Does anyone know the best way to increase pump shot using tunercat tables for 89 TPI? I looking to cure an off idle lean condition.
thanks

 

It's in the Acceleration Enrichment tables (AE = pump shot).

 

thanks

 

Ive been playing with this table in tunercat. My car would buck and stumble leaving a light. I increased the values a little at a time and difference was amazing. It pulls light a freight train now at part throttle Smooth all the way to redline. I have a 58mm tb and a SuperRam plenum so I guess the motor really needed the extra shot.

 

Exactly which table or tables did you modify? In Tunercat 6E there are many AE tables. I just swapped to an LT1 intake and have the same problems. How much did you have to add?

 

I had this same problem on my MAF miniram set-up. I adjusted the (1) Injector pulse width correction vs. Battery volt. for the 12.8 & 14.4 values a little higher for that idle leaness, (2) LV8 accel. enrich. factor vs. Delta LV8 adjusting the 1st 2 values a little higher than stock, and finally I played with the 1st MAF table to again help out idle, but I just increased #s slowly and really didnt make that much of change in here. I would leave the last for the very lst alternative, and concentrate on the others first.
Good Luck,
Joe

 

Thanks Joe. Were you successful in smoothing it out? I've been searching archives and some say you have to make big changes to the multiplier in the "LV8 AE vs Delta" table to see any difference. Did you happen to try Glen's method of lowering the "%tps to enable PE" to 5% at 400 rpm?

 

Steve10,
Sorry I forgot to add that you should also change the "%tps to enable PE" to 5% at 400 rpm as per Glen. That also made a difference. As far as changing the LV8 AE vs Delta my values for 0 are .146, 64 are .148, and 128 is at .156 which I think is stock. Those were my significant changes to this table. You might try to use inj vs bat volt, and add a few to the 12.8 and 14.4 range. I also bumped up my fuel pressure to about 46 psi, which I beleive helped out as well. I can say that I now have no pops, hesitations, or nasty intake backfires, and it moves damn nicely now. Keep trying and listen to some of these guys on the boards like Grumpy and Glen to name a few. Do some searching too, you can look up my name and a guy named 89vette for a lot more of this information.
Good luck