Mutha Thumpa Cam Help

[jmsmotorsport]

am trying to get a rebuilt ls1 running a Mutha Thumpa cam idling and running properly. Will use RAFPN etc but I cant really get it to idle so I can apply it. I know everyone says don't worry about AFR at idle but its showing 12.5ish at idle an 22 degrees if I use DVT and lean it out idle improves so I know its to rich. I've been reducing my VE in the idle area to fix this but how low will the VE end up? and will I end up with a very low VE and then a big step up as rpm increases?

Would anyone have a base tune that I could look at to make sure I'm heading in the right direction.

[statesman]

Big fuel injectors?

[jmsmotorsport]

Big fuel injectors?

Nah mate just factory ones.

[statesman]

Can you give a list of mods and post your tune file and a log of your idle.

[jmsmotorsport]

No mods list it’s literally a factory rebuilt spec ls1 with a mutha thumps cam.

[statesman]

You're running that cam with stock valve springs?

[jmsmotorsport]

Plus supporting mods in the valvetrain for cam.

[statesman]

Okay. Your VE will be lower at idle with that cam. How low has it gone so far?

[jmsmotorsport]

Log_0019.efiJerryCustomOS5.ctz

[statesman]

I'll have a look through your tune and see what I can find.