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Its still pretty new so there's not a lot of info on it but yes it works. Jesse said he's done some cars on it. I haven't. It is for locked ecu cars and uses the JB4 port injection controller add on. No idea if its a waste of money. I imagine that you can integrate the PI system with a flash...

People want what they want ?‍♂️ The few BEF people I've worked with liked tweaking the JB4 on their own and not waiting weeks/months between flash revisions. It's just simplified tuning for DIY. Gonna end up at roughly the same power levels anyway. @Phantomx did ~490whp on E40 with more power...

He is talking about an MHD Backend flash (BEF) for JB4. It is a flash tune intended to be used with a JB4 in combination. Gives additional fueling, lower lambda, etc but lets the JB4 handle boost control with its PIDs/etc. It does work quite well and easily meets or exceeds power figures of OTS...

They definitely take more work than an AT car to dial in, but I have seen enough at this point to know what gets them sorted out. There are at least 5 members here who have had their MT tuned by me, maybe more. Also my own car which has been perfectly dialed in for 6+ months. I figured out the...

Makes sense, that is what I figured. Yeah the difference between all the cars I see is crazy.... even with supposedly the same mods, fuel, IATs. There are some patterns, and its pretty rare I see something I haven't seen before. I typically tune cars on JB4 to maintain similar cylinder fill%...

EOS one is a 8/10 fit, 9/10 carbon imo. Cheapest I found too. One end is just barely lifted up to see the command tape underneath. Hardly noticeable.

Thanks for sharing. I have seen these tables on the ecutek guide I shared earlier. To me, it still looks like base timing drops as relative filling % goes up. That is just cylinder fill right? And cylinder fill % is directly correlated to boost, and in the case of the JB4, that is ecu_psi. So...

Correct.

I personally don't plan on it. Being an MT, I'm not chasing 60-130 times or 1/4 mi. Pretty happy to be around 440-460whp right now. I know that BMS has a big turbo PI JB4 M340 with over 800whp though.

No problem! Try with FF set at 40 next. Brings the whole boost curve down a bit. Manage the throttle closures.

I would just tune for E blend right away honestly. Usually it is best to select your boost targets before doing WGDC tuning. I recommend starting at E25 blend. This person typically mixed 2 gallons in, but I will confirm that its the same with this tank of fuel. 91 with 2 gal E should not have...

That's a viable theory. Notice there are 2 logs in my link. The second is with an E blend and no improvement whatsoever with timing. I think it is because cylinder fill % is just too high.

470whp won't happen on stock turbo on 93. bigger turbo or ethanol/meth are only options. As @bushido said, ~440whp is realistic, but completely dyno dependent.

@i3igpete The tricky part of this WGDC tuning is that, unfortunately, there is usually more to it than syncing up the FF/WGDC curves. Remember that the B58 is torque targeting, so when FF is too high, sometimes the car will just take the extra boost, consider it as cylinder overfill and reduce...

duty_15 duty_20 duty_25 duty_30 duty_35 duty_40 duty_45 duty_50 duty_55 duty_60 duty_65 duty_70 32 32 32 32 35 36 39 48 55 57 62 62 FF= 35~40 ballpark ;) But its good to see the process as a demonstration catless and hi flow dp cars have a big drop off of duty under 5k typically.

Its not bad, but boost curve is kinda weird. WGDC tuning likely needed. What downpipe on the car?

probably not, BMS has done it. I remember seeing that it does take some effort to dial in though

Nice deal. I thought I was lucky to walk out under 60 OTD (barely). ?

Yeah its fine, especially with AA dp. your throttle will manage the extra "unexpected" boost from the freer flow.

The whole point of the JB4 is that it intercepts the pressure sensors to trick the car into thinking there's less boost than there actually is. The car's ECU never sees anything outside of factory parameters, so no, its not detectable when removed. It retains factory safety parameters and adds...