[asshanson]

Alright I figured out why it wasn't running good at all, timing was about 10 degrees after TDC, that sucks. So I set it to 5 degrees BTDC and it feels SO much better, it's amazing what 15 degrees of timing advance will do.

Now my airflow per rev at idle is way better, fuel trims seem normal still at idle, I'm much happier with my car now. I actually did a few full throttle pulls on the highway, first time I've really gotten into it since the headgasket blew last Fall.

However, I still have one major problem to work out, spool absolutely sucks. In 4th gear I can get 5 lbs by 4k rpm, and 10 lbs by 5k rpm, something is pretty out of wack, I know there is an exhaust leak at the exhaust manifold to head, and I still have to check for boost leaks. Hopefully this fixes the super slow spool. In 2nd gear I didn't hit full boost until nearly 6k rpm. It sits solid at 16 lbs of boost though after that, I'm surprised it's that low with a 22 lb wastegate spring. Maybe the spring isn't quite 22 lbs.

Because I'm not getting boost until really late, combined with the 4R cams and the SMIM, the power curve isn't a hump, it's a straight diagonal, power climbs until 7500 which is where I let off for now. I only logged a couple pulls, but I hit 39 lb/min of airflow I believe, not bad for 16 psi and zero tuning. My A/F ratios are pretty good, around 10.7 to 10.8 with the fuel sliders all at zero, and I pulled 2 degrees of timing over 6k rpm just to be safe for now, zero knock at all.

I'm going to try to do a boost leak test in the next couple days and fix my exhaust leak, after that I'm not sure where to start looking for the slow boost reason. One thing I noted was that the estimated boost in link was a good 3-4 lbs lower than actual boost, what does that indicate?