Before you flame me I've read the posts for idle and watched the youtube videos. I cannot get the afr to 14.6 and have a low idle; it's either 14.6afr and 1200 RPM or 10afr and 750 RPM.
Ive tried the RAF down to 7 but have went as low as 5 with it once it gets up to temp.I used a file out of the repository for a 4.8 with a similar sized cam but made some changes needed for my app (fans, tach, my injectors etc...) but airflow and spark are his.
My setup is as follows 99 4.8 swapped into 260z with a 6 speed, truck DBC TB, BBK intake manifold, Deatsh werks 18U-01-0060-8 60lb injectors for possible power adder down the road, trickflow 30602003 cam 228/230 @.50 .585/.585 112, and the HPT SD 1 bar tune, NGK AFX WB through the EGR sensor.
The other issue I have is that I'm running a CD009 transmission that does not have a VSS so the computer thinks I'm in first gear at idle all the time. I bought one of the first Autometer GPS speedometers which unfortunately does not have any type of signal output I can run to the VCM. If I make changes to the High octane table during RTT I have no noticeable idle changes. However if I RTT with the Idle tables the Base Idle spark in gear can get the RPM down to 950 if I 0 the timing out. How can I get the computer to reference the High / low octane tables? If I'm stuck with the base spark in gear it only controls up to 4800 RPM.
Attached is my current tune, a warm up log along with the HPT repository tune I referenced for mine.
cammed 4.8.hpt
cammed high idle.hpl
226-229 cam, idle air, ve, maf spark dfco, pseudo lean cruise 2007 4.8.hpt