought it was always best in the gear where the drive ratio was most even - probably fifth on our cars.

[DavidR]

It's usually 4th gear which is closest to a 1:1 drive ratio on the S3

Certainly on the S3 4th would produce about 85mph at 5000rpm.

On an A3 1.8T 3rd would be equivalent

If I remember, the S4 would do 120+ in 4th....

[Dippy]

the whistling is called "compressor surge", which physically means that the turbo is trying to fill the engine with air that the engine can't breathe. Very bad in terms of efficiency and it DOES put a lot of stress on the turbo.

I remember when I worked in the oil/gas industry we used to spend a lot of effort and money on anti-surge controllers under the assumption that surging was very bad for the compressors.

Still - the compressors we were concerned about cost hundreds of thousands of dollars. The ones being discussed in this thread are cheap by comparison. Surge away!

[Doug_S2]

Barry - Glad to see you are eventually happy with your car - I'll hopefully see it soon.

David - Was your car really putting out 332lb/ft torque with an ambient temperature of 40 deg C? Your graph only shows 50 bhp for losses as well.

I thought the Maha uses a correction factor for ambient temperatures, so if that is not right it will screw up the figures. It would be real nice if the intake temperatures were plotted on the graphs. As seen at a recent RR, intake temps on the cars with gauges connected were getting to silly levels.

[DavidR]

AFAIK the intake temperature affects the corrected power figure, but not the wheel power figure of torque figure. I'm led to beleive the rolling road measures the torque regardless of external parameters.

50bhp wheel loss seems about average for the runs on my S3. I got 2 runs at the RR you arranged, one with 66bhp wheel loss, the other with 55bhp...

Saying that, I also have a completely nonsense dyno plot showing 290bhp...

Who knows?

[VERN]

[quote="S2tuner"]hi David,



Regarding the Leon Cupra's, I have no clue. Interestingly a Leon Cupra R 210HP with a stock 225 chip in the ECU would only make 225HP/280Nm (factory rated figures for the BAM engine), whereas the BAM with its original chip will make 240-243HP/ and always 310Nm of torque. I have checked ETKA for hours for differences between AMK and BAM engines, there is NONE. The only difference that there is on a Cupra R AMK and a Cupra R BAM is the exhaust and cats, but the Cupra R I'm talking about (it did 214HP/270Nm on its stock chip) had a Seat Sport WRC or something complete exhaust system, with a race cat and no mufflers....


So why they make so different power, I don't know. It all comes down to what I've said again, every engine is different and every engine requires specific tuning. For me, as a perfectionist, at least it does.


HTH,


Mihnea




mihnea

i am pretty sure that the amk 210 and bam 225 have differences

bam has smaller and weaker conrods does on TT anyhow

225 bam has a different wastegate actuator attached to k04,vvt is emmissions anyhow

vern

[Ryan_s3]

hi vern ,nice to see a familiar face.I heard that the apy,maybe amk have a slightly larger port head than the bam which is smaller to encourage more torque?

[VERN]

hi vern ,nice to see a familiar face.I heard that the apy,maybe amk have a slightly larger port head than the bam which is smaller to encourage more torque?

just think the large port head was on AGU golfs mate,throttle cable too dunno about apy though ryan??/ not on amk for sure,apparentley very good mod foe high spec motors

vern