Hussein's 1998 V70 Xr : The Force Awakens

[lookforjoe]

Had a couple of minor issues - strut mount bearing came apart on the driver's side - made a horrible clicking/clunking. OBDII port & AC diagnostics died a few times - blowing fuse #5. I found the eBrake pivot rod circlips let loose & the lever was lifting too far & pinched a wire in the connector harness.

With those out of the way, I raised the boost just a couple psi & did some careful pulls. Found some part load lean areas in the VE map that needed tweaking.

Now I have a little knock in 3rd gear, for the most part requested timing still aligns with actual, which seems odd. Cyl#1 has one of the stock coils, that I'm running until the two replacement BoschMotorSport coils come back. Not going to worry about a degree of two of knock until I get that other coil back in place to see if that makes a difference.

System voltage doesn't drop below 13v with the larger alt pulley.

After looking at the log, I raised the cell value that corresponds with the 13.1 AFR @ 12:481 to bring it closer to 12.5 at that load point.

AFR's are kind of rich, but since I want to raise the boost a couple more PSI, I'm going to leave that as is. This is probably due to the fact I have been tuning with dropping volume up top with the previous single DW300 setup.

Not in 4th

[lookforjoe]

Raised the boost to 24psi today - had an hour or so drive home down a nice sweeping highway, so I took advantage of that. In previous dyno testing every psi increase in boost translated into 15AWHP increase - I had been running 21.7 max with previous fueling setup to limit lean out due to volume drop off.

I logged a few short pulls, didn't sustain it over time, since I had no idea whether the fueling was appropriate - turns out it was definitely lean(!!), and some knock ensued. I have adjusted the VE & WOT maps, so see how that goes on the next pull.

Knock, Knock

affected cells, red highlights indicate increased cell values to compensate for the now lean AFR's at 24psi boost

[lookforjoe]

Got issues with the VAG-COM device - finally got it to connect today, so I was able to capture a log this afternoon.

AFR's are better with the changes I made, but still have knock. So, I'll have to pull a little timing next. What's odd is that in this target load cell, requested timing was 17.25ºBTDC, so even though there is knock, it's adding timing here.

Adding a little more fuel in these areas

Installed the fuelabs filter this evening, so no more priming the system for starting.

[lookforjoe]

Log from today - revised fueling, still a little knock on cyl#4 - but no actual timing pull - which is the part I don't quite understand. Don't see how lowering requested timing would be helpful if it's not pulling timing as it is.

The Fuelab filter helps maintain rest pressure for a couple hours, then it still drops off, so for cold starts I still have to prime system. I'll have to query AEM on the FPR. Perhaps it cannot hold rest pressure .

10/05 EDIT: Fuelabs stated that their FPR's have the same seat design as AEM, so unlikely to maintain rest pressure any longer than the AEM.

[Tightmopedman9]

I love how at 22psi and 7020RPMs your fuel injectors are only at 67% DC.

Why is it that you don't want to try out E85, is it because there is no stations close by?

[lookforjoe]

I love how at 22psi and 7020RPMs your fuel injectors are only at 67% DC.

Why is it that you don't want to try out E85, is it because there is no stations close by?

I'm not logging boost yet - that gauge is still connected to the tank pressure sensor EVAP circuit. In one of my earlier screenshots it shows 27psi.. I have is set to max 24.4psi with the Greddy OLED. My Innovate logging setup doesn't work with the ECU's flashed via TunerPro - I've tried several times to connect with no luck at all. I'm going to go a different route for logging most all my previous parameters.

Increasing or rather stabilizing the volume at higher loads with the dual pumps & larger lines must have helped, since the IDC's are lower now at higher boost and increased fueling levels.

There are few E85 stations, but one of them is not that far away, when I checked last year.

Has a relatively cut & dry formula been established for the required fueling increase? My recollection is that it was about 33%?

[VulvaS40T4]

Fuel increase from gasoline to e85 is about 30%. You should only use e85 on high boost applications.

[lookforjoe]

Fuel increase from gasoline to e85 is about 30%. You should only use e85 on high boost applications.

I'm unlikely to run even 2 bar. With 93ron, and my current setup, every pound of boost increase = about 15AWHP increase, based on the dyno logs from last year. I want to dyno this fall once I get the knock sorted out at the current 24.5psi/1.69bar.

[VulvaS40T4]

Your ignition timing is pretty high on those points where it knocks. 15-20degrees in there. I remember with my car and gasoline it was very knock limited on 5500-6500rpm areas with 2.0bar boost 460hp. I had to run something like 6-10 degrees timing on there and low 11afr ratios.

Try lower you ignition timing.

Edited September 28, 2014 by VulvaS40T4

[fischmama]

I wouldn't run E85 in the US unless you have an ethanol content sensor attached to your EMS to adjust fueling. E85 at Gas stations can have anything from 50-85% Ethanol content. It is not normed as strict as regular gasoline.

If you get it at the same station you may get lucky and it be alright but it may differ from tank to tank and throw your fueling off.

[lookforjoe]

Your ignition timing is pretty high on those points where it knocks. 15-20degrees in there. I remember with my car and gasoline it was very knock limited on 5500-6500rpm areas with 2.0bar boost 460hp. I had to run something like 6-10 degrees timing on there and low 11afr ratios.

Try lower you ignition timing.

The problem I've had in the past is running less timing & more boost doesn't equate to better street performance. Anything less than 10º wasn't good.

What turbo were you running when you had to run 2bar to make 460HP? I only needed 21psi/1.45bar to make 450AWHP. Do you have sample timing that you have run for full load? What is your rev limit?

I will try lowering timing a little, however it pulls harder with more timing. Finding the bleeding edge of timing/knock is going to be the challenge

[clintonpriddle]

What's odd is that in this target load cell, requested timing was 17.25ºBTDC, so even though there is knock, it's adding timing here.

The ECU will interpolate between adjacent cells, so no timing is being "added", instead is influenced by the next cell (7590RPM). It is some sort of weighted averaging. Not sure why it is not pulling timing there though, have you played around with your knock settings?

[Simply Volvo]

Take a look at the BITS datalog item. If it's greater than 128, real knock is being detected. It's possible your getting ghost knock or knock is being detected once and the rest is adaptive.

Edited September 29, 2014 by Simply Volvo

[VulvaS40T4]

The problem I've had in the past is running less timing & more boost doesn't equate to better street performance. Anything less than 10º wasn't good.

What turbo were you running when you had to run 2bar to make 460HP? I only needed 21psi/1.45bar to make 450AWHP. Do you have sample timing that you have run for full load? What is your rev limit?

I will try lowering timing a little, however it pulls harder with more timing. Finding the bleeding edge of timing/knock is going to be the challenge

I had hx35 with 54mm compressor and 60mm turbine and 12# exhaust housing. Backpressure was same as boost and was limiting power. My revlimit is now 8250rpm. I noticed also then that with more timing and gasoline it run faster but i had to retard timing because real knock what i heard with headphones. So it was not ghost knock.

Timing on gasoline and e85 with that turbo:

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E85 timing was not optimized.

Edited September 29, 2014 by VulvaS40T4

[lookforjoe]

Log from today

No knock in 4th, but knock in 5th. BITS went to 163 (Thanks for that info, Matt) @ 72:848 - 2.25º of pull at that instant. ZWBEG is requested timing, next column is actual. Still much better than previously, I've been adding more fuel to the areas immediately before it demonstrates knock.