How is DSDRPM calculated? I assume it is base rpm + act/ect/ect start/buzz adders?
Does it suggest IACV failure if N doesn't meet DSDRPM, or do I need to open my throttle body more with the screw?
Datalog attached.
Thanks in advance!
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Should N match DSDRPM?
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1993 F250 460cid. Fiveology Racing is garbage. CBAZA T4M0. Quarterhorse tuned with binary editor.
Re: Should N match DSDRPM?
Everything I have read says, do not adjust the TB screws, Not real sure that it means the IACV is failed, but it might not hurt to give it a good cleaning.
93 F150 Ext cab, 4x4
was 302 now 351w .040
Enginetech ES1020 cam 303 NON-HO firing order
Headman shorty headers
HUG0 EEC
Mismatched axles 10.25 8 lug rear 411 D44 5 lug 3.95 (soon to be converted to 8 lug D44)
was 302 now 351w .040
Enginetech ES1020 cam 303 NON-HO firing order
Headman shorty headers
HUG0 EEC
Mismatched axles 10.25 8 lug rear 411 D44 5 lug 3.95 (soon to be converted to 8 lug D44)
Re: Should N match DSDRPM?
[link]https://www.efidynotuning.com/ [/link] says to adjust idle screw as part of base idle reset. I can't say for sure without seeing actual coding/logic, but it makes sense to me to set idle screw for minimum idle to take the load off the IACV.
I'm surprised that I haven't gotten a solid yes or no to this question.
1993 F250 460cid. Fiveology Racing is garbage. CBAZA T4M0. Quarterhorse tuned with binary editor.
Re: Should N match DSDRPM?
The stop just needs to be open a little. I set mine to 1 1/2 turns after the screw touched the throttle plate.
As for desired rpm, my Tweecer won't log it, I could never use it. IMO it's not a "must have" in the logs. I find timing advance a good indicator of idle quality, steadier the better.
As for desired rpm, my Tweecer won't log it, I could never use it. IMO it's not a "must have" in the logs. I find timing advance a good indicator of idle quality, steadier the better.
91 GT, A9P, systemax II, 75mm tb, AFP, 75mm Pro M, 42#, Vortech S trim, GT40 crate 5.0, BBK catted X, flows, Tremec 3550, Pro 5.0, 3.27 gears. Tweecer RT, TunerPro.
Re: Should N match DSDRPM?
I don't know if I can explain this totally but I'm finding that the closer my fueling is the closer to following DSDRPM the N line gets. Another factor/hiccup I see is the scaling. Sometimes the two lines are separated from each other, other times they are extremely close or on top of each other.
Hope this helped.
Larry
Hope this helped.
Larry
1993 Mustang Coupe, Boss block low compression 331 cu/in, Victor Jr. heads, TFS Stage 2 cam, GT40 tubular intake, 30# injectors, 65 mm Pro-M MAF w/balance of induction stock, BBK shortys and 2 1/2 exhaust. A9L GUFB w/Moates QH, BE and EA.
Re: Should N match DSDRPM?
I forgot about the Base idle Reset.Jtab wrote: ↑Sat Dec 28, 2024 2:14 pm[link]https://www.efidynotuning.com/ [/link] says to adjust idle screw as part of base idle reset. I can't say for sure without seeing actual coding/logic, but it makes sense to me to set idle screw for minimum idle to take the load off the IACV.
I'm surprised that I haven't gotten a solid yes or no to this question.
As for what does the DSDRPM = ??? I thought I had seen notes in one of the strats I have, but Nooooooooooo, Sorry
93 F150 Ext cab, 4x4
was 302 now 351w .040
Enginetech ES1020 cam 303 NON-HO firing order
Headman shorty headers
HUG0 EEC
Mismatched axles 10.25 8 lug rear 411 D44 5 lug 3.95 (soon to be converted to 8 lug D44)
was 302 now 351w .040
Enginetech ES1020 cam 303 NON-HO firing order
Headman shorty headers
HUG0 EEC
Mismatched axles 10.25 8 lug rear 411 D44 5 lug 3.95 (soon to be converted to 8 lug D44)
Re: Should N match DSDRPM?
Just looking back at this, and turns out, The DSDRPM is the desired RPM at Idle
93 F150 Ext cab, 4x4
was 302 now 351w .040
Enginetech ES1020 cam 303 NON-HO firing order
Headman shorty headers
HUG0 EEC
Mismatched axles 10.25 8 lug rear 411 D44 5 lug 3.95 (soon to be converted to 8 lug D44)
was 302 now 351w .040
Enginetech ES1020 cam 303 NON-HO firing order
Headman shorty headers
HUG0 EEC
Mismatched axles 10.25 8 lug rear 411 D44 5 lug 3.95 (soon to be converted to 8 lug D44)
Re: Should N match DSDRPM?
I assumed that was obvious because I asked about IACV. Idle is the only time the ecu can control rpm.
1993 F250 460cid. Fiveology Racing is garbage. CBAZA T4M0. Quarterhorse tuned with binary editor.
Re: Should N match DSDRPM?
Sorry, not only did I spew out the obvious, but I didn't even really answer the question in the title.
93 F150 Ext cab, 4x4
was 302 now 351w .040
Enginetech ES1020 cam 303 NON-HO firing order
Headman shorty headers
HUG0 EEC
Mismatched axles 10.25 8 lug rear 411 D44 5 lug 3.95 (soon to be converted to 8 lug D44)
was 302 now 351w .040
Enginetech ES1020 cam 303 NON-HO firing order
Headman shorty headers
HUG0 EEC
Mismatched axles 10.25 8 lug rear 411 D44 5 lug 3.95 (soon to be converted to 8 lug D44)
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