Hussein's 1998 V70 Xr : The Force Awakens

[EricF]

Also, just thinking of things to look at here... Since you have had the issues with oil in the intake tract, have you emptied your intercooler? Oil can build up especially with a smaller and shorter core pretty quickly... If you lose the bottom few rows due to oil pooled up, it's probably a measurable difference in your intake air temps.

[lookforjoe]

I think that's some progress. Looks like you have some decent timing for the most part, and your AFRs are nice. The one spot it gets to 13:1, it's well past the torque peak.

I bet it feels decent up top, despite your cam timing... How does it feel?

That sure does for all the world look like a knock event around your boost threshold and retarded timing as a result. If you could just get more ignition timing from 4100-5500....

This morning (after driving the company van for a week because I kept parking it behind the 850), the stars aligned and I was stopped at a light by myself on a normally busy road with no one ahead of me or behind me... Got to row through the gears a little before coming up on some traffic

Hi Eric

The cam timing is now where it should be - and definitely feels better for it! I can easily add more timing up top, I'll just have to do it in gentle increments once I have the Map Trace Record feature at the end of the month, so I can be sure I'm adding in the appropriate load areas.

It feels much better overall, but less powerful (excluding where it was going flat previously). I need to find the right balance. Adam said the same thing about the timing; I set the Apexi to limit boost control to mechanical below 4k, to reduce knock onset in the peak torque area. Looks like it's not quite working, based on this log :rolleyes:

[EricF]

Hi Eric

The cam timing is now where it should be - and definitely feels better for it! I can easily add more timing up top, I'll just have to do it in gentle increments once I have the Map Trace Record feature at the end of the month, so I can be sure I'm adding in the appropriate load areas.

It feels much better overall, but less powerful (excluding where it was going flat previously). I need to find the right balance. Adam said the same thing about the timing; I set the Apexi to limit boost control to mechanical below 4k, to reduce knock onset in the peak torque area. Looks like it's not quite working, based on this log

Just be careful with doing too much without getting some sort of performance reference... Cars with correct timing curves usually don't feel as fast as cars that have big timing problems (that have really punchy powerbands that tend to fall off after the knock you in the face because power isn't very linear). My current setup is a very underwhelming feel compared to previous similar setups run on Motronic, but it is definitely making more power with less boost.

[lookforjoe]

Also, just thinking of things to look at here... Since you have had the issues with oil in the intake tract, have you emptied your intercooler? Oil can build up especially with a smaller and shorter core pretty quickly... If you lose the bottom few rows due to oil pooled up, it's probably a measurable difference in your intake air temps.

Yeah, I removed & flushed the entire system from compressor to TB. There wasn't that much in there, just a few ounces, maybe. My IC is set with the I/O at the bottom, so there's really no where for it to pool

[lookforjoe]

Here's the dyno log (260WHP) and my pull from this morning back to back. Unfortunately I didn't go WOT as early as the dyno pull, but for overall comparison, the AFR & timing look so much better!

TTrev013f2 level into steep uphill grade

Just be careful with doing too much without getting some sort of performance reference... Cars with correct timing curves usually don't feel as fast as cars that have big timing problems (that have really punchy powerbands that tend to fall off after the knock you in the face because power isn't very linear). My current setup is a very underwhelming feel compared to previous similar setups run on Motronic, but it is definitely making more power with less boost.

Good to note!

[Captain Bondo]

The fact that afr and timing are changing together for no apparent reason is disturbing to me. If you set the whole 100% timing row to 5 degrees, timing should be rock solid. Did you ever figure out if you can log knoclk events?

Have you verified the timing with a timing light?

IMO it is best to approach this more form a troubleshooting perspective than a tuning perspective at this stage. You're not currently in control of the system.

[lookforjoe]

The fact that afr and timing are changing together for no apparent reason is disturbing to me. If you set the whole 100% timing row to 5 degrees, timing should be rock solid. Did you ever figure out if you can log knoclk events?

Have you verified the timing with a timing light?

