Start off at 43.5psi (3bar) with the vacuum line off.
Then adjust up/down if needed.

 

** update **
Things are frustrating.

Adjustable FPR installed, I'm waiting to borrow a gauge to get the exact pressure as mine broke. I 'ghetto' set the fpr and am getting consistent 11.8-11.6 afr on my wideband to redline. The car seems stronger in high rpms.

The local car club had a dyno day and I took my car yesterday. All my old runs were on a dynocom and yesterday's was a dynojet so I expected a little variance. My car still did poorly, 283/294 at 18psi. I'll post a cleaner chart when I get to work to scan it.



The biggest things I've noticed is still the slow spool for a 27/6, I'm hitting 18psi at 3600 rpm still.

So... possible collapsing crossover?