[JunkyardDogg]

First map with Stage 1+
https://datazap.me/u/junkyarddogg/lo...og=0&data=3-22

[dpaul]

Originally Posted by JunkyardDogg

First map with Stage 1+
https://datazap.me/u/junkyarddogg/lo...og=0&data=3-22

Timing corrections on 5 of 6 cylinders - looks like you need more octane

[dpaul]

Originally Posted by studio54

General question here :

Beside cutting the midpipe and visually checking them, is there a way to check on logs that secondary cats are still in good shape ? ( a bit afraid of their health when running tuned and catless DP for a while)

If boost value/vacuum immediately goes to -11.5psi on let off after a pull does mean there is not exhaust restriction ?

There is no way to check the secondary cats. Your intake manifold pressures on pedal liftoff are not going to reflect exhaust issues.

[dpaul]

Originally Posted by riczon.335i

Hey guys can someone check my logs please I have been chasing down this issue where I'm not meeting boost target in 3rd gear pull on my custom tune and it's been driving me crazy. I have already replaced all vac lines, new boost selenoids, checked the VRSF chargepipe it's on tight. checked the Tial BOV everything is fine there. Anyone else care to chime in on what could it be? I have re tightened all the intercooler connections. I'm about to pull my hair out lol.

My Mods:
VRSF Competition FMIC 7.5
VRSF DCI
VRSF Chargepipe with Tial BOV
n54tuning Downpipes


https://datazap.me/u/riczonh/custom-...og=0&data=3-23

https://datazap.me/u/riczonh/custom-...og=1&data=3-23

Have you tried removing your custom tune? As SGOP335 suggests, your WGDCs don't make sense

[JunkyardDogg]

Originally Posted by dpaul

Timing corrections on 5 of 6 cylinders - looks like you need more octane

Originally Posted by dpaul

Timing corrections on 5 of 6 cylinders - looks like you need more octane

It's a 93 map and that's what I'm running. Don't think there is higher near me. Any other options? Otherwise I can go back to just stage 1. Although my fmic isn't being put to good use.

[dpaul]

Originally Posted by JunkyardDogg

It's a 93 map and that's what I'm running. Don't think there is higher near me. Any other options? Otherwise I can go back to just stage 1. Although my fmic isn't being put to good use.

Just add a gallon or two of E85
But surprised you’d need it on Stage 1 with 93

[studio54]

Originally Posted by dpaul

There is no way to check the secondary cats. Your intake manifold pressures on pedal liftoff are not going to reflect exhaust issues.

Ok thanks.

And let's say, if i unplug both canister, and check vacuum on monitor MHD gauge , like going the engine to 3000 rpm and waiting if there is a slow drop off for example ? it will not reflect any exhaust restriction ?

[dpaul]

Originally Posted by studio54

Ok thanks.

And let's say, if i unplug both canister, and check vacuum on monitor MHD gauge , like going the engine to 3000 rpm and waiting if there is a slow drop off for example ? it will not reflect any exhaust restriction ?

Canister? The vacuum canisters have nothing to do with the intake manifold at least in a 335. There is a mechanical vacuum pump that generates the vacuum used to operate the wastegates and the power brakes.

OK, so now let me walk back the categorical negative in my earlier post.

Yes, in theory, an exhaust clog could be reflected in a change in the intake manifold vacuum. That vacuum should be highest at idle and decrease as the throttle opens. On a turbocharged engine, the vacuum would quickly change to positive pressure but in a normally aspirated engine the vacuum would trend toward zero as full throttle is approached. In theory, an exhaust restriction will affect those values but not in a dramatic way.

Your problem is that you have no baseline. If you had measured intake vacuum at idle and then at say 2000rpm in no-load condition on a vehicle similarly equipped to your BUT WITH NO EXHAUST RESTRICTIONS, you'd be able to make a useful comparison to the behavior of your car.

Without that baseline, any numbers you record are useless, unless the clog is so bad that engine performance is quite dramatically affected.

[studio54]

Originally Posted by dpaul

Canister? The vacuum canisters have nothing to do with the intake manifold at least in a 335. There is a mechanical vacuum pump that generates the vacuum used to operate the wastegates and the power brakes.

OK, so now let me walk back the categorical negative in my earlier post.

Yes, in theory, an exhaust clog could be reflected in a change in the intake manifold vacuum. That vacuum should be highest at idle and decrease as the throttle opens. On a turbocharged engine, the vacuum would quickly change to positive pressure but in a normally aspirated engine the vacuum would trend toward zero as full throttle is approached. In theory, an exhaust restriction will affect those values but not in a dramatic way.

Your problem is that you have no baseline. If you had measured intake vacuum at idle and then at say 2000rpm in no-load condition on a vehicle similarly equipped to your BUT WITH NO EXHAUST RESTRICTIONS, you'd be able to make a useful comparison to the behavior of your car.

Without that baseline, any numbers you record are useless, unless the clog is so bad that engine performance is quite dramatically affected.

Ok thanks you for your message.

I know that vacuum canisters have nothing to do with intake manifold but that's exactly why i said we probably can unplug them to disable turbos operation (no vacuum at boost solenoids = wastegates open) and acts as a N/A car to make the vacuum measurment.

Also baseline will be a N54 engine with catless DP and OEM secondary midcats, it should be easily comparable with other members, if anyone want to test those values with me, i can make the test as soon as possible.

[HB E90]

I just put a 91 1+ tune on her after having to get a smog check. The boost is a bit erratic? What causes it to fluctuate up and down like this when I put my foot in it? I'll try going back to E30 as soon as I can put 4 gal of E85. https://datazap.me/u/curt/v71-stage-...og=1&data=3-22

[riczon.335i]

Yes I tried going back to MHD maps and they all respond the same way for some odd reason always off 3rd gear boost target.. should I try flashing back to stock and then reflashing?

