My H6 transformed

[alexeiwoody]

BAHAHAHAHAAA...

So how does it happen....? All I know is

Pinging

LOLLLLLLL.jpg (20.78 KiB) Viewed 5621 times

[brainy]

Whoever was in charge of ECU programming at Subaru in 2006 was a f**king retard
my car pings it head off at 1500rpm in 6th gear if you stab the throttle, I don't even need LV to pick that

Why would u put an engine under extreme load in 6th gear at 1500rpm?

[Robbks]

Whoever was in charge of ECU programming at Subaru in 2006 was a f**king retard
my car pings it head off at 1500rpm in 6th gear if you stab the throttle, I don't even need LV to pick that

Why would u put an engine under extreme load in 6th gear at 1500rpm?

It's not extreme load, just cruising along flat ground if you push the throttle quickly as you're preparing for a little rise in the road (for example) to maintain speed, it'll ping.
I run purely 98RON fuel and it appears to be a "feature" of the factory tune
Maybe knock control isn't active under the circumstances.

[JLuehman]

"I" mode is horrible. I am mid-tune now and have had I mode changed and it is 1000% better now.

[rooby]

"I" mode is horrible. I am mid-tune now and have had I mode changed and it is 1000% better now.

What's I mode?

[jay.ritchie]

"I" mode is horrible. I am mid-tune now and have had I mode changed and it is 1000% better now.

What's I mode?

i think its slow mode

[Dg6000]

Wow a lot of very technical information! Matt tuned my H6 last week and I am happy with it. I am a pastry chef so absolutely no idea about the mechanics, could not even tell if the car has better fuel economy as Matt stated when we tuned the car. The car defiantly drives much smoother through the gears, idle is so quiet and launch is noticeable. Power through to 3rd speed (cannot get it into 4th with out potentially losing my licence) is noticeably faster and cleaner (crisp) when under max acceleration. There is some pinging but if I don't put the peddle to the floor it is not notable and seems to get to the same speed/acceleration with great response from 3000rpm where before was sluggish then bang at 4500rpm like a power band.

I got what I asked for and hope Matt keeps his word of tweaking the tune when I instal raptor headers later in the year. As far as driving enjoyment my 2005 H6 is transformed /improved and i feel it was money well spent. I was influenced by this forum to use Matt but would also recommend this to other H6 owners.

Just took my h6 for a hard drive very early this morning (5am), no rattle/ping at maximum throttle or at all on the same circuit that we used for the tune. Thanks Matt for following up, very happy with the way the car responds, idles and accelerates.

[jay.ritchie]

There is some pinging

Could you hear it or did you have it up on LV?

[KiDo_Tuning]

The issue with the H6 is that the tune goes from 24 degrees AVCS to 47+ AVCS when switching from Cruise to Power at 2500rpm, the oil pressure advances the cams and the hydraulic tensioner loses pressure, then catches the chain once the cams reach target hence why it has smooth timing but always knocks at the transition points of 2400rpm to 2800rpm then at 4400rpm when the VVL activates(oil pressure controlled again!). 3 out of 4 cars are fine but that 1 in 4 means if you try and pull heaps of timing out or add heaps of fuel, the EGT's skyrocket and that is when headgaskets are compromised. The factory headgasket issue is because the tune gets an IAM so low that it has too much timing pulled, they lose torque and the mixture is still igniting when the exhaust valve opens, which destroys headgaskets
One member commented how the noise disappeared after the tensioner got replaced, no prize for guessing why it works Put knock ears on the timing chain cover and listen for the noise, then move the sensor to the head and the noise is gone.

dg6000 has the same ROM as Marks Veloci, so it now has the Check Engine Light flash on FLKC patch(Marks car was a prime candidate for the patch, SegR will have it soon)

[<GB>]

Why not tune the avcs less in that area if that's happening ? Or maybe slightly thicker oil is needed

[alexeiwoody]

I think matt is saying even on stock - the issue would be there. Robbks seems to agree?

Owners should compare stock tune to matts tune. If it's on stock too, then very unlikely to be piston knock.

[bass_straitener]

The issue with the H6 is that the tune goes from 24 degrees AVCS to 47+ AVCS when switching from Cruise to Power at 2500rpm, the oil pressure advances the cams and the hydraulic tensioner loses pressure, then catches the chain once the cams reach target hence why it has smooth timing but always knocks at the transition points of 2400rpm to 2800rpm then at 4400rpm when the VVL activates(oil pressure controlled again!).

Here are a set of AVCS tables from a stock H6 MT Lib. Please show me the area you refer to. Or are you referrring to your tuned maps that the above occurs.

[dr20t]

It's the same difference I believe - irrespective of actual timing values its the "jump" that seems to be causing concern (20 to 40 at 2400rpm light load)

Not an expert in this at all just throwing my opinion into it

[KiDo_Tuning]

The issue with the H6 is that the tune goes from 24 degrees AVCS to 47+ AVCS when switching from Cruise to Power at 2500rpm, the oil pressure advances the cams and the hydraulic tensioner loses pressure, then catches the chain once the cams reach target hence why it has smooth timing but always knocks at the transition points of 2400rpm to 2800rpm then at 4400rpm when the VVL activates(oil pressure controlled again!).

Here are a set of AVCS tables from a stock H6 MT Lib. Please show me the area you refer to. Or are you referrring to your tuned maps that the above occurs.

26 to 50 degrees Bruce... 1.5g/rev@2400rpm(it is actually an airflow figure in g/sec) for the switch point for the AVCS maps, your welcome to log the switch over point and when the noise occurs See how Subaru KNOW this is the issue and have put in a 50 degree hump at the transition point on the 07 onwards? Yet they still rattle in stock form and so the IAM drops so low that they do not make any low rpm torque and take longer for rpm to rise in 4th/5th/6th gear under high load(ask any H6 owner to accelerate in 6th gear and get out the Calendar to measure its acceleration!) so the engine has longer for AVCS to match up but in say 1st/2nd or 3rd gear they still rattle due to faster acceleration even with less load generated

Look at the total ignition timing tables while you have it open... what do you see?

H6_timing.png (95.68 KiB) Viewed 5390 times

[dr20t]

Max of 2g / second

Pffft - 3.0 litre nothing