Hybrid K04 Turbo Discussion

[wild willy]

Dave, i haven't forgotten about those logs, i'll do them soon.

 

[YerMother]

Point to note to you guys with your actuator preset adjusted. Mine actuator broke last night wastegate is now flapping about

WW yours will be next! You may as well weld yours shut with 1.45bar @ redline LOL

 

[wild willy]

Point to note to you guys with your actuator preset adjusted. Mine actuator broke last night wastegate is now flapping about

WW yours will be next! You may as well weld yours shut with 1.45bar @ redline LOL

Ah feck, my bottles twitching a bit now.
When you say your actuator broke last night, do you mean the rod/actuator or the connecting part on the turbo itself. if its just the actual wastegate get a forge one and just becareful of the spring you fit.
the fact that Jaccobs company exists no more does not inspire confidence.

 

[YerMother]

Ah feck, my bottles twitching a bit now.
When you say your actuator broke last night, do you mean the rod/actuator or the connecting part on the turbo itself. if its just the actual wastegate get a forge one and just becareful of the spring you fit.
the fact that Jaccobs company exists no more does not inspire confidence.

Yea the rod has become disconnected!

I noticed Jacobs website no longer exists too.

 

[DPJ]

Yea the rod has become disconnected!

I noticed Jacobs website no longer exists too.

Broken at the actuator end, Sie?

 

[YerMother]

Yes, from the chamber itself

 

[Scotty_b]

Ow jacobs site going kind of fecks up the warrantee!
Ow and a word of warning i had a forge actuator and had to take it off in the end as it was causing no end of problems as the revo software couldn’t handle it and no matter how much it was tweaked it wouldn’t work. That saying if you want one you can have mine! haha

 

[wild willy]

Ow jacobs site going kind of fecks up the warrantee!
Ow and a word of warning i had a forge actuator and had to take it off in the end as it was causing no end of problems as the revo software couldn’t handle it and no matter how much it was tweaked it wouldn’t work. That saying if you want one you can have mine! haha

I think Scotty they supplied the actuator with too strong a spring in it. If you check the forge website they supply at least 3 different strengths for different PSI for that actuator. Too high a spring would require a remap to adjust the N75 for smooth operation. I think a 7.5 psi spring would do the job. Its interesting that JBS are supplying their hybrid with a 10psi sprung actuator and will be stage 3 mapped to compliment one another. I'm sure that its down to too week an actuator setup that we are required to adjust the preload to increase boost levels which leads the n75 to lose some control of the boost pressures. The turbo can flow 1.4 bar at Redline but simply increasing requested boost doesn't achieve the desired results without fettling with the preload. I think its because our mapping doesn't allow the n75 to shut the wastegate for long enough.

 

[YerMother]

What spring did you put in it though scotty? Forge one is the same size (as long as you got the k04 transverse one) and if you have the green spring in it it's more or less standard 5-10psi. Yellow is 9-15psi. Blue is next followed by red which is around 22psi or something ridiculous! Just can't see it not working unless it was a dodgy unit! EDIT: or as WW has just said too stiff a spring!

 

[wild willy]

What spring did you put in it though scotty? Forge one is the same size (as long as you got the k04 transverse one) and if you have the green spring in it it's more or less standard 5-10psi. Yellow is 9-15psi. Blue is next followed by red which is around 22psi or something ridiculous! Just can't see it not working unless it was a dodgy unit! EDIT: or as WW has just said too stiff a spring!

Defo give it a go Simon, especially if Scotty can do you a deal with his actuator, the correct spring should yield some positive results.

 

[Scotty_b]

Well we had every spring we could get hold of in there to try and rectify it but in the end i just couldnt afford to carry in trying. Im sure a remap would have sorted it but it was too expensive at the time. Revo actually recomended not to use another actuator as well as they had a look at the codes (and teh custom stage 4 version) to try and get around it. Maybe you guys on other codes can get it to work.

 

[YerMother]

Changed headgasket over the weekend! What a job! Also fitted the Forge Actuator! I think the problem is that it doesn't fit! The rod is around 5mm too short! I had to "alter" the mounting bracket to move it over enough the get the distance. But not too much that the coolent feed pipe fouls on the bolt head mounting it!

The actuator operates alright tbh, as well as the tightened standard one operated anyway. Used yellow spring (9-15psi)

As for my head gasket, looked liked it had gone between cylinders 3&4 on one of the coolent channels. Overheating problem has stopped, but running it on standard settings (0.9BAR), too scared to up the boost until I've done a few miles!

 

[wild willy]

Changed headgasket over the weekend! What a job! Also fitted the Forge Actuator! I think the problem is that it doesn't fit! The rod is around 5mm too short! I had to "alter" the mounting bracket to move it over enough the get the distance. But not too much that the coolent feed pipe fouls on the bolt head mounting it!

