I tune using TunerPro RT and a wide band O2 sensor (WBO2). Post a WBO2 data log from TunerPro RT, I'll let you know what I find out. See attached screen shots.
dave w
I tune using TunerPro RT and a wide band O2 sensor (WBO2). Post a WBO2 data log from TunerPro RT, I'll let you know what I find out. See attached screen shots.
dave w
Dave,
How much do you charge to tune?
I have an 87 V20, preparing to swap the engine for an 010 4 bolt main freshly rebuilt. Will be running ported & polished 062 Vortec heads worked for 550 lift springs, Lunati 10120701 cam & lifter kit, 1.6 full roller rockers, summit dual plane intake, Hooker longtubes. I'm currently still running the TBI motor and have done the exhaust and ultimate TBI mods. My computer is still stock. Will I need to have any work done to it, to be able to upgrade it? I'm weighing the costs of going carb or staying with TBI.
thanks
Jamie
Looking for someone who does mail order tuning, or even emailing back and forth. These guys are made aware that if the tuner is not in person, there may be some equipment to purchase.
Hi dave w
Is a WBO2 sensor different than stock from 1995?
What are the advantages of tuning from O2 readings, compared with tuning from the BLM values to get the base VE tables right?
Yes a 5 wire WBO2 is different than the stock single wire O2 sensor. The best way to think of a WBO2 is the WBO2 is a measurement tool, similar to an exhaust gas analyzer used in automotive repair facilities. The 1995 computer does not use the WBO2 information to control the BLM's, that the job of the factory single wire O2 sensor.
Tuning with BLM's is an good way of tuning. WBO2 tuning is a better way of tuning, because the 1995 computer "LOCKS IN" the BLM's at 128 during Acceleration Enrichment (AE) and Power Enrichment (PE). The 1995 computer "ASSUMES" the VE table is correct and "ASSUMES" the added fuel programmed for AE and PE are correct for a "BONE STOCK" engine. Who heck needs tuning for a "BONE STOCK" engine?? When the 1995 chip is correctly configured and the exhaust system has a WBO2 sensor (installed as an additional sensor / still using the single wire O2 sensor), the data log can be sorted to find the actual AFR for AE and PE so the the correct amount of fuel can be programmed for a modified engine.
dave w
Where would you recommend adding the WBO2? As close to the head as possible? I have a 5.7 TBI in my 89 S10, and am gearing up for tuning it.
-Phil, in Charleston, SC
'89 S10 Blazer: SOA SAS: Dana 44s, 5.7L V8, 700R4; 35s, 4.10:1; TBI with 1227747 ECM
'94 Grand Cherokee: 4.0, 4" lift, 31s
'90 Jeep Cherokee: In progress: 5.7L V8,700R4,NP231C, D44s. TBI with 1227747 ECM
'87 Fiero GT: 3.8SC (initial research stage)
Thanks for the explanation. I haven't gotten to the AE and PE yet.
How do you 'read' the 2ndary sensor datastream? Are you replacing the entire TBI ECM with something else?
Should I still start with getting the base VE table as best I can for closed loop, under partial throttle?
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