Just got a new chip burned. I am basically using a stock AUJP file. Blm's look much better now. Car seems to have gained 20 hp over the hypertech i previously had. So, my question is now this: What is the best method of adjusting AFR at WOT. I mean, i do have an AFPR, so is that the usual method of getting say a 12.5-12.8 afr at WOT? or does it have to be reburned again?

 

The proper way is to adjust the P.E. tables to add a percentage to the fuel to obtain the correct AFR. The current corrected VE table are important so the commanded AFR percentage will achieve the desired AFR at the WB.
Once it is good at the "running" temperature you should adjust the P.E. temperature table to have consistent AFR at different temps.
Adjusting these usually takes me 2-3 times to get me happy where they are at.

Using the AFPR will richen or lean the entire operating range that will hamper the operation at part throttle that you currently have.
The BLM will have to correct for the AFPR change.

 

Well, overall the cars a lot better now. My new AFR at WOT is only 11.50 now, not much better than before but the car still has tons more power than before. Also the BLM's are much closer to 128 now during closed loop. I am not too worried about part throttle really. Car actually runs better when the fuel pressure is lowered. I guess my question is this: Will lowering the fuel pressure now make the AFR at WOT come up to like 12.5 or so? and what effect will this have on BLM's? Will it raise BLM's at part throttle?

 

If it is lowered enough and the ECM stays in open loop. Although the SAM BLMs may affect it.

The BLMs will increase and then be used in WOT mode. So WOT AFR will still be low.

Best bet is to do the tuning yourself.

RBob.

 

I still dont understand what you are saying. If i lower the AFR, you are saying that WOT afr will not change? just part throttle afr?

 

You mentioned lowering the fuel pressure. Which will increase the exhaust/chamber AFR (A higher AFR is leaner).

But when the ECM goes closed loop, the long term fuel trim will increase. Negating the lower fuel pressure.

RBob.

 

Ok, I'm in Tunerpro 5. Now i see the PE info, what exactly needs to change here? I have a WOT AFR of around 11.5 or so. Also what exactly do i need to change to adjust my BLM's closer to 128? The guy that burned me the chip sent me my actual bin he used in TP5. I have been using the compare feature lately hoping to get a better overall understanding.