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IF Bms can respond; will this work with highflow cats (Gesi)?...can Cel, if it appears be turned off? I read earlier that this piggyback cant turn it off even if running cats in place... is this true?
IF Bms can respond; will this work with highflow cats (Gesi)?...can Cel, if it appears be turned off? I read earlier that this piggyback cant turn it off even if running cats in place... is this true?
It depends where you live. The JB4 interface detects your country and will block anything like that within the USA as it's illegal. Outside the USA, the passive delete option is enabled that you can use to clear the CEL automatically.
Im in the US, so even though these cats pass emissions and are legal, turning off the cel is illegal? Is this something specific to the Burger tune or something new Nationwide? I know the Renntech tune I was considering turns the cel off last time I checked with them 2 weeks ago.
Im in the US, so even though these cats pass emissions and are legal, turning off the cel is illegal? Is this something specific to the Burger tune or something new Nationwide? I know the Renntech tune I was considering turns the cel off last time I checked with them 2 weeks ago.
It's illegal anywhere in the USA, any tuners offering such an option do so at their own peril, due to heavy fines by the EPA sweeping across the industry.
Actually we've found the C63 to be generally under timed from the factory, and when on E85 mixtures or higher octane we're working on ways to increase timing advance above normal levels for more power.
This is our most recent dyno run and log to go with it:
Thanks for taking some time to respond brotha!
Glad to hear we will be able to run e mixtures as they worked well for optimal timing advance with my Audi (b8 s4). The latest dyno chart you attached looks really good, but if I’m reading your log right afr and boost seems to be solid and iats actually dropped for a bit before climbing and dropping back down. Only issue I see is timing starts at 1* and tops out at 11*!? That can’t be right, can it? We were able to stuff 20+ degrees in the direct injected blown s4 on e85 blends and my 1kwhp blown mustang eats 21* of advance, granted full e85, but that is like no timing at all, literally lol. Why is the Oem advance so pitiful?
Glad to hear we will be able to run e mixtures as they worked well for optimal timing advance with my Audi (b8 s4). The latest dyno chart you attached looks really good, but if I’m reading your log right afr and boost seems to be solid and iats actually dropped for a bit before climbing and dropping back down. Only issue I see is timing starts at 1* and tops out at 11*!? That can’t be right, can it? We were able to stuff 20+ degrees in the direct injected blown s4 on e85 blends and my 1kwhp blown mustang eats 21* of advance, granted full e85, but that is like no timing at all, literally lol. Why is the Oem advance so pitiful?
It's a tighter combustion chamber so takes less timing. Can't really compare those things platform to platform as they vary wildly.
That may have been true years ago but these days our harnesses are top notch and backed by a 5 year warranty. Made in the USA, all connectors are authentic German or USA made. No split-loom coverings. Enclosures for the MB platform are CNC machined aluminum. It's true that years ago those E series BMW PWG vehicles with first generation harnesses had a heat issue on the boost solenoid connector which we resolved. Dinan never had this issue, because they never bothered to connect their tuner to the boost connector, and were happy to deliver sub-par tuning results to their customers to save a few bucks.
Indeed, I can see the difference in the pic posted. The connectors and loom are much nicer now. My statement was based off memory from when Dinan was in their second run of the F series Dinantronics. I remember holding it side by side with the JB4 (circa 2015 if I recall correctly) and seeing the difference. Looking at the above, there does not appear to be a quality difference any longer.
Indeed, I can see the difference in the pic posted. The connectors and loom are much nicer now. My statement was based off memory from when Dinan was in their second run of the F series Dinantronics. I remember holding it side by side with the JB4 (circa 2015 if I recall correctly) and seeing the difference. Looking at the above, there does not appear to be a quality difference any longer.
I'm thinking low 140's maybe 145 in the half. Could be wrong just a guess.
I’ve run 144-145 in the 1/2 with only secondary cat delete & low profile performance air filters so I hope it’s higher that that 😁 (I’ve also run mid 11’s at 121-123)
I’ve run 144-145 in the 1/2 with only secondary cat delete & low profile performance air filters so I hope it’s higher that that 😁 (I’ve also run mid 11’s at 121-123)
No no you're right I was just looking at some other cars now should be actually mid to high 150s I hope. I just saw that a 2015 M4 with the jb4 ran 156.
I know this is probably a bit premature to ask, but could I use JB4 with upgraded turbos? I’m not looking to extract every last bit of power, just something conservative on pump gas and stock downpipes that doesn’t taper off at higher RPMs. I’d like to avoid a bench flash, so if JB4 could handle it that would be awesome.
I know this is probably a bit premature to ask, but could I use JB4 with upgraded turbos? I’m not looking to extract every last bit of power, just something conservative on pump gas and stock downpipes that doesn’t taper off at higher RPMs. I’d like to avoid a bench flash, so if JB4 could handle it that would be awesome.
Why do you want to avoid the bench flash? Warranty?
Why do you want to avoid the bench flash? Warranty?
Mostly because I don’t want catless downpipes so it seems lIke JB4’s adjustability would work with a mild upgraded turbo setup (600 whp on pump gas). I know theoretically bolting on upgraded turbos will yield some gains on stock software, so it seems a JB4 could handle it as an adjustable piggyback.
I also like JB4’s map switching and data logging. I want to be able to datalog and see exactly what’s going on with boost/timing/afr.
Glad to hear we will be able to run e mixtures as they worked well for optimal timing advance with my Audi (b8 s4). The latest dyno chart you attached looks really good, but if I’m reading your log right afr and boost seems to be solid and iats actually dropped for a bit before climbing and dropping back down. Only issue I see is timing starts at 1* and tops out at 11*!? That can’t be right, can it? We were able to stuff 20+ degrees in the direct injected blown s4 on e85 blends and my 1kwhp blown mustang eats 21* of advance, granted full e85, but that is like no timing at all, literally lol. Why is the Oem advance so pitiful?
If you were referring to the second log, the lower initial timing and the drop to near zero advance is because the AFR is too lean on E30, even for direct injection. It's over 15 for a good portion on that pull and the timing starts at a much lower target as a result.
If you were referring to the second log, the lower initial timing and the drop to near zero advance is because the AFR is too lean on E30, even for direct injection. It's over 15 for a good portion on that pull and the timing starts at a much lower target as a result.
Good catch. I looked right at afr and didn’t even register it was that lean after initial wot. I’m not sure why it would have a 15:1 target under wot as stoich is a part throttle afr target for good mpg. Even on di afr should drop down to .88 lambda or 13:1ish afr once under full load, especially with decent boost pressure. Maybe BMS can chime in on that why that’s happening...
We got lots of good data at the Shift Sector event. We'll be integrating what we learned into some changes to the prototype mapping. Hit the speed limiter on all the JB4 runs. Map 0 which disables the JB4 ran 11.5mph less at 144.4!
All runs on a mix of about 80% race gas with the BMS intake prototype installed.
Not sure of the event details and if there is just a slow roll-on or what, but the 1/4 mile times look way slow for the mph, right? I’d think those trap speeds would equate to very low 11’s?
10-24-2018, 08:22 PM
