Fun tuning How too?

[cleatus12r]

That can't happen unless you have a really slow responding IPR. The PCM is able to correct idle speed and adapt to too low or high ICP to maintain a good idle.

The key is to KEEP the PCM and IPR from being able to "catch up" with the desired ICP.

The state of the HPO system is going to determine how fast the lope occurs.....and it's not just a choppy idle like other folks' "lope tunes". It's an actual ROMP.

[bsdracing]

so there is no way to really make the romp more apparent? then what about smoothing it out to sound like a 6.0 or cummins like a more constant?

[907DAVE]

I think it will take some toying around with to get the desired effect.

[bsdracing]

yeah for the lope I tryed what you were saying I pretty much had my graph look like the one you showed me but it kind of romped a bit more but almost seemed just like a rough idle or cold start type idle. I tryed droping the idle down to 550 and it seemed to help but not much at all. so now i am going to try and play with a loader smooth idle like the 6.0 what would i change to make it loader? advance timming? or start of injection?

[bsdracing]

also i was just thinking what if I were to lower pulse width?

[907DAVE]

Increasing ICP and SOI will make the idle louder, I have no idea how much to add as I was always trying to make the idle quieter.

I would not know how to purposely mess up the idle using the PW map. My first guess would be to lower it to a point where the injector will not deliver any fuel (.5ms) in the warm normal idle range, then a cell over jack it way up.

I have never really wanted to purposely mess up my idle so I do not know all the tricks.

[bsdracing]

yeah I now have a pretty good lope its just fun I see the 6.0's the duramax's and the 6.4 powerstrokes have awsome lope tunes and have not seen a really good 7.3 lope tune so i will keep playing with it but thanks guys for your help