I am not sure where to pursue this issue at.

I got my AE intial pump shot (tip-in) REALLY GOOD using a little more "Accel enrich delta TPS multi VS coolant temp: "

The problem now, is there doesn't "feel" to be enough fuel after I hit TPS at 40% I get the great intial acceleration, but with my taller gears (and bigger tires) I lose power after ~ .5 - 1.5 seconds waiting for the engine to climb rpms.

I think I should be looking at the "Accel enrich delta map PW decay factor VS coolant temp: "
This is the slope after the pump shot correct? I tried DECREASING these settings (assuming the percentage is the time percentage) with little effect.

Or should I be looking at the "Accel enrich map PW multiplier VS delta map: " This would effect fuel delivery as the MAP is changing due to RPMs increasing...

Or is it a "constant" issue? Accel enrich delta TPS scale factor: I tripled this constant, and this appeared to help the tip-in as well as all around AE. Should I change it back and start over?

Thanks.
Just not sure which table to pursue.

 

Might try lowering the PE TPS enable. And check the other enables.

AE should just be needed to cover to getting into PE. Detonation issues aside.

Excessive timing also takes AE to overcome, and then they start working against each other after a point. Ramping out a lil more timing faster might also help.

 

Thanks for the reply Grumpy.

Currently my PE Enable TPS is set for 70%.

To clarify what I am feeling...

It seems like the engine lost fuel no matter where my TPS is. It is always after Tip-In the engine seems to have spent it's fuel, I get this (almost a turbo lag), until I hit the TPS delta (back off accelerator and hit it near the same position) again, then I get more fuel and it goes happy again.

I wonder if my UPPING the TPS scale factor effected it??? Perhaps I should have left it alone at 12?


Thanks again for the reply.

 

hows your fuel pump ? running big injectors ? sounds like your losing some phsyical fuel voluem. like a pressure surge.

 

Turbo Lag, ugh, OK.

I degress,
anyway, I use 18-24% TPS for my PE enable. But, my turbo spools instantly so I can use the fuel/Timing/EGT to my advantage. Or should I say because of my Fuel/Timing/EGT my turbo spools instantly.

 

Thanks for the replies. Acutally, it's more of a reverse turbo lag. I get a big kick for about .5 maybe a full second, then I get "less" power.

I have another fuel pump to try and most likely my injectors are too small.

Perhaps I have a clogged fuel filter???
Hmm, I will change the pump and filters tomorrow.

ALthough today, provided I am in Open Loop (program it for 250 degrees), it runs GREAT! Yet, I see a LOT of fuel going through the injectors (based on PW).

I am using the AXCN, for base timing. My timing and power seem very good at or above 2000. It's the lower 800 - 1600 or 2000 rpms that seems missing. Shall I try retarding the whole table (2 or 4 degrees) and see what I get?

Thanks for the help.

 

I think I found my issue...

Now if I just didn't mess with just about every other scale...

I think my problem is based on different TPS % changes.

Hence, I started to pursue Accel Enrich Delta TPS Mult vs. Delta TPS

I still have some MAP issues, but I will take care of that after the Delta TPS is done.

Comments and suggestions are still welcomed. :hail:

 

I have been debating the very same changes you are contemplating as well.... Keep giving the A/E D. vs D. TPS the evil eye and also the Decay factor A/E as well.............

Going to try and play with some open loop tuning this weekend (3 days off yeahhhhhhhhhh)

But my A/E always dips beautifully and then as it comes off I get a little lean spike into the lowww 15's range. Experienced knock during these episodes as well...

I will comment on one thing, if u have never tried tuning open loop and you have a wideband that is trustworthy, give it a try and see how your engine responds..

Another hint that has been mentioned here before, I did the open loop testing using a Injector constant almost eaxaclty what my 30# should flow at 48 psi and that helped tremendously as well , lot more of the tip in stuff(A/E cough cough) seemed to be inline.

I only got about 2 miles on my car just goofing around one nite(it broke :-) ) but good golly was it a nite and day difference, I was shotgun with Tuner RT and the lady driving and it was instantly noticeable

later
JEremy

 

One thing about the $8D mask (and some others) is that it will throw away AE pulses. Yep, right in the bit bucket. So as the AE tapers off it will actually end suddenly. Not in a nice tapering fashion.

RBob.

 

Even when changing the decay rates? (for more decay, I decrease the % right?)