Shame I cant understand it!
And very surprised he getting that power with standard inlet manifold!
Why are you surprised?
200BHP is easily achievable on a standard inlet manifold...how well it idles, may be in question, but it'll make the power.
The Group A rally cars were using 'stock' manifolds at over 200 BHP.
I can get mine to make over 200BHP on a standard inlet & exhaust manifold...but for road use, where an MOT is required and emissions tests need to be passed, it's not practical due to the ECU MAP sensor getting confused by pulsing in the plenum caused by big duration cams.
But, once above 3000RPM the pulsing clears and the engine pulls...to over 200BHP. On 268 cams. More, on 276s.
All on a 'standard' inlet manifold.