[IMS-340C]

So this means an M340i or a Supra will also have 2900 psi rail pressure in their logs ?

Anybody have access to an M340i log ? would really like to compare it our cars.

Originally Posted by Colauk

2900psi is what the dme will be requesting, the problem with the stock hpfp is that at higher loads it wont be able to flow enough to hit the target pressure.

its not about the maximum volume the pump can flow but more its ability to maintain target pressure.

[IMS-340C]

Going from E85 to E50 is like lowering the octane so it's normal to get some timing corrections.

Originally Posted by Sµpreme

We walked our ethanol % back to E50 because gas mileage on E85 was killing me, but I'm seeing timing corrections on some of the new logs.

Pure 800 E50 rev 1.0
https://datazap.me/u/tnilson/second-...og=0&data=4-24

Pure800 E50 rev 1.1
https://datazap.me/u/tnilson/e50-pur...og=0&data=4-24

Plugs are NGK 94201 gapped to 0.022", less than 5K miles on them.

Thoughts?

[kern417]

Originally Posted by IMS-340MP

So this means an M340i or a Supra will also have 2900 psi rail pressure in their logs ?

Anybody have access to an M340i log ? would really like to compare it our cars.

Pressure does not relate to flow. Consider stock turbo vs a big turbo. You can flow more air at the same boost pressure with a larger turbo.

The TU fuel system in a TU engine runs at 5000psi. All of their logs will target 5000psi. High fuel pressure is more efficient in direct injection engines, so it helps will fuel efficiency and other aspects of combustion.

Non-TU engines still run at 2900psi because that's what the injectors are designed for. It'll still flow more fuel than the stock pump at the same fuel pressure.

Theoretically you could swap injectors over from the TU engine as well to run higher fuel pressures, but the gains would be negligible. If anything, running it at a lower fuel pressure helps us run the pump at higher hp levels.

[trescuarenta]

Originally Posted by kern417

Pressure does not relate to flow. Consider stock turbo vs a big turbo. You can flow more air at the same boost pressure with a larger turbo.

The TU fuel system in a TU engine runs at 5000psi. All of their logs will target 5000psi. High fuel pressure is more efficient in direct injection engines, so it helps will fuel efficiency and other aspects of combustion.

Non-TU engines still run at 2900psi because that's what the injectors are designed for. It'll still flow more fuel than the stock pump at the same fuel pressure.

Theoretically you could swap injectors over from the TU engine as well to run higher fuel pressures, but the gains would be negligible. If anything, running it at a lower fuel pressure helps us run the pump at higher hp levels.

Great explanation.

[bacon_45]

Originally Posted by OzBMR

Looks great, boost, AFR, fuel rail pressure and timing all good.

You're RWD and standard MPSS 255/40/18?

Any change of a 4th gear only log?

Dragy times 100 - 200 km/h?

Yes sir, I am surprised that the 255/40/18 pilot sport 4's can handle, I even grip in first gear no problem! I can do a 4th gear log, and no dragy times yet

[340iNL]

Originally Posted by OzBMR

I don't think your logs look too bad and if it was me I'd stick with the 91 octane map for a while. You're getting up to 11 degrees of timing in all cylinders except cylinder 1, which is pretty normal.

I have a theory about DSC off, when there is a very minor variation in wheel speed the DME reduces timing to reduce torque as part of stability control system.

In addition to reducing timing it may also partially close the throttle and reduce waste gate duty cycle to reduce boost. Most of this happens without you feeling it, until the wheel slip is too much, requiring more abrupt intervention by DME.

Deactivating DSC reduces this sensitivity, allowing more wheel slip, up to a point, and therefore less adjustment of torque and timing.

Somehow my logs weren't saved but I discovered but the burble tune off the timing is more equal when doing a log from 2.500 rpm to redline.
Ofc the burbles are created by controlled misfires but... why would the engine calculate over 8 degrees while keeping the foot down? (in my previous logs)

Got almost all cylinders except cylinder 1 timing 2 degrees off now on the same timing. Stage 1 93 with Total Excellium 98 fuel. Will post logs later.

[Supr3me]

Originally Posted by 340iNL

Somehow my logs weren't saved but I discovered but the burble tune off the timing is more equal when doing a log from 2.500 rpm to redline.
Ofc the burbles are created by controlled misfires but... why would the engine calculate over 8 degrees while keeping the foot down? (in my previous logs)

Got almost all cylinders except cylinder 1 timing 2 degrees off now on the same timing. Stage 1 93 with Total Excellium 98 fuel. Will post logs later.

Not sure if there are some typos in here but I've read it 3x and can't quite tell what you're saying in the first paragraph.

Are you saying turning off burble improved your timing?

[340iNL]

Originally Posted by Sµpreme

Not sure if there are some typos in here but I've read it 3x and can't quite tell what you're saying in the first paragraph.

Are you saying turning off burble improved your timing?

Ok trying again

My logs had over 7 degrees differences in timing (read some previous posts of me)
For example cyl 1: 2, cyl 2: 8, cyl 3: 9 etc...
Tried several things to improve timing. Plugs, fuel, tuning maps, and so on.

