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Originally Posted by mrfixxall
(Post 3739767)
was reading and you just took the words off my fingers,,yes you need to drill a hole in the throttle body,it has to be close to the iac passage tho..this way the iac can compensate with out bottoming out..you have too much prop bite and its killing the engines,have you tryed to bring them up as high as possible to see if you can get some air around the blades to keep them from killing the engines..
Tuner tech, I have heard of the pros using 2 IACS, good advice! |
I'd try to adjust the throttle blade first (assuming it has an adjustment), then reset the TPS voltage as suggested. I was able to adjust the second stage throttle blade which doesn't change the TPS settings since it is attached to the first stage throttle blade. I keep my IAC count to between 0-10 units.
I'll have to search thru the files regarding droop. |
TunerTech - can you provide some definitions for these droop tables and what they actually do? These values are from my bin file mefi 4a
idle droop spark stabilizer: 0.18000 deg/rpm (once parameter is flagged, .18deg per revolution is subtracted or added?) Max rpm droop allowed for spark stabilizer: 300 (rpm must drop 300 before spark stabilizer is flagged?) DB2 Constant large droop/flare error delay time before correction step: .0313 DB1 Constant small droop/flare error delay time before correction step: .0313 DB0 Constant droop/flare delay time before correction steep is made : .0313 I've been trying to work around a shift into fwd myself. When the motor is warm it seems to shift in/out no problem. but when it's cold, I have to whack it a bit and take advantage of the vacuum to get it in gear or be real quick on the throttle and catch it before it dies. I have noticed on my O2 readings that i get a lean spike going into gear yet I can't seem to get around it in the fuel table. Thoughts? |
DB stands for dead band It is all about transition without trying to get to technical. No time to write a book..
raise your "DB0" to .0625 raise your "step added to prevent stall" to 50. You may have to back it down if you get a little surge during the transition. What are your idle parameters and ECT when you experience this drop out? What does your desired idle table look like MAP vs Timing ECT modifiers for both fuel and ignition At what point in your tune do you drop out all compensation regarding timing and spark. What is your engines running temp Do you run a thermostat Tuning for mannerism is a challenge but not to bad once you understand the caveats/ You should call some time and we can discuss.
Originally Posted by Griswald
(Post 3740147)
TunerTech - can you provide some definitions for these droop tables and what they actually do? These values are from my bin file mefi 4a
idle droop spark stabilizer: 0.18000 deg/rpm (once parameter is flagged, .18deg per revolution is subtracted or added?) Max rpm droop allowed for spark stabilizer: 300 (rpm must drop 300 before spark stabilizer is flagged?) DB2 Constant large droop/flare error delay time before correction step: .0313 DB1 Constant small droop/flare error delay time before correction step: .0313 DB0 Constant droop/flare delay time before correction steep is made : .0313 I've been trying to work around a shift into fwd myself. When the motor is warm it seems to shift in/out no problem. but when it's cold, I have to whack it a bit and take advantage of the vacuum to get it in gear or be real quick on the throttle and catch it before it dies. I have noticed on my O2 readings that i get a lean spike going into gear yet I can't seem to get around it in the fuel table. Thoughts? |
Originally Posted by tunertech
(Post 3740565)
What is your engines running temp Do you run a thermostat . No thermostat and motor typically does not run over 130deg. It would be easier to send you my bin file and I appreciate the offer of a phone call. I will take you up on that. Clark |
Originally Posted by tunertech
(Post 3740565)
DB stands for dead band It is all about transition without trying to get to technical. No time to write a book..
raise your "DB0" to .0625 raise your "step added to prevent stall" to 50. You may have to back it down if you get a little surge during the transition. What are your idle parameters and ECT when you experience this drop out? What does your desired idle table look like MAP vs Timing ECT modifiers for both fuel and ignition At what point in your tune do you drop out all compensation regarding timing and spark. What is your engines running temp Do you run a thermostat Tuning for mannerism is a challenge but not to bad once you understand the caveats/ You should call some time and we can discuss. |
As posted earlier check IAC and if it is maxed out try to open throttle blades before drilling holes! Lots of good advise in this thread!
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