Hybrid K04 Turbo Discussion

[wild willy]

Tonights logs, c/w PA intercooler @ 15 degrees out temp.
I think with the correct actuator setting and map 1.4 bar at red line is possible.
V tune set @ 108% boost.

Group 118

233.31 4920 26 95.3 2530
233.62 5040 26 95.3 2500
234.02 5200 26 94.5 2470
234.32 5320 26 94.5 2440
234.62 5400 27 93.7 2440
234.92 5480 27 94.5 2440
235.22 5600 27 91.8 2390
235.53 5680 27 91.8 2450
235.83 5760 28 91.8 2380
236.13 5840 29 88.6 2340
236.44 5920 29 88.6 2310
236.73 6040 29 89.8 2300
237.04 6120 30 89 2300
237.35 6160 30 89.8 2280
237.65 6240 30 90.2 2290
237.94 6320 30 91 2300

 

[DPJ]

............
I think with the correct actuator setting and map 1.4 bar at red line is possible.
..........

looking that way, Carl.

 

[YerMother]

Tonights logs, c/w PA intercooler @ 15 degrees out temp.
I think with the correct actuator setting and map 1.4 bar at red line is possible.
V tune set @ 108% boost.

Group 118

233.31 4920 26 95.3 2530
233.62 5040 26 95.3 2500
234.02 5200 26 94.5 2470
234.32 5320 26 94.5 2440
234.62 5400 27 93.7 2440
234.92 5480 27 94.5 2440
235.22 5600 27 91.8 2390
235.53 5680 27 91.8 2450
235.83 5760 28 91.8 2380
236.13 5840 29 88.6 2340
236.44 5920 29 88.6 2310
236.73 6040 29 89.8 2300
237.04 6120 30 89 2300
237.35 6160 30 89.8 2280
237.65 6240 30 90.2 2290
237.94 6320 30 91 2300

You have been tightening that actuator!

Looks good! But whats part throttle control and drivability like?

 

[Mitchy]

Funny you say that Sie as i have been having part throttle issues recently.

Not sure if its down to faulty N75 or wastegate pre load.

Part throttle and i see boostcreep to say 15 psi and then drops down to what it should be in relation to position of accelerater.

Im constantly hitting limp mode aswell which is beginning to annoy me. I think thats linked with the part throttle/boost creeping issues. Too much deviation happening in the map between act vs req.

Keep on blowing off IC pipes aswell which is another nuisance!

 

[wild willy]

You have been tightening that actuator!

Looks good! But whats part throttle control and drivability like?

Part throttle control and drivability is very good, no difference to stage 2 driveability. If i don't floor it it drives stock like. I've had to tweak the actuator about 8mm to get to where i am now.
When i revert map back to stock it follows the requested boost very well without boosting too high. Personally i think a good map and correct actuator setting is all thats needed for a smooth driving experience. my only cocncern is how long will the turbo last driving @ 1.3 or 1.4 bar red line.
It was interesting to see that when the turbo was supplied with the stock actuator positioning it would struggle to make 1.1 bar @ red line with 95% duty cycle. As the preload was increased, the boost held at the red line was increased, whilst its duty cycle decreased. It would be nice to know where the optimum actuator setting should be.

 

[wild willy]

Funny you say that Sie as i have been having part throttle issues recently.

Not sure if its down to faulty N75 or wastegate pre load.

Part throttle and i see boostcreep to say 15 psi and then drops down to what it should be in relation to position of accelerater.

Im constantly hitting limp mode aswell which is beginning to annoy me. I think thats linked with the part throttle/boost creeping issues. Too much deviation happening in the map between act vs req.

Keep on blowing off IC pipes aswell which is another nuisance!

This may sound a bit silly but i would increase preload by two complete turns and see if it improves drivability. The turbo is capable of meeting requested of an agressive map.

 

[wild willy]

looking that way, Carl.

I think i'll run out of actuator bar just to hit DPJ low boost settings.

 

[DPJ]

I think i'll run out of actuator bar just to hit DPJ low boost settings.

Bend the wastegate arm.

Seriously, you're getting there with these turbos. What g/s are you flowing now?

 

[wild willy]

Bend the wastegate arm.

Seriously, you're getting there with these turbos. What g/s are you flowing now?

I haven't logged air mass on these settings but last week running lower boost i was getting 214g/sec. But i'm not sure what sort of readings a comparative standard Revo stage 2 LCR would get this time of the year for me to compare.
I,m hoping to hit 220g/sec.

 

[YerMother]

Funny you say that Sie as i have been having part throttle issues recently.

Not sure if its down to faulty N75 or wastegate pre load.

