R-Tech Customers cars and power graph gallery

[Chris.]

I have no idea what to search for over there...never been on it until I was pointed out to the thread.

What peak power would you expect a 20vt to give at what RPM? 

[tshirt2k]

You need to do some research on the 20v characteristics. Its not about numbers, its more regarding the shape of the curves in relation to rpm etc.

[Chris.]

Theres so much that can change the line of the graphs as per RPM.  Both software and hardware.

We had some old coilpacks in it and whilst is still pulled the same bhp up top, putting a BRAND NEW GENUINE set in made a much better curve down low compared to the older ones, even without software changes. 

Look at the 2 graphs I posted, the peak boost and the 277lbft torque one.  THe peak power is 666rpm later on in the rev range running less boost than what it was with a 25psi peak/spike.  Those runs were done back to back on the dyno literally within minutes of each other. 

[Wazzzer]

The way I see it is there will always be people rightly or wrongly that will pull apart whatever you do and TBH I'm sick of it

[RTechUK]

Lets see these threads then!    Because something doesn't work well on another car, doesn't mean its going to not work well on another.

What setup were you guys using?

Who said i was doing anything? I've played with my own engine which isnt a 20v and know certain characteristics.

Use the search on there to look into the level of detail an engines characteristic can be studied. Then you will realise this philosophy can be applied to any engine configuration.

Numbers don't mean anything. But how a 20vt has peak power at 4500rpm, says something isnt quite right. Hence the comparison to diesel outputs.

Its peak power at 4500-5000rpm because the turbo wont make and more above that, if your wanting the 240+bhp peak power 6000rpm+ then the k03s is not the turbo to use. MY method of tuning small turbo is not like any other tuner, I have found the k03s sweet point and found my way to make the most from it from the way i map as mentioned a few posts above.  

Now if your saying you have not seen peak power around 4500rpm then you have never seen a k03s tuned in this manner have you?  
If the normal is to tune on CGTI is aim for peak power higher up around 6000rpm then your only ever going to get your k03s turbo to 230-235bhp max like it shows in the graph.  To get a k03s AGU to produce peak power at 7000rpm then your looking at less than 200bhp power.  (all this information can back found on the forums)

The offer to CGTI members is still on, If a car comes to me with simlar spec than Chris's I will map it for free, then you can put it on every dyno in the land and do as much logging as you want.

  It will make me look a total fool and destroy my excellent reputation from over the past 7 years if I am proven wrong and about my tuning methods, OR it will give an eye opener to CGTI members who are wanting a faster AGU K03s setup..  

I have nothing to hide or to worry about when it comes to 1.8T tuning, its all I do day in day out.

Have a word with your CGTI sponsor Bill who ran one of my spec1 Ko3s remaps with decat at over 230bhp with maf logs to back up his dyno results.

[RTechUK]

k03s spec1 mapping
AUM small port engine with air filter and turbo back exhaust system.

My stage 1 maps will run .79 lambda and a timing advance to take in to account the exhaust back pressure on cylinder 3 which is an issue when running the stock cat.   What number do you think it will get with a FMIC, lambda set to 12.4:1 and custom setting the timing on its own merits even with out adding any extra load/boost request?  It not all about the boost at the end of the day its about the FULL combination of, boost-fuel-timing-dynamic thermal efficiency-flow.






The guys build thread can be found on Audi sport along with his vdcs logs..

Now I am laying out my findings It would be nice to have some one post up to back up there claims on why it wont make 240+bhp

[golf-sib]

The curve on the 20vT engines your on about is down the the turbo, as revs increase the demand for air increases, when the turbo starts to not be able to supply the demand the curb drops. You have a choice, you can have a max bhp of around 200 where it tails up and just lightly tails off to near that bhp mark (look at remapped k03 AGU's, they follow this trend). Or you can go, lets make a big ass high and maximize all that small little turbo can give at its maximum output then tail off drastically to the 200bhp mark as it runs out off puff. These are all normal characteristics of turbo's, only way can you be able to achieve a higher bhp at the end off the rev range will be a bigger turbo as the k03 is a tiny unit and will not meet the demand off the engine at them revs.

You remember the k03s I posted up earlier in the 260 figures, that was pretty much with the wastegate forced shut, you are forcing that turbo to it's limits with a serious spike.

[RTechUK]

The curve on the 20vT engines your on about is down the the turbo, as revs increase the demand for air increases, when the turbo starts to not be able to supply the demand the curb drops. You have a choice, you can have a max bhp of around 200 where it tails up and just lightly tails off to near that bhp mark (look at remapped k03 AGU's, they follow this trend). Or you can go, lets make a big ass high and maximize all that small little turbo can give at its maximum output then tail off drastically to the 200bhp mark as it runs out off puff. These are all normal characteristics of turbo's, only way can you be able to achieve a higher bhp at the end off the rev range will be a bigger turbo as the k03 is a tiny unit and will not meet the demand off the engine at them revs.

You remember the k03s I posted up earlier in the 260 figures, that was pretty much with the wastegate forced shut, you are forcing that turbo to it's limits.

Same wave length going on here dude!! 

I am sure the next comments will be, the turbos blowing up/ not safe ect.   No reports as yet, and my development k03s was pushed flat out with a blue spring, the turbo had alread done around 155k and had no issues.   Whyt no push a stage 2 k03s as hard as a k04-023 in the midrange? check out the core specs.    Same core as my k04-001-023 which pushes 300bhp or in real world chat 13.1s 1/4 at pod, and during testing has been boosting +28psi and has been driven very hard for well over a year now.


ps
I got your text I will reply once it got charge.

[Chris.]

Heres a few figures for you.  Runs were done in 3rd gear: ~1500rpm - 7200rpm redline.  (one set of logs has a 3rd - 4th gearchange in which is shown in results.)



*obvilously the MAF needs scalling for the % increase in surface area.  (off to google i go!)

Heres the logs in excel form for people to play around with:
http://hostapix.co.uk/excel/248bhplogstrimmed.xlsx

Trimmed them down to remove rundown / time between logs.

[golf-sib]

Whats stock diameter and whats the new diameter? 2.5" to 2.75"?

Remember πr² equals area, puts the two area's over each other to work out the percentage and go from there, or let me know the MAF sizes and I'll work out the percentage increase... or in theroy it would be:

2.75/2.5 = 1.1

so you would times the cross section by 1.1...

2.5 * 1.1 = 2.75 

or 1.1 is the same as 110%, so 2.5*110% = 2.75

Also chris I got the trumpet today  Thanks a bunch!