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Yeah I thought about it for a little bit, in order to use it at high loads you basically need to oversize your injectors AND rail pressure in order to intentionally create (for lack of a better word) fuel puddling. The fact that everyone goes port injection tells me that the DI injectors are not...

This kind of leads back to my related question about boost control levers. Can the DME advance spark past the "ideal" ignition table? Or is it retard-only? Back in undergrad combustion class I remember they were talking about this new fangled thing called Direct injection. Stratified charge...

93 octane with E10 is the usual mix here in Chicago, though I did go to a different station than normal - usually shell/mobil but this time I went to a speedway.

if I'm not mistaken, the afr's are at 14 because that's the default factory fuel map (?). the jb4 has no fuel or ignition control on these cars, correct? so there's really nothing I can do other than turn down the boost. but yeah, the map 4 run was at the request of @ColonelAdama. i was seeing...

out running some errands, was able to get a fourth gear pull with map 4. Haven't taken a look in detail. Side question, is there a more streamlined way to upload directly from the jb4 mobile app to Datazpp? At the moment I'm emailing the file to myself and then upload from my downloads folder...

I think we're on the same wavelength on this part. My idea was once the boost lookup table was mapped out, choose a WGDC vs RPM curve that was slightly below target boost (say, 2-4 psi low). WGDC curve would be picked so that it's below target by a constant amount for all RPMs. Then use FF...

Hey Adam, I liked your DOE approach in the 6MT thread and was going to attempt a step-by-step approach to this. two questions before I start: can the JB4 completely override the dme wastegate signal when using absolute modes, or does it only modify the dme signal? can the PID response get...

Update, mystery solved I think. Might as well keep the thread up for someone else that is curious. I found a log from someone using additive map 2, they also show a flat value of 4 psi for target boost: https://datazap.me/u/kaj750/oct-1-e30-map2?log=0&data=1-3-9-11-23-34 Meanwhile, someone...

Installed a used JB4 and the first thing I did was update firmware to latest stable. For some reason, boost target is always clipping at 3 psi during the entire drive cycle in map 1. This was strange because looking at other people's JB4 logs (mostly absolute maps, map 4 or 6) target boost is...

Looking at your logs i'm not really seeing any smoking gun. During your drive with the BMS charge pipe, the ECU requested non-zero boost only 3 times, only one of which was part throttle and the other were WOT. Manifold boost was more than 3 psi off from target. However, the MHD CTS log...

sweet! I'll order an sb1010s and compare it to the OEM one. Hopefully the 2mm extra length is on the nipple side and won't cause it to bottom out prematurely.

update: Looks like the Russell website works for the 2020 model year but none of the newer ones h9412 , still need the actual size though

Does anyone have specs on bleeder screw thread and length? Not really finding much, and even searching for 2020-ish Z4 doesn't have any hits either, at least on the Russell website.

i used the double wide bracket suggested here and used the grounding stud. will need to hog out the hole a tiny bit with a drill. orient the bracket at a slight downward angle (about 20 degrees) and you should be able to mount the jb4 without making contact with the firewall or the rain cover...

possibly dumb question. do we have control of the DI injection rate profiles in ecutek?

this was his routing if I'm not mistaken another member routed the plug to the windshield squirter hose. I did something similar but I'm not 100% sure if it will stay there. https://www.supramkv.com/threads/battery-charger-placement.2896/post-246249

ah, i was going off this video (jump to 3:00 mark). i guess what is the point of doing this without the bimmerlink atep? edit, so now I'm watching this bimmerlink video and it looks like the inputs are identical (jump to 12:20). am I missing something?

if we get the li-ion/li-po battery, what's the correct setting in bimmercode?

at the end of the day, if you install the stiffest spring so that it never opens, you're basically back at the stock configuration anyway...

Lithium-based batteries actually prefer heat. so PowerTex or OP's battery might do the trick. https://www.osti.gov/pages/servlets/purl/1474853 Charging a battery while overheated or overcooled both accelerate aging. However, overheated charging is the lesser of two evils (note the inverted...