My current tune and a log with some idle and wot. I've got it to where I think it runs good. Wot afr is around 12.5 (didn't have my wideband attached). My only want at this point would be for it to fire faster on the start? Is there a trick to that? The stock lm7 fired quick. This one takes ~2 seconds of cranking. Once it fires it starts good. Or is that just how it is with a cam? What do you think of the tune in general? Glaring issues?

It's a blueprint ls376 530hp btw.

 

My 408 was slow to start as well. It was my ground cable, sob has a sensor in it that was bad.

 

Did you check the fuel pressure from a start? What is your fuel system? Aftermarket pressure regulators don't all maintain pressure when the pump is not running. I have an aftermarket regulator, and if I turn the key on for 2-3 seconds before I crank it, the engine fires immediately. If I don't, it will crank for 2-3 seconds before it fires.

 

It pressurizes when I turn the key on and then stops. It definitely leaks down after sitting for a while. Surprisingly it doesn't seem to matter though. Regardless if I go straight to cranking or wait for the pump to shut off it takes the same amount of time. I also pulled some timing to see if that would help it start faster. Went clear down to 10 degrees and it was slower each time. It likes alot of timing apparently.