Hybrid K04 Turbo Discussion

[J@mes]

I have just bought some Yokahma Prada Spec 2s for the fronts! Feck me they grip in the dry especially when it was warm the other week! W@nk in the wet though!

Thats wat I have on my fronts, yes in the dry they grip VERY well!

but in the wet they are utter crap... tho what do you expect from a summer tyre?!

Mike at jabba p*ssed himself laughing when he drove my car and found that i was spinning up in 3rd/4th in the wet! (I did warn him about the tyres before he floored it!)

 

[wild willy]

Coilovers, dog bone mount and GOOD tyres make getting the power down much much better!

I was very surprised at just how much coilovers make getting the power down easier!

All three above mods make the car much more drivable imo!

Coilovers do you think these may be as good as a diff. I'm not sure i want to go any lower thou.

 

[wild willy]

Just for a guide, I'm now running at 108% on V-tune Now holds 1.5bar to nearly 5.5k now. Still just over 1.2 bar @ the redline. Need to do more logs though as i have no idea of what is being requested!

Thats a wicked amount of boost. i think i'll give it 100 miles and then i'll give it 105% Vtune and start logging. It would be good if the four LCR hybrid guys could meet at a RR this year and compare performance. Different maps, Intercoolers etc should make for interesting results.

 

[J@mes]

Coilovers do you think these may be as good as a diff. I'm not sure i want to go any lower thou.

ask sie as his LCR is lowered and he has the diff!


but imho I would lower a LCR everytime! mines lowered about 35mm

 

[YerMother]

Thats a wicked amount of boost. i think i'll give it 100 miles and then i'll give it 105% Vtune and start logging. It would be good if the four LCR hybrid guys could meet at a RR this year and compare performance. Different maps, Intercoolers etc should make for interesting results.

Any logs yet mate?

 

[wild willy]

I've done a few with Vtune at 105% boost but to be honest i'm not reaching the same levels of boost as my standard tubby. I'll have to tighten my actuator a few turns and see how i get off.

 

[YerMother]

Probably like Mitchy, once you tighten the preload a bit, you should see improvements!

 

[wild willy]

Probably like Mitchy, once you tighten the preload a bit, you should see improvements!

How much did you have to tighten yours to go from 1.1 to 1.2 bar after JBS altered it to standard k04 settings.

 

[wild willy]

I've tightened the actuator 3mm with no real increase in high rev boost retention.

 

[Mitchy]

That's got to be down to the mapping then mate. It should make a difference if requested is asking for it

 

[wild willy]

That's got to be down to the mapping then mate. It should make a difference if requested is asking for it

4000 130.1 2490 1680
4160 163.9 2550 2150
4360 191.7 2550 2450
4520 191.7 2550 2510
4760 191.7 2530 2440
4920 191.7 2510 2370
5120 191.7 2460 2290
5280 191.7 2430 2220
5440 185 2390 2230
5640 182.7 2350 2180
5760 172.2 2320 2150
5960 171.4 2280 2120
6120 170.7 2260 2120
6240 168.4 2240 2070
6320 133.8 1010 1840

Probably a 3rd gear pull but 1.07 bar at the red line is poor. Tweaking the actuator 3mm has made no difference. The map is requesting the goods though. my stock k04 has made 1.15 bar at red line.

 

[Feel]

What's 118 like (n75 duty)

 

[wild willy]

5200 33 76.9 2110 1.11
5400 34 82.7 2190 1.19
5560 36 92.5 2200 1.2
5760 36 91.4 2150 1.15
5880 37 94.9 2110 1.11
6040 39 90.6 2050 1.05
6200 39 95.3 2050 1.05
6320 39 89.4 2080 1.08

The duty cycle seems high to me (these measurements were b4 i adjusted the actuator. If i lengthen the actuator rod i will effectively open the waste gate a little and will be permanently loosing boost, by me tigtening 3mm i was hoping that boost will build up a little more before opening.
I'm sure i have a wastegate issue. its either vac hoses, n75 valve or more shortening of the actuator rod is required. I have a spare n75j valve somewhere so i'll try that and see if my duty cyle reduces or boost increases.
Scotty B is seeing 1.4 bar at red line, Sie is 1.5bar @ 5000rpm, Mitchy is 1.2 bar @red line and i'm about 1.07bar.
Ah the joys of fettling with me motor.
Maybe 3mm was alittle ambitious and i've past the golden measurement.

 

[Mitchy]

Carl, i have 1.5bar at 5000rpm and then it starts dropping sharply from there. You seem to only have 1.37bar at same (ish) rpm. I believe Sie and Scotty are also seeing similar 1.5bar figures at 5000rpm.

Ive not done logging for a while but from memory, i have 1.22bar at 6650rpm. It was about 1.1 bar before actuator tweaking!

Like i suggested in my msg...

