[Bimmer28312]

Officially going with Dinan as well. install happening next week if there isn't any delay in turbos.

[Bimmer28312]

Dinan, when we come in for the install is there any issue with having jb4 left on map 0? Zero is the stock map

[Dinan_Engineering]

Originally Posted by Bimmer28312

Dinan, when we come in for the install is there any issue with having jb4 left on map 0? Zero is the stock map

I take it you will be using the JB4 as the boost controller than?

Assuming that's the case I wouldn't see why setting it to map 0 wouldn't be fine but I don't work with the Burger stuff so I'm not the best person to ask.

[Bimmer28312]

Originally Posted by Dinan_Engineering

I take it you will be using the JB4 as the boost controller than?

Assuming that's the case I wouldn't see why setting it to map 0 wouldn't be fine but I don't work with the Burger stuff so I'm not the best person to ask.

Reason why I'm asking is I wasn't sure if it would interfere with the installation of the Dinan tune.

[aichixiaotudou]

wow,this looks really good,hoping to get one!but that is really much more expensive,i got to work harder

[SeanWRT]

Originally Posted by Dinan_Engineering

The pump in question is an in tank LPFP replacement / modification (depending on which option you choose). Not a HPFP.

To my knowledge, it's always the HPFP that fails first. Probably I am missing something, but under what scenario can a upgraded LPFP help? I am putting all together the "safe bits" that I can think of before I pull the trigger on your turbo kit.

This is my experience: all of my three flash tuned (with DP) m2 buddies saw their HPFP gave up at 18psi@5000~5500rpm on RON98. We suspect it has something to do with tune, because HPFPs are holding fine with JB4 @map2(+6 psi, not a good map for stock turbo for sure) and those JB4 boosted m2 are pulling really strong (in 9.0~9.2s from 100-200KPH, consistently).

My concern is not only on the pump capacity, but the fuel mixture trim correction as well, which is one of the highlighted feature from Dinantronics' marketing material. Says it's within factory spec, so along with timing control (care to explain how?) the ECU is not fighting itself with conflicted signal for the car to run smooth and strong. At 20+psi, my buddies' m2s with JB4 probably ran very lean all the time (they didn't log, unfortunately), which is the very reason, to our limited knowledge, why HPFP can hold up, as opposed to the failure we saw with flash tune. I reckoned Dinantronics Stage 4 sets target at 20+psi at higher rpm (equivalent to JB4 map2 +6) too. Does the HPFP not fail because our engine runs just as lean? Are the corrections kept within "factory spec" as advertised with all the Dinantronics?

I am located the other side of Pacific. Apparently there is no warranty, should I be your customer. I cannot afford to have problems

[SeanWRT]

Duplicated, delete

[Dinan_Engineering]

Originally Posted by Bimmer28312

Reason why I'm asking is I wasn't sure if it would interfere with the installation of the Dinan tune.

Physically it would not interfere as they plug into different areas (JB4 direct to sensors, Dinan directly to the DME) but you would not want to run them together. You are asking for trouble doing that. Piggybacking a piggyback essentially is what bad dreams are made of.

Originally Posted by SeanWRT

To my knowledge, it's always the HPFP that fails first. Probably I am missing something, but under what scenario can a upgraded LPFP help? I am putting all together the "safe bits" that I can think of before I pull the trigger on your turbo kit.

This is my experience: all of my three flash tuned (with DP) m2 buddies saw their HPFP gave up at 18psi@5000~5500rpm on RON98. We suspect it has something to do with tune, because HPFPs are holding fine with JB4 @map2(+6 psi, not a good map for stock turbo for sure) and those JB4 boosted m2 are pulling really strong (in 9.0~9.2s from 100-200KPH, consistently).

My concern is not only on the pump capacity, but the fuel mixture trim correction as well, which is one of the highlighted feature from Dinantronics' marketing material. Says it's within factory spec, so along with timing control (care to explain how?) the ECU is not fighting itself with conflicted signal for the car to run smooth and strong. At 20+psi, my buddies' m2s with JB4 probably ran very lean all the time (they didn't log, unfortunately), which is the very reason, to our limited knowledge, why HPFP can hold up, as opposed to the failure we saw with flash tune. I reckoned Dinantronics Stage 4 sets target at 20+psi at higher rpm (equivalent to JB4 map2 +6) too. Does the HPFP not fail because our engine runs just as lean? Are the corrections kept within "factory spec" as advertised with all the Dinantronics?