IMO it is best to approach this more form a troubleshooting perspective than a tuning perspective at this stage. You're not currently in control of the system.

I cannot log knock events in my setup.

When comparing when not under full load, the timing in Logworks matches the timing in TT.

Not sure what you mean, Kenny- the timing & AFR have changed because this is a different tune, mapped for 20psi instead of 24/25psi.

EDIT:

On the way home, I reloaded the 24psi map & lowered the top row 4200 - 7600 to 5º

and then lowered the top 2 load rows 4200- 7600 to 5º

I must have something seriously wrong elsewhere in the map, as it pulled the timing even worse by lowering it like that.

[Captain Bondo]

No I mean changing in your datalog. When the MAF goes to 100%, if you enter say 5 degrees in all of the RPM bins at 100, the timing should stay flat at 5 degrees but it's all over the place. Look at 4500 rpm and 5500rpm. There is a blip in the timing and a corresponding blip in the afr. That should not be happening.

[Boost3237]

No I mean changing in your datalog. When the MAF goes to 100%, if you enter say 5 degrees in all of the RPM bins at 100, the timing should stay flat at 5 degrees but it's all over the place. Look at 4500 rpm and 5500rpm. There is a blip in the timing and a corresponding blip in the afr. That should not be happening.

Yup there is definitely a greater issue there. Its difficult to tell what it could be though....

[Captain Bondo]

That is why I am saying he should be troubleshooting these inconsistencies, rather than just trying to tune around them.

[lookforjoe]

No I mean changing in your datalog. When the MAF goes to 100%, if you enter say 5 degrees in all of the RPM bins at 100, the timing should stay flat at 5 degrees but it's all over the place. Look at 4500 rpm and 5500rpm. There is a blip in the timing and a corresponding blip in the afr. That should not be happening.

That's the problem.

100% Maf does not = 100% load in TT, so I can't simply enter 5º in all the rpm bins. Until Map Trace Record comes out, I have no way by myself of determining exactly where the timing changes need to be made. Since most of my logs are on open road, undulating or often uphill, it is virtually impossible to maintain steady throttle, and the load changes.

In these logs, I tried running 1.60Kg/cm2, and I discovered that my throttle actually opens quite a bit more than I had thought, in terms of recorded voltage (now with the manual throttle cable), so now I wonder if I've ever been hitting the WOT settings.

That is why I am saying he should be troubleshooting these inconsistencies, rather than just trying to tune around them.

I honestly don't know where to go with this. Try new knock sensors? The knock sensor vertical accel sensor on the subframe? I don't know. When I hooked it up at the dealer with the Volvo tool, there are no fault codes for any components.

[bum2kev]

i would wait for the map trace logging... using another piece of hardware that looks like its not 100% in sync with the other is almost going to be impossible. so you like the manual throttle cable? :)

[lookforjoe]

i would wait for the map trace logging... using another piece of hardware that looks like its not 100% in sync with the other is almost going to be impossible. so you like the manual throttle cable?

Hi Kevin

Yeah, it does feel better, more subtle control.

I know I should just wait, but I'm impatient Anyway, I've only got a few weeks to wait, so I'll just play with refining the fuel maps as best I can.

EDIT: read through an old ME4.3/4 Volvo training manual last night - the WOT voltage is considered any over 4.2v approx 4.3v being the max opening.

[lookforjoe]

Been busy resealing the bevel gear &b installing manual AWD axles. Changing CV boots is one of the worst jobs ever. Modified the turbo oil drain tube one more time, as there was still some weepage around the base seal ring.

Another week before the revised TT is out, but I had to play a little, so I loaded the original Woth tune & started tweaking that, running 23psi instead of 25

Definitely too lean for safety, but much more timing overall. Basically, I think I have to add more fuel & more timing to my maps, because this feels worlds better.

[lookforjoe]

added some more fuel up top.... still a tad lean, but nothing hairy & the timing is much better

60-100 in about 6.5sec. Have to try it in 4th next time, to avoid lost time shifting.