Data Logs! Post them here.

[kuno]

Originally Posted by Wayno

ACE headers fit are fairly experimental for stupid price they demand.

The first thing i'd do is take the skid plate off and see if it's been rubbing and if any audible noise goes away.

I can tell you it's fucking shit when your $300 ceramic coat goes down the toilet because the fit of your $1600 header sucks worse than one half the price.

I wouldn't run Caltex either, but if you want to, then just take timing out of the problem cells.

Yeah the header was rubbing before, all sorted now. I think We got the earlier versions of the header?

No more caltex for me. Will try BP and reduce the timing if it still

Thanks Wayno

[Irace86.2.0]

https://datazap.me/u/jirace/wot-pull?log=0&data=29

Tuning with DT. He said I might be running into fuel supply issues so I’m running lean. I’m guessing it isn’t correctable through tuning so that is why he is saying it is on my end. I just wanted a second opinion. I’m running an 85mm pulley which is like 11.5psi on a Harrop supercharger. Most hit about 275whp which I thought the stock fuel system could handle.

[Irace86.2.0]

Seems like the fuel rail is getting consistent pressure so the fuel pump n regulator must be good but the direct injectors seem to be taking over and the ports are flatening out, and that is most apparent with the “fuel injection pi ratio”, if i am understanding it correctly. This is the ratio of port to direct injectors, right?

[Kodename47]

Originally Posted by Irace86.2.0

Seems like the fuel rail is getting consistent pressure so the fuel pump n regulator must be good but the direct injectors seem to be taking over and the ports are flatening out, and that is most apparent with the “fuel injection pi ratio”, if i am understanding it correctly. This is the ratio of port to direct injectors, right?

The fuel pressure is for the DI after the HPFP. That's not dropping off but doesn't indicate much for the PI system. It looks odd that the AFR seems to sort itself out at the top of the RPM bad and that would hint at it not being fuel delivery as you'd expect it to get worse as the RPMs increase.

PI ratio is the % of PI.

[steve99]

Check you DI computer under bonnet is securely grounded via all monuting bolts


Why does fuel ethanol % log/ read 0 if your on E85 ??




Check low pressure fuel pump pressure should be around 45psi you will need to Tee into low pressure fuel line. Although some delicious flex kits do measure low pressure fuel pressure.


Remove fuel filter and check its not blocked (in tank filter), had an NA guy with similar issues had blocked fuel filter, he used some weird fuel additive and it turned to jelly in tank blocking fuel filter, don't use additives with E85

[Irace86.2.0]

Originally Posted by steve99

Check you DI computer under bonnet is securely grounded via all monuting bolts


Why does fuel ethanol % log/ read 0 if your on E85 ??




Check low pressure fuel pump pressure should be around 45psi you will need to Tee into low pressure fuel line. Although some delicious flex kits do measure low pressure fuel pressure.


Remove fuel filter and check its not blocked (in tank filter), had an NA guy with similar issues had blocked fuel filter, he used some weird fuel additive and it turned to jelly in tank blocking fuel filter, don't use additives with E85

If you are referring to my post then no, I am not on E85.

I was considering the fuel filter being clogged. I think I am at 66k miles, which isn't a lot. I usually use Chevron or Shell, but I don't know about the previous owner, but I am willing to consider it could be the fuel delivery. I feel like if it was the injectors then the engine would throw a code or idle rough. It could be the fuel pressure regulator. I don't have a fuel pressure gauge, so I'll have to look into something to test these things.

Here is another log. This time with the 95mm pulley (7.5 psi). It felt smoother and the pulls in any gear at any rpm feel smoother, yet the best response, whether with the 85mm or 95mm pulley, seems to be for just a second or two when I am cruising, but higher in the revs and gun it. But it quickly loses its power and pulls less like it got rich or lean or something. I dunno.

Repeat WOT 85mm pulley
https://datazap.me/u/jirace/repeat-w...?log=0&data=29

WOT 95mm pulley
https://datazap.me/u/jirace/3rd-gear...og=0&data=8-29

[tomm.brz]

maybe PI too high? it seems to max out at 26ms.. that seems too high, and DI seems to have still room to augment it.. try to reduce PI ratio maybe?

[steve99]

Originally Posted by Irace86.2.0

If you are referring to my post then no, I am not on E85.