I am located the other side of Pacific. Apparently there is no warranty, should I be your customer. I cannot afford to have problems

The LPFP has nothing to do with upgrading a part prone to failure or safety for that matter per se... its a modification for performance under certain conditions.

Can't explain it much better then the website does.... "With increased power comes increased demand on the fueling system to satiate that demand. The stock fuel pump is incapable of delivering consistent fuel flow at low fuel tank levels for high output applications under heavy load resulting in the possibility of inconsistent power delivery when the car is pushed. Dinan's upgraded fuel pump enhances the pump's ability to draw fuel, and allows full flow of fuel to the engine during high demand operation."

The only cars we have had fuel pump issues with in our testing on the current generation cars are the big V8's --- specifically when running the upper levels of power such as you would have with big turbos. Partly the reason you dont see big turbo offerings from Dinan on those cars. In order to get the car to run right and safely it requires an extensive overhaul of the fueling system that just isnt practical (read: its ridiculously expensive). On the smaller cars we have seen no issues with our tuning to the pumps and they run within factory spec.

[SeanWRT]

Thanks Dinan for the prompt response and good support as always. I am surprised till this day nobody in the market has offered a HPFP replacement for N55 platform...though I take it it's still in question if that's really in need.

I have one more question - what difference will it make, except a minimal turbo lag, running your big turbo on stock tune? The question seems weird but actually it's not, because:
1) When selling the modded car, we don't have to hassle with swapping back stock turbo.
2) Below is a comparison graph and data logs from Burger house of B58 with Pure S1 turbo, a Dinan turbo equivalence, between on STOCK tune and on JB4 at 23psi up top.

Forget about jb4@23psi, I am just shocked seeing a 30+WHP gains (it was 330WHP bone stock on BMS dynoject) from a bigger turbo on stock tune@15psi. To my limited knowledge, I can only attribute that 30WHP to turbo working at a better efficiency zone. And a better efficiency zone is what N55B30T0, identically boosted as B58, has been yarning for - hasn't everybody been saying N55 turbo at 15-16psi is working on the edge of its "efficiency zone"? I've also attached a graph comparing N55B30T0 vs. B58, that another member posted a few days back, where the duo puts down very identical numbers. If Burger's test on B58 is true, does it make sense to expect similar, if not more gains on N55B30T0 with a slightly bigger turbo on stock tune? If you have dynoed it already, please let us know. If not, would you please do it for us? Potentially it would be adding to the marketing material of Dinan big turbo (not sold as a part of package) if the result is good.

[Jadar]

Originally Posted by Dinan_Engineering

Adjusted in the car after install. Need to re-sync them basically. Without that procedure done the car will throw codes all the time.

What kind of codes does it throw?

[Dinan_Engineering]

Originally Posted by SeanWRT

Thanks Dinan for the prompt response and good support as always. I am surprised till this day nobody in the market has offered a HPFP replacement for N55 platform...though I take it it's still in question if that's really in need.

I have one more question - what difference will it make, except a minimal turbo lag, running your big turbo on stock tune? The question seems weird but actually it's not, because:
1) When selling the modded car, we don't have to hassle with swapping back stock turbo.
2) Below is a comparison graph and data logs from Burger house of B58 with Pure S1 turbo, a Dinan turbo equivalence, between on STOCK tune and on JB4 at 23psi up top.

Forget about jb4@23psi, I am just shocked seeing a 30+WHP gains (it was 330WHP bone stock on BMS dynoject) from a bigger turbo on stock tune@15psi. To my limited knowledge, I can only attribute that 30WHP to turbo working at a better efficiency zone. And a better efficiency zone is what N55B30T0, identically boosted as B58, has been yarning for - hasn't everybody been saying N55 turbo at 15-16psi is working on the edge of its "efficiency zone"? I've also attached a graph comparing N55B30T0 vs. B58, that another member posted a few days back, where the duo puts down very identical numbers. If Burger's test on B58 is true, does it make sense to expect similar, if not more gains on N55B30T0 with a slightly bigger turbo on stock tune? If you have dynoed it already, please let us know. If not, would you please do it for us? Potentially it would be adding to the marketing material of Dinan big turbo (not sold as a part of package) if the result is good.

