For all the people that haven't got there WBo2's yet.
Has anyone made a chart that lists a/f raitos and blm's?

 

Really good post....


https://www.thirdgen.org/techbb2/sho...hreadid=210850

 

missed that one (was in Iraq) and didn't spell it all out to find it in the search (learn something new all the time)

 

BLMs is just the correction factor to adjust the average AFR to 14.7:1.

As far as WOT, I've in back to back runs, had an .820v O2 reading be, 12.5, and then 11.8. And I went back and forth with settings, and they were repeatible, ie the NB wasn't really worth much.

The NBs are just too sensitive, to Backpressure, and EGT, IMO, to be realiable. While some have gotten them to work OK, on their car, IMO, that's vastly different then saying 830mv is safe for everyone.

 

POI. pre WB i worked on BLMS to get them in line. datalogged for about 20 logs and burned chips. this was 1st set up in sig. FP was 13. set A/F to 12.0 for PE. went to dyno and with their WB on 2 consecutive runs ran 12.3/1 and 11.9/1. point is i "guess" PE falls into line if the underlying fuel tables are OK. i expected to be lean but was not. a mild cam kept me out of trouble(ignorant bliss).

 

Thanks for the replies what I need / wanted to know was that after say .900 mv is extra fuel which would act like a choke being stuck on. A boggggggggg and the fact that it's wasting fuel.

 

i would expect without a WB one would look at plug readings or G Tech data. with WB possibly all three. i have commanded currently 12.5/1 and am satisfied with that. no GTECH(yet) no plug reads(yet). i have no place to run WOT for more than 5 secs at a time for fear or fear itself. last run was 13.3/1 at 5 sec of WOT to 105 mph, commanded to 12.5, so upped FP from 13 to 20 and result was idle issues. so back to 17 FP and will run WOT and see if i can get under 13/1 PE/WOT. eventually GTech and see if running richer(12.25/1) will help. no magic A/F from what i hear.