View Single Post
      11-14-2012, 12:27 PM   #54
Mike@N54Tuning.com
BimmerPost Supporting Vendor
Canada
480
Rep
15,045
Posts


 
Drives: 07335i
Join Date: Dec 2008
Location: Earth

iTrader: (88)

Quote:
Originally Posted by bmw335idizzle View Post
Question... I've been searching all over but I can't find it. People who run jb4 G5 and using ethanol mix likes to do the Cobb/bms reflash, where the heek to I find this?!?! Lol also is the Cobb flash with jb4 g5 iso just as good as Vishnu rev 3 with flex fuel kit and reflash?
The difference is BMS doesn't use a "flex fuel" sensor. Which means you don't need to cut or work with fuel lines (introducing possible fuel leaks) to install it. From their perspective a flex fuel sensor is an unnecessary complication when you can use auto learning strategies (monitoring advance and fuel trims) to get the same basic information. The drawback with the BMS approach comes during extreme changes in ethanol content. Like if you accidentally put in 91 octane instead of 100% E85 AND forget to reset the auto learning (which takes 3 seconds in dash) you may pickup some engine knock the first time you stomp on it until the learning algorithm realizes the fuel has changed.

On the tuning end if using more than 40-50% E85 they suggest their flash along with the JB4. You load the BMS flash at home in your driveway. You do not need to remove and ship around your DME. When going in for warranty work you can also unload it from your driveway. When new maps and tricks are made you again can load them in your driveway without shipping things around and having down time with the car. Simple. Plus, the device they use for the BMS flash maps, the Cobb AP, has a killer resale value if you ever sell the car.

Mike
__________________
LOWEST PRICE GURANTEE ON ALL PRODUCTS - www.n54tuning.com - Email; Mike@n54tuning.com
NEW PERFORMANCE LINE N54 DOWNPIPES & M3/M4 & F30 ER DOWNPIPES NOW IN STOCK - ER N54 CHARPE PIPE SPECIALS - NEW JB4 G5 ISO for N54 and F30 N55 ON SALE - NEW S55 M3/M4 JB4 NOW SHIPPING