The actuator operates alright tbh, as well as the tightened standard one operated anyway. Used yellow spring (9-15psi)

As for my head gasket, looked liked it had gone between cylinders 3&4 on one of the coolent channels. Overheating problem has stopped, but running it on standard settings (0.9BAR), too scared to up the boost until I've done a few miles!

Nice work Simon, did you consider buying a longer wastegate rod as i believe forge offer a range of sizes.

 

[YerMother]

Just phoned up and ask for k04 actuator for bam engine, and they said it would fit. Rod wasn't that much of a problem, the bracket was what needed most of the work.

 

[wild willy]

Reviving an old thread. Todays log.
Spec :- Forge actuator set at 13psi (measured), Large jetex cone filter, Oversized maff to offset 4 bar pressure reg.
MBC plumbed in parallel to reduce high boost spike and torque.
True max air mass reading =242g/s.
The lcr is pulling very well which i believe is a genuine 300bhp.
'003
RPM Mass Flow Load Ign. Timing

/min g/s % °BTDC
2440 49.33 94.1 17.3
2800 77.44 97.6 15.8
3320 145.69 100 6.8
4160 174.39 100 6.8
4800 194.17 100 12
5440 207.56 100 8.3
5920 212.61 100 9.8
6320 218.44 100 15

2680 59.64 96.9 18
3160 115.75 100 15
3840 162.39 100 6
4520 188.03 100 9
5160 194.31 99.2 12.8
5680 218.42 100 11.3
6200 210.89 100 12.8
6120 0 5.1 6.8

Group B: '115
RPM Load Absolute Pres. Absolute Pres.
TIME
STAMP /min % mbar mbar
124.37 2560 106 2500 1340
125.27 2920 145.9 2490 1840
126.28 3640 191.7 2550 2540
127.18 4360 191.7 2550 2540
128.09 5000 191.7 2550 2540
129.09 5600 188 2460 2540
130 6080 177.4 2370 2450
130.91 6440 176.7 2310 2370

241.03 2800 115.8 2510 1470
242.04 3320 191.7 2550 2430
242.94 4040 191.7 2550 2540
243.85 4760 191.7 2550 2540
244.75 5320 191.7 2520 2490
245.67 5840 182.7 2410 2470
246.66 6320 178.9 2330 2330
247.57 5640 13.5 1010 1440

Group C: '118
RPM Temperature Load Absolute Pres.
TIME
STAMP /min °C % mbar
123.76 2360 34 95.3 1130
124.67 2640 33 95.3 1470
125.57 3120 32 95.3 2120
126.58 3880 31 83.9 2540
127.49 4560 30 84.7 2540
128.39 5200 30 87.8 2520
129.41 5760 32 87.1 2420
130.3 6200 33 85.9 2320

240.43 2600 33 95.3 1160
241.33 2920 32 95.3 1680
242.34 3600 31 84.7 2540
243.24 4280 30 83.1 2540
244.15 4960 30 84.7 2540
245.05 5480 30 87.8 2500
246.07 6040 33 83.5 2420
246.97 6480 34 82.4 2380

 

[YerMother]

How you getting on with the mbc? Does it eliminate boost spike?

 

[DPJ]

Reviving an old thread. Todays log.
Spec :- Forge actuator set at 13psi (measured), Large jetex cone filter, Oversized maff to offset 4 bar pressure reg.
MBC plumbed in parallel to reduce high boost spike and torque.
True max air mass reading =242g/s.
The lcr is pulling very well which i believe is a genuine 300bhp.
..........

Looking good, Carl.

Did you log 002/031 to calculate airflow from injector timing / a/f?

 

[wild willy]

How you getting on with the mbc? Does it eliminate boost spike?

Its worth doing. Its a bit of a pain to find the sweet spot. When set up you do notice the big torque kick is gone, but it pulls very smoothly to the red line. I couldn't get peak boost below 2540 though since to get to below this level would reduce boost at the red line that is not spike derived. I'm happier that my clutch will last longer and my rods won't bend.

 

[wild willy]

Looking good, Carl.

Did you log 002/031 to calculate airflow from injector timing / a/f?

I've guestimated peak airflow by simply increasing measured air mass by the %increase of csa of enlarged air mass housing. I'm not sure how accurate it is.
i'll take some logs soon but i'll have to re read your thread to see the maths behind it and see if i can compare the results to the above.

 

[YerMother]

TBH the spike is only a problem for me if you boot it in 6th gear below 4,000 rpm which can be a pain on a motorway run. RR days can be scary too. I could do a similar thing with the boost controller i have i may give it a go one day, but i'm guessing you loose abit of the spool up speed?