03-14-2013, 09:41 PM | #155 | |
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It's $40.00 here. Just waiting on a word back as to stock.
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03-19-2013, 10:42 PM | #156 |
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So how good is aFe Scorcher Module? There seems to be a ton of feedback and manufacture/reseller input about BMS, but not much on Scorcher??? Are there any comparative pros/cons??
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03-19-2013, 10:50 PM | #157 |
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I've had the AFE in my car for 2 months no issues and beat my buddies f30 328i with the BMS stage 1. Takes no more than 5 min to install the AFE. I made the switch over to the BMS, I am selling my AFE for a good price, so I can get my hands on the stage 2 and make some power on C16 race gas and play around with the boost settings.
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03-20-2013, 08:29 AM | #158 | |
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Did your AFE tune have and adjustability, what octane and boost dud it run on?
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03-20-2013, 08:33 AM | #159 |
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The AFE had no adjustments and was running 93 at 17psi.
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03-20-2013, 08:36 AM | #160 |
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There ya go.
4psi stage 1 netted about 8whp more than the default setting, which is 25% more than the 3psi dyno. So my guess is your race done over would be A dead heat.
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03-20-2013, 08:40 AM | #161 |
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we may never find out as I have switched over to the BMS
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03-20-2013, 08:44 AM | #162 |
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I know, you will be a great person to report back. But make sure you try both 3 and 4psi.
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03-20-2013, 10:04 AM | #164 |
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As long as you have the fuel to support it(C16 I think is +6psi), hell yeah!
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03-20-2013, 03:13 PM | #166 |
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Diminishing returns, depending on the gas used? Mike/BMS recommend the +1psi boost over S1 default with pump gas, but going as high as +6psi with E85 and 91AKI pump mix - calling it an E40.
Best power & torque results so far with the gas mix. The adventure continues.
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03-20-2013, 03:23 PM | #167 |
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I have 10 gallons left of c16 from tuning my Evo, you will be amazed on the power you can make with this stuff.
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04-14-2013, 01:10 AM | #168 |
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Questioning BMS tune
Guys I am very new to this forum and have been sitting back reading posts about the bms tune. I have read in some sections that guys love the tune, trash talk the tune, and some that are not sure if there tune is even active. Maybe someone out there can clear up some of the questions I have. I want to buy this tuner however I've done some serious data logging in the past with my cammed dodge charger (previous car) and I don't like what I hear about some of its complaints. Can you guys help me out?
1. I have read that over time that the f30's computer adapts to the BMS tuning parameters. Is this true? If it is, then clearly this tune is not changing any parameters at all. It would in fact be sending false AFR numbers by delaying critical engine sensors (ei: changing the PWM of the sensors). Changing the PWM of the sensors just delays the information to the computer to fool it to add more boost (not sure if everyone understands). The only phsyical change in the ecu is the request for more boost during its most unstable condition; WOT. This is where air fuel ratio tables play an important role for engine performance. If this piggy back system does what I mentioned above then its possible that our engines are running too lean since there is no physical calculations made to change the ecu's tune. The stock ecu is then down tuning itself to prevent damage. All it may be thinking is that the ocatne level is too low. 2. There is some inconsistent dyno numbers out there. I've been on a few dyno's in the past and there accuracy varies within 10 whp not 20-30 whp range. Whats happening here? 3. No one has really reported better gas mileage. Usually when you install a tune especially on turbocharged engines, your fuel economy goes up considerably. I've seen no such numbers. Increasing boost requires higher octane for many reasons but the main reason is because your leaning out your fuel tables. Usually stock cars are tunned on the richer side since the tune is much more stable in extreme temperatures. Once you get up to the higher temps, you increase your chance of running an engine lean with a performance tune. This causes misfires and a piston going through the engine hood! Anyway guys I am obviously just trying to figure out if this tune is safe. I honestly want to get the tune however I don't want to be screwing up a brand new car for an extra 15whp. Its not worth the money in the long run if I have to deal with these inconsistent variables. |
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04-15-2013, 11:21 PM | #169 | |
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1) The DME never adapts out the tuning. They have used the same basic principles on over 20,000 cars with great success over the years. It's a details business and you'd have to understand all the details to really understand how it works. For example, you probably don't know the factory fuel system runs full time closed loop using wideband o2 sensors. 2) With the N20 you get around 7-8whp per 1psi. If someone has a dyno showing only 10hp with +3psi, for example, then there is some issue with the car or how the power delta is being measured. 3) There is no change to fuel economy during normal operation. At cruise it runs 14.7:1. Under heavy boost levels, richer air/fuel ratios are targeted, and you need more fuel in general for the higher power levels, so you obviously get a slight mileage drop. But only while racing around. Mike |
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04-16-2013, 12:47 AM | #170 |
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Mike thank you! Now that would make perfect sense as to why they are plugging into the air flow sensors. Its kind of hard not to trip out an O2 sensor when you dont take into consideration the air going in! I had no idea that the fuel system was closed loop. This also answers my other questions of lean tuning. Would you happen to know if the 320i can handle the 4psi boost? I know the piston heads are different from the 328i. I also didn't know these engines run afr of 14.7:1. thats pretty lean. if i did that to my last vehicle it would be in flames lol! Again thank you for your reply.
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04-16-2013, 08:49 AM | #171 | ||
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04-29-2013, 05:47 AM | #172 | |
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Then install BMS (when the engine is cold of course) and try again. Have you changed fuel quality? Any other mod to the car? Anything different? Extra weight in the car (trunk/boot) Let us know how you go.
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04-29-2013, 02:59 PM | #173 | |
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05-01-2013, 01:38 PM | #174 | |
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05-01-2013, 02:12 PM | #175 | |
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05-01-2013, 02:20 PM | #176 | |
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