elderc

I'am posting this because it may be helpful for those who are still using "old school" EMB. People will say that the EMB will not idle 460's but I can tell you for sure it will work on the NB's what I did was take 460cc divided by 1.5 ( 50%) = 307 cc put these numbers in and the stock ecu will idle and run just fine.....sorry about the crappy cell picture but you can see A/F's and TPS@ 0 and RPM's are normal (I'am data logging through 3rd party software)

messiahx

iTrader: (2)

Nice work. People have always gone by that 150% rule but that doesn't mean you can't go bigger. My guess is the stock ecu is probably trimming the rest of the extra fuel.

I'm surprised you got eManage.Tools working. I never could get it to do anything consistently. Of course, I run MS now, but I've still got the EMB saved for future projects.

elderc

Yes, the stock ecu trims the difference. Because the operating range for the stock ecu @ idle is 1.7-2.4 v the EMB trims it to 2.0 v that falls into the operating range of the stock ecu for a 14.7 idle. ( I also posted the fuel and timing map for this under the "post your emanage maps" )

4sfed5

i did some data logs many years ago that showed that the ecu stopped trimming fuel Changing afm voltage)once you had reached a certain Minimum airflow voltage level... this happened to be about 330cc or so...so if you put a higher value in it simply didn't trim out any fuel.
you can get more fuel out at idle by changing your clocking crystal for one about 10-15% higher in frequency. this will obviously pull out 10-15 more fuel

elderc

4sfed5 the NB's don't use a AFM, they use a MAF which has a wider operating range.
Thats why it will work. (1999 shop manual voltage range 1.7-2.4 v @ idle ) 460cc-307cc=1.98 v 460cc-280cc=1.88 v both fall with-in the 1.7-2.4 v range. trust me it works..........No need to clock the crystal at least on the NB's.