I've got an 89 L98 Shortblock , TF Heads, 218/224 495/503 112 lsa cam, 1.6rr's and a Superram. Right now I'm running the stock 89 Chip. Blms seem to be working pretty well. Idle is at 127 and WOT is showing 129-130. The car's range is 122-130. Nothing more, nothing less throughout various driving. Should I stick with that and work on other stuff? Fastest so far is 13.5 @ 102

 

That looks pretty darn good, but the BLM's at WOT mean nothing, the ECM isn't using that data at that time.

 

Wait till you get that thing tuned better You'll see some 12's. BLM's are ok for an untuned engine.

 

What size injectors are you using?

 

MSD 22lbs

 

BLMS really are just how "off" his static tables are to 14.7.. Your car's gonna pretty much run the same at this point in all your part throttle.

In theory, the O2 sensor should keep the car running perfect, but because it needs to diviate from the static settings in the VE (or maf) tables, it goes up and down and can run crappy. In an ideal world, your maf/map tables will be perfect (hence why people like to tune with WB, then run open-loop only). But since temp/climate changes are reality, your doing good.

Now you wanter tinker with PE (or whatever the maf equal is), since, that's really whats being used when you wanna go fast anyway..

-- Joe