Originally Posted by dpaul

Have you tried removing your custom tune? As SGOP335 suggests, your WGDCs don't make sense

[dpaul]

Originally Posted by riczon.335i

Yes I tried going back to MHD maps and they all respond the same way for some odd reason always off 3rd gear boost target.. should I try flashing back to stock and then reflashing?

That's what I'd do - and before reflashing any tune, make sure the vehicle operates normally with a stock calibration file.

[335xirookie]

this is my first attempt at posting a log can I please have somebody take a look and tell me what's wrong..... assuming that there's a bunch of stuff wrong..... 08 335xi eldor coils just installed, charge pipe/hks, 5" Amazon intercooler, dci and stage 1+ and that's it.... thank you all in advance....


https://datazap.me/sites/default/fil...3oct_98ron.csv

[Sgop335]

Originally Posted by 335xirookie

this is my first attempt at posting a log can I please have somebody take a look and tell me what's wrong..... assuming that there's a bunch of stuff wrong..... 08 335xi eldor coils just installed, charge pipe/hks, 5" Amazon intercooler, dci and stage 1+ and that's it.... thank you all in advance....


https://datazap.me/sites/default/fil...3oct_98ron.csv

Its just a bunch of numbers

[335xirookie]

this is my SECOND attempt at posting a log can I please have somebody take a look and tell me what's wrong..... assuming that there's a bunch of stuff wrong..... 08 335xi eldor coils just installed, charge pipe/hks, 5" Amazon intercooler, dci and stage 1+ and that's it.... thank you all in advance



https://datazap.me/u/335xirookie1/lo...k=46-49-55-69#

[Sgop335]

Originally Posted by 335xirookie

this is my SECOND attempt at posting a log can I please have somebody take a look and tell me what's wrong..... assuming that there's a bunch of stuff wrong..... 08 335xi eldor coils just installed, charge pipe/hks, 5" Amazon intercooler, dci and stage 1+ and that's it.... thank you all in advance



https://datazap.me/u/335xirookie1/lo...k=46-49-55-69#

Lots of throttle closure due to 8.1. Stft has maxed out early in the run and may be running lean...an adaptation could help. Lots of timing corrections could be due to low octane...

[Hededyo]

I might need to change coil packs, just got the car and did all the services I'm trying to find anything else I might be missing, running MHD 7.1 stage 1 no mods installed car is completely stock with around 160k miles any feedback would be great

https://datazap.me/u/hededyo/log-157...og=0&data=3-20

[335xirookie]

Originally Posted by Sgop335

Lots of throttle closure due to 8.1. Stft has maxed out early in the run and may be running lean...an adaptation could help. Lots of timing corrections could be due to low octane...

I reset adaptions and went to 7.1 and will log again asap... thanks again

[Timothi2]

Feels good, I'm a little under boost target and my AFR's are a little off. Any ideas?

https://datazap.me/u/timothi2/pull-m...25&zoom=22-109

[335e92tx]

Originally Posted by Hededyo

I might need to change coil packs, just got the car and did all the services I'm trying to find anything else I might be missing, running MHD 7.1 stage 1 no mods installed car is completely stock with around 160k miles any feedback would be great

https://datazap.me/u/hededyo/log-157...og=0&data=3-20

Second and third gear logs are a little to brief to get some hard fast data.. Try a 3rd and a bit of 4th..

But even with that you got some retards right after the shift. Short term trims are pretty high. So how long ago did you flash it??
Might be still adapting. What kind of fuel is this? Dont use grocerystore - get some name brand avail in your area.

I think your prob gonna need one step colder plugs at least.
oh, and your IATS go up 22 degrees in 5 secs.. Thats not gonna make power after the shift into 4th.. Its gonna pull power.

Start with different fuel.

[335e92tx]

Originally Posted by Timothi2

Feels good, I'm a little under boost target and my AFR's are a little off. Any ideas?

https://datazap.me/u/timothi2/pull-m...25&zoom=22-109

It doesnt look like you got the variable for GEAR logged. Turn that on.
You can prob turn off COOLANT since that shouldnt really go up during a pull.

Ah,, with regard to fuel, Im more seeing the short term trims being really high adding fuel but bank #1 doesnt really need it.. and I wouldnt think bank two would need that much

https://datazap.me/u/timothi2/pull-m...25&zoom=22-109

So how long as it been since it was flashed? Reset adapts for Lambda sensors and controls and then drive awhile and log again. This just pump gas 91 from like cali right?

What are the mods again? And how old are o2 sensors?

[Hededyo]

Originally Posted by 335e92tx

Second and third gear logs are a little to brief to get some hard fast data.. Try a 3rd and a bit of 4th..

But even with that you got some retards right after the shift. Short term trims are pretty high. So how long ago did you flash it??
Might be still adapting. What kind of fuel is this? Dont use grocerystore - get some name brand avail in your area.

I think your prob gonna need one step colder plugs at least.
oh, and your IATS go up 22 degrees in 5 secs.. Thats not gonna make power after the shift into 4th.. Its gonna pull power.

Start with different fuel.

so that run was right after flashing from v8 back to v7.1 as I didn't like the feel of the map so maybe it was part of it

I definitively need to change gas as I keep getting corrections and the short trims seem to be all over the place (I usually use chevron and haven't had any major issues so maybe shell (?)), that plus changing coil packs and maybe getting the car walnut blasted since at 160k miles I don't have a record of how good this car has been taken care of previously

thanks a lot for the feedback

here is a run I made today IAT seems to be high, ambient temperature was around 55F with a little bit of fog thanks again for your feedback

https://datazap.me/u/hededyo/log-157...2&data=3-13-20