I was considering the fuel filter being clogged. I think I am at 66k miles, which isn't a lot. I usually use Chevron or Shell, but I don't know about the previous owner, but I am willing to consider it could be the fuel delivery. I feel like if it was the injectors then the engine would throw a code or idle rough. It could be the fuel pressure regulator. I don't have a fuel pressure gauge, so I'll have to look into something to test these things.

Here is another log. This time with the 95mm pulley (7.5 psi). It felt smoother and the pulls in any gear at any rpm feel smoother, yet the best response, whether with the 85mm or 95mm pulley, seems to be for just a second or two when I am cruising, but higher in the revs and gun it. But it quickly loses its power and pulls less like it got rich or lean or something. I dunno.

Repeat WOT 85mm pulley
https://datazap.me/u/jirace/repeat-w...?log=0&data=29

WOT 95mm pulley
https://datazap.me/u/jirace/3rd-gear...og=0&data=8-29

yeah same deal port injector pulse width way high , something weird going on shouldn't need that much pulse width to deliver fueling on petrol you don't want to go ober about 15ms port and about 6ms direct

[Tor]

Originally Posted by Irace86.2.0

If you are referring to my post then no, I am not on E85.

I was considering the fuel filter being clogged. I think I am at 66k miles, which isn't a lot. I usually use Chevron or Shell, but I don't know about the previous owner, but I am willing to consider it could be the fuel delivery. I feel like if it was the injectors then the engine would throw a code or idle rough. It could be the fuel pressure regulator. I don't have a fuel pressure gauge, so I'll have to look into something to test these things.

Here is another log. This time with the 95mm pulley (7.5 psi). It felt smoother and the pulls in any gear at any rpm feel smoother, yet the best response, whether with the 85mm or 95mm pulley, seems to be for just a second or two when I am cruising, but higher in the revs and gun it. But it quickly loses its power and pulls less like it got rich or lean or something. I dunno.

Repeat WOT 85mm pulley
https://datazap.me/u/jirace/repeat-w...?log=0&data=29

WOT 95mm pulley
https://datazap.me/u/jirace/3rd-gear...og=0&data=8-29

Try and log all custom maps and maybe look if the pattern in AFR is mirrored there.

[tomm.brz]

I had a similar afr behaviour when i was trying scaling my port injection, and tried 100% PI. I m NA so obviously i have lower values of everything but when my port injection went over 18ms of opening, afr got weird


Since your DI isnt maxed out i would just try to just add more DI, and then maybe it s time to buy bigger port injectors?

[Irace86.2.0]

Originally Posted by Tor

Try and log all custom maps and maybe look if the pattern in AFR is mirrored there.

I should clarify that DT is doing all the tuning, so I was posting here to see if anyone else has had a similar log and disgnosed the mexhanical problem because that is what my tuner believes is the case. The evidence seems to support that position. I’m leaning towards it being an issue with the fuel filter. I’m under the impression that the whole fuel pump assembly would need replacing, and that it is a bitch to do, nor is it cheap, so hopefully I can survive on the large pulley for now.

[tomm.brz]

Ok but.. 26ms of port injection is extremely high and dangerous, you can t keep it like that
The other logs you posted where port injection ms opening is lower than 20ms have no afr issue

[Tor]

Originally Posted by Irace86.2.0

I should clarify that DT is doing all the tuning...

Yes, I got that part. Hence the suggestion to log the custom maps as the PI ratio is variable:
https://datazap.me/u/jirace/repeat-w...5&mark=519-541

That's not the case in the stock tune, so the only way that can happen is through custom tables. In the stock tune the PI ratios are fixed.

Maybe it's a hardware issue, but as KN47 said AFR is correcting itself (somewhat) above 7000 rpm. If it was a lack of fuel, it would be to expect that it would get worse with higher rpm.

Logging the custom maps might help DT to diagnose if there is an issue with the tune.

Looking in the Ecutek manual, they recommend max DI injection of 5.5 ms and not less than 1 ms from injection end of DI to spark. You have 4.8ish ms and over 4 ms from end of injection to start of spark. Maybe the DI is capable of delivering a higher percentage of the total fuel.

[Irace86.2.0]

My tuner said on the low boost pulley there has been no fuel problems so that is good but it doesn’t answer what the cause was. Im thinking fuel delivery from an old fuel filter. I am at 63k.

I appreciate the advice. Unfortunately the tuning part of things is out of my hands. Only the mechanical stuff can I improve.