What I've read it's better to have consistent timing across all cylinders
Over 3 degrees could harm the engine if it's happening often. Mine did all the time even on stock tune.

So I just want to discover why I can't have consistently timing like other B58s. Just because of interest. Probably my car will survive on the stock tune for a while, dealer says it's normal.

Running better fuel did solve a part. Driving with DSC off helps.

I read about burble tunes. They are controlled misfires. So I thought, what if I turn them off. Will it help? Yep it did. Almost equal timing on all cylinders except number 1 which is max 2 degrees off.

Can't post the log because they did not save.


Got the logs today

Gear 3
93 tune

https://www.bootmod3.net/log?id=5ed1...0b434621ac5090

Gear 4
93 tune

https://www.bootmod3.net/log?id=5ed1...0b434621ac5002

Hmm idk burble's off makes no sense then. Gear 3 looks equal, gear 4 isn't. Car does feel a bit better though with the burbles off. My logging story is over now xD

[IMS-340C]

If I got this right you mean Gen 1 B58 with a TU pump at 2900 psi flow the same amount of fuel to cylinders as the Gen 2 B58 TU pump at 5000 psi assuming both have same injectors?

Originally Posted by kern417

Pressure does not relate to flow. Consider stock turbo vs a big turbo. You can flow more air at the same boost pressure with a larger turbo.

The TU fuel system in a TU engine runs at 5000psi. All of their logs will target 5000psi. High fuel pressure is more efficient in direct injection engines, so it helps will fuel efficiency and other aspects of combustion.

Non-TU engines still run at 2900psi because that's what the injectors are designed for. It'll still flow more fuel than the stock pump at the same fuel pressure.

Theoretically you could swap injectors over from the TU engine as well to run higher fuel pressures, but the gains would be negligible. If anything, running it at a lower fuel pressure helps us run the pump at higher hp levels.

[kern417]

Originally Posted by IMS-340MP

If I got this right you mean Gen 1 B58 with a TU pump at 2900 psi flow the same amount of fuel to cylinders as the Gen 2 B58 TU pump at 5000 psi assuming both have same injectors?

The pump is mechanical. At a given RPM it will flow the same amount of fuel. There is a separate fuel pressure regulation system that bleeds unneeded fuel back to the fuel tank.

So with all things being equal, the TU pump flows the same amount at 5000rpm whether it's on a gen1 or TU engine

Your fuel pressure target is set by the tune. Our system is designed to run 2900psi, but some people run more or less. It prevents dips in pressure depending on the tuning strategy.

The TU engine requires 5000psi. At that requirement, you will run out of fuel faster than at our 2900psi requirement. But again it depends on the tuning strategy.

This is all theory since there are more things that go into hp than just fuel flow. For example, higher fuel pressure means that the TU engine can support higher cylinder pressures (more boost) and still have efficient combustion. In the grand scheme of things, they seem to be making more hp than us with their fuel pump and injectors. So it depends on a lot of other factors as well.

[IMS-340C]

To be honest I got a bit confused by the whole burbles thing.

When the F10 M5 came out with a Turbo and burbles it was said that the burbles helps with Turbo Lag.

But now with tuners like BM3 and MHD we could completely turn off the burbles.

So what is the real purpose of burbles? and why is it there if we can turn it off?

On the the other hand people say it damage the cats.

Actually when I turn it off there is no difference in the engine reactions.

Any thoughts ?

[340iNL]

Originally Posted by IMS-340MP

To be honest I got a bit confused by the whole burbles thing.

When the F10 M5 came out with a Turbo and burbles it was said that the burbles helps with Turbo Lag.

But now with tuners like BM3 and MHD we could completely turn off the burbles.

So what is the real purpose of burbles? and why is it there if we can turn it off?

On the the other hand people say it damage the cats.

Always when I turn it off there is no difference in the engine reactions.

Any thoughts ?

I agree. Feels strange to eliminate something which came standard with the car.
I read this article which made sense to me (I'm not an expert at all and just learning and trying to understand my car) but answers some of your questions https://www.fastcar.co.uk/tuning-tec...and-bang-maps/

[Torinalth]

Overall it looks good but trying to figure out why timing is dipping at 4900 and 5800.

bm3 ver 2.1 Stage 2 93.
https://www.bootmod3.net/log?id=5ed0...90c655ccf3cec6

[InstigatorX]

Vehicle: 2018 440i GC RWD 8AT
Tune: MG Flasher v2.10 93Oct ST1 + xHP ST2
Fuel: E18 (Tested E85 + 93/E10)
Mods: Injen Evolution CAI
DEC: SPORT+ and then long press DSC button
Gear: 4th

Log 1: https://datazap.me/u/instigatorx/log-1591041703
Log 2: https://datazap.me/u/instigatorx/log-1591041767

[Eldotbe]

Hey guys, today I fitted the supra pump and also chnaged spark plugs. Am running the BM3 Stage 2+ 93oct map.
Here's the log:
https://datazap.me/u/eldotbe/bm3-sta...og=0&data=3-19

I think it looks pretty good, also looks like a bump in power around 430/440whp from virtual dyno. Anymore input would be appreciated

[kern417]

Originally Posted by IMS-340MP

To be honest I got a bit confused by the whole burbles thing.

