I have an noticible lag with onset of AE. This is normal city driving at speeds under 30.

More importantly is a bog slowing down to turn corner in second gear of 4(manual)then accellerating moderately. WB pegs 20/1. My options are to downshift or floor it. I have tried several variations on AE tables. First I had 66% of my AE in TPS and remainder in MAP. I thought that the MAP was rising while I was turning as throttle was opening causing VAC to fall. My thought was that maybe I could capture that and have MAP AE enriched. So I went more like 50/50 on tables. I recall a thread a while back where Dimented suggested most of AE should be in MAP? I think that is contrary to GM AE .bins. But that migh be a better idea? I also took table TPS and added more down low % so a small %TPS would see more fuel. I also added more AE in MAP from 40MAP on up to offset the enleanment.

I think my issue is that fuel is falling out with the drop in VAC due to intake volume for me being on high side and velocity drops to nill during event. I have the VE tables in that area rich 121-124 BLM. I do get VE Learn there and it enleans VE tables over time. I think I can run OL under 20 mph. Is that true? I will check and fatten up if so VE.

I recently added the IAC control and added TF enrichment by 25% over stock EBL .bin. Should I continue adding in that area ? Not sure if that will be an earlier AE event.

comments?

 

Hiding AE in the VE tables is a common trick. Maybe not very well, known, but is common and works well.

You can lower the delta TPS% requirement for AE also. This is usually required when larger TB's are used. Same with the delta MAP qualifier.

Can add fuel via the IAC opening pulse. However, need to be careful to not add too much. As it will also affect the stall saver. As a matter of fact the stall saver going lean/rich should be used to set the IAC opening fuel pulse.

Also, the amount of TF per TPS movement can be adjusted. This too will affect how the vehicle drives.

RBob.

 

MAP/TPS AE split is based off of driver preference and the engine. I know with my automatic transmission, my engine did not like much map ae. If I put much of any MAP AE in it, it would bog out between part-throttle upshifts from the extra fuel. I like just enough TPS AE to cover the hole immediately after smacking the throttle and it would take off, it would flash up against the converter, take-off and FLY. With most of your AE on the TPS side of things, you have better throttle response, and better control. When you have AE on the MAP side it is slower to kick in and the throttle is initially less responsive, followed by a large un-controlled surge. I find it easier to launch (especially on a rain slick street where too much MAP AE causes crazy wheelspin) with mostly TPS AE. In my experience TPS AE has been the clear winner.

As you can see my AE rises instantly with throttle and the engine responds instantly. I need to work on DE a little, but its really only spikes like that when I throttle the motor with no load.

 

Thanks for the response.
I have the delta TPS % set at 1 currently. MAP is 3.5. I will change to 1kpa. I dont see enrchment on stall saver. Sometimes I see SS event and other times not. Occasionally idle is rock steady at 850 rpms and sometimes drops down below 700 and SS reacts. TF per TPS movement. Was at 2 now at 1. I see no way to lock open loop under say 12 MPH.

Fast:
Is that a 7.4L TB? With the edel vortec 2 barrel manifold? Part of the issue is that with my 80 lbs inj I have little range at 61 msec times multiplier. richt now I have

 

Thats TPI with the stock TB, runners, and an Edelbrock Vortec TPI intake on a L31 Vortec 350 with a bigger cam.



The TBI engine LOVED TPS AE though, especially with the ported vortecs and high rise single plane manifold. TPS AE acts quicker because the throttle moves first, then the rush of air comes in, finally with the rush of air the MAP increases and then MAP AE kicks in.

Don't forget depending on the ECM code you are running there are a couple of filters and several multipliers for TPS AND MAP AE.

TPS AE Filter - Helps control the rate at which AE is added (ramp-in)
TPS AE Delay - Helps control the duration and decay of AE (duration/ramp-out)
MAP AE Filter - Same as TPS AE, except for MAP
MAP AE Decay - Same as TPS AE, except for MAP
Engine RPM - Is a multiplier to account for AE requirement vs. engine speed, typically an engine turning slower, needs more AE.
Coolant Temp - Multiplies AE in regard to engine temp, cooler engine needs more fuel than a warmer one
IAT - Cool dense air needs more fuel than warmer, thinner air.
Baro - Denser air needs more fuel than less dense air
TPS Double- Above x TPS ECM DOUBLEs AE pulsewidth, this is for more fuel when you really get on it from part-throttle.

 

Yes I am aware of those and did tweek them. Hopefull in right direction.

your comments on TPS movement B4 map event takes place make sense.