Big turbo with stock tune give you some lag and that's about the full list of features and benefits. The power gain from what I was told on the turbo itself with no tuning was marginal (~5-10 HP). If you are not tuning for it don't bother with the big turbo... at least on the N55 engine with a stage 1 turbo. B58 and a stage 2 turbo or some combination therein may perform differently.

Originally Posted by Dejan_

What kind of codes does it throw?

Wastegate learning limit codes namely. But it leads to other codes down stream as a result as well.

[MGF80]

Update!!

I stopped by Rich's house after he got the car back from Thompson yesterday and he was kind enough to let me drive his M2 out.

We drove the M2 around a bit to get the car up to temp. Normal driving is basically just that. You can't tell the car has a larger turbo or has been modified in any way besides the sound of the awesome Akrapovic exhaust!!! Once we started doing some pulls you do notice a bit of lag but it is easily forgotten once the turbo fully spooled. The car has Pirelli Sottozero's on it so traction was definitely not in our favor. There is a bit more noticeable low end torque but I feel the tune really shines in the mid range and top end. The top end power almost seems endless. Like most Dinan tuned cars I have driven the power is very smooth and you do not feel any flat spots in the power delivery. The car should have came this way in my opinion. I can't wait to drive the car with the Michelin Cup 2's back on.

Now I must say I am not a big fan of the N55 but BMW / Dinan really did a great job with this car. I was talking with him about his overall thoughts on the upgrade and he is very satisfied. The car is by no means maxed out of power but it has more then enough usable power for the every day driver! I was impressed overall, the car is a blast to drive!

[omasou]

Originally Posted by AWF80

Update!!

...Once we started doing some pulls you do notice a bit of lag...

if you come in hot to a turn, downshift, then attempt to pull out of the turn...is there lag?

[MGF80]

Originally Posted by omasou

if you come in hot to a turn, downshift, then pull out of the turn...is there lag?

We didn't really push the car much through turns since the roads were wet and the car has snows on it so I can't say for sure. I would imagine as long as the rpm's were high enough after the downshift you wouldn't feel any lag pulling out of the turn.

[No Boost]

How does it feel compared to a stock M3?

[omasou]

Originally Posted by AWF80

We didn't really push the car much through turns since the roads were wet and the car has snows on it so I can't say for sure. I would imagine as long as the rpm's were high enough after the downshift you wouldn't feel any lag pulling out of the turn.

Live nearby and yes the weather has been less than stellar. Thank you for the input.

What I really love about the M2 is that you cannot tell (at least I cannot so far) that it is compressed. BMW did a great job making the car feel like a NA car.

[Rock Sweden]

I'm curious about future development of the M2. Will there be other stages? Maybe something between 1 & 4 or a stage 5.

[MGF80]

Originally Posted by Stage IV

How does it feel compared to a stock M3?

I think its safe to say a stage 4 M2 and a competition tuned M3 would be a close race! It might even edge it out. The car definitely feels faster then a non competition M3.

[No Boost]

Originally Posted by AWF80

I think its safe to say a stage 4 M2 and a competition tuned M3 would be a close race! It might even edge it out. The car definitely feels faster then a non competition M3.

Many thanks. For reference, the M3 comp pkg is a 120 mph (DCT) trap car. Unbelievably fast

[Dinan_Engineering]

Originally Posted by Rock Sweden

I'm curious about future development of the M2. Will there be other stages? Maybe something between 1 & 4 or a stage 5.

At present the only other plans for the M2 are camber plates and strut braces to my knowledge.

[omasou]

Originally Posted by Rock Sweden

I'm curious about future development of the M2. Will there be other stages? Maybe something between 1 & 4 or a stage 5.

Guess we'll have to wait to see what BMW does with the CS.

[BruceM]

I'd say that I cannot wait, but of course, as with all things M2, that is exactly what I will be doing. Order is in, but when the system will be in is another question.