When the F10 M5 came out with a Turbo and burbles it was said that the burbles helps with Turbo Lag.

But now with tuners like BM3 and MHD we could completely turn off the burbles.

So what is the real purpose of burbles? and why is it there if we can turn it off?

On the the other hand people say it damage the cats.

Actually when I turn it off there is no difference in the engine reactions.

Any thoughts ?

It does nothing for spool in the grand scheme of things. A car with an automatic transmission holds boost between shifts. A car with a manual doesn't have any burbles when you push in the clutch between shifts. So for both cars, the only time you get burbles is when you lift throttle in gear, when keeping the turbo spooled doesn't help anyway.

Real antilag systems that help spool the turbo put a lot of wear on the turbo anyway.

Originally Posted by Torinalth

Overall it looks good but trying to figure out why timing is dipping at 4900 and 5800.

bm3 ver 2.1 Stage 2 93.
https://www.bootmod3.net/log?id=5ed0...90c655ccf3cec6

I wouldn't worry about it. It just looks like random pull to adjust for fuel quality/ignition. If it's the same cylinder over and over, and pulling more than 3*, it'd investigate.

Originally Posted by InstigatorX

Vehicle: 2018 440i GC RWD 8AT
Tune: MG Flasher v2.10 93Oct ST1 + xHP ST2
Fuel: E18 (Tested E85 + 93/E10)
Mods: Injen Evolution CAI
DEC: SPORT+ and then long press DSC button
Gear: 4th

Log 1: https://datazap.me/u/instigatorx/log-1591041703
Log 2: https://datazap.me/u/instigatorx/log-1591041767

Looks pretty good

Originally Posted by Eldotbe

Hey guys, today I fitted the supra pump and also chnaged spark plugs. Am running the BM3 Stage 2+ 93oct map.
Here's the log:
https://datazap.me/u/eldotbe/bm3-sta...og=0&data=3-19

I think it looks pretty good, also looks like a bump in power around 430/440whp from virtual dyno. Anymore input would be appreciated

I don't think that's the right log. It shows MHD in the description and has different log parameters than BM3.

[Eldotbe]

Originally Posted by kern417

I don't think that's the right log. It shows MHD in the description and has different log parameters than BM3.

Yeah I used the MHD logger to log the bm3 map. is that okay or does that effect things? I don't see why it would effect it, other than they log a few different parameters

[kern417]

Originally Posted by Eldotbe

Yeah I used the MHD logger to log the bm3 map. is that okay or does that effect things? I don't see why it would effect it, other than they log a few different parameters

gotcha, I forgot you said that in another post. I guess it's probably fine. I can't see how it would interfere, but I would add some target parameters for boost and timing.

It doesn't look horrible. Boost seems very high compared to other stg 2+ logs I've seen, but it may be due to your ambient conditions. The only thing I'm not sure about is why there's so much timing pull after the shift. Cyl 1 & 2 barely clear 2*. You may have had a slip in traction or gone over a bridge transition or something that caused traction control to kick in? I know sometimes at speed a small pothole quickly beomes a small ramp.

[Supr3me]

New logs for Pure800 E50 rev 1.2

https://datazap.me/u/tnilson/e50-pur...og=0&data=4-24

Timing corrections are basically zero this time around. Only thing I did differently was intentionally waited a couple days of spirited in town driving for the ECU to adapt. Can't be positive that's what made the difference but for others if you're getting timing corrections, see if it makes a difference to wait before doing your logs on the new map.

[Torinalth]

Originally Posted by kern417

I wouldn't worry about it. It just looks like random pull to adjust for fuel quality/ignition. If it's the same cylinder over and over, and pulling more than 3*, it'd investigate.

its dropping 3*, always at 4900 rpm, always cylinder 1. occasionally cylinder 4 at 5800 also 3*. going to log again tonight and see if it continues, several fuel tanks since last log to see if it was the fuel. not terribly worried, but 2, 3, 5, 6 are always good, just cylinder 1 and sometimes 4 pulling at same time.

[OzBMR]

Originally Posted by Sµpreme

New logs for Pure800 E50 rev 1.2

https://datazap.me/u/tnilson/e50-pur...og=0&data=4-24

Timing corrections are basically zero this time around. Only thing I did differently was intentionally waited a couple days of spirited in town driving for the ECU to adapt. Can't be positive that's what made the difference but for others if you're getting timing corrections, see if it makes a difference to wait before doing your logs on the new map.

That looks like a really nice tune and power level that you wouldn't/shouldn't stress about. They have the torque coming in smoothly and peaking around 5000 RPM.

You have at least the same or better torque than your last stock turbo tune up to 4000 RPM, then the Pure800 dominates.

Add this to your to do list...buy a Dragy

[Supr3me]

Originally Posted by OzBMR

.

Add this to your to do list...buy a Dragy

I need to!! And a radar detector 🤔