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Nothing wrong with my JB4.
Head over to the Burger Motor Sports forum https://www.n54tech.com/forums/forumdisplay.php?f=38
and check out all the peoples logs. Look at the table within the log ecu psi there are 2 of these for both turbos and you will see 9psi under full load.
My logs are around 12psi due to ecu tune. https://www.n54tech.com/forums/showthread.php?t=59916
The psi can spike when coming off full throttle due to the small blow off valves. Have seen up to 17psi but this is a spike only. The logs will show it all.
Here are the map details for the JB4 Map Guide as of V2 Firmware: Map 0: Stock operation, JB4 disabled Map 1: Default performance map, 4psi peak over stock, taper to redline Map 2: 5psi peak over stock, taper to redline Map 3: 6psi peak over stock, less taper to redline, suggested for E85 mixture or octane booster Map 4: 6.5psi peak boost request over stock, less taper to redline, requires unleaded racing fuel or E85 mixture Map 5: 7psi peak request over stock, less taper to redline, requires unleaded racing fuel or E85 mixture Map 6: Custom additive boost profile, boost request over stock Map 7: Progressive WMI (water/meth) mapping based on boost additive setting and WMI flow Map 8: Low boost VALET / Safety map
Boost pressure from the turbo to the engine has loss due to mechanical and friction losses in the gears, bearings, pipes, exhaust, intake etc. Why do you think a engine with free flowing intake and exhaust will make more power on the same boost.... less loss and restriction.
Yes the turbos might make 17psi but what the actual engine sees is 9psi. Ask any good tuner. On average if the engine is seeing 20psi the inside of the turbo would be seeing 36psi up depending on a lot of factors with some listed above..
Location of the boost sensor within the system has a lot to do with the reading too.
With the JB4 on map 0 it is NOT adding any additional boost, it is fully disengaged so at the boost sensor it's seeing 9psi on wot, on map 5 it adds 7psi so at the sensor it will read 16psi, confirmed by the logs.
Hope this explains things.....
Boost pressure from the turbo to the engine has loss due to mechanical and friction losses in the gears, bearings, pipes, exhaust, intake etc. Why do you think a engine with free flowing intake and exhaust will make more power on the same boost.... less loss and restriction.
Yes the turbos might make 17psi but what the actual engine sees is 9psi. Ask any good tuner. On average if the engine is seeing 20psi the inside of the turbo would be seeing 36psi up depending on a lot of factors with some listed above..
Location of the boost sensor within the system has a lot to do with the reading too.
With the JB4 on map 0 it is NOT adding any additional boost, it is fully disengaged so at the boost sensor it's seeing 9psi on wot, on map 5 it adds 7psi so at the sensor it will read 16psi, confirmed by the logs.
Hope this explains things.....
god...no one talks about this boost. you are jb4 fanboy and activ in n54tech forum, so you should know it.
if these BMW guys Talking about Maps or bigger turbos, they never would say, "im runing around 12psi" their numbers are much higher, around 20-30psi and higher...no matter 35i,m3 oder m5 engine...
if youll hold off about 2 weeks we have a kit coming in the ~$600 price range which will include new inlet tubes, larger piping than BMS, Larger filters than ZAC, and boxed heatshields. We are just waiting for a custom coupler.
if youll hold off about 2 weeks we have a kit coming in the ~$600 price range which will include new inlet tubes, larger piping than BMS, Larger filters than ZAC, and boxed heatshields. We are just waiting for a custom coupler.
if youll hold off about 2 weeks we have a kit coming in the ~$600 price range which will include new inlet tubes, larger piping than BMS, Larger filters than ZAC, and boxed heatshields. We are just waiting for a custom coupler.
im not in a giant hurry. Ill check your IG
What about the amg builder plaque?
This was just a test fit of our U tubes, But we have heat shields (waiting for ceramic coating), and inlet tubes, with custom adapters for both stock and Aftermarket intakes, We will have a CF option aswell as aluminum, also you will be able to use any filter you want with a 3" inlet with our custom sensor bungs, Just drill a hole and pop our bung in. We will offer heat shielded and unshielded options. We sampled the inlet tubes on an IG story, once they are wrapped up we will make a more formal post. We have a slew of new M177 products, We will get the intakes on the dyno asap once the heat shields show up!
I'll apologize up front. I'm sure these will perform. But they are just like the BMS units - ugly. My opinion and I know what they say about opinions.
Haha I sort of see your point about VRP's, I was actually hoping I would look similar to BMS.
I personally do not mind the look of BMS intake, looks very nice to me, I would have loved if 1. it had a flat indented spot for engine name builder plate, and 2. did not have BMS on the heatshield.
here's my 2 cents worth... I've got the Zac Intakes. Look cool, sound cool but do they make any real difference to HP. No. Ive dynoed them and have results before and after. Nothing. For $2k the hassle I went through in fitting them was a royal pain in the ***. Gave feedback to Greg on fitment only to be told I have no idea and he is the best on the market and everyone copies him blah blah blah.
but **** me $4.8k AUD. Better results paying for good downpipes and having them ceramic coated and ECU/TCU tune.
at the end of the day, I totally agree that breathing nice cooler air into the turbos is the way to go but all the ones on the market currently, which all copy each other, except Eventuri, make no real noticeable gains, period.
But, if you have the cash, want a cool looking bay and a spool up noise, go the open air intakes like the ZAC. Just done expect HP gain... it's all show at the end of the day...
here's my 2 cents worth... I've got the Zac Intakes. Look cool, sound cool but do they make any real difference to HP. No. Ive dynoed them and have results before and after. Nothing. For $2k the hassle I went through in fitting them was a royal pain in the ***. Gave feedback to Greg on fitment only to be told I have no idea and he is the best on the market and everyone copies him blah blah blah.
but **** me $4.8k AUD. Better results paying for good downpipes and having them ceramic coated and ECU/TCU tune.
at the end of the day, I totally agree that breathing nice cooler air into the turbos is the way to go but all the ones on the market currently, which all copy each other, except Eventuri, make no real noticeable gains, period.
But, if you have the cash, want a cool looking bay and a spool up noise, go the open air intakes like the ZAC. Just done expect HP gain... it's all show at the end of the day...
I respectfully disagree, it is not truthful to say every other company aside from XYZ does not provide gains. Our design has been tested internally and with users (on this forum) and has shown time and time again to improve 60-130mph times and increase power. We use in house ANSYS FLUENT CFD conducted by a simulation expert to create and organic flow profile that optimizes the fluid path. Additionally, our heat shields have a reflective thermal barrier and a sealed top to prevent hot air from entering the filter element.
01-29-2020, 01:56 PM
their numbers are much higher, around 20-30psi and higher...no matter 35i,m3 oder m5 engine...
