Hybrid K04 Turbo Discussion

[YerMother]

Wish i could log mine for you as a comparison!

 

[Wilko]

Wilko on Scotty's logs above, the actual is always falling below the requested so there's no point asking for more from the requested if actual cant meet it otherwise you'll hit limp.

On my logs a couple of posts above, the requested does fall below the actual so yes that needs tweaking as IMO requested should always be above actual to max the turbo out!

Have you had a falling out with JBS? (Your location info)

Something to do with the VF34/20 by any chance?

Scotty's logs, requested is matching actual fairly closely, with it falling just below it across the range. It suggests that there is possibly more in the turbo.
Actual should follow requested untill the wastegate is shut, at which point it will actual wil drop below actual. After that point, you shoult see airflow stay constant.

How accurately actual follows requested lower in the rev range is a function of actual load, gain, and damping, along with the electro mechanical bits.

 

[Mitchy]

Wish i could log mine for you as a comparison!

Dont think im too far away from you, you can use my vagcom if you want

 

[ibizacupra]

are you sure you want to run the turbo at its max possible delivery?

 

[bentaw]

ignore those readings of mine they were a result of a split hose i pulled 209 today on my way down to JKM for my latest rolling road result, my MAF is not descaled just descreened

 

[Mitchy]

True Bill, but if the manufacturer says its capable of 1.4-1.5bar at red line, i dont think us asking/wanting 1.3 bar from it is maxxing it out. Hybrids supposedly built stronger than standard tubby's also

I would be happy if it never dropped below 1.3 bar upto the red line, but very doubtful its ever going to do that. Jabba and CC have told me the exact same thing. Manifold might help things a little, but cant justify costs for so little gains.

With nitrous activated, along with giving me more power, turbo is delivering 0.1-0.2 bar extra aswell throughout but i would like it to do it with no gas involved.

Oh well, live and learn i suppose

Bill, i believe JBS are soon going to smash your 1.9t bhp record

 

[Mitchy]

ignore those readings of mine they were a result of a split hose i pulled 209 today on my way down to JKM for my latest rolling road result, my MAF is not descaled just descreened

De-screening will give innacurate readings surely? Martins 225g/s logs before but only 265bhp as an example Im getting the same 225g/s airflow with an untouched maf but will be pretty pissed off if ive only got 265

209g/s seems far more reasonable for normal k04. Supposedly supposed to max out at 210, although ive seen them go a little higher

You got any other requested vs actual logging Ben?

 

[bentaw]

Martin has the laptop at the mo mate so i havnt got any req vs act to show you i have a normal MAF on there now

 

[ibizacupra]

Bill, i believe JBS are soon going to smash your 1.9t bhp record

probably with that GT35 monstor...
point of futility tho with it being fwd as we both know traction is limited on mine.

I am intrigued to see how smallport and stock t'body cope with the expectations.. I know we had a debate about it, lol

 

[Mitchy]

What was your latest RR result Ben? You still having problems or have you sussed it out yet?Is it in your sig? 301lbft is good, but the 242? About 25-30 down on what it should be?


Is the GT35 laggy Bill? I think thats why they've chucked 100 nitrous in there also, better spool.

Yes traction is going to be a major issue for them, just like it is for you i suppose.

Although yours 527bhp? Is going to take some beating. Doubtful without nitrous i think!

I'm sure their rollers ''only'' read to 600bhp and i believe they had problems strapping yours down, so they will have the same problems with strapping down theirs

 

[bentaw]

yeah it was due to heat soak Mitch i have a neuspeed powerflow indction kit on without the heat shield and each time they ran it the horsepower went up then they opened the bonet and got that so gonna get a decent induction kit that is protected on there or go back to standard airbox with performance filter

 

[Feel]

Like ben said, he had a split pipe at the time I think (or something wrong, anyway).

Isn't Scotty still running Stock Revo on B6?

I'll chuck your's into that graph of mine in a bit.

How long did they take to map it?

 

[Mitchy]

Like ben said, he had a split pipe at the time I think (or something wrong, anyway).

Isn't Scotty still running Stock Revo on B6?

I'll chuck your's into that graph of mine in a bit.

I would have expected actual to be a lot lower if it had a boost leak, it over produces at 3960 for instance and requested at 5200 is a bit optimistic. A k04 is never going to flow 1.45bar after 5000rpm.

0.99bar or 14psi at red line if memory serves me right is about right

3320 191.7 2550 2370 =1.37bar
3960 191.7 2300 2490 =1.49bar
4680 191.7 2520 2350 =1.35bar
5200 191.7 2450 2180 =1.18bar
5680 189.5 2340 2080 =1.08bar
6040 186.5 2250 1990 =0.99bar
6400 168.4 2210 1990 =0.99bar

Yes Scotty is still running standard revo software but IMO its doubtful a remap will give a lot more. The turbo is boosting similarly to standard K04 that the requested values dont really need changing. Fuelling needs slightly adjusted as to not run lean but this doesn't even reuire the 4 bar FPR so its very minimal adjusting of fuelling!

 

[YerMother]

Dont think im too far away from you, you can use my vagcom if you want

Might be an idea!!

 

[Feel]

B6&B9 are from the same logs as that other thread, just added yours and scotty's data from this thread. Whether Ben's was a boost leak (his prognosis) or not, it wasn't running right.

I'd think about getting the boost turned up

 

[Mitchy]

Interesting when you see it in a graph Phil, cheers

I would like to up the boost a bit but dont know whether CC software can do it or not? I dont think you can go above 100% boost on their software like the APR software allows.

Its still needing tweaking a little i think and im sure next time round at CC they can up it a little more.

Still cant see it doing the boost figures we once thought it would do though

 

[Feel]

Looking at them on a graph always helps me! Mind you, made me realise that those grpahs are against mine, Revo Stage 1.

Surely CC can do something for you, they are the "best mappers in the country" after all

Thing to do, is to convince Scotty to run his at Boost 9 for a few logs - on stage 1 it's requesting over 1.4 bar. As long as he doesn't have some other issue

 

[bentaw]

so none of these tubbies have been rolling roaded yet then, would be interesting to see how both of you get on with regards to a generic map and a custom map. Is scotty having the same problems as you then mitch

 

[Mitchy]

Looking at the plots feel has done above, i am boosting better than scotty, and that will be down to the reason i have been mapped on this turbo and he hasn't.

I dont think there are any problems, i just dont think turbo is capable of what Jacob said it was.
Not to say that the power isn't there as imo there is a noticable difference over the standard turbo, its just the boost isn't as strong as what i was expecting.

I have a surging N75 just now (part throttle, full boost) so that needs replacing but i have a good reading maf and i dont have any boost leaks. I just think turbo is flowing at its near optimum with not a lot left to give.

All im saying is that in no way will it do 1.4bar at red line, like Jacob said it would. That is my only complaint, along with the spike (which isn't in my log above) but on full throtle at 3000rpm ish, im spiking at 1.7-1.8bar.

CC haven't finished with it yet, and some more tweaking is to be done

 

[bentaw]

so what sort of power and torque do you think its at