Question about tps threshold to double AE term.
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From: Moorestown, NJ
Car: 88 Camaro SC
Engine: SFI'd 350
Transmission: TKO 500
Axle/Gears: 9-bolt w/ 3.23's
Question about tps threshold to double AE term.
I had a question about the following in the code for my ecm:
Seems like its been so long I cant even remember but the last time I drove my car, after having fixed the ign. problems, I noticed that after so much off idle opening it seemed to develop a bit of a stumble. Could it be due to this? It seems like this could add a whole mess of AE if the throttle was suddenly opened. I assume its intent was to provide additional AE at high load when the throttle was further opened?
Code:
;
;-Double AE term if enough %TPS
;
LDAB L0043 ;%TPS
CMPB LD1DA ;128, 50% tps
BLS LD666 ;Bra if tps is <=
;
ASLA ;AE x2
BCC LD666 ;Bra if no overflow
;
LDAA #$00FF ;Clr overflow
BRA LD666 ;Bra to save Supreme Member
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From: In reality
Car: An Ol Buick
Engine: Vsick
Transmission: Janis Tranny Yank Converter
Re: Question about tps threshold to double AE term.
Originally posted by dimented24x7
I noticed that after so much off idle opening it seemed to develop a bit of a stumble. Could it be due to this? It seems like this could add a whole mess of AE if the throttle was suddenly opened. I assume its intent was to provide additional AE at high load when the throttle was further opened?
I noticed that after so much off idle opening it seemed to develop a bit of a stumble. Could it be due to this? It seems like this could add a whole mess of AE if the throttle was suddenly opened. I assume its intent was to provide additional AE at high load when the throttle was further opened?
Small slow throttle openings should get you perfect accleration just using the VE table. As you work on quicker transistions, you can add AE, and lower the PE TPS enable. Least that's what Doc seems to be having good luck with. Then as you get further along break the AE into MAP vs TPS.
The code question I'll leave for others.
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Joined: Jan 2002
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From: Moorestown, NJ
Car: 88 Camaro SC
Engine: SFI'd 350
Transmission: TKO 500
Axle/Gears: 9-bolt w/ 3.23's
After pretty much doubling the MAP AE stuff and adding in more TPS AE in the first two cells, I got the AE to the point where it was acceptable over most conditions. A sudden slam to the floor, opposed to jsut stopping part way, would mean that it would stumble for a sec before it cleared up and got going. I wasnt running much timing, jsut what I needed to get the motor to run decent. hmm... maybe when I get the car running try maxing out the threshold so it doesnt double the term and see if it helps any?
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Joined: Jun 2000
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From: In reality
Car: An Ol Buick
Engine: Vsick
Transmission: Janis Tranny Yank Converter
Originally posted by dimented24x7
maybe when I get the car running try maxing out the threshold so it doesnt double the term and see if it helps any?
maybe when I get the car running try maxing out the threshold so it doesnt double the term and see if it helps any?
And in some apps it really is hard to tune around the converter/ drivetrain inertia. While it's only 6" in diameter, trimming 4 lbs. off my crank pulley made a noticeable difference in the amount of AE I had to run.
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