MY04 Liberty GT - FrankenStien - EOI welcome / FS

[dr20t]

retafddf

yep.

Oh the irony

[Deep Heat]

You've invested so much time into this and you are still a virgin. How do you feel?

lol typical Matt argument right here.

[dr20t]

677 g/ second of airflow and 5.8 g/rev load logged tonight

3rd gear pull to 7500rpm

Now time to start putting some timing back into it.

[peadya100]

Is that approx 670hp Mick?
If so thats epic!!!

[dr20t]

With the maf scaling due to the 3" maf pipe, I would say its closer to 600 flywheel hp.

Given the point of comparison though the previous peak was 645g/second which tells me its up on torque

[peadya100]

Geez!
And obviously adding timing will gain you even more. Can't wait to see this thing when you're done!

[KiDo_Tuning]

Thought I had replied but I guess not. Its not a tit for tat though mate.

That is stock R205/S206 AVCS overlap as posted on NASIOC by me

Being 6 or even 12 or worse 24 degrees off mechanically is actually 'fixed' by the OCV as it has closed loop control of AVCS BUT it limits the total true AVCS limit hence why I was getting noice from the cam gears hitting their internal stoppers
In yours, the AVCS would drift/drop as the OCV would try to achieve target, thats why I had to pull so much out and said we needed to sort the AVCS solenoids duty tables. At Insight, the cam gears ended up with so much pulled out because it was noisy on inital cam change hence why under initial throttle movement, where cams are allowed to 'trace' in open loop until they have new targets, it would go so far off then come back. Thats why when I tried running more AVCS advance and exhaust retard, it would not work on a dyno and is why I had less retard up top which was accounting for the tooth being off on gearchanges causing noise as it shifted gear, dropped to trace AVCS before finding target again. I optimised it to what it 'was' and is why road tuning when linear throttle movement kept AVCS aligned better shifted me in the direction of more overlap down low but also why exhaust avcs went to less retard up top.

Insight Dyno and Hakan was 23 August 13, I had my suit measure up for mates wedding that afternoon. Relevance was tuning it on the old choked catback exhaust. Overlap was not healthy for it with cylinder scavenging. December 2013 we have CEL flash each time I tried winding in AVCS from what we would now assume was the unbalanced engine.

Dont get me wrong, glad its finally making decent torque. I hate on/off power deliveries

Matt please don't let this descend into one of these tit for tat arguments

And please remove your avcs tables it doesn't achieve anything other than disrepecting your IP - I'm not going to compare tables.

Long and short is it wasnt making power below 4000rpm mate. We had two sessions at insight, 2 at autosport and a couple of road sessions. Surely it would've been enough to figure it out.

And Hakan only decatted that's all he did. That was after the first dyno session in july 2013.

Maybe you can look at why that was happening. Yes exhaust cam being retarded will cause sluggish response down low, but you could've tuned around this with the highly adjustable exhaust avcs I have. Infact the way I've done it now gets the best of both worlds. Compressor surge in 4th at 3700rpm tells you something. And you're wrong about the overlap.

Interesting also that I've seen and heard you suggest a retarded static exhaust cam setup on this and other forums before- which tells me you actually saw value in the retarded exhaust am I wrong? And if so that means you can optimise the tune for the retafddf exhaust.

Anyway I do appreciate all the stuff we've discussed and learnt over the years. You just shit me with your above comment when you trivialized the fact that it was so easy to make power down low now when I was sweating on this same issue for a while.

As I've always said, you do know alot, but I don't think you ever really optimised my dual avcs setup.

Mick

[JMlegacy]

OK. So I while I understand Dr20T's anguish, I do understand Kido as well.
Dr20T has been resourceful to me in the past, and KIDO showed me a thing or two in tuning

I hope u guys don't carry any feelings from here on.


Anyways, So Dr20T, I'm trying to spool my VF34 turbo on stock legacy block. I have retarded the ex and advanced the intake down low hoping it would give me some power in overlap.

Whats your launching spool combination now? Lots of overlap down low + pulled timing (how much total) and pulled fuel, (how much afr?)

This is real good info as I'm still positive i can get a vf34 to spool and brake boost launch.

Sorry to hijack your thread. PM me if anything

[dr20t]

No bad feelings here

Matt has been helpful to me and I respect his input to myself and the forum.

But just saying he is human and didnt neccesarily get my setup right. Nothing wrong with that I still see value in his knowledge.

In terms of spooling a vf34, you shouldn't have any problems doing it with your normal tune.

Trick I use is hold brake pedal down with left foot, put it into neutral whilst keeping force on the brake pedal, give it a slight rev to drop manifold vacuum. You should feel the brake pedal depress a little further if you're holding it down.

Put it back into drive (or manually select 1st), then go wide open throttle.

Will instantly rev up to around 2500rpm, then slowly start to build boost if you hold it down for 3-5 seconds.

On a good tune with good fuel, should see very decent boost built up while stalling

No need for other timing or overlap trickery on a vf34.

Mick

[JMlegacy]

well, I've been trying for ages. Most i got to was 2400 on my poor fuel. I'm running some octane booster now so I'll revisit that today.

[dr20t]

well, I've been trying for ages. Most i got to was 2400 on my poor fuel. I'm running some octane booster now so I'll revisit that today.

Octane booster is rubbish

You're not trying hard enough

I was stalling my gt2871 on my ej20x to 18psi on the brake

To put it in perspective, a vf34 has the same turbine wheel inducer of 53mm (2871 is 53.8mm so slightly larger) and a slightly larger turbine exducer of 48mm compared to 47mm of the 2871

However the 2871 has a much larger compressor wheel inducer of 53.5mm (compared to 48mm of vf34) and a much larger compressor exducer of 71mm compared to 60mm of the vf34.

This means the 2871 is laggier than the vf34, so your vf34 should spool up easier

Hold both feet flat down for a few seconds and let it build boost man!

[JMlegacy]

my octane booster is actually alcohol, real boost. Not the stupid on the shelf ones. I also adjusted fuel rate accordingly

[JMlegacy]

Well, let's see how it goes later

[JMlegacy]

Most boost i saw was 5 psi. Nothing more. Car would not past 2600 rpm.

[dr20t]

Most boost i saw was 5 psi. Nothing more. Car would not past 2600 rpm.

How long are you sitting there for?

Have you manually selected 1st gear?