Idle Tuning writeup
#1
Idle Tuning writeup
Please comment extensively, this is very much work in progress.
http://redhardsupra.blogspot.com/200...le-tuning.html
http://redhardsupra.blogspot.com/200...le-tuning.html
#2
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Very well written, as can be expected from you!
Any details on adjusting the IAC Effective Area for stock & drilled/set-screwed guys? This confirms my desire to start with a stock tune and redo it all over instead of the mess I have going on now. Thanks. Charlie
Any details on adjusting the IAC Effective Area for stock & drilled/set-screwed guys? This confirms my desire to start with a stock tune and redo it all over instead of the mess I have going on now. Thanks. Charlie
#3
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what else do you plan to include in here. i think you should stress some importance of order of changes when fine tuning. i guess noone cared about the last write up i did so if you want more of the info i added in there let me know, people seem to check yours out more tahn mine...
now those ford 42#ers in that bocsh sheet you dug up has different ratings in there if im not mistaken, ill have to compair to the numbers you put up on there. my setting for 62 psi rail pressure are about 50 lb/hr
cat3, what do you need to know aobut IAC effective area? i would recommned putting it to stock and working from there. i am trying to work out a spread sheet that will build a table but i suck at that special **** in excel.
now those ford 42#ers in that bocsh sheet you dug up has different ratings in there if im not mistaken, ill have to compair to the numbers you put up on there. my setting for 62 psi rail pressure are about 50 lb/hr
cat3, what do you need to know aobut IAC effective area? i would recommned putting it to stock and working from there. i am trying to work out a spread sheet that will build a table but i suck at that special **** in excel.
Last edited by WS6FirebirdTA00; 08-21-2005 at 03:49 PM.
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#8
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Excellent work RHS!
Not many people realize how much time and effort it takes to put a document like this together.
In the very near future, I will be attempting to get my bird to idle at 700. If I find anything to add to your doc, I'll email it to you.
Not many people realize how much time and effort it takes to put a document like this together.
In the very near future, I will be attempting to get my bird to idle at 700. If I find anything to add to your doc, I'll email it to you.
#9
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for all you guys needing help on effective area, hopefully RHS can come up with some excel sheet for calculating. im not too good at data look up but he seems to know hit excel **** lol im just trying to give him a simplified version of how i make my changes with a half *** spread sheet and hope he can make sense of it
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I was shifting cells right like many of us here, but just like the RAF's, I am psoitive using math (which I totally suck at) you can derive a sheet to calculate the new values per cell, instead of using the same numbers and shifting. Hopefully.
#11
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yeah, dont shift its totally worthless. the way i do it by hand is easier said than done. if you have logs you can send me i can show you but what you want to do is if the dynamic airflow is lower than the desired airflow you want to add to the effective area table. on mine, there was a point where the desired and dynamic crossed, from this point i started to slowly add until the point where it looked like the difference kinda steadied out between the 2 airflow values. for every g/sec the difference in the airflow, i figured up about 15 iac steps. each combo will be different but after you play with it you will get the hang of how much you should change it. if my words are too confusing email me the tune and log file and ill put it in a spread sheet, im sure you will see it after i show you with numbers. budchevy358@yahoo.com
if you look in the last write up i did. i posted up screen shots of the log as well as what the table looked like before and after so you could get an idea of the changes that i made. just remember after you change the effective area it will throw off your idle airflow and you will have to adjust that. a change in ve after this will also throw off the idle airflow AND effective area. so when you do all this stick with the same VE table, in the end if you want to come bgack and change the ve you can and only idle changes that will have to be made would be effective area and idle airflow
if you look in the last write up i did. i posted up screen shots of the log as well as what the table looked like before and after so you could get an idea of the changes that i made. just remember after you change the effective area it will throw off your idle airflow and you will have to adjust that. a change in ve after this will also throw off the idle airflow AND effective area. so when you do all this stick with the same VE table, in the end if you want to come bgack and change the ve you can and only idle changes that will have to be made would be effective area and idle airflow
#12
to do list:
1. throttle by wire section, since vettes and trucks (i think) use it. it is the way of the future anyway. anyone got a vette i can borrow?
2. symptom-solution section, lots of people figured out parts of it, now they just need to address a specific thing
3. more on 'eyeballing your spark' and over- and underspeed tables, i already got questions about that.
4. more popular injectors configs, i only have experience with the 4 I listed, if you got good solid data for some other ones that you can really vouch for, send it to me and i will post it.
other than that, thank you for all the feedback and commentary, i got over 70 hits in first 5 hrs, so apparently there's enough fbodies out there that idle like ****
1. throttle by wire section, since vettes and trucks (i think) use it. it is the way of the future anyway. anyone got a vette i can borrow?
2. symptom-solution section, lots of people figured out parts of it, now they just need to address a specific thing
3. more on 'eyeballing your spark' and over- and underspeed tables, i already got questions about that.
4. more popular injectors configs, i only have experience with the 4 I listed, if you got good solid data for some other ones that you can really vouch for, send it to me and i will post it.
other than that, thank you for all the feedback and commentary, i got over 70 hits in first 5 hrs, so apparently there's enough fbodies out there that idle like ****