Part throttle and i see boostcreep to say 15 psi and then drops down to what it should be in relation to position of accelerater.

Im constantly hitting limp mode aswell which is beginning to annoy me. I think thats linked with the part throttle/boost creeping issues. Too much deviation happening in the map between act vs req.

Keep on blowing off IC pipes aswell which is another nuisance!

I'm not getting any boost creep with mine has gone into limp once since i altered the actuator preset but once it adapted it has been fine! I think your problem is you can not request any more boost like carl and I can with v-tune so the adaption limit is not exceeded! I too am running 108% But still only getting 1.25 Bar @6,500 in fourth!

Carl do you have any logs of 115 all the way to 6.5/7k?

 

[YerMother]

Mitchy you using your 50 shot Nos nozzle now?

Whats happened to Scotty B hows he getting on with his and the Forge actuator, I'm considering this option, use a stiffer spring rather than what we are doing!

 

[Feel]

I think he took it off, he posted in that hesitation thread about it.

 

[Scotty_b]

I had to take my actuator off as the car was over boosting and surging. Been spot on since i put the stock version back on

 

[wild willy]

I'm not getting any boost creep with mine has gone into limp once since i altered the actuator preset but once it adapted it has been fine! I think your problem is you can not request any more boost like carl and I can with v-tune so the adaption limit is not exceeded! I too am running 108% But still only getting 1.25 Bar @6,500 in fourth!

Carl do you have any logs of 115 all the way to 6.5/7k?

RPM Requested boost @ 108% Vtune.
6000 2300
6080 2290
6160 2280
6240 2260
6320 2260
6400 2250
6480 2230
6520 2090

The above is a boost request log of the Vtune software @108% boost. The problem is that when we exceed 6000rpm the request drops from 1.3 bar down to 1.23 bar @ the red line. So i'd say that both our turbos are following requested very well.
The problem is that we can't up the requested boost at the red line without requesting unwanted boost requests elsewhere in the range.
I was hoping that an unwanted actuator would give us a degree of tunability but its disapointing that Scotty had problems.
I'll try and get some fresh logs this weekend.

 

[Mitchy]

I shall be doing some further tweaking and logging soon. Hopefully this weekend!

Yes Sie, been using the 50hp jets a while now. Runs very well

I blame a faulty N75 for my surging problems, not actuator.

Carl, what kind of measurement is your rod at?

17mm standard. (Mines at 20mm at moment) What is yours at?

 

[Feel]

RPM Requested boost @ 108% Vtune.
6000 2300
6080 2290
6160 2280
6240 2260
6320 2260
6400 2250
6480 2230
6520 2090

The above is a boost request log of the Vtune software @108% boost. The problem is that when we exceed 6000rpm the request drops from 1.3 bar down to 1.23 bar @ the red line. So i'd say that both our turbos are following requested very well.
The problem is that we can't up the requested boost at the red line without requesting unwanted boost requests elsewhere in the range.
I was hoping that an unwanted actuator would give us a degree of tunability but its disapointing that Scotty had problems.
I'll try and get some fresh logs this weekend.

It's what we always said though, custom mapping would make best use of the hybrid.

Although, the delivered boost probably naturally tapers off after 6k anyway.

Whether it'll make significant enough difference to make it worth shelling out, is anyone's guess.

I sometimes wonder what GTRS/GT28RS code would do

@Mitchy - Si said earlier think your problem is you can not request any more boost like carl and I can with v-tune . Aren't you on Custom Code now? Can't you use Custom Settings?

 

[DPJ]

.....I sometimes wonder what GTRS/GT28RS code would do .......

You mean GTRS code but run with the hybrid turbo?

 

[Feel]

Probably have to turn the requested down. How do your requested logs compare to the ones posted above?

We should end this discussion right here, nobody would actually try it...

 

[DPJ]

.......How do your requested logs compare to the ones posted above?

We should end this discussion right here, nobody would actually try it...

3200	2050
3400	2140
3600	2260
3760	2350
3960	2460
4200	2470
4400	2460
4640	2440
4840	2430
5120	2420
5320	2420
5520	2430
5720	2420
5880	2410
6080	2410
6240	2410
6360	2420
6520	2430
6640	2400
6760	2390

 

[Feel]

I can't find a 115 log from a post where the owner says they're happy, but looking at that, I recon it'll work...

Carl (or is it Karl, I'm never sure) posted a 115, and if we're only comparing requested, then it's valid? Now, call me crazy if you like , but if you want more top end, and the imolavirus will hold it hold it:

Scotty_B's got Revo, I wonder how much the upgrade to Stage 3 would cost him