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02-13-2011, 09:47 PM | #1 |
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JB4 and DCI Installed on 35IS
Install for the cones took about 30mins. The JB4 took about 1 hour and 30 minutes. Probably more because this was my first time. I have to say the Z4 is a lot easier than the 335 video as the ECU is easily accesible.
I was only able to drive the car once but it was a rush. Burger Tuning says it takes a few runs for the ECU to adjust 100% so we will see how it is by the end of the week. Adjusting maps on the fly is a cool feature. My car is not modified so I really can only flip from map 0 and map 1. I'd like to try map 2 but it sounds like you need downpipes. I am also running on snow tires right now so I don't want to shred them. Cheers. |
02-13-2011, 10:11 PM | #3 | |
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Is there any difference? The reason I ask is because Dinan's numbers were slightly different and for some reason he doesn't offer a Stage III for the 35is. I just wonder if BMWs tweaking the ECU for the 35is has an impact.
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Last edited by teagueAMX; 02-14-2011 at 11:59 PM.. |
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02-14-2011, 05:55 PM | #4 |
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The JB4 OVERRIDES the stock ECU programming - it is a Piggyback system. So it doesnt matter if you have a 35i or 35is.
Now on map 1 there isn't a HUGE difference between the stock 340HP and the JB4 tune which I estimate provides around 350-360HP at the engine PEAK....maybe around what 330RWHP. The JB4 on map1 targets around 13psi, which is basically what the 35is targets in the midrange then tapers off significantly to redline. This is where the JB4 will make the most difference. One other thing - I would be wary of running high boost/torque on the DCT transmission... How do the DCI's sound mated with the Z4+ DCT? I only ever use them on a manual 135i. Last edited by Alext; 02-14-2011 at 06:02 PM.. |
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02-14-2011, 08:07 PM | #5 |
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The GETRAG Powershift® 7DCI600 Transmission that BMW uses for our cars has a Torque Capacity of 600 Nm so it wont be a problem running high boost especially on the stock turbos.
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02-14-2011, 08:39 PM | #6 |
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Yes this is correct. It is apparently rated at 600nm, but perhaps I should have made myself more clear - the reason why I said to be 'wary' was that not many have really tested the fragility/limits of the DCT day-to-day in the real world (at least that I have personally read about)...I would actually like to see some examples of real world testing on high boosted DCT applications that are exceeding the 600nm rating.
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02-14-2011, 09:15 PM | #7 |
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I dont think you will find alot of cars out there exceeding 550/570nm. Most (stage2) tunes for our car wont give you more than 530 to 550nm (on stock turbos that is). So talking about 600nm would be talking about upgraded turbos and pushing close to 19/20psi (thats the max PSI you can go, limited by the fueling system of the N54). Getrac has rated the transmission to 600nm max always being conservative for everyday applications just like all OEM manufacturers, tuners have stated that this transmission is good for about of 700nm of Torque. Now if you're talking about Nitrous then its a different topic but we ARE talking about the JB4 and average dyno numbers on 15.5 with that specific tune, with 92 Octane fuel Full bolt on's and meth give around 430nm of Torque which is more than safe and thats directly quoted by a dynograph from Burger Motorsports JB4 equipped N54 car
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Last edited by Constant.S; 02-14-2011 at 09:25 PM.. |
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02-17-2011, 01:30 AM | #8 |
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Actually I emailed Getrag three days ago because I've been hearing conflicting numbers about the DCT's torque capacity. I was told that the DCT gearbox used in the sDrive35i has a torque capacity of 500Nm.
Where did you get your 600Nm figure from? |
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02-17-2011, 02:47 AM | #9 | |
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Just the official website and the product data and my BMW mechanic, take a look at the specs and Max torque capacity. Except if they are lying on their website that is.
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Last edited by Constant.S; 02-17-2011 at 03:03 AM.. |
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02-21-2011, 06:05 AM | #10 |
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Will you be keen to do some data log on your car with the jb4? I'm interested to see what kind of difference the same car with different mods will have.
On running the dct gearbox with more power, I'm not worried for the dct gearbox at all, been running close to 19psi for the longest while without any issue. I I'll be very concerned especially when it comes to doing launching through. Anyone that followed my other thread will hear how I broke the rear shaft and prod shaft bearings. I will be ordering the rob beck bigger turbos and will report how the car takes it . |
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02-27-2011, 12:48 PM | #11 | |
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06-24-2011, 01:54 AM | #13 |
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07-08-2016, 11:30 AM | #14 |
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Sorry to bring a thread back from the dead but figured easier/better than creating a new one. That said, first, I am just starting to research and I am considering the JB4. In reading your comment and seeing the install guide for the 335 now I am curious, where is our ECU located?
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07-09-2016, 03:27 AM | #15 | |
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07-09-2016, 02:51 PM | #16 | |
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It all comes down to your choice of tuning platform and tuner Tuners who state this are tuners who have issue preventing the DCT from slipping after that and then throw the towel in an call it a hardware limitation rather the tuner or tuning platform fault which subsequently your DCT starts having real problems |
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07-09-2016, 06:33 PM | #17 | |
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I am open to your opinion but to say "this sucks" without further explanation doesn't tell me anything. What are you running on your car since I assume it's not the JB4? How's it going? Have you ever run the JB4? |
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07-11-2016, 05:57 PM | #19 | |
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07-11-2016, 06:26 PM | #20 |
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I still don't see proof that the product sucks. Head on over to n54tech or "that other - bimmer - forum that shall not - boost - be named" and take a look, almost no one supports your position. I don't have one, but will be purchasing one in the near future.
Logs on someone else's car don't prove your point.... |
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07-11-2016, 09:48 PM | #21 | |
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2009 Z4 DCT - Hexon RR600, MMP Inlets/Outlets, Wagner EVO 2 Comp FMIC, Fuel-It TBI, Fuel-It Stage 2 LPFP, ER CP, Forge DVs, N20 TMAP, BQ Tune 93/E65, BMS DCI, AR Catless DPs, BMS OCC, RB PVC
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07-12-2016, 04:11 AM | #22 | ||
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These couple guys here sound like somebody must teach every single information about piggyback tunes. I am not even sure if they aware of what tables JB4 controls, and it doesn't support DCT without backend flash. I want to see these couple of them run JB4 and come back to find if anyone selling used tranny lol
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