ECU reset and TB allignment per 1mm adjustment. Drive 50miles hard and relog! No increase, adjust further and repeat ecu reset etc. Im happy with my 19.5mm setting!!

If not that, may just be down to the time of year.
Then there are mod issues...Uprated TIP/FMIC/Charge Pipe/Top Hosing/Yellow Spring, what kind of filter are you running? Charge pipe mod seems to make a little difference, along with FMIC especially at this time of year.

Not sure if your running any of the above and may be reason why your not seeing same results?

Has turbo been run in? Bearings etc may still be tight.

Have you got the big 1.8bar (on gauge) spike at around 3200rpm and then stays above 2540mbar to about 4500rpm?

 

[wild willy]

Carl, i have 1.5bar at 5000rpm and then it starts dropping sharply from there. You seem to only have 1.37bar at same (ish) rpm. I believe Sie and Scotty are also seeing similar 1.5bar figures at 5000rpm.

Ive not done logging for a while but from memory, i have 1.22bar at 6650rpm. It was about 1.1 bar before actuator tweaking!

Like i suggested in my msg...

ECU reset and TB allignment per 1mm adjustment. Drive 50miles hard and relog! No increase, adjust further and repeat ecu reset etc. Im happy with my 19.5mm setting!!

If not that, may just be down to the time of year.
Then there are mod issues...Uprated TIP/FMIC/Charge Pipe/Top Hosing/Yellow Spring, what kind of filter are you running? Charge pipe mod seems to make a little difference, along with FMIC especially at this time of year.


Not sure if your running any of the above and may be reason why your not seeing same results?

Has turbo been run in? Bearings etc may still be tight.

Have you got the big 1.8bar (on gauge) spike at around 3200rpm and then stays above 2540mbar to about 4500rpm?

The DV is alot more audiable with this turbo.
I'm not seeing major spiking issues yet.
I'll try a throttle body realignment soon and see if it sorts it.
There seems to be more preload length on my stock k04-23 turbo which may explain why Sie's was strong out of the box. I must still need a mm or two. The thing is that actuator tweaking is a sure way of creating spikes. Its a bit poor Jaccob didn't set the actuators properly on a bench test.
I'm running the stock air filter (as this out flows my dynatwist and panel filter).
a Forge Tip, Stock charge pipe, stock n75 F valve and stock intercooler. (PA at the ready when boost issue is sorted). Yellow spring in DV.
Don't get me wrong it pulls well. I just wanted the figs to back it up.

 

[YerMother]

F valve is the standard N75 mate! You should be seeing higher duty cycle if its not meeting requested.

You certain you have no leaks!?

I couldn't tell you how much i've adjust the pre-load. Just made sure that i could still open it with my hand and that there was still enough movement to keep it drivable as i over tightened it once and it was not drivable just surged badly.

I just adjusted and observed.

It confuses me why the ECU is not increasing the wastegate duty when it's not meeting requested! Could be the J valve! Or were those logs of the 118 from standard Vtune settings as that would make sense!

 

[wild willy]

F valve is the standard N75 mate! You should be seeing higher duty cycle if its not meeting requested.

You certain you have no leaks!?

I couldn't tell you how much i've adjust the pre-load. Just made sure that i could still open it with my hand and that there was still enough movement to keep it drivable as i over tightened it once and it was not drivable just surged badly.

I just adjusted and observed.

It confuses me why the ECU is not increasing the wastegate duty when it's not meeting requested! Could be the J valve! Or were those logs of the 118 from standard Vtune settings as that would make sense!

Sorry mate a typo error, I run the stock F but may try a J for reference. From memory the 118 log is standard vtune (100%) Boost request. Even in standard stage 2 settings it struggles to make requested.
Opening the wastegate by hand is no easy task when its in position. the spring is quite strong.

 

[YerMother]

It's all in the wrist action!

You can do it! Obviously your not having your 3 shredded wheat in the mornings!

If that is from the standard setttings then its making a difference as you have:

6040 39 90.6 2050 1.05 (1.05 bar @6k standard settings) and,

6120 170.7 2260 2120 (1.12 bar @6.1k) just keep slowly tightening untill your seeing the 1.2 bar at 6.5k as requested!

 

[wild willy]

It's all in the wrist action!

You can do it! Obviously your not having your 3 shredded wheat in the mornings!

If that is from the standard setttings then its making a difference as you have:

6040 39 90.6 2050 1.05 (1.05 bar @6k standard settings) and,

6120 170.7 2260 2120 (1.12 bar @6.1k) just keep slowly tightening untill your seeing the 1.2 bar at 6.5k as requested!

The problem with my hands is all the hair on them and my failing eye sight.

 

[Feel]

The problem with my hands is all the hair on them and my failing eye sight.

Bare palms, and the